HD74HC540_15 Datasheet, PDF (6/11 Pages) Renesas Technology Corp – Octal Buffers/Line Drivers (with 3-state outputs)

HD74HC540, HD74HC541
Switching Characteristics (C_L = 50 pF, Input t_r = t_f = 6 ns)
Item
Propagation delay
time
Output enable
time
Output disable
time
Output rise/fall
time
Input capacitance
Symbol VCC (V)
tPLH
2.0
tPHL
4.5
6.0
tPLH
2.0
tPHL
4.5
6.0
tZH
2.0
tZL
4.5
6.0
tHZ
2.0
tLZ
4.5
6.0
tTLH
2.0
tTHL
4.5
6.0
Cin
—
Ta = 25°C
Min Typ Max
— — 100
— 11 20
— — 17
— — 115
— 12 23
— — 20
— — 150
— 14 30
— — 26
— — 150
— 16 30
— — 26
— — 60
— 4 12
— — 10
— 5 10
Ta = –40 to +85°C
Min
Max Unit
Test Conditions
—
125 ns (HD74HC540 only)
—
25
—
21
—
145 ns (HD74HC541 only)
—
29
—
25
—
190 ns
—
38
—
33
—
190 ns
—
38
—
33
—
75
ns
—
15
—
13
—
10
pF
Test Circuit
VCC
VCC
Input
Pulse Generator
Zout = 50 Ω
G1, G2
Output
Y1 to Y8
A1 to A8
1 k Ω _S1
C_L =
50 pF
TEST
t_PLH / t _PHL
t_ZH/ t _HZ
t_ZL / t _LZ
OPEN
GND
V_CC
S1
OPEN
GND
V_CC
Note : 1. C_L includes probe and jig capacitance.
Rev.2.00 Mar 30, 2006 page 4 of 8