74LVC652PW 데이터 시트보기 (PDF) - Philips Electronics

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74LVC652PW

Octal transceiver/register with dual enable (3-State)

Philips Electronics 

Philips Semiconductors

Octal transceiver/register with dual enable (3-State)

Product specification

74LVC652

AC WAVEFORMS (Continued)

VM = 1.5V at VCC w 2.7V

VM = 0.5V * 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 + 0.1VCC at VCC < 2.7V

VY = VOH – 0.3V at VCC w 2.7V

VY = VOH – 0.1VCC at VCC < 2.7V

VI

S AB , S BA

INPUT

GND

V OH

t PHL

Bn,A n

OUTPUT

V OL

VM

VM

t PLH

SV00774

Figure 3. Input SAB, SBA to output Bn, An propagation delay

times.

TEST CIRCUIT

VI

PULSE

GENERATOR

VCC

D.U.T.

RT

VO

CL 50pF

S1

500Ω

2 x VCC

Open

GND

500Ω

VCC

t 2.7V

2.7V – 3.6V

VI

VCC

2.7V

Test

tPLH/tPHL

tPLZ/tPZL

tPHZ/tPZH

S1

Open

2 x VCC

GND

SY00003

Figure 5. Load circuitry for switching times.

VI

OEAB INPUT

GND

VCC

OEBA INPUT

GND

VCC

OUTPUT

LOW–to–OFF

OFF–to–LOW

VOL

VOH

OUTPUT

HIGH–to–OFF

OFF–to–HIGH

GND

VM

VM

tPLZ

tPHZ

VX

VY

outputs

enabled

tPZL

VM

tPZH

outputs

disabled

VM

outputs

enabled

SV00775

Figure 4. OE inputs (OEAB, OEBA) to outputs An, Bn enable and

disable times.

1998 Jul 29

9

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