74ABT16821ADL datasheet(9/16 Pages) NXP

Part #	74ABT16821ADL

Description	20-bit bus-interface D-type flip-flop; positive-edge trigger; 3-state

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Manufacturer	NXP [NXP Semiconductors]

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74ABT16821A_3

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Product data sheet

Rev. 03 — 16 March 2010

9 of 16

NXP Semiconductors

74ABT16821A

20-bit bus-interface D-type flip-flop; positive-edge trigger; 3-state

11. Waveforms

VM = 1.5 V

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

Fig 5.

Propagation delay, clock input to output, clock pulse width, and maximum clock frequency

001aae858

tPHL

tPLH

tWH

tWL

1 / fmax

VM

nCP

nQx

0 V

VOH

VOL

VI

VM = 1.5 V

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

Fig 6.

3-state output enable time to HIGH-level and output disable time from HIGH- level

001aal294

tPLZ

tPHZ

outputs

disabled

outputs

enabled

VOH − 0.3 V

VOL + 0.3 V

outputs

enabled

output

LOW-to-OFF

OFF-to-LOW

output

HIGH-to-OFF

OFF-to-HIGH

nOE input

VI

VOL

VOH

3.5 V

VM

GND

tPZL

tPZH

VM

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74ABT16821ADL Datasheet(PDF) 9 Page - NXP Semiconductors

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