7.22

6

IDT54/74FCT841A/B/C

HIGH-PERFORMANCE CMOS BUS INTERFACE LATCHES

MILITARY AND COMMERCIAL TEMPERATURE RANGES

Pulse

Generator

D.U.T.

50pF

500

Ω

500

Ω

7.0V

3V

1.5V

0V

3V

1.5V

0V

3V

1.5V

0V

3V

1.5V

0V

DATA

INPUT

TIMING

INPUT

ASYNCHRONOUS CONTROL

PRESET

CLEAR

ETC.

SYNCHRONOUS CONTROL

HIGH-LOW-HIGH

PULSE

LOW-HIGH-LOW

PULSE

1.5V

1.5V

SAME PHASE

INPUT TRANSITION

3V

1.5V

0V

1.5V

OUTPUT

OPPOSITE PHASE

INPUT TRANSITION

3V

1.5V

0V

CONTROL

INPUT

3V

1.5V

0V

3.5V

0V

OUTPUT

NORMALLY

LOW

OUTPUT

NORMALLY

HIGH

SWITCH

CLOSED

SWITCH

OPEN

0.3V

0.3V

3.5V

0V

1.5V

1.5V

ENABLE

DISABLE

PRESET

CLEAR

CLOCK ENABLE

ETC.

TEST CIRCUITS AND WAVEFORMS

TEST CIRCUITS FOR ALL OUTPUTS

SET-UP, HOLD AND RELEASE TIMES

PULSE WIDTH

SWITCH POSITION

Test

Switch

Open Drain

Disable Low

Closed

Enable Low

All Other Tests

Open

DEFINITIONS:

2607 tbl 08

Generator.

ENABLE AND DISABLE TIMES

PROPAGATION DELAY

NOTES:

1. Diagram shown for input Control Enable-LOW and input Control Disable-

HIGH

2. Pulse Generator for All Pulses: Rate

2607 drw 04