HD74HC540, HD74HC541
Switching Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = 25°C
Typ Max
Ta = –40 to +85°C
Item
Propagation delay
time
Symbol VCC (V)
tPLH
tPHL
Unit
Test Conditions
Min
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Min
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Max
125
25
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
—
—
11
—
—
12
—
—
14
—
—
16
—
—
4
100
20
ns (HD74HC540 only)
17
21
tPLH
tPHL
115
23
145
29
ns (HD74HC541 only)
20
25
Output enable
time
tZH
tZL
150
30
190
38
ns
ns
ns
pF
26
33
Output disable
time
tHZ
tLZ
150
30
190
38
26
33
Output rise/fall
time
tTLH
tTHL
60
75
12
15
—
5
10
13
Input capacitance
Cin
10
10
Test Circuit
VCC
VCC
Output
G1, G2
Y1 to Y8
A1 to A8
1 kΩ
Input
OPEN
GND
VCC
S1
Pulse Generator
Zout
CL =
50 pF
Ω
= 50
TEST
S1
tPLH/ tPHL
tZH/ tHZ
tZL / tLZ
OPEN
GND
VCC
Note : 1. CL includes probe and jig capacitance.
Rev.2.00 Mar 30, 2006 page 4 of 8
RENESAS [ RENESAS TECHNOLOGY CORP ]
