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Part Number CT1508-2

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eroflex Circuit T
echnology
­ Data Bus Modules For The Future © SCDCT1508 REV A 3/22/00
Features
· Unique Manchester decoder requires no clock
· 4 Bit SIS / SOS output
· Operates with ±5 volt supply
· Removes sync, word identifier and parity bits
· Does both data and SIS / SOS decoding
· Detects parity on all received data
· Flags received messages with word lengths greater than 4 bits
· Accepts self-test inputs for BITE applications
· Generates one clock edge per received bit for bit counting applications
· May be used as a serial decoder for indefinite word lengths
· Interfaces directly to the CT1496-2 (Manchester Encoder) and CT1469-2 (Transceiver)
· MIL-PRF-38534 compliant devices available
General Description
CT1508-2 is a hybrid microcircuit which incorporates a serial decoder in a single package. The encoder accepts a "N"
Bit (Typically 4, 34 or 35) serial Manchester encoded TTL NRZ signals and outputs a 4 bit SIS / SOS TTL output along
with "N" recovered data Bits/Clocks. Aeroflex Circuit Technology is a 80,000 square foot MIL-PRF-38534 certified
facility in Plainview, N.Y.
CIRCUIT TECHNOLOGY
www.aeroflex.com
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B
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ISO
9001
Block Diagram
DATA
DATAst
DATAst
DATA
Master
Reset
Transmission
Envelope
SIS / SOS Output
C
/
I
B
i
t

4
D
a
t
a
S
y
n
c
CLOCKr
SIS / SOS
False
TP1 TP1 TP1
TP1
Test Points
4 Bit
SIS / SOS
Counter
Manchester
Decoder / Clock
Regenerator
+5V
Gnd
-5V
V
CC
V
EE
DATAr
Data
Reconstruct
Register
Serial Manchester 4-Bit SIS / SOS Decoder
MIL-STD-1397 Type E 10MHz
CT1508-2
A
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f
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e
x

C
i
r
c
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i
t

T
e
c
h
n
o
l
o
g
y
S
C
D
C
T
1
5
0
8

R
E
V

A

3
/
2
2
/
0
0


P
l
a
i
n
v
i
e
w

N
Y

(
5
1
6
)

6
9
4
-
6
7
0
0
2
1
ST
Data
Bit
2
ND
Data
Bit
3
RD
Data
Bit
4
TH
Data
Bit
5
TH
Data
Bit
RX Data
Data
R
Clock
R
SIS / SOS
False
Transmission
Envelope
PW2
T1
T2
T3
T6
T7
T4
T9
T10
T11
PW1
T5
PW3
RX Data
Master Reset
V
IH
V
OH
0V
0V
V
OL
V
OL
3V
3V
V
OH
V
OL
V
IH
V
IL
V
IL
V
OH
Figure 1 ­ Decoder Timing Waveforms
Aeroflex Circuit Technology
SCDCT1508 REV A 3/22/00 Plainview NY (516) 694-6700
3
Absolute Maximum Ratings
Parameter
Rating
Units
Supply Voltage
V
CC
V
EE
+7.0
-7.0
V
V
Input Voltage
+0.5 to +5.5
V
Applied Output Voltage
-0.5 to +7.0
V
Power Dissipation
2.17
W
Storage Temperature Range
-60 to +150
°C
Operating Case Temperature Range
-55 to +100
°C
DC Electrical Characteristics
(V
DD
= 5V ±10%, T
C
= -55 °C to +100°C, unless otherwise specified)
SYMBOL
PARAMETER
LIMIT
SIS / SOS False & SIS / SOS Outputs
V
OH
Logic High Output Voltage
2.4V min @ I
OH
= -50µA, V
CC
= +4.5V
V
OL
Logic Low Output Voltage
0.4V max @ I
OL
= 2mA, V
CC
= +4.5V
Clock
r
& Data
r
V
OH
Logic High Output Voltage
2.4V min @ I
OH
= -150mA, V
CC
= +4.5
V
OL
Logic Low Output Voltage
0.4V max @ I
OL
= 6mA, V
CC
= +4.5V
Transmission Envelope
V
OH
Logic High Output Voltage
2.4V min @ I
OH
= -200mA, V
CC
= +4.5V
V
OL
Logic Low Output Voltage
0.4V max @ I
OL
= 8mA, V
CC
= +4.5V
RX DATA, RX DATA, DATAst, DATAst & Master Reset
I
IH
Logic High Input Current
50µA max @ V
IH
= 2.7V, V
CC
= +5.5V
I
IL
Logic Low Input Current
2mA max @ V
IL
= 0.4V, V
CC
= +5.5V
DC Supply Currents
I
CC
V
CC
= +5.5V (pin 1)
360mA max
I
EE
V
EE
= -5.5V (pin 9)
35mA max
Aeroflex Circuit Technology
SCDCT1508 REV A 3/22/00 Plainview NY (516) 694-6700
4
Decoder Timing Characteristics
(V
CC
= 5V ±10%, T
C
= -55 °C to +100°C, See Figure 1, unless otherwise specified)
Symbol
Parameter / Condition
Min
Typ
Max
Unit
T1
Bit transition 0 - 0, 1 - 1
35
60
65
ns
T2
Bit transition 0 - 1, 1 - 0
90
100
130
ns
T3
Transmission envelope off delay
100
-
250
ns
T4
Clock
R
low time
35
50
65
ns
T5
Envelope delay time
-
25
40
ns
T6
Data decode delay
-
35
45
ns
T7
Clock low transition delay
-
50
-
ns
T8
Word Parity Delay
-
120
-
ns
T9
Clock
R
low time
35
50
65
ns
T10
SIS / SOS false delay time
-
40
80
ns
T11
minimum reset disable time
20
-
-
ns
PW1
Half Bit input pulse
20
50
65
ns
PW2
Full Bit input pulse
90
100
130
ns
PW3
Master reset pulse width
60
-
-
ns
Aeroflex Circuit Technology
SCDCT1508 REV A 3/22/00 Plainview NY (516) 694-6700
5
Functional Description and Pinout
Pin
#
Pin Name
Function
Load or
Drive
1
V
CC
+5V
±
10%
-
9
V
EE
-5V
±
10%
-
2
RX
DATA
Connect to DATA output of RX
1 S Load
4
RX
DATA
Connect to DATA output of RX
1 S Load
3
DATA
ST
Connect to DATA
ST
output of encoder
1 S Load
6
DATA
ST
Connect to DATA
ST
output of encoder
1 S Load
14
Transmission
Envelope
High within approximately 40nSec of reception
of first half bit; goes low approximately 100nSec
after reception of last half bit (normally low in
inactive state).
4 S Drives
19
SIS / SOS False
Reset to low state on clear. Goes high
reception of transmission with word length
greater than 4 bits.
1 S Drive
20
21
22
24
SIS / SOS Output
(Pin 24 - LSB)
(Pin 20 - MSB)
Last 4 bits received reside in this register until
cleared. If valid SIS / SOS then register contains
SIS / SOS message.
1 S Drive
17
Data
R
Reconstructed Data. Data state to be
considered in conjunction with positive edges of
Clock
R
.
8
Clock
R
Reconstructed Clock (approximately 50% duty
cycle) to be used in conjunction with
Reconstructed Data and maybe used for bit
counting applications.
7
Master Reset
Clears all data registers, bit counter, WORD
PARITY on low. Must be used after each word
to initialize bit counter and parity detector.
11
TP1
Do not connect.
15
TP2
Do not connect.
16
TP3
Do not connect.
13
TP4
Do not connect.
Aeroflex Circuit Technology
SCDCT1508 REV A 3/22/00 Plainview NY (516) 694-6700
6
General Notes:
1 S Load: Requires I
IL
= 2 mA Max. I
IH
= 50 µA Max. C
IN
<15pF
1 S Drive: Requires I
OH
= 50 µA Min. I
OL
= 2 mA Min.
Thruput Delay - 150 nSec Max to serial outputs
Power Dissipation
1.38 Watts Typ +5V ±10% 250 mA Typ, 360 mA Max.
2.17 Watts Max. -5V ±10% 25 mA Typ, 35 mA Max.
Power Sequence is not required.
Functional Description and Pinout (con't)
Pin
#
Pin Name
Function
Load or
Drive
Aeroflex Circuit Technology
SCDCT1508 REV A 3/22/00 Plainview NY (516) 694-6700
7
Pin #'s
Functions
Pin #'s
Functions
1
Vcc (+5V)
31
NC
2
DATA
32
NC
3
DATA ST
33
NC
4
DATA
34
NC
5
GND
35
NC
6
DATA ST
36
NC
7
MASTER RESET
37
NC
8
CLOCK R
38
NC
9
V
EE
(-5V)
39
NC
10
GND
40
NC
11
TP1
41
NC
12
GND
42
NC
13
TP4
43
NC
14
TRANSMISSION ENVELOPE
44
NC
15
TP2
45
NC
16
TP3
46
NC
17
DATA R
47
NC
18
GND
48
NC
19
SIS / SOS FALSE
49
NC
20
BIT 4
50
NC
21
C / I
51
NC
22
DATA (SIS/SOS)
52
NC
23
GND
53
NC
24
SYNC
54
NC
25
NC
55
NC
26
NC
56
NC
27
NC
57
NC
28
NC
58
NC
29
NC
59
NC
30
NC
60
NC
Aeroflex Circuit Technology
SCDCT1508 REV A 3/22/00 Plainview NY (516) 694-6700
8
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 11803
Telephone: (516) 694-6700
FAX: (516) 694-6715
Toll Free Inquiries: 1-(800)THE-1553
Ordering Information
Model Number
Package
CT1508-2
Flat Package
.015 ±.003
.050 TYP
1.590 MAX
.175 MAX
Flat Package Outline
Specifications subject to change without notice.
1.450
(30 Leads/Side on .050 centers)
1.015
MAX
.010 ±.002
.450
MIN
Lead 1 & ESD
Designator