74ALVCH16540DL datasheet(7/12 Pages) PHILIPS

Part #	74ALVCH16540DL

Description	2.5V/3.3V 16-bit buffer/line driver, inverting, 5V input tolerant 3-State

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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Philips Semiconductors

Product specification

74ALVCH16540

16-bit buffer/line driver, inverting,

5V input tolerant (3-State)

1997 Aug 11

7

TEST CIRCUIT

PULSE

GENERATOR

RT

VIN

D.U.T.

VOUT

CL

VCC

RL=500 Ω

SWITCH POSITION

TEST

SWITCH

tPLH/tPHL

Open

tPLZ/tPZL

2

<VCC

tPHZ/tPZH

GND

Test Circuit for 3-State Outputs

Open

GND

S1

2

<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 3. Load circuitry for switching times

AC WAVEFORMS FOR VCC = 2.3V TO 2.7V AND VCC < 2.3V RANGE

VM = 0.5 * VCC

VX = VOL + 0.15V

VY = VOH –0.15V

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

output load.

V

I = VCC

SW00111

nAn

INPUT

VM

tPHL

tPLH

VOL

VI

VM

GND

VOH

nYn

OUTPUT

Waveform 4. Input (An) to output (Yn) propagation delay times

tPLZ

tPZL

VI

OE INPUT

GND

VCC

Y OUTPUT

LOW-to-OFF

OFF-to-LOW

VOL

VOH

Y OUTPUT

HIGH-to-OFF

OFF-to-HIGH

GND

outputs

enabled

outputs

enabled

outputs

disabled

tPHZ

VM

tPZH

VX

VY

SW00112

Waveform 5. 3-State enable and disable times

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