74HC244; 74HCT244
Philips Semiconductors
Octal buffer/line driver; 3-state
V
I
nOE input
V
M
GND
t
t
PZL
PLZ
V
CC
nYn output
LOW-to-OFF
OFF-to-LOW
V
M
V
X
V
OL
t
t
PZH
PHZ
V
OH
V
Y
nYn output
HIGH-to-OFF
OFF-to-HIGH
V
M
GND
outputs
enabled
outputs
disabled
outputs
enabled
001aae014
Measurement points are given in Table 11.
VOL and VOH are typical voltage output drop that occur with the output load.
Fig 7. 3-state enable and disable times
Table 11: Measurement points
Type
Input
VM
Output
VM
74HC244
0.5VCC
1.3 V
0.5VCC
1.3 V
74HCT244
74HC_HCT244_3
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 03 — 22 December 2005
13 of 22