7LVC573APWDH datasheet(7/12 Pages) PHILIPS

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Philips Semiconductors

Product specification

74LVC573A

Octal D-type transparent latch with 5-volt

tolerant inputs/outputs (3-State)

1998 Jul 29

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

SY00041

INPUT

tPHL

tPLH

VOL

GND

VOH

OUTPUT

Waveform 1. Input (Dn) to output (Qn) propagation delays.

tPHL

tPLH

LE INPUT

Qn OUTPUT

SA00388

GND

VOH

VOL

Waveform 2. Latch enable input (LE) pulse width, the latch

enable input to output (Qn) propagation delays

tPLZ

tPZL

nOE INPUT

GND

VCC

Qn OUTPUT

LOW-to-OFF

OFF-to-LOW

VOL

VOH

Qn OUTPUT

HIGH-to-OFF

OFF-to-HIGH

GND

outputs

enabled

outputs

enabled

outputs

disabled

tPHZ

tPZH

SW00207

Waveform 3. 3-State enable and disable times.

INPUT

tSU

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

for predictable output performance.

SW00073

tSU

GND

Waveform 4. Data setup and hold times for the Dn input to the

LE input.

TEST CIRCUIT

PULSE

GENERATOR

VIN

D.U.T.

VOUT

VCC

RL=500 Ω

SWITCH POSITION

TEST

SWITCH

tPLH/tPHL

Open

tPLZ/tPZL

<VCC

tPHZ/tPZH

GND

Test Circuit for 3-State Outputs

Open

GND

<VCC

DEFINITIONS

VCC

t 2.7V

2.7 – 3.6V

VIN

VCC

2.7V

RL = Load resistor

CL = Load capacitance includes jig and probe capacitance

RT = Termination resistance should be equal to ZOUT

of pulse generators.

SW00047

RL=500 Ω

Waveform 5. Load circuitry for switching times.

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