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Электронный компонент: PCA82C252

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DATA SHEET
Product specification
Supersedes data of 1997 Mar 07
File under Integrated Circuits, IC18
1997 Oct 28
INTEGRATED CIRCUITS
PCA82C252
Fault-tolerant CAN transceiver
1997 Oct 28
2
Philips Semiconductors
Product specification
Fault-tolerant CAN transceiver
PCA82C252
FEATURES
Optimized for in-car low-speed communication
Baud rate up to 125 kBaud
Up to 15 nodes can be connected
Supports unshielded bus wires
Low RFI due to built-in slope control function
Fully integrated receiver filters.
Bus failure management
Supports one-wire transmission modes with ground
offset voltages up to 1.5 V
Automatic switching to single-wire mode in the event of
bus failure
Automatic reset to differential mode if bus failure is
removed.
Protection
Short-circuit proof to battery and ground in 12 V
powered systems
Thermally protected
Bus lines protected against transients in an automotive
environment
An unpowered node does not disturb the bus lines.
Support for low-power modes
Low current sleep/standby mode with wake-up via the
bus lines
Power-on reset flag on the output.
GENERAL DESCRIPTION
The PCA82C252 is the interface between the CAN
protocol controller and the physical bus. It is primarily
intended for low-speed applications, up to 125 kBaud, in
passenger cars. The device provides differential transmit
capability but will switch in error conditions to a single-wire
transmitter and/or receiver.
QUICK REFERENCE DATA
ORDERING INFORMATION
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MIN.
UNIT
V
CC
supply voltage
4.75
-
5.25
V
V
BAT
battery voltage
no time limit
-
0.3
-
+27
V
operating
6.0
-
27
V
load dump
-
-
40
V
I
sleep
sleep mode current
V
CC
= 0 V; V
BAT
= 12 V
-
50
-
A
V
CANH
,V
CANL
CANH, CANL input voltage
V
CC
= 0 to 5.5 V; V
BAT
0 V;
no time limit
-
10
-
+27
V
V
CC
= 0 to 5.5 V; V
BAT
0 V;
t < 0.1 ms; load dump
-
40
-
+40
V
V
DROP(H)
CANH transmitter drop voltage I
CANH
= 40 mA
-
-
1.4
V
V
DROP(L)
CANL transmitter drop voltage
I
CANL
= 40 mA
-
-
1.4
V
t
PD
propagation delay
TXD to RXD
-
1
-
s
t
f
bus output fall time
90% to 10%
-
0.5
-
s
t
r
bus output rise time
10% to 90%
-
0.5
-
s
T
amb
operating ambient temperature
-
40
-
+125
C
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
PCA82C252T
SO14
plastic small outline package; 14 leads; body width 3.9 mm
SOT108-1
1997 Oct 28
3
Philips Semiconductors
Product specification
Fault-tolerant CAN transceiver
PCA82C252
BLOCK DIAGRAM
Fig.1 Block diagram.
handbook, full pagewidth
MBH548
FAILURE DETECTOR
PLUS WAKE UP
PLUS TIME-OUT
WAKE-UP
STANDBY
CONTROL
INH
1
WAKE
7
STB
5
EN
6
TXD
VCC
2
NERR
4
RXD
3
TEMPERATURE
PROTECTION
DRIVER
RECEIVER
16
k
BAT
14
VCC
10
13
GND
FILTER
FILTER
PCA82C252
9
11
12
8
RTL
CANH
CANL
RTH
1997 Oct 28
4
Philips Semiconductors
Product specification
Fault-tolerant CAN transceiver
PCA82C252
PINNING
SYMBOL
PIN
DESCRIPTION
INH
1
inhibit output for switching external 5 V regulator
TXD
2
transmit data input, when LOW bus data will be dominant, when HIGH bus data will be recessive
RXD
3
receive data output, when LOW bus data will be dominant
NERR
4
error output pin, when LOW a bus error exists
STB
5
not standby digital control input signal (active LOW)
EN
6
enable digital control input signal
WAKE
7
not wake input signal, when pulled down INH becomes active for wake-up (active LOW)
RTH
8
termination resistor, CANH line will be high-impedance with certain bus errors
RTL
9
termination resistor, CANL line will be high-impedance with certain bus errors
V
CC
10
supply voltage (+5 V)
CANH
11
high voltage bus line, will be HIGH in dominant state
CANL
12
low voltage bus line, will be LOW in dominant state
GND
13
ground
BAT
14
battery voltage
Fig.2 Pin configuration.
handbook, halfpage
PCA82C252
MBG621
1
INH
2
3
4
5
6
7
14 BAT
TXD
GND
RXD
CANL
NERR
CANH
STB
VCC
EN
RTL
WAKE
RTH
13
12
11
10
9
8
1997 Oct 28
5
Philips Semiconductors
Product specification
Fault-tolerant CAN transceiver
PCA82C252
FUNCTIONAL DESCRIPTION
The PCA82C252 is the interface between the CAN
protocol controller and the physical bus. It is primarily
intended for low speed applications, up to 125 kbaud, in
passenger cars. The device provides differential transmit
capability to the bus and differential receive capability to
the CAN controller.
To reduce RF interference the rise and fall slope are
limited. This allows the use of an unshielded twisted pair or
a parallel pair of wires for the bus. Moreover, it supports
transmission capability on either bus wire if one of the bus
wires is corrupted. The failure detection logic automatically
selects a suitable transmission mode.
In normal operation (no wiring failures) the differential
receiver is output to RXD. The differential receiver inputs
are connected to CANH and CANL through integrated
filters. The filtered input signals are also used for the single
wire receivers. The CANH and CANL receivers have
threshold voltages that ensure a maximum noise margin in
single-wire modes.
Failure detector
The failure detector is active in the normal operation mode
and detects the following single bus failures and switches
to an appropriate mode:
1. CANH wire interrupted
2. CANL wire interrupted
3. CANH short-circuited to battery
4. CANL short-circuited to ground
5. CANH short-circuited to ground
6. CANL short-circuited to battery
7. CANL mutually shorted to CANH.
The differential receiver threshold is set at
-
2.9 V.
This ensures correct reception in the normal operating
modes and, in the event of failures 1, 2 and 5 with a noise
margin as high as possible. These failures, or recovery
from them, do not destroy ongoing transmissions.
To ensure speed requirements the differential receiver has
an acceleration function.
Failures 3 and 6 are detected by comparators connected
to CANH and CANL, respectively. If the comparator
threshold is exceeded for a certain period of time, the
reception is switched to the single-wire mode. This time is
needed to avoid false triggering by external RF fields.
Recovery from these failures is detected automatically
after a certain time-out (filtering) and no transmission is
lost.
Failures 4 and 7 initially result in a permanent dominant
level at RXD. After a time-out, the CANL driver and the
RTL pin are switched off. Only a weak pull-up at RTL
remains. Reception continues by switching to the
single-wire mode via CANH. When failures 4 or 7 are
removed, the recessive bus levels are restored. If the
differential voltage remains below the recessive threshold
level for a certain period of time, reception and
transmission switch back to the differential mode.
If any of the seven wiring failures occur, the output NERR
will be made LOW. On error recovery, NERR will be made
HIGH again.
During all single-wire transmissions, the EMC
performance (both immunity and emission) is worse than
in the differential mode. Integrated receiver filters
suppress any HF noise induced into the bus wires.
The cut-off frequency of these filters is a compromise
between propagation delay and HF suppression. In the
single-wire mode, low frequency noise cannot be
distinguished from the required signal.
Low power modes
The transceiver provides 3 low power modes which can be
entered and exited via pins STB and EN.
The sleep mode is the mode with the lowest power
consumption. The INH pin is switched to high-impedance
for deactivation of external voltage regulators. CANL is
biased to the battery voltage via the RTL output. If the
supply voltage is provided the RXD and NERR will signal
the wake-up interrupt
The V
BAT
standby mode will react the same as the sleep
mode with an active INH output.
The V
CC
standby mode is the V
BAT
standby with RTL
switched to the V
CC
voltage. In this mode the NERR output
signals the V
BAT
power-on flag and the RXD output will
show the wake-up interrupt.
Wake-up requests are recognized by the transceiver when
a dominant signal is detected on either bus line or if the
WAKE pin is connected to ground. On a wake-up request
the transceiver will set the INH output which can be used
to activate the external V
CC
voltage regulator. If V
CC
is
provided the wake-up request can be read on the NERR or
RXD outputs, on which the external microcontroller can
wake up the transceiver (switch to normal operating mode)
via STB and EN.
1997 Oct 28
6
Philips Semiconductors
Product specification
Fault-tolerant CAN transceiver
PCA82C252
To prevent false wake-up due to transients or RF fields,
wake-up voltage threshold levels have to be maintained
for a certain period of time. In the low power modes the
failure detection circuit remains partly active to prevent
increased power consumption should errors 3, 4 and 7
occur.
Power on
After power-on V
BAT
is switched on, the INH pin will
become HIGH and an internal power-on flag will be set.
This flag can be read via the NERR pin (STB = 1, EN = 0)
and will be reset by entering the normal operation mode.
The EN and STB pins will internally be set to LOW level, if
the V
CC
voltage is below a certain threshold level, to
provide fail safe functionality.
Protections
A current limiting circuit protects the transmitter output
stages against short-circuit to positive and negative
battery voltage.
If the junction temperature exceeds a maximum value, the
transmitter output stages are disabled. Because the
transmitter is responsible for the major part of the power
dissipation, this will result in a reduced power dissipation
and hence a lower chip temperature. All other parts of the
IC will remain operating.
The CANH and CANL inputs are protected against
electrical transients which may occur in an automotive
environment.
Table 1
Truth table of CAN transceiver
Notes
1. Wake-up interrupts are released when entering normal operating mode.
2. If go to sleep command was used before (EN may turn LOW as V
CC
drops, without affecting internal functions
because of fail safe functionality).
3. V
BAT
power-on flag will be reset when entering normal operation mode.
STB
EN
MODE
INH
NERR
RXD
RTL
0
0
V
BAT
standby
(1)
HIGH
LOW active wake-up interrupt signal if V
CC
is present switched to V
BAT
0
0
sleep
(2)
floating
switched to V
BAT
0
1
go to sleep command
floating
switched to V
BAT
1
0
V
CC
standby
(3)
HIGH
LOW active V
BAT
power-on flag
LOW active wake-up
interrupt
switched to V
CC
1
1
normal operation mode
HIGH
LOW active error flag
HIGH = receive;
LOW = dominant
received data
switched to V
CC
1997 Oct 28
7
Philips Semiconductors
Product specification
Fault-tolerant CAN transceiver
PCA82C252
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
Notes
1. Junction temperature in accordance with IEC 747-1. An alternative definition is: T
vj
= T
amb
+ PD
R
th vj-a
.
Where; R
th vj-a
is a fixed value to be used for the calculation of T
vj
. The rating for T
vj
limits the allowable combinations
of power dissipation and ambient temperature.
2. Human body model: equivalent to discharging a 100 pF capacitor through a 1.5 k
resistor.
3. Machine model: equivalent to discharging a 200 pF capacitor through a 25
resistor.
THERMAL CHARACTERISTICS
QUALITY SPECIFICATION
Quality specification in accordance with
"SNW-FQ-611-Part-E".
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
V
CC
supply voltage
-
0.3
+6.0
V
V
DD
DC input voltage at pins 2 to 6
-
0.3
V
CC
+ 0.3
V
V
BUS
DC input voltage at pins 11 and 12
-
10
+27
V
V
CANH,L
DC input voltage at pins 11 and 12
V
CC
= 0 to 5.5 V;
V
BAT
0 V; t < 0.1 ms;
load dump
-
40
+40
V
V
tr
transient voltage at pins 11 and 12
see Fig.6
-
150
+100
V
V
WAKE
DC input voltage on pin 7
-
V
BAT
+ 0.3 V
I
WAKE
input current pin 7
-
15
-
mA
V
1,8,9
DC input voltage on pins 1, 8 and 9
-
0.3
V
BAT
+ 0.3 V
V
BAT
DC input voltage on pin 14
-
0.3
+27
V
voltage on pin 14
load dump; 500 ms
-
40
V
R
8,9
termination resistances pins 8 and 9
500
16000
T
vj
virtual junction temperature
note 1
-
40
+150
C
T
stg
storage temperature
-
55
+150
C
V
esd
electrostatic discharge voltage at any pin
note 2
-
2000
+2000
V
note 3
-
200
+200
V
SYMBOL
PARAMETER
CONDITIONS
VALUE
UNIT
R
th vj-a
thermal resistance from junction to ambient
in free air
120
K/W
1997 Oct 28
8
Philips Semiconductors
Product specification
Fault-tolerant CAN transceiver
PCA82C252
CHARACTERISTICS
V
CC
= 4.75 to 5.25 V; V
STB
= V
CC
; V
BAT
= 6 V to 27 V; T
amb
=
-
40 to +125
C; unless otherwise specified. All voltages
are defined with respect to ground. Positive currents flow into the IC. All parameters are guaranteed over the
temperature range by design, but only 100% tested at 25
C.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supplies
I
CC
supply current
recessive; TXD = V
CC
;
normal operating mode
-
6
10
mA
dominant; TXD = 0 V; no load;
normal operating mode
-
29
35
mA
I
CC
+ I
BAT
supply current (V
CC
standby)
V
CC
= 5 V; V
BAT
= 12 V;
T
amb
< 90
C
-
120
1000
A
supply current (V
BAT
standby)
V
CC
= 5 V; V
BAT
= 12 V;
T
amb
< 90
C
-
55
80
A
I
BAT
supply current (sleep mode)
V
CC
= 0 V; V
BAT
= 12 V;
T
amb
< 90
C
-
50
75
A
V
BAT
battery voltage for setting
power-on flag
low power modes
-
-
1.0
V
t
pwon
battery voltage low time for
setting power-on flag
low power modes
1
-
-
s
Pins STB, EN and TXD
V
IH
HIGH level input voltage
0.7V
CC
-
V
CC
+ 0.3 V
V
IL
LOW level input voltage
-
0.3
-
0.3V
CC
V
I
IH
HIGH level input current
(pins STB and EN)
V
i
= 4 V
-
9
20
A
I
IL
LOW level input current
(pins STB and EN)
V
i
= 1 V
4
8
-
A
I
IH
HIGH level input current
(pin TXD)
V
i
= 4 V
-
25
-
80
-
200
A
I
IL
LOW level input current
(pin TXD)
V
i
= 1 V
-
100
-
320
-
800
A
V
CC
forced battery voltage standby
mode (fail safe)
2.75
-
4.5
V
Pins RXD and NERR
V
OH
HIGH level output voltage
(pin NERR)
I
o
=
-
100
A
V
CC
-
0.9
-
V
CC
V
V
OH
HIGH level output voltage
(pin RXD)
I
o
=
-
250
A
V
CC
-
0.9
-
V
CC
V
V
OL
LOW level output voltage
I
o
= 1.25 mA
0
-
0.9
V
Pin WAKE
I
IL
LOW level input current
V
WAKE
= 0 V; V
BAT
= 27 V
-
10
-
120
-
250
A
V
wu(th)
wake-up threshold voltage
V
STB
= 0 V
1.2
-
3.2
V
1997 Oct 28
9
Philips Semiconductors
Product specification
Fault-tolerant CAN transceiver
PCA82C252
Pin INH
V
dropH
HIGH level voltage drop
I
INH
=
-
0.18 mA; V
BAT
< 16 V
-
-
0.8
V
I
INH
=
-
0.18 mA; V
BAT
> 16 V
-
-
1.0
V
I
LI
leakage current
sleep mode; V
INH
= 0 V
-
-
5.0
A
Pins CANH and CANL
V
drx(rd)
differential receiver
recessive-to-dominant
threshold voltage
-
3.25
-
-
2.65
V
V
drx(dr)
differential receiver
dominant-to-recessive
threshold voltage
no bus failures
0.4
0.7
1.0
V
bus failures 1, 2 and 5
-
3.25
-
-
2.65
V
V
oCANHrec
CANH recessive output voltage
TXD = V
CC
; R
RTH
< 4 k
-
-
0.2
V
V
oCANLrec
CANL recessive output voltage
TXD = V
CC
; R
RTL
< 4 k
V
CC
-
0.2
-
-
V
V
oCANHdom
CANH dominant output voltage
TXD = 0 V; V
6
= V
CC
;
I
CANH
=
-
40 mA
V
CC
-
1.4
-
-
V
V
oCANLdom
CANL dominant output voltage
TXD = 0 V; V
6
= V
CC
;
I
CANL
= 40 mA
-
-
1.4
V
I
oCANH
CANH output current
V
CANH
= 0 V; TXD = 0 V
-
-
75
-
100
mA
sleep mode; V
CANH
= 12 V
-
0
-
A
I
oCANL
CANL output current
V
CANL
= 14 V; TXD = 0 V
-
90
130
mA
sleep mode; V
CANL
= 0 V,
V
BAT
= 12 V
-
0
-
A
V
detth
voltage detection threshold for
short-circuit to battery voltage
on CANH and CANL
normal mode
6.5
7.3
8.0
V
V
detth
voltage detection threshold for
short-circuit to battery voltage
on CANH
standby/sleep mode
V
BAT
-
2.5
-
V
BAT
-
1
V
V
wuL
CANL wake-up voltage
threshold
2.4
3.1
3.8
V
V
wuH
CANH wake-up voltage
threshold
1.2
1.9
2.7
V
V
wu
wake-up voltage threshold
difference
0.2
-
-
V
V
CANH
CANH single-ended receiver
threshold
failures 4, 6 and 7
1.5
1.82
2.15
V
V
CANL
CANL single-ended receiver
threshold voltage
failure 3
2.8
3.1
3.4
V
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
1997 Oct 28
10
Philips Semiconductors
Product specification
Fault-tolerant CAN transceiver
PCA82C252
AC CHARACTERISTICS
V
CC
= 4.75 to 5.25 V; V
STB
= V
CC
; V
BAT
= 6 V to 27 V; T
amb
=
-
40 to +125
C; unless otherwise specified. All voltages
are defined with respect to ground. Positive currents flow into the IC. All parameters are guaranteed over the
temperature range by design, but only 100% tested at 25
C.
Pins RTH and RTL
R
RTL
RTL to V
CC
switch-on resistance
I
o
< 10 mA;
normal operating mode
-
7
25
I
o
< 1 mA; V
CC
standby mode
-
15
75
RTL to BAT switch series
resistance
V
BAT
standby or sleep mode
10
16
28
k
R
RTH
RTH to ground switch-on
resistance
I
o
< 10 mA;
normal operating mode
-
43
95
V
oRTH
RTH output voltage
I
o
= 1 mA; low power modes
-
0.7
1.0
V
I
RTLpu
RTL pull-up current
normal operating mode,
failures 4, 6 and 7
-
75
-
A
I
RTHpd
RTH pull-down current
normal operating mode,
failure 3
-
75
-
A
Thermal shutdown
T
jsd
shut down junction temperature
155
165
180
C
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
t
rd
CANL and CANH bus output
transition time
recessive-to-dominant
10% to 90%; C1 = 10 nF;
C2 = 0; R1 = 100
0.6
0.85
-
s
t
dr
CANL and CANH bus output
transition time
dominant-to-recessive
10% to 90%; C1 = 1 nF;
C2 = 0; R1 = 100
0.3
0.4
-
s
t
PD(L)
propagation delay TXD-to-RXD
LOW
C1 = 100 pF; C2 = 0;
R1 = 100
; no failures and
bus failures 1, 2 and 5
-
0.75
1.25
s
C1 = C2 = 3.3 nF;
R1 = 100
; no failures and
bus failures 1, 2 and 5
-
1
1.5
s
C1 = 100 pF; C2 = 0;
R1 = 100
;
bus failures 3, 4, 6 and 7
-
0.85
1.3
s
C1 = C2 = 3.3 nF; R1 = 100
;
bus failures 3, 4, 6 and 7
-
1.1
1.7
s
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
1997 Oct 28
11
Philips Semiconductors
Product specification
Fault-tolerant CAN transceiver
PCA82C252
t
PD(H)
propagation delay TXD-to-RXD
HIGH
C1 = 100 pF; C2 = 0;
R
l
= 100
; no failures and bus
failures 1, 2 and 5
-
0.75
1.25
s
C1 = C2 = 3.3 nF; R
l
= 100
;
no failures and bus failures
1 and 2
-
1
1.5
s
C1 = 100 pF; C2 = 0;
R1 = 100
;
bus failures 3, 4, 6 and 7
-
0.85
1.3
s
C1 = C2 = 3.3 nF; R1 = 100
;
bus failures 3, 4, 5, 6 and 7
-
1.4
2.1
s
t
wo(min)
minimum dominant time for
wake-up on CANL or CANH
low power modes V
BAT
= 12 V
8
-
38
s
t
WAKE(min)
minimum WAKE LOW time for
wake-up
low power modes V
BAT
= 12 V
8
-
38
s
t
fail
failures 3 and 6 detection time
normal mode
10
-
60
s
failure 3 recovery time
normal mode
10
-
60
s
failure 6 recovery time
normal mode
150
-
750
s
failures 4 and 7 detection time
normal mode
0.75
-
4.0
ms
failures 4 and 7 recovery time
normal mode
10
-
60
s
failures 3, 4 and 7 detection time low power modes; V
BAT
= 12 V 0.8
-
8.0
ms
failures 3, 4 and 7 recovery time low power modes; V
BAT
= 12 V
-
4
-
ms
t
h(min)
minimum hold time to go to
sleep command
5
-
50
s
ec
edge-count difference between
CANH and CANL for failures 1,
2 and 5 detection (NERR
becomes LOW)
normal mode
-
3
-
edge-count difference between
CANH and CANL for failures 1,
2 and 5 recovery
normal mode
-
1
-
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
1997 Oct 28
12
Philips Semiconductors
Product specification
Fault-tolerant CAN transceiver
PCA82C252
TEST AND APPLICATION INFORMATION
Fig.3 Test circuit for dynamic characteristics.
For testing, the 100
termination resistors are not connected to RTH or RTL because a minimum 500
per transceiver is allowed.
The capacitive bus load of 10 nF is split up into 3 capacitors to simulate the cable.
dbook, full pagewidth
MBH550
20 pF
RXD
EN
STB
TXD
WAKE
7
2
5
6
3
INH
BAT
VCC
1
14
+
12 V
10
GND
NERR
13
4
RTL
RTH
8
9
CANL
12
CANH
11
+
5 V
R1
C1
C2
R1
C1
PCA82C252
Fig.4 Timing diagram for dynamic characteristics.
andbook, full pagewidth
MBH549
-
5 V
-
2.9 V
0.7 V
2.2 V
0.7VCC
0.3VCC
0 V
5 V
1.4 V
3.6 V
0 V
VCC
VTXD
VCANL
VCANH
Vdiff
VRXD
tPD(L)
tPD(H)
V
diff
= V
CANH
-
V
CANL
1997 Oct 28
13
Philips Semiconductors
Product specification
Fault-tolerant CAN transceiver
PCA82C252
Fig.5 Application of the PCA82C252.
handbook, full pagewidth
MBH552
100 nF
TXD
RXD
STB
NERR
EN
INH
2
7
3
5
4
6
1
PCA82C252
CAN TRANSCEIVER
BAT
VCC
GND
14
10
13
WAKE
P8xC292/P8xCE598
CAN CONTROLLER
CTX0
CRXO
8
11
12
9
RTL
CANL
CANH
RTH
CAN BUS LINE
+
5 V
+
5 V
BATTERY
VBAT
Fig.6 Test circuit for automotive transients.
The waveforms of the applied transients will be in accordance with ISO 7637 part 1, test pulses 1, 2, 3a and 3b.
handbook, full pagewidth
MBH551
20 pF
RXD
EN
STB
TXD
WAKE
7
2
5
6
3
INH
BAT
VCC
1
14
10
GND
NERR
13
4
RTL
RTH
8
9
CANL
12
CANH
11
+
5 V
+
12 V
1 nF
GENERATOR
1 nF
100
100
PCA82C252
1997 Oct 28
14
Philips Semiconductors
Product specification
Fault-tolerant CAN transceiver
PCA82C252
PACKAGE OUTLINE
UNIT
A
max.
A
1
A
2
A
3
b
p
c
D
(1)
E
(1)
(1)
e
H
E
L
L
p
Q
Z
y
w
v
REFERENCES
OUTLINE
VERSION
EUROPEAN
PROJECTION
ISSUE DATE
IEC
JEDEC
EIAJ
mm
inches
1.75
0.25
0.10
1.45
1.25
0.25
0.49
0.36
0.25
0.19
8.75
8.55
4.0
3.8
1.27
6.2
5.8
0.7
0.6
0.7
0.3
8
0
o
o
0.25
0.1
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
Note
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
1.0
0.4
SOT108-1
X
w
M
A
A
1
A
2
b
p
D
H
E
L
p
Q
detail X
E
Z
e
c
L
v
M
A
(A )
3
A
7
8
1
14
y
076E06S
MS-012AB
pin 1 index
0.069
0.010
0.004
0.057
0.049
0.01
0.019
0.014
0.0100
0.0075
0.35
0.34
0.16
0.15
0.050
1.05
0.041
0.244
0.228
0.028
0.024
0.028
0.012
0.01
0.25
0.01
0.004
0.039
0.016
95-01-23
97-05-22
0
2.5
5 mm
scale
SO14: plastic small outline package; 14 leads; body width 3.9 mm
SOT108-1
1997 Oct 28
15
Philips Semiconductors
Product specification
Fault-tolerant CAN transceiver
PCA82C252
SOLDERING
Introduction
There is no soldering method that is ideal for all IC
packages. Wave soldering is often preferred when
through-hole and surface mounted components are mixed
on one printed-circuit board. However, wave soldering is
not always suitable for surface mounted ICs, or for
printed-circuits with high population densities. In these
situations reflow soldering is often used.
This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
our
"IC Package Databook" (order code 9398 652 90011).
Reflow soldering
Reflow soldering techniques are suitable for all SO
packages.
Reflow soldering requires solder paste (a suspension of
fine solder particles, flux and binding agent) to be applied
to the printed-circuit board by screen printing, stencilling or
pressure-syringe dispensing before package placement.
Several techniques exist for reflowing; for example,
thermal conduction by heated belt. Dwell times vary
between 50 and 300 seconds depending on heating
method. Typical reflow temperatures range from
215 to 250
C.
Preheating is necessary to dry the paste and evaporate
the binding agent. Preheating duration: 45 minutes at
45
C.
Wave soldering
Wave soldering techniques can be used for all SO
packages if the following conditions are observed:
A double-wave (a turbulent wave with high upward
pressure followed by a smooth laminar wave) soldering
technique should be used.
The longitudinal axis of the package footprint must be
parallel to the solder flow.
The package footprint must incorporate solder thieves at
the downstream end.
During placement and before soldering, the package must
be fixed with a droplet of adhesive. The adhesive can be
applied by screen printing, pin transfer or syringe
dispensing. The package can be soldered after the
adhesive is cured.
Maximum permissible solder temperature is 260
C, and
maximum duration of package immersion in solder is
10 seconds, if cooled to less than 150
C within
6 seconds. Typical dwell time is 4 seconds at 250
C.
A mildly-activated flux will eliminate the need for removal
of corrosive residues in most applications.
Repairing soldered joints
Fix the component by first soldering two diagonally-
opposite end leads. Use only a low voltage soldering iron
(less than 24 V) applied to the flat part of the lead. Contact
time must be limited to 10 seconds at up to 300
C. When
using a dedicated tool, all other leads can be soldered in
one operation within 2 to 5 seconds between
270 and 320
C.
1997 Oct 28
16
Philips Semiconductors
Product specification
Fault-tolerant CAN transceiver
PCA82C252
DEFINITIONS
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
Data sheet status
Objective specification
This data sheet contains target or goal specifications for product development.
Preliminary specification
This data sheet contains preliminary data; supplementary data may be published later.
Product specification
This data sheet contains final product specifications.
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
1997 Oct 28
17
Philips Semiconductors
Product specification
Fault-tolerant CAN transceiver
PCA82C252
NOTES
1997 Oct 28
18
Philips Semiconductors
Product specification
Fault-tolerant CAN transceiver
PCA82C252
NOTES
1997 Oct 28
19
Philips Semiconductors
Product specification
Fault-tolerant CAN transceiver
PCA82C252
NOTES
Internet: http://www.semiconductors.philips.com
Philips Semiconductors a worldwide company
Philips Electronics N.V. 1997
SCA55
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Printed in The Netherlands
897027/00/04/pp20
Date of release: 1997 Oct 28
Document order number:
9397 750 02969