74ACT16254

16-BIT ADDRESS/DATA MULTIPLEXER

WITH 3-STATE OUTPUTS

SCAS527A – AUGUST 1995 – NOVEMBER 1995

5

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

From Output

Under Test

CL = 50 pF

(see Note A)

LOAD CIRCUIT

S1

7 V

Open

GND

500

Ω

500

Ω

tPHL

tPLH

PROPAGATION DELAY TIMES

Output

Control

(low-level

enabling)

Output

Waveform 1

S1 at 7 V

(see Note B)

Output

Waveform 2

S1 at GND

(see Note B)

VOL

VOH

tPZL

tPZH

tPLZ

tPHZ

1.5 V

1.5 V

1.5 V

1.5 V

3.5 V

3 V

0 V

1.5 V

1.5 V

VOH

VOL

0

1.5 V

VOL + 0.3 V

1.5 V

VOH – 0.3 V

≈ 0 V

ENABLE AND DISABLE TIMES

VOLTAGE WAVEFORMS

VOLTAGE WAVEFORMS

3 V

Input

Output

3 V

0 V

1.5 V

1.5 V

tw

VOLTAGE WAVEFORMS

PULSE DURATION

Input

th

tsu

Data Input

Timing Input

1.5 V

3 V

0 V

1.5 V

1.5 V

3 V

0 V

VOLTAGE WAVEFORMS

SETUP AND HOLD TIMES

tpd

tPLZ/tPZL

tPHZ/tPZH

Open

7 V

GND

TEST

S1

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 ≤ 2.5 ns, tf ≤ 2.5 ns.

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

E. tPLZ and tPHZ are the same as tdis.

F. tPZL and tPZH are the same as ten.

G. tPHL and tPLH are the same as tpd.

Figure 1. Load Circuit and Voltage Waveforms