74LVC543AD データシートの表示（PDF） - Philips Electronics

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74LVC543AD

Octal D-type registered transceiver (3-State)

Philips Electronics 

Philips Semiconductors

Octal D-type registered transceiver (3-State)

Product specification

74LVC543A

AC WAVEFORMS

VM = 1.5V at VCC w 2.7V; VM = 0.5 VCC at VCC t 2.7V.

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

VX = VOL + 0.3V at VCC w 2.7V; VX = VOL + 0.1 VCC at VCC t 2.7V

VY = VOH –0.3V at VCC w 2.7V; VY = VOH – 0.1 VCC at VCC t 2.7V

VI

INPUT

GND

VOH

VM

tPHL

tPLH

VI

An, Bn

ÉÉÉ ÉÉÉÉÉÉÉÉÉ INPUT

VM

ÉÉÉ ÉÉÉÉÉÉÉÉÉ GND

th

th

tSU

tSU

VI

OUTPUT

VM

LEXX, EXX

INPUT

VM

VOL

Waveform 1.

delays.

SY00041

Input (An, Bn) to output (Bn, An) propagation

GND

NOTE: The shaded areas indicate when the input is permitted to change

for predictable output performance.

SW00211

VI

LEXX INPUT

GND

VOH

An, Bn

OUTPUT

VOL

VM

VM

tw

tPHL

VM

VM

tPLH

VM

SA00408

Waveform 4. Data setup and hold times for the (An, Bn) input

to the LEXX and EXX inputs.

TEST CIRCUIT

VCC

VIN

PULSE

GENERATOR

D.U.T.

VOUT

S1

2<VCC

Open

GND

RL=500 Ω

Waveform 2. Latch enable input (LEXX) pulse width and the

latch enable input to output (An, Bn) propagation delays.

RT

CL

RL=500 Ω

VI

OEXX, EXX

INPUT

GND

VCC

OUTPUT

LOW-to-OFF

OFF-to-LOW

VOL

VOH

OUTPUT

HIGH-to-OFF

OFF-to-HIGH

GND

VM

tPLZ

tPZL

VM

VX

tPHZ

outputs

enabled

tPZH

VY

outputs

disabled

VM

outputs

enabled

Test Circuit for 3-State Outputs

SWITCH POSITION

TEST

tPLH/tPHL

tPLZ/tPZL

tPHZ/tPZH

SWITCH

Open

2<VCC

GND

VCC

t 2.7V

2.7 – 3.6V

VIN

VCC

2.7V

DEFINITIONS

RL = Load resistor

CL = Load capacitance includes jig and probe capacitance

RT = Termination resistance should be equal to ZOUT

of pulse generators.

SW00047

Waveform 5. Load circuitry for switching times.

Waveform 3. 3-State enable and disable times

SW00210

1998 Jul 31

7

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