74HC244D NXP Semiconductors, 74HC244D Datasheet - Page 14

• Manufacturer Part Number: 74HC244D
• Description: Buffer/Line Driver 8-CH Non-Inverting 3-ST CMOS 20-Pin SO Bulk
• Manufacturer: NXP Semiconductors

Specifications of 74HC244D

• Package: 20SO
• Logic Family: HC
• Logic Function: Buffer/Line Driver
• Number Of Outputs Per Chip: 8
• Output Type: 3-State
• Input Signal Type: Single-Ended
• Maximum Propagation Delay Time @ Maximum Cl: 110@2V|22@4.5V|19@6V ns
• Polarity: Non-Inverting

Philips Semiconductors
74HC_HCT244_3
Product data sheet
Table 12:
Type
74HC244
74HCT244
Fig 8. Load circuitry for switching times
Test data is given in
Definitions test circuit:
R
C
R
S1 = Test selection switch
T
L
L
Test data
= Termination resistance should be equal to output impedance Z
= Load capacitance including jig and probe capacitance
= Load resistor
Input
V
V
3 V
I
CC
GENERATOR
PULSE
negative
positive
Rev. 03 — 22 December 2005
pulse
pulse
0 V
0 V
t
6 ns
6 ns
V
V
r
Table
, t
I
I
f
90 %
10 %
12.
V I
Load
C
15 pF, 50 pF
15 pF, 50 pF
L
t
t
f
r
V
V
M
M
R T
10 %
90 %
V
DUT
CC
74HC244; 74HCT244
t
t
R
1 k
1 k
W
W
L
V O
S1 position
t
open
open
PHL
Octal buffer/line driver; 3-state
V
V
M
M
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
C L
t
t
, t
r
f
R L
PLH
o
of the pulse generator
S1
001aad983
t
GND
GND
V
PZH
CC
open
, t
PHZ
t
V
V
PZL
CC
CC
, t
14 of 22
PLZ