74hc7540 NXP Semiconductors, 74hc7540 Datasheet - Page 2

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

Philips Semiconductors
FEATURES
GENERAL DESCRIPTION
The 74HC/HCT7540 are high-speed Si-gate CMOS
devices and are pin compatible with low power Schottky
TTL (LSTTL). They are specified in compliance with
JEDEC standard no. 7A.
QUICK REFERENCE DATA
GND = 0 V; T
Notes
1. C
2. For HC the condition is V
ORDERING INFORMATION
See
December 1990
SYMBOL PARAMETER
t
C
C
PHL
Inverting outputs
Schmitt trigger action on all data inputs
Output capability: bus driver
I
Octal Schmitt trigger buffer/line driver;
3-state; inverting
I
PD
CC
f
f
C
V
For HCT the condition is V
i
o
“74HC/HCT/HCU/HCMOS Logic Package Information”
/ t
CC
PD
= input frequency in MHz
L
category: MSI
= output frequency in MHz
(C
PLH
= output load capacitance in pF
P
= supply voltage in V
is used to determine the dynamic power dissipation (P
L
D
= C
V
propagation delay A
input capacitance
power dissipation capacitance per buffer
CC
amb
PD
2
= 25 C; t
V
f
o
CC
) = sum of outputs
2
f
r
i
= t
I
I
f
= GND to V
= GND to V
= 6 ns
(C
n
L
to Y
V
n
CC
2
CC
CC
f
o
) where:
1.5 V
CONDITIONS
C
notes 1 and 2
2
.
L
The 74HC/HCT7540 are octal Schmitt trigger inverting
buffer/line drivers with 3-state outputs. The 3-state outputs
are controlled by the output enable inputs OE
A HIGH on OE
impedance OFF-state.
The Schmitt trigger action in the data inputs transforms
slowly changing input signals into sharply defined
jitter-free output signals.
The “7540” is identical to the “540” but has hysteresis on
the data inputs.
= 15 pF; V
D
in W):
CC
= 5 V
n
causes the outputs to assume a high
HC
11
3.5
29
74HC/HCT7540
TYPICAL
Product specification
HCT
16
3.5
31
1
and OE
ns
pF
pF
UNIT
2
.