74LVC652 datasheet(9/14 Pages) PHILIPS

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Philips Semiconductors

Product specification

74LVC652

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

1998 Jul 29

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

SV00774

V M

S AB , S BA

INPUT

B n , A n

OUTPUT

V M

t PLH

t PHL

GND

V I

V OL

V OH

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

times.

SV00775

outputs

disabled

outputs

enabled

outputs

enabled

tPHZ

tPZH

tPZL

tPLZ

VOL

VCC

GND

VOH

OEBA INPUT

OEAB INPUT

OUTPUT

HIGH–to–OFF

OFF–to–HIGH

OUTPUT

LOW–to–OFF

OFF–to–LOW

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

disable times.

TEST CIRCUIT

PULSE

GENERATOR

D.U.T.

50pF

2 x VCC

Open

GND

500

Ω

500

Ω

VCC

t 2.7V

VCC

2.7V – 3.6V

2.7V

Test

GND

tPLZ/tPZL

2 x VCC

tPHZ/tPZH

tPLH/tPHL

Open

SY00003

VCC

Figure 5. Load circuitry for switching times.

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