74LVC32244A 查看數據表（PDF） - Philips Electronics

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74LVC32244A

32-bit buffer/line driver; 5 V input/output tolerant; 3-state

Philips Electronics 

Philips Semiconductors

32-bit buffer/line driver; 5 V input/output

tolerant; 3-state

Product specification

74LVC32244A;

74LVCH32244A

handbook, full pagewidth

VI

nOE INPUT

GND

VCC

OUTPUT

LOW-to-OFF

OFF-to-LOW

VOL

VOH

OUTPUT

HIGH-to-OFF

OFF-to-HIGH

GND

VM

t PLZ

t PZL

t PHZ

VX

VY

VM

t PZH

VM

outputs

enabled

outputs

disabled

outputs

enabled

MNA478

VM = 1.5 V at VCC ≥ 2.7 V or

VM = 0.5 × VCC at VCC < 2.7 V;

VX = VOL + 0.3 V at VCC ≥ 2.7 V or

VX = VOL + 0.1 V at VCC < 2.7 V;

VY = VOH − 0.3 V at VCC ≥ 2.7 V or

VY = VOH − 0.1 V at VCC < 2.7 V.

VOL and VOH are typical output voltage drop that occur with the output load.

Fig.5 3-state enable and disable times.

handbook, full pagewidth

PULSE

VI

GENERATOR

VCC

VO

D.U.T.

RT

S1

RL

500 Ω

2 × VCC

open

GND

CL

50 pF

RL

500 Ω

MNA479

TEST

tPLH/tPHL

tPLZ/tPZL

tPHZ/tPZH

S1

open

2 × VCC

GND

1999 Aug 31

VCC

VI

< 2.7 V

VCC

2.7 to 3.6 V 2.7 V

Definitions for test circuit:

RL = load resistor.

CL = load capacitance including jig and probe capacitance.

RT = termination resistance should be equal to the output impedance

Zo of the pulse generator.

Fig.6 Load circuitry for switching times.

9

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