CT2578 Datasheet, PDF (16/22 Pages) Aeroflex Circuit Technology – CT2578 / CT2581 SIMPLE REMOTE TERMINAL FOR MIL-STD-1553 / 1760 & McAir

MIN MAX UNIT
1. Rising edge of NCMDSTRB to falling 0.5 10.0 uS
edge of first NSSTRB
2. NSSTRB to next NSSTRB
1.0 16.0 uS
3. Rising edge of C1MHZ to falling edge
75 nS
of NSSTRB
4. Falling edge of C1MHZ to rising edge
75 nS
of NSSTRB
5. Falling edge of NSSTRB to data enabled
75 nS
onto T0-T15 from subsystem
6. Rising edge of NSSTRB to data disabled
75 nS
onto T0-T15 from subsystem
16 MHZ CLOCK REQUIREMENT
MIN MAX
T
40% 60% of cycle
C1MHZ
1
NCMDSTRB
2
3
NDATAST
4
5
T0-T15
MIN MAX UNIT
1. Rising edge of NCMDSTRB to falling 225 275 nS
edge of first NDATAST
2. NDATAST to next NDATAST
475 525 nS
3. NDATAST pulse duration
225 275 nS
4. Data valid on T0-T15 to NDATAST 100
nS
5. NDATAST to data invalid on T0-T15 100
nS
NRES/NSYNC
2
T0-T15
1
3
NENVW
T0-T15
5
6
1. NRES/NSYNC pulse duration
2. T0-T15 valid to NSYNC
3. NSYNC to T0-T15 invalid
4. NVCR to NRES/NSYNC non bcast
NVCR to NRES/NSYNC bcast
5. NENVW to T0-T15 valid
6. NENVW to T0-T15 invalid
7. NENVW is reset by NVCR
MIN MAX UNIT
475 525 nS
50
nS
250
nS
27.9 28.1 uS
8.9 9.1 uS
250 nS
500
nS
TRANSFORMERS
The device requires a 1:2.5 turns ratio for direct coupling and
1:1.79 turns ratio for transformer coupling. The centre tap of the
transformers must be tied to ground.
The suggested transformer are:-
Technitrol 1553-45
Aeroflex 25T1553-45
DATA ^{P 1:1.79 1:1.4 0.75Zo}
0.75Zo
NDATA _P’
Transformer coupled
DATA
NDATA
1:2.5
0.75Zo _A
0.75Zo
Direct coupled
A’ _Zo
SCDCT2578 REV B 3/11/98
16