74LVC821ABQ(2004) データシートの表示（PDF） - Philips Electronics

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74LVC821ABQ
(Rev.:2004)

10-bit D-type flip-flop with 5-volt tolerant inputs/outputs; positive-edge trigger (3-State)

Philips Electronics 

Philips Semiconductors

74LVC821A

10-bit D-type flip-flop with 5 V tolerant inputs/outputs

Table 10: Measurement points

Supply voltage

Input

VCC

< 2.7 V

≥ 2.7 V

VM

0.5 × VCC

1.5 V

Output

VM

0.5 × VCC

1.5 V

VI

OE input

GND

VCC

Qn output

LOW- to - OFF

OFF- to - LOW

VOL

VOH

Qn output

HIGH- to - OFF

OFF- to - HIGH

GND

VM

t PLZ

VM

t PZL

t PHZ

VX

VY

outputs

enabled

VM

t PZH

outputs

disabled

VM

outputs

enabled

mgu775

Fig 9.

Measurement points are given in Table 11.

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

3-state enable and disable times.

Table 11: Measurement points

Supply voltage Input

VCC

< 2.7 V

≥ 2.7 V

VM

0.5 × VCC

1.5 V

Output

VM

0.5 × VCC

1.5 V

VX

VOL + 0.1 × VCC

VOL + 0.3 V

VY

VOH − 0.1 × VCC

VOH − 0.3 V

9397 750 13276

Product data sheet

VCC

VI

PULSE

GENERATOR

VO

D.U.T.

RT

VEXT

RL

CL

RL

mna616

Data test circuit (see Table 12).

RL = Load resistor.

CL = Load capacitance including jig and probe capacitance.

RT = Termination resistance should be equal to the output impedance Zo of the pulse

generator.

Fig 10. Load circuitry for switching times.

Rev. 03 — 11 May 2004

© Koninklijke Philips Electronics N.V. 2004. All rights reserved.

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