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| 74HC243N Datasheet, PDF (10/17 Pages) NXP Semiconductors – Quad bus transceiver; 3-state | |||
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Philips Semiconductors
12. Waveforms
74HC243
Quad bus transceiver; 3-state
An, Bn
input
VM
Bn, An
output
tPHL
VM
tPLH
tTHL
tTLH
001aab955
VM = 0.5 Ã VI.
Fig 5. Waveforms showing the input (An and Bn) to output (Bn and An) propagation
delays and the output transition times
OEA input
output
LOW to OFF
OFF to LOW
output
HIGH to OFF
OFF to HIGH
tr
10 %
90 %
VM
tPLZ
tf
tPZL
tPHZ
10 %
90 %
VM
tPZH
VM
outputs
enabled
outputs
disabled
outputs
enabled
001aab959
VM = 0.5 Ã VI.
Fig 6. Waveforms showing the 3-state enable and disable times for input OEA
9397 750 13808
Product data sheet
Rev. 03 â 12 November 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
10 of 17
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