HD74HC253 Datasheet, PDF (4/7 Pages) Hitachi Semiconductor – Dual 4-to-1-line Data Selectors/Multiplexers (with 3-state outputs)

HD74HC253
Switching Characteristics
Item
Symbol V_CC (V)
Propagation delay tPLH
2.0
time
t_PHL
4.5
6.0
t_PLH
2.0
t_PHL
4.5
6.0
Output enable time t_ZH
2.0
t_ZL
4.5
6.0
Output disable
time
t_HZ
2.0
t_LZ
4.5
6.0
Output rise/fall
time
t_TLH
2.0
t_THL
4.5
6.0
Input capacitance Cin
—
Ta = 25°C
Min Typ Max
— — 125
— 18 25
— — 21
— — 160
— 20 32
— — 27
— — 100
— 11 20
— — 17
— — 150
— 15 30
— — 26
— — 75
— 5 15
— — 13
— 5 10
(C_L = 50 pF, Input t_r = t_f = 6 ns)
Ta = –40 to +85°C
Unit
Min
Max
Test Conditions
—
155 ns Data to Y
—
31
—
26
—
200 ns Select to Y
—
40
—
34
—
125 ns
—
25
—
21
—
190 ns
—
38
—
33
—
95
ns
—
19
—
16
—
10 pF
Test Circuit
VCC
Input
Pulse Generator
Zout = 50 Ω
VCC
Output
1G
1Y
1C0 to 1C3
A
B
2C0 to 2C3
2G
2Y
Output
1 k Ω _S1
C_L =
50 pF
1 k Ω _S1
C_L =
50 pF
Note : 1. C_L includes probe and jig capacitance.
OPEN
GND
V_CC
OPEN
GND
V_CC
TEST
t_PLH / t _PHL
t_ZH/ t _HZ
t_ZL / t _LZ
S1
OPEN
GND
V_CC
Rev.2.00 Jan 31, 2006 page 4 of 6