74ACT11620

OCTAL BUS TRANSCEIVER

WITH 3STATE OUTPUTS

SCAS060A − D2957, JULY 1987 − REVISED APRIL 1993

POST OFFICE BOX 655303

POST OFFICE BOX 1443

5

PARAMETER MEASUREMENT INFORMATION

From Output

Under Test

CL = 50 pF

(see Note A)

LOAD CIRCUIT

S1

2 X VCC

Open

GND

500

Ω

500

Ω

TEST

tPLH/tPHL

tPLZ/tPZL

tPHZ/tPZH

S1

OPEN

2 x VCC

GND

tPLH

tPHL

tPHL

tPLH

VOH

VOH

VOL

VOL

1.5 V

1.5 V

3 V

0

50%

50%

Input

(see Note C)

Out-of-Phase

Output

In-Phase

Output

Output

Control

(Low-Level

Enabling)

Output

Waveform 1

S1 at 2 x VCC

(see Note B)

Output

Waveform 2

S1 at GND

(see Note B)

VOL

VOH

tPZL

tPZH

tPLZ

tPHZ

1.5 V

1.5 V

0

50%

20%

50%

80%

ENABLE AND DISABLE TIMES

VOLTAGE WAVEFORMS

3 V

50%

50%

VOLTAGE WAVEFORMS

PROPAGATION DELAY TIMES

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

≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns.

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

Figure 1. Load Circuit and Voltage Waveforms