74AC11257

QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER

WITH 3-STATE OUTPUTS

SCAS049C − MARCH 1989 − REVISED MAY 2004

5

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

50%

50%

0 V

Input

Out-of-Phase

Output

In-Phase

Output

VOLTAGE WAVEFORMS

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 GND

(see Note B)

50%

50%

0 V

[ 0 V

GND

Open

VOLTAGE WAVEFORMS

Open

2

GND

TEST

S1

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.

Figure 1. Load Circuit and Voltage Waveforms