74ALS646 View Datasheet(PDF) - Philips Electronics
Part Name
Description
View to exact match
74ALS646 Datasheet PDF : 13 Pages
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Philips Semiconductors
Transceiver/register
Product specification
74ALS646/74ALS646-1
74ALS648/74ALS648-1
AC WAVEFORMS
For all waveforms, VM = 1.3V.
The shaded areas indicate when the input is permitted to change for predictable output performance.
CPBA
or
CPAB
VM
1/fmax
tw(H)
VM
tPHL
tw(L)
VM
tPLH
An or Bn
VM
VM
SF00394
Waveform 1. Propagation Delay for Clock Input to Output,
Clock Pulse Width, and Maximum Clock Frequency
An or Bn
VM
tPHL
VM
SBA or SAB
tPLH
Bn or An
VM
VM
An or Bn
Waveform 2.
SF00395
Propagation Delay for An to Bn or Bn to An
and SAB or SBA to An or Bn
An or Bn
Bn or An
VM
tPLH
VM
VM
SBA or SAB
tPHL
VM
An or Bn
SF00396
Waveform 3. Propagation Delay for An to Bn or Bn to An
and SAB or SBA to An or Bn
OE
VM
VM
DIR
tPZH
tPHZ
VOH -0.3V
An or Bn
VM
0V
SF00398
Waveform 5. 3-State Output Enable Time to High Level
and Output Disable Time from High Level
An or Bn
CPBA
or
CPAB
VM
VM
tsu(H) th(H)
VM
VM
tsu(L)
VM
th(L)
VM
SF00397
Waveform 4. Data Setup Time and Hold Times
OE
DIR
An or Bn
VM
tPZL
VM
tPLZ
VM
3.5V
VOL +0.3V
SF00399
Waveform 6. 3-State Output Enable Time to Low Level
and Output Disable Time from Low Level
1991 Feb 08
9
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