eroflex Circuit T
echnology
Data Bus Modules For The Future SCDCT2542 REV C 8/11/98
Features
Replaces DDC BUS-65142 and BUS-65143
Functions as a Complete Remote Terminal Unit
Supports 13 Mode Codes, Illegalization of Codes Allowed
Transfers Data with DMA Type Handshaking
Latched Outputs for Command Word and Word Count
14 Bit Built-ln-Test Word Register
4 Error Flag Outputs
Advanced Low Power VLSI Technology
DESC SMD# 596289798 Approved
General Description
The CT2542 contains 2 transceivers, 2 encoder/decoders, bit processors and complete Remote Terminal (RT)
logic. The device is constructed using Aeroflex advanced VLSI custom chip and hybrid technology. It
functions as a complete dual redundant MIL-STD-1553B RT Unit supporting all 13 mode codes for dual
redundant operation. The CT2542 is a pin-for-pin functional equivalent of the DDC BUS-65142/143 and
performs parallel data transfers with a DMA type handshake. Multiple error flag outputs and host access to
many of the RT Status Word bits are just some of the features that make this part ideal for many RT
applications. The unit has an operating range of -55C to + 125C. Aeroflex is a MIL-PRF-38534 Certified
Manufacturer.
Figure 1 Functional Block Diagram
DB0-DB15
A0-A11
ERROR FLAG
TIMING FLAGS
STATUS BITS
I/O
INTERFACE
MIL-STD-1553B
PROTOCOL
AND
BIT
PROCESSING
LOGIC
ENCODER/
DECODER
ENCODER/
DECODER
DUAL
TRANSCEIVER
DATA BUS A
DATA BUS B
CT 2542
Dual Redundant Remote Terminal
FOR MIL-STD-1553B
CIRCUIT TECHNOLOGY
www.aeroflex.com
F
I
E
I
D
C
E
R T
A
E
R
O
F
L E
X L A
B
S
I
N
C
.
ISO
9001
Aeroflex Circuit Technology
SCDCT2542 REV C 8/11/98 Plainview NY (516) 694-6700
2
Absolute Maximum Ratings
Parameter
Limits
Units
Power Supply Voltage (V
EE
)
+0.3 to -18.0
Volts
Power Supply Voltage (V
CCL
)
-0.3 to +7.0
Volts
Receiver Differential Input
20 (40Vp-p)
Volts
Receiver Input Voltage
15
Volts
Driver Output Current
+200
mA
Transmission Duty Cycle at T
C
= 125C
100
%
Operating Case Temperature Range (T
C
)
-55 to +125
C
Power and Thermal Data (Transceiver and Logic Section)
Parameter/Conditions
Symbol
Min
Typ
Max
Units
Power Supply Voltage
V
EE
V
CCL
-14.25
4.5
-15
5
-15.75
5.5
V
V
Power Dissipation of most critical (hottest) device in
hybrid during continuous transmission (100% Duty
Cycle)
P
C
350
mW
Note 1
Thermal Resistance, most critical device
JC
60
C/W
Junction to case temperature rise of most critical device
at 100% duty cycle
T
JC
60
80
C
Total supply current standby mode, or transmitting at
less than 1% duty cycle (e.g. 20us of transmission
every 2ms or longer interval)
I
CCL
I
EE
50
50
70
mA
mA
Note 2
Total supply curren transmitting at 1Mhz into a 35-ohm
load at point A in Figure 2
I
EE
@ 50%
I
EE
@ 100%
175
270
mA
Note 3
mA
Note 3
Note 1: Decreases linearly to zero at zero duty cycle.
Note 2: I
CCL
limit does not change with mode of operation or duty cycle.
Note 3: Decreases linearly to applicable "standby" values at zero duty cycle.
Aeroflex Circuit Technology
SCDCT2542 REV C 8/11/98 Plainview NY (516) 694-6700
3
Electrical Characteristics (Receiver Section)
Parameter/Conditions
Symbol
Min
Typ
Max
Units
Differential input impedance
DC to 1MHz, Point B, Figure 1
Z
IN
2K
Differential voltage range
V
DIR
20V
Vpeak
Input common mode voltage
range
V
ICR
10V
Vpeak
Common mode rejection ratio
(from point A, Figure 1)
CMMR
40
dB
Threshold characteristics
(Sine wave at 1MHz)
Note: Threshold voltages refer to point A, Figure 1.
V
th
0.6
1.2
Vp-p
Electrical Characteristics (Transmitter Section)
Parameter/Conditions
Symbol
Min
Typ
Max
Units
Differential output level at point B, Figure 1 (145 ohm load)
V
O
26
35
Vp-p
Rise and Fall times (10% to 90% of p-p output)
T
r
100
300
nS
Output offset at point A in Figure 2 (35-ohm load) 2.5us
after mid-bit crossing of
parity bit of last word of a
660us message
V
OS
20
90
mV Vpeak
Differential output noise
V
NOI
10
mV pp
Aeroflex Circuit Technology
SCDCT2542 REV C 8/11/98 Plainview NY (516) 694-6700
4
Logic Characteristics
Symbol
Parameter
Min
Typ
Max
Units
Conditions
V
IH
Input "1"
2.4
VDC
V
IL
Input "0"
0.7
VDC
I
IL
Input l
-80
-400
A
Note 1A
I
IH
Input l
-40
-200
A
Note 1B
I
IL
Input l
-20
+20
A
Note 2A
I
IH
Input l
-20
+20
A
Note 1B
I
IL
Input l
-20
-200
A
Note 5
I
IH
Input l
-40
-400
A
V
OH
Output "1"
2.7
VDC
Note 3A/4A
V
OL
Output "0"
0.4
VDC
Note 3B/4B
Note 1
For INPUT pins 12,13,14,15, 53, 54, 55.
VCC= 5.5V
A. @ VIL = 0.4V
B. @ VIH = 2.4V
Note 2
All remaining INPUTS other than in Note 1.
VCC= 5.5V
A. @ VIL = 0.4V
B. @ VIH = 2.4V
Note 3
For OUTPUT pins 4 through 11 and 43 through 50.
A. @ VCC = 4.5V and IOH = 2mA
B. @ VCC = 4.5V and IOL = 4mA
Note 4
All remaining OUTPUTS other than in Note 3.
A. @ VCC = 4.5V and IOH = 1mA
B. @ VCC = 4.5V and IOL = 2mA
Note 5
For INPUT pins 4-11, 43-50.
VCC= 5.5V
A. @ VIL = 0.4V
B. @ VIH = 2.4V
Aeroflex Circuit Technology
SCDCT2542 REV C 8/11/98 Plainview NY (516) 694-6700
5
Figure 1 Typical Bus Coupling
1.4 :1
55
NOTES:
55
2 : 1
DATA TX/RX
55
55
1 : 1.41
Transformer Coupled Stubs
Direct Coupled Stubs
C
B
Zoi
V
CMT
= 10 V
PK
Zoi
A
A
1. Point C, Vo = 18 Vpp Minimum
DATA TX/RX
DATA TX/RX
DATA TX/RX
70
35
35
2. Transformer self Impedance
3K
at 1MHz
3. V
CMT
for transformer coupled stubs
V
CMD
for direct coupled stubs
V
CMD
DC to 2MH
Z
STUB
ISOLATION
STUB
+
-
2542
2542
Aeroflex Circuit Technology
SCDCT2542 REV C 8/11/98 Plainview NY (516) 694-6700
6
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Aeroflex Circuit Technology
SCDCT2542 REV C 8/11/98 Plainview NY (516) 694-6700
7
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Aeroflex Circuit Technology
SCDCT2542 REV C 8/11/98 Plainview NY (516) 694-6700
8
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Aeroflex Circuit Technology
SCDCT2542 REV C 8/11/98 Plainview NY (516) 694-6700
9
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(
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B
)
Aeroflex Circuit Technology
SCDCT2542 REV C 8/11/98 Plainview NY (516) 694-6700
10
Figure 6 TIMING DIAGRAM, COMMAND WORD TRANSFER
125ns
0ns MIN
2.1s MAX
100ns MAX
375ns
125ns
635ns
1s
125ns
125ns
WHEN T/R = 0
VALID
SUB ADDRESS
ADDRESS = 00h OR MODE
WORD
COUNT
TRISTATE
TRISTATE
TRISTATE
75ns MAX
75ns MAX
75ns
MAX
75ns MAX
COMMAND WORD
NOTE:
1. R/W = LOGIC 0
BUFFENA
DB0 - DB15
A0 - A4
A6 - A10
A5 (D/C)
A11 (T/R)
INCMD
DTSTB
DTACK
DTGRT
DTREQ
NBGT
Aeroflex Circuit Technology
SCDCT2542 REV C 8/11/98 Plainview NY (516) 694-6700
11
Figure 7 Timing Diagram, Status Word Transfer
TRISTATE
TRISTATE
STATEN
GBR
DTSTB
DB0 - DB15
BUFFENA
Receive Only
375ns
125ns
125ns
75ns
75ns
TRISTATE
TRISTATE
BITEN
DTSTB
DB0 - DB15
BUFFENA
375 ns
125ns
125ns
75ns
75ns
STATUS
BIT WORD
Figure 8 Timing Diagram, Bit Word Transfer
NOTE:
1. R/W = LOGIC 0
NOTE:
1. R/W = LOGIC 0
Aeroflex Circuit Technology
SCDCT2542 REV C 8/11/98 Plainview NY (516) 694-6700
12
375ns TYP
0ns MIN
DON'T CARE
100ns MAX
125ns TYP
125ns TYP
75ns MAX
75ns MAX
50ns MAX
RECEIVED DATA WORD
ADDRESS or MODE
*ADDRESS +1
VALID
TRISTATE
BUFFENA
DB0 - DB15
A0 - A4
DTSTB
DTACK
DTGRT
DTREQ
Figure 9 Timing Diagram, Data to Subsystem
375ns TYP
0ns MIN
DON'T CARE
100ns MAX
125ns TYP
125ns TYP
ADDRESS or MODE
*ADDRESS +1
DB0 - DB15
A0 - A4
DTSTB
DTACK
DTGRT
DTREQ
Figure 10 Timing Diagram, Data from Subsystem
R/W
50ns MIN
50ns MAX
50ns MAX
TRANSMIT DATA WORD VALID
NOTES:
1. R/W = Logic 0
2. (*) = Non-Mode Only
3. BUFFENA = DTACK
NOTES:
1.
(*) = Non-Mode Only
2. Word Count for Mode Code
3. BUFFENA = Don't Care
Aeroflex Circuit Technology
SCDCT2542 REV C 8/11/98 Plainview NY (516) 694-6700
13
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Aeroflex Circuit Technology
SCDCT2542 REV C 8/11/98 Plainview NY (516) 694-6700
14
21
60
22
61
23
62
24
63
25
64
26
65
27
66
28
67
29
68
30
69
31
70
32
71
33
72
34
73
35
74
36
75
37
76
38
77
39
78
40
1
41
2
42
3
43
4
44
5
45
6
46
7
47
8
48
9
49
10
50
11
51
12
52
13
53
14
54
15
55
16
56
17
57
18
58
19
59
20
A10
A9
A8
A7
A6
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB8
DB9
DB10
DB11
DB12
DB13
DB14
DB15
+5V
BRO ENA
GND
ADDRE
ADDRD
ADDRC
ADDRB
ADDRA
ADDRP
RTADERR
TXDATA B
TXDATA B
-V
EE
B
N/C
+5V B
GND B
RXDATA B
RXDATA B
A3
A2
A1
A0
DTGRT
DTACK
INCMD
A4
HSFAIL
R/W
DISTR
GBR
A5(DAT/CMD)
16MHz IN
RTFAIL
BUF ENA
DTREQ
RESET
ADBC
RTFLAG
TP2
TP1
A11(T/R)
BUSY
ILLCMD
SSFLAG
SRQ
ME
BITEN
RXDATA A
RXDATA A
GND A
+5V A
N/C
-V
EE
A
TXDATA A
TXDATA A
STATEN
NBGT
CT2542 Pin Out Description (DDIP)
Pin
#
Function
Pin
#
Function
1
A10
40
NBGT
2
A8
41
A9
3
A6
42
A7
4
DB1
43
DB0
5
DB3
44
DB2
6
DB5
45
DB4
7
DB7
46
DB6
8
DB9
47
DB8
9
DB11
48
DB10
10
DB13
49
DB12
11
DB15
50
DB14
12
BRO ENA
51
+5V
13
ADDRE
52
GND
14
ADDRC
53
ADDRD
15
ADDRA
54
ADDRB
16
RTADERR
55
ADDRP
17
TXDATA B
56
TXDATA B
18
N/C
57
-V
EE
B
19
GND B
58
+5V B
20
RXDATA B
59
RXDATA B
21
A3
60
A2
22
A1
61
A0
23
DTGRT
62
DTACK
24
INCMD
63
A4
25
HSFAIL
64
R/W
26
DTSTR
65
GBR
27
A5 (DAT/CMD)
66
16MHz IN
28
RTFAIL
67
BUF ENA
29
DTREQ
68
RESET
30
ADBC
69
RTFLAG
31
TP2 (NC)
70
TP1 (NC)
32
A11 (T/R)
71
BUSY
33
ILLCMD
72
SSFLAG
34
SRQ
73
ME
35
BITEN
74
RXDATA A
36
RXDATA A
75
GND A
37
+5V A
76
N/C
38
-V
EE
A
77
TXDATA A
39
TXDATA A
78
STATEN
CT2542
MIL-STD-1553B
REMOTE TERMINAL
PROTOCOL UNIT
Figure 12 DDIP Pin Connection Diagram, CT2542 and Pinout Table
Aeroflex Circuit Technology
SCDCT2542 REV C 8/11/98 Plainview NY (516) 694-6700
15
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
A10
A9
A8
A7
A6
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB8
DB9
DB10
DB11
DB12
DB13
DB14
DB15
+5V
BR0 ENA
GND
ADDRE
ADDRD
ADDRC
ADDRB
ADDRA
ADDRP
RTADERR
TXDATA B
TXDATA B
-V
EE
B
N/C
+5V B
GND B
RXDATA B
RXDATA B
A3
A2
A1
A0
DTGRT
DTACK
INCMD
A4
HSFAIL
R/W
DISTR
GBR
A5(DAT/CMD)
16MHz IN
RTFAIL
BUF ENA
DTREQ
RESET
ADBC
RTFLAG
TP2
TP1
A11(T/R)
BUSY
ILLCMD
SSFLAG
SRQ
ME
BITEN
RXDATA A
RXDATA A
GND A
+5V A
N/C
-V
EE
A
TXDATA A
TXDATA A
STATEN
NBGT
CT2542 Pin Out Description (FP)
Pin
#
Function
Pin
#
Function
1
NC
42
NC
2
A10
43
NBGT
3
A9
44
STATEN
4
A8
45
TXDATA A
5
A7
46
TXDATA A
6
A6
47
V
EE
A
7
DB0
48
N/C
8
DB1
49
+5V A
9
DB2
50
GND A
10
DB3
51
RXDATA A
11
DB4
52
RXDATA A
12
DB5
53
BITEN
13
DB6
54
ME
14
DB7
55
SRQ
15
DB8
56
SSFLAG
16
DB9
57
ILLCMD
17
DB10
58
BUSY
18
DB11
59
A11 (T/R)
19
DB12
60
TP1
20
DB13
61
TP2
21
DB14
62
RTFLAG
22
DB15
63
ADBC
23
+5V
64
RESET
24
BRO ENA
65
DTREQ
25
GND
66
BUF ENA
26
ADDRE
67
RTFAIL
27
ADDRD
68
16MHz IN
28
ADDRC
69
A5 (DAT/CMD)
29
ADDRB
70
GBR
30
ADDRA
71
DTSTR
31
ADDRP
72
R/W
32
RTADERR
73
HSFAIL
33
TXDATA B
74
A4
34
TXDATA B
75
INCMD
35
-V
EE
B
76
DTACK
36
+15V B
77
DTGRT
37
N/C
78
A0
38
GND B
79
A1
39
RXDATA B
80
A2
40
RXDATA B
81
A3
41
NC
82
NC
CT2542-FP
MIL-STD-1553B
REMOTE TERMINAL
PROTOCOL UNIT
Figure 13 Flat package Pin Connection Diagram, CT2542 and Pinout Table
1
2
N/C
N/C
N/C
N/C
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
82
81
Aeroflex Circuit Technology
SCDCT2542 REV C 8/11/98 Plainview NY (516) 694-6700
16
.100
2.100
1.500
TYP
Lead 1 & ESD
Designator
1.900
1.800
Pin 19
Pin 20
Pin 59
Pin 41
Pin 2
.050
TYP
1.650
1.870
.100
.110
Pin 1
.250
.250
MAX
Pin 39
Pin 40
Pin 78
Pin 22
Pin 21
Pin 60
.018 DIA
TYP
.080
.181
MAX
.010
.002
.015
2.000
Pin 42
.095
Pin 41
2.200
MAX
Lead 1 & ESD
Designator
1.610
MAX
Designator
MAX
.400
MIN
.050 Lead Centers
41 Leads/Side
(4 Places)
Pin 82
Flat Package Outline
Plug In Package Outline
.050
Aeroflex Circuit Technology
SCDCT2542 REV C 8/11/98 Plainview NY (516) 694-6700
17
C I R C U I T T E C H N O L O G Y
Aeroflex Circuit Technology
35 South Service Road
Plainview New York 11830
Telephone: (516) 694-6700
FAX: (516) 694-6715
Toll Free Inquiries: 1-(800)THE-1553
Specifications subject to change without notice.
Ordering Information
Model Number
Screening
DESC SMD #
Package
CT2542
Military Temperature, -55C to +125C,
Screened to the individual test methods
of MIL-STD-883
-
Plug in
CT2542-FP
-
Flat Package
CT2542-701
Industrial Temperature, -40C to +85C,
No Burn-in
-
Plug in
CT2542-FP-701
-
Flat Package
CT2542
-
59628979803XA
Plug in
CT2542
-
59628979803XC
Plug in
CT2542-FP
-
59628979803YA
Flat Package
CT2542-FP
-
59628979803YC
Flat Package
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