CD74AC253_08 Datasheet, PDF(6/16 Page) Texas Instruments – Dual 4-Input Multiplexer, Three-State

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CD74AC253_08 Datasheet, PDF (6/16 Pages) Texas Instruments – Dual 4-Input Multiplexer, Three-State

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CD74AC253, CD54/74ACT253

tr = 3ns

OUTPUT

DISABLE

tPLZ

tf = 3ns

tPZL

INPUT LEVEL

90%

10%

GND

OUTPUT: LOW

TO OFF TO LOW

OUTPUT: HIGH

TO OFF TO HIGH

tPHZ

OUTPUTS

ENABLED

OTHER

INPUTS

(TIED HIGH

OR LOW)

OUTPUT

DISABLE

DUT

WITH

THREE-

STATE

OUTPUT

tPZH

0.2VCC VOL (â GND)

0.8 VCCVOH (â VCC)

OUTPUTS

DISABLED

ENABLED

GND (tPHZ, tPZH)

OPEN (tPHL, tPLH)

500â¦â

2 VCC (tPLZ, tPZL)

(OPEN DRAIN)

50pF

OUT

500â¦â

â FOR AC SERIES ONLY: WHEN VCC = 1.5V, RL = 1kâ¦

FIGURE 1. THREE-STATE PROPAGATION DELAY WAVEFORMS AND TEST CIRCUIT

INPUT

LEVEL

tr = 3ns

I OR S

tf = 3ns

90%

10%

OUTPUT Y

tPLH

tPHL

FIGURE 2. PROPAGATION DELAY TIMES

OUTPUT

DUT

RL (NOTE)

500â¦

OUTPUT

LOAD

50pF

NOTE: For AC Series Only: When VCC = 1.5V, RL = 1kâ¦.

ACT

Input Level

Input Switching Voltage, VS

Output Switching Voltage, VS

VCC

0.5 VCC

1.5V

0.5 VCC

FIGURE 3. PROPAGATION DELAY TIMES

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