74AHC373 Philips Semiconductors, 74AHC373 Datasheet - Page 2

• Manufacturer Part Number: 74AHC373
• Description: Octal D-type transparent latch; 3-state
• Manufacturer: Philips Semiconductors

Philips Semiconductors
FEATURES
DESCRIPTION
The 74AHC/AHCT373 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
Ground = 0 V; T
Notes
1. C
2. The condition is V
1999 Nov 23
t
C
C
C
PHL
ESD protection:
HBM EIA/JESD22-A114-A exceeds 2000 V
MM EIA/JESD22-A115-A exceeds 200 V
CDM EIA/JESD22-C101 exceeds 1000 V
Balanced propagation delays
All inputs have Schmitt-trigger actions
Inputs accepts voltages higher than V
Common 3-state output enable input
Functionally identical to the ‘533’, ‘563’ and ‘573’
For AHC only: operates with CMOS input levels
For AHCT only: operates with TTL input levels
Specified from 40 to +85 C and 40 to +125 C.
I
O
PD
Octal D-type transparent latch; 3-state
P
f
f
C
V
i
o
/t
SYMBOL
D
CC
PD
= input frequency in MHz;
L
PLH
= output frequency in MHz;
(C
= output load capacitance in pF;
= C
is used to determine the dynamic power dissipation (P
= supply voltage in Volts.
L
PD
V
CC
V
2
amb
CC
f
2
= 25 C; t
o
propagation delay
D
input capacitance
output capacitance
power dissipation
capacitance
) = sum of outputs;
I
n
f
= GND to V
i
to Q
+
PARAMETER
n
(C
; LE to Q
r
= t
L
f
CC
V
3.0 ns.
CC
.
n
2
CC
f
o
) where:
C
V
C
notes 1 and 2
I
L
L
= V
= 15 pF; V
= 50 pF; f = 1 MHz;
CC
CONDITIONS
or GND
2
CC
The 74AHC/AHCT373 are octal D-type transparent
latches featuring separate D-type inputs for each latch and
3-state outputs for bus oriented applications. A Latch
Enable (LE) input and an Output Enable (OE) input are
common to all latches.
The ‘373’ consists of eight D-type transparent latches with
3-state true outputs. When LE is HIGH, data at the
D
are transparent, i.e. a latch output will change state each
time its corresponding D-input changes.
When LE is LOW the latches store the information that
was present at the D-inputs a set-up time preceding the
HIGH-to-LOW transition of LE. When OE is LOW, the
contents of the 8 latches are available at the outputs.
When OE is HIGH, the outputs go to the high-impedance
OFF-state. Operation of the OE input does not affect the
state of the latches.
The ‘373’ is functionally identical to the ‘533’, ‘563’ and
‘573’, but the ‘533’ and ‘563’ have inverted outputs and the
‘563’ and ‘573’ have a different pin arrangement.
n
D
= 5 V
inputs enters the latches. In this condition the latches
in W).
4.3
3.0
4.0
10
74AHC373; 74AHCT373
AHC
TYPICAL
4.3
3.0
4.0
12
AHCT
Product specification
ns
pF
pF
pF
UNIT