74hc7540 NXP Semiconductors, 74hc7540 Datasheet - Page 5

• Manufacturer Part Number: 74hc7540
• Description: Octal Schmitt Trigger Buffer/line Driver; 3-state; Inverting
• Manufacturer: NXP Semiconductors

Philips Semiconductors
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see
Transfer characteristics are given below (not applicable for OE
Output capability: bus driver
I
AC CHARACTERISTICS FOR 74HC
GND = 0 V; t
TRANSFER CHARACTERISTICS FOR 74HC
Voltages are referred to GND (ground = 0 V)
December 1990
CC
t
t
t
t
V
V
V
SYMBOL PARAMETER
SYMBOL PARAMETER
PHL
PZH
PHZ
THL
T
T
H
Octal Schmitt trigger buffer/line driver;
3-state; inverting
category: MSI
/ t
/ t
/ t
/ t
TLH
PLH
PZL
PLZ
propagation delay
3-state output enable
time
3-state output disable
time
output transition time
positive-going threshold
negative-going threshold 0.30
hysteresis (V
r
= t
A
OE
OE
n
f
to Y
n
n
= 6 ns; C
to Y
to Y
n
n
n
T
L
= 50 pF
V
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
T
)
min. typ.
min. typ.
1.35
1.80
0.10
0.25
0.30
39
14
11
41
15
12
52
19
15
14
5
4
0.20
0.40
0.50
25
25
max. min. max.
120
24
20
150
30
26
150
30
26
60
12
10
max. min. max.
1.50
3.15
4.20
T
amb
5
74HC
T
40 to 85
0.30
1.35
1.80
0.10
0.25
0.30
amb
74HC
n
( C)
40 to 85
inputs).
150
30
26
190
38
33
190
38
33
75
15
13
( C)
1.50
3.15
4.20
min.
40 to 125
min.
0.30
1.35
1.80
0.10
0.25
0.30
40 to 125
max.
180
36
31
225
45
38
225
45
38
90
18
15
max.
1.50
3.15
4.20
.
UNIT
ns
ns
ns
ns
UNIT
V
V
V
74HC/HCT7540
V
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
(V)
TEST CONDITIONS
CC
Product specification
TEST CONDITIONS
V
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
(V)
CC
WAVEFORMS
Fig.8
Fig.9
Fig.9
Fig.8
WAVEFORMS
Figs 6 and 7
Figs 6 and 7
Figs 6 and 7