Aeroflex Circuit Technology

SCDCT1820 REV D 6/25/99 Plainview NY (516) 694-6700

8

Symbol

Description

Min

Max

Units

TAKE DATA RELAY ON

-

125

ns

TAKE DATA DELAY OFF

-

125

ns

SYNC DELAY

-

50

ns

VALID WORD DELAY

-

125

ns

BROADCAST DELAY

-

70

ns

RT ENABLE DELAY

-

100

ns

MODE CODE DELAY

-

100

ns

DATA SELECT INPUT DELAY

0 (Note 1)

-

ns

PARALLEL DATA OUTPUT DELAY

-

50 (Note 2)

ns

Notes: 1. DATA SELECT may be applied at any tlme that the 16 line I/O is otherwise free.

The parallel DATA OUT, however, is not ’NEWDATA’ until 50ns after TAKE DATA goes high.

2. 180ns max for CT1555-3.

Figure 6 – Decoding Timing Detail

5

19

4

DECODER

SHIFT CLOCK

TAKE

DATA

PARALLEL

DATA OUT

DATA

SELECT

MODE

CODE

BROADCAST

VALID

WORD

RT ENABLE

C/D SYNC

LAST STATE

NEW SYNC

LAST STATE

NEW DATA