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M74HC123A

Description
HC/UH SERIES, DUAL MONOSTABLE MULTIVIBRATOR, PDSO16
Categorysemiconductor    logic   
File Size270KB,14 Pages
ManufacturerSTMicroelectronics
Websitehttp://www.st.com/
Download Datasheet Parametric View All

M74HC123A Overview

HC/UH SERIES, DUAL MONOSTABLE MULTIVIBRATOR, PDSO16

M74HC123A Parametric

Parameter NameAttribute value
Number of functions2
Number of terminals16
Maximum operating temperature125 Cel
Minimum operating temperature-55 Cel
Maximum supply/operating voltage6 V
Minimum supply/operating voltage2 V
Rated supply voltage4.5 V
Processing package descriptionSO-16
Lead-freeYes
EU RoHS regulationsYes
stateACTIVE
CraftsmanshipCMOS
packaging shapeRECTANGULAR
Package SizeSMALL OUTLINE
surface mountYes
Terminal formGULL WING
Terminal spacing1.27 mm
terminal coatingNICKEL PALLADIUM GOLD
Terminal locationDUAL
Packaging MaterialsPLASTIC/EPOXY
Temperature levelMILITARY
seriesHC/UH
Logic IC typeMONOSTABLE MULTIVIBRATOR
Number of data clock inputs2
Output polarityCOMPLEMENTARY
propagation delay TPD315 ns
M54HC123/123A
M74HC123/123A
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR
.
.
.
.
.
.
.
.
.
HIGH SPEED
t
PD
= 25 ns (TYP) at V
CC
= 5V
LOW POWER DISSIPATION
STANDBY STATE I
CC
=4
µA
(MAX.) AT T
A
=25°C
ACTIVE STATE I
CC
= 200
µA
(TYP.) AT V
CC
=5V
HIGH NOISE IMMUNITY
V
NIH
= V
NIL
= 28 % V
CC
(MIN.)
OUTPUT DRIVE CAPABILITY
10 LSTTL LOADS
SYMMETRICAL OUTPUT IMPEDANCE
I
OH
= I
OL
= 4 mA (MIN.)
BALANCED PROPAGATION DELAYS
t
PLH
= t
PHL
WIDE OPERATING VOLTAGE RANGE
V
CC
(OPR) = 2 V TO 6 V
WIDE OUTPUT PULSE WIDTH RANGE
t
WOUT
= 120 ns
60 s OVER AT V
CC
= 4.5 V
PIN AND FUNCTION COMPATIBLE WITH
54/74LS123
B1R
(Plastic Package)
F1R
(Ceramic Package)
M1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M54HCXXXF1R
M74HCXXXM1R
M74HCXXXB1R
M74HCXXXC1R
DESCRIPTION
The M54/74HC123 is a high speed CMOS MONO-
STABLE multivibrator fabricated with silicon gate
C
2
MOS technology. It achieves the high speed
operation similar to equivalent LSTTL while main-
taining the CMOS low power dissipation. There are
two trigger inputs, A INPUT (negative edge) and 8
INPUT (positive edge). These inputs are valid for
slow rising/falling signals, (tr = tf = I sec). The device
may also be triggered by using the CLR input (posi-
tive-edge) because of the Schmitt-trigger input ;
after triggering the output maintains the MONO-
STABLE state for the time period determined by the
external resistor Rx and capacitor Cx. When Cx
10nF and Rx
10KΩ, the output pulse width value
is approssimatively given by the formula: t
w(out)
= K
Cx
Rx.
Two different pulse width constant are available:
K
0.45 for HC123 K
1 for HC123A.
Taking CLR low breaks this MONOSTABLE
STATE. If the next trigger pulse occurs during the
MONOSTABLEperiod it makes the MONOSTABLE
period longer. Limit for values of Cx and Rx :
Cx : NO LIMIT
Rx : V
CC
< 3.0 V 5 K
to 1 M
V
CC
3.0 V 1 K
to 1 M
All inputs are equipped with protection circuits
PIN CONNECTIONS
(top view)
NC =
No Internal
Connection
October 1993
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