SN54ACT573, SN74ACT573

OCTAL D-TYPE TRANSPARENT LATCHES

WITH 3-STATE OUTPUTS

SCAS538D − OCTOBER 1995 − REVISED OCTOBER 2002

5

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

3 V

3 V

0 V

0 V

VOLTAGE WAVEFORMS

Data Input

3 V

0 V

Input

Output

Timing Input

From Output

Under Test

(see Note A)

LOAD CIRCUIT

S1

2

500

Ω

500

Ω

Output

Control

(low-level

enabling)

Output

Waveform 1

S1 at 2

(see Note B)

Output

Waveform 2

S1 at Open

(see Note B)

0 V

≈0 V

Open

VOLTAGE WAVEFORMS

Open

2

Open

TEST

S1

3 V

0 V

VOLTAGE WAVEFORMS

Input

3 V

B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.

Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.

C. All input pulses are supplied by generators having the following characteristics: PRR

D. The outputs are measured one at a time with one input transition per measurement.

VOLTAGE WAVEFORMS

1.5 V

1.5 V

1.5 V

1.5 V

1.5 V

1.5 V

1.5 V

1.5 V

1.5 V

Figure 1. Load Circuit and Voltage Waveforms