TL7702B, TL7705B, TL7733B
SUPPLY-VOLTAGE SUPERVISORS
SLVS037L SEPTEMBER 1989 REVISED MAY 2002
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D
Power-On Reset Generator
D
Automatic Reset Generation After
Voltage Drop
D
RESET Output Defined From V
CC
1 V
D
Precision Voltage Sensor
D
Temperature-Compensated Voltage
Reference
D
True and Complement Reset Outputs
D
Externally Adjustable Pulse Duration
description
The TL7702B, TL7705B, and TL7733B are
integrated-circuit supply-voltage supervisors
designed for use as reset controllers in
microcomputer and microprocessor systems. The
supply-voltage supervisor monitors the supply for
undervoltage conditions at the SENSE input.
During power up, the RESET output becomes
active (low) when V
CC
attains a value
approaching 1 V. As V
CC
approaches 3 V
(assuming that SENSE is above V
T+
), the delay
timer function activates a time delay, after which
outputs RESET and RESET go inactive (high and
low, respectively). When an undervoltage
condition occurs during normal operation, outputs
RESET and RESET go active. To ensure that a
complete reset occurs, the reset outputs remain
active for a time delay after the voltage at the
SENSE input exceeds the positive-going
threshold value. The time delay is determined by
the value of the external capacitor C
T
:
t
d
2.6
10
4
C
T
, where C
T
is in farads (F) and
t
d
is in seconds (s).
An external capacitor (typically 0.1
F) must be
connected to REF to reduce the influence of fast
transients in the supply voltage.
The TL7702BC, TL7705BC, and TL7733BC are characterized for operation from 0
C to 70
C. The TL7702BI,
TL7705BI, and TL7733BI are characterized for operation from 40
C to 85
C. The TL7705BQ is characterized
for operation from 40
C to 125
C. The TL7705BM is characterized for operation from 55
C to 125
C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright
2002, Texas Instruments Incorporated
3
2 1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
NC
SENSE
NC
RESET
NC
NC
RESIN
NC
CT
NC
TL7705BM . . . FK PACKAGE
(TOP VIEW)
NC
REF
NC
RESET
NC
V
NC
NC
GND
NC
CC
1
2
3
4
8
7
6
5
REF
RESIN
CT
GND
V
CC
SENSE
RESET
RESET
TL77xxBC . . . D OR P PACKAGE
TL7705BM . . . JG PACKAGE
TL7705BQ . . . D PACKAGE
(TOP VIEW)
1
2
3
4
5
10
9
8
7
6
NC
REF
RESIN
CT
GND
NC
V
CC
SENSE
RESET
RESET
TL7705BM . . . U PACKAGE
(TOP VIEW)
NC No internal connection
NC No internal connection
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
TL7702B, TL7705B, TL7733B
SUPPLY-VOLTAGE SUPERVISORS
SLVS037L SEPTEMBER 1989 REVISED MAY 2002
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
AVAILABLE OPTIONS
PACKAGED DEVICES
TA
SMALL
OUTLINE
(D)
CHIP
CARRIER
(FK)
CERAMIC
DIP
(JG)
PLASTIC
DIP
(P)
CERAMIC
FLATPACK
(U)
TL7702BCD
--
--
TL7702BCP
--
0
C to 70
C
TL7705BCD
--
--
TL7705BCP
--
TL7733BCD
--
--
TL7733BCP
--
TL7702BID
--
--
TL7702BIP
--
40
C to 85
C
TL7705BID
--
--
TL7705BIP
--
TL7733BID
--
--
TL7733BIP
--
40
C to 125
C
TL7705BQD
--
--
--
--
55
C to 125
C
--
TL7705BMFK
TL7705BMJG
--
TL7705BMU
The D package is available taped and reeled. Add the suffix R to device type (e.g., TL7702BCDR).
functional block diagram
The functional block diagram is shown for illustrative purposes only; the actual circuit includes a trimming
network to adjust the reference voltage and sense-comparator trip point.
RESIN
70
A
R1
(see Note A)
R2
(see Note A)
Reference
Voltage 1
SENSE
GND
VCC
CT
RESET
RESET
REF
8
3
7
2
4
6
5
1
Pin numbers shown are for the D, JG, and P packages.
NOTE A: TL7702B: R1 = 0
, R2 = open, Vx = VREF1
TL7705B: R1 = 23 k
, R2 = 10 k
, nominal, Vx
1.43 V
TL7733B: R1 = 11.3 k
, R2 = 10 k
, nominal, Vx
1.43 V
Reference
Voltage 2
Vx
TL7702B, TL7705B, TL7733B
SUPPLY-VOLTAGE SUPERVISORS
SLVS037L SEPTEMBER 1989 REVISED MAY 2002
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
typical timing diagram
VIT
RESET
Vres
0
td
0
VCC and
SENSE
td
VIT
VIT+
VIT+
Vres
Output
Undefined
Output
Undefined
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
CC
(see Note 1)
20 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, V
I
: RESIN
0.3 V to 20 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SENSE
0.3 V to 20 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High-level output current, I
OH
(RESET)
30 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low-level output current, I
OL
(RESET) 30
mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance,
JA
(see Notes 2 and 3): D package
97
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
P package
85
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Case temperature for 60 seconds, T
C
: FK package
260
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: JG or U packages
300
C
. . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D or P packages
260
C
. . . . . . . . . . . . . . . .
Storage temperature range, T
stg
65
C to 150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES:
1. All voltage values are with respect to the network ground terminal.
2. Maximum power dissipation is a function of TJ(max),
JA, and TA. The maximum allowable power dissipation at any allowable
ambient temperature is PD = (TJ(max) TA)/
JA. Operating at the absolute maximum TJ of 150
C can affect reliability.
3. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions
MIN
MAX
UNIT
VCC
Supply voltage
3.6
18
V
VIH
High-level input voltage
RESIN
2
18
V
VIL
Low-level input voltage
RESIN
0
0.8
V
VI
Input voltage
SENSE
0
18
V
IOH
High-level output current
RESET
20
mA
IOL
Low-level output current
RESET
20
mA
TL77xxBC
0
70
TA
Operating free-air temperature range
TL77xxBI
40
85
C
TA
O erating free-air tem erature range
TL7705BQ
40
125
C
TL7705BM
55
125
TL7702B, TL7705B, TL7733B
SUPPLY-VOLTAGE SUPERVISORS
SLVS037L SEPTEMBER 1989 REVISED MAY 2002
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating conditions (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TL77xxBC
TL77xxBI
TL7705BQ
UNIT
MIN
TYP
MAX
VOH
High-level output voltage, RESET
IOH = 16 mA
VCC1.5
V
VOL
Low-level output voltage, RESET
IOL = 16 mA
0.4
V
Vref
Reference voltage, REF
Iref = 500
A,
TA = 25
C
2.48
2.53
2.58
V
TL7702B
2.505
2.53
2.555
TL7705B
TA = 25
C
4.5
4.55
4.6
VIT
Negative-going
input threshold voltage
TL7733B
3.03
3.08
3.13
V
VIT
input threshold voltage
at SENSE input
TL7702B
2.48
2.53
2.58
V
at SENSE in ut
TL7705B
TA = full range
4.45
4.55
4.65
TL7733B
A
g
3
3.08
3.16
H
t
i
SENSE
TL7702B
10
Vhys
Hysteresis, SENSE
(VIT+ VIT )
TL7705B
VCC = 3.6 V to 18 V,
TA = 25
C
30
mV
y
(VIT+ VIT)
TL7733B
10
Vres
Power-up reset voltage
IOL at RESET = 2 mA,
TA = 25
C
1
V
II
Input current
RESIN
VI = 0.4 V to VCC
10
A
II
Input current
SENSE
TL7702B
VI = Vref to 18 V
0.1
2
A
IOH
High-level output current, RESET
VO = 18 V,
See Figure 1
50
A
IOL
Low-level output current, RESET
VO = 0 V,
See Figure 1
50
A
ICC
Supply current
VSENSE = 15 V,
RESIN
2 V
1.8
3
mA
ICC
Supply current
VCC = 18 V,
TA = full range
3.5
mA
All electrical characteristics are measured with 0.1-
F capacitors connected at REF, CT, and VCC to GND.
Full range is 0
C to 70
C for the C-suffix devices, 40
C to 85
C for the I-suffix devices, and 40
C to 125
C for the Q-suffix device.
This is the lowest voltage at which RESET becomes active.
switching characteristics, V
CC
= 5 V, C
T
open, T
A
= 25
C
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
TEST CONDITIONS
TL77xxBC
TL77xxBI
TL7705BQ
UNIT
(
)
(
)
MIN
TYP
MAX
tPLH
Propagation delay time from
low- to high-level output
RESIN
RESET
See Figures 1, 2, and 3
270
500
ns
tPHL
Propagation delay time from
high- to low-level output
RESIN
RESET
See Figures 1, 2, and 3
270
500
ns
t
Effective pulse duration
RESIN
See Figure 2
150
ns
tw
Effective pulse duration
SENSE
See Figure 2
100
ns
tr
Rise time
RESET
See Figures 1 and 3
75
ns
tf
Fall time
RESET
See Figures 1 and 3
150
200
ns
tr
Rise time
RESET
See Figures 1 and 3
75
150
ns
tf
Fall time
RESET
See Figures 1 and 3
50
ns
TL7702B, TL7705B, TL7733B
SUPPLY-VOLTAGE SUPERVISORS
SLVS037L SEPTEMBER 1989 REVISED MAY 2002
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating conditions (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TL7705BM
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VOH
High-level output voltage, RESET
IOH = 16 mA
VCC1.5
V
VOL
Low-level output voltage, RESET
IOL = 16 mA
0.4
V
Vref
Reference voltage, REF
Iref = 500
A,
TA = 25
C
2.48
2.53
2.58
V
TL7702B
TA = 25
C
2.505
2.53
2.555
VIT
Negative-going
input threshold voltage
TL7705B
TA = 25
C
4.5
4.55
4.6
V
VIT
input threshold voltage
at SENSE input
TL7702B
T
55
C to 125
C
2.48
2.53
2.58
V
at SENSE in ut
TL7705B
TA = 55
C to 125
C
4.45
4.55
4.65
Vh
Hysteresis, SENSE
TL7702B
VCC = 3 6 V to 18 V
TA = 25
C
10
mV
Vhys
y
,
(VIT+ VIT)
TL7705B
VCC = 3.6 V to 18 V,
TA = 25
C
30
mV
Vres
Power-up reset voltage
IOL at RESET = 2 mA, TA = 25
C
1
V
II
Input current
RESIN
VI = 0.4 V to VCC
10
A
II
Input current
SENSE
TL7702B
VI = Vref to VCC 1.5 V
0.1
2
A
IOH
High-level output current, RESET
VO = 18 V
50
A
IOL
Low-level output current, RESET
VO = 0
50
A
ICC
Supply current
VSENSE = 15 V,
RESIN
2 V
1.8
3
mA
ICC
Supply current
VCC = 18 V,
TA = 55
C to 125
C
4
mA
All electrical characteristics are measured with 0.1-
F capacitors connected at REF, CT, and VCC to GND.
This is the lowest value at which RESET becomes active.
switching characteristics, V
CC
= 5 V, C
T
open, T
A
= 25
C
PARAMETER
FROM
TO
TEST CONDITIONS
TL7705BM
UNIT
PARAMETER
(INPUT)
(OUTPUT)
TEST CONDITIONS
MIN
TYP
MAX
UNIT
tPLH
Propagation delay time from
low- to high-level output
RESIN
RESET
See Figures 1, 2, and 3
270
500*
ns
tPHL
Propagation delay time from
high- to low-level output
RESIN
RESET
See Figures 1, 2, and 3
270
500*
ns
t
Effective pulse duration
RESIN
See Figure 2
150
ns
tw
Effective pulse duration
SENSE
See Figure 2
100
ns
tr
Rise time
RESET
See Figures 1 and 3
75*
ns
tf
Fall time
RESET
See Figures 1 and 3
150
200*
ns
tr
Rise time
RESET
See Figures 1 and 3
75
150*
ns
tf
Fall time
RESET
See Figures 1 and 3
50*
ns
* On products compliant to MIL-PRF-38535, these parameters are not production tested.
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