74ACT11656

OCTAL BUFFER/LINE DRIVER

WITH PARITY CHECKER/GENERATOR AND 3STATE OUTPUTS

SCAS460A − DECEMBER 1994 − REVISED APRIL 1996

6

POST OFFICE BOX 655303

POST OFFICE BOX 1443

PARAMETER MEASUREMENT INFORMATION

NOTES: A. CL includes probe and jig capacitance.

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

≤ 1 MHz, ZO = 50 Ω, tr = 3 ns, tf = 3 ns.

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

50%

tPLH

tPHL

VOH

VOL

1.5V

3 V

0 V

Input

In-Phase

Output

50%

VOLTAGE WAVEFORMS

From Output

Under Test

CL = 50 pF

(see Note A)

LOAD CIRCUIT

S1

2

× VCC

500

Ω

500

Ω

Output

Control

(low-level

enabling)

Output

Waveform 1

S1 at 2

× VCC

(see Note B)

Output

Waveform 2

S1 at GND

(see Note B)

VOL

VOH

tPZL

tPZH

tPLZ

tPHZ

VCC

0

50%

20%

50%

80%

3 V

GND

Open

VOLTAGE WAVEFORMS

tPLH/tPHL

tPLZ/tPZL

tPHZ/tPZH

Open

2

× VCC

GND

TEST

S1

1.5V

1.5V

1.5V

VOL

Figure 1. Load Circuit and Voltage Waveforms