HD74LV244A Datasheet, PDF (7/15 Pages) Hitachi Semiconductor – Octal Buffers / Drivers with 3-state Outputs

HD74LV244A
Switching Characteristics
• V_CC = 2.5 ± 0.2 V
Ta = 25°C
Ta = –40 to 85°C
Item
Propagation
delay time
Enable time
Disable
time
Symbol Min Typ
t_PLH
— 7.5
t_PHL
— 9.5
t_ZH
— 8.9
t_ZL
Max Min
12.5 1.0
15.3 1.0
14.6 1.0
— 10.8 17.8 1.0
t_HZ
— 9.1 14.1 1.0
t_LZ
— 13.4 19.2 1.0
Max
15.0
18.0
17.0
Unit Test Conditions
ns C_L = 15 pF
C_L = 50 pF
ns C_L = 15 pF
21.0
16.0
C_L = 50 pF
ns C_L = 15 pF
21.0
C_L = 50 pF
FROM
(Input)
A
OE
OE
TO
(Output)
Y
Y
Y
• V_CC = 3.3 ± 0.3 V
Ta = 25°C
Ta = –40 to 85°C
Item
Propagation
delay time
Enable time
Disable
time
Symbol Min Typ
t_PLH
— 5.4
t_PHL
— 6.8
t_ZH
— 6.3
t_ZL
Max Min
8.4 1.0
11.9 1.0
10.6 1.0
— 7.8 14.1 1.0
t_HZ
— 7.6 11.7 1.0
t_LZ
— 11.0 16.0 1.0
Max Unit Test Conditions
10.0
ns
C_L = 15 pF
13.5
C_L = 50 pF
12.5
ns
C_L = 15 pF
16.0
C_L = 50 pF
13.0
ns
C_L = 15 pF
18.0
C_L = 50 pF
FROM
(Input)
A
TO
(Output)
Y
OE
Y
OE
Y
7