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Número de pieza | M74HC423 | |
Descripción | DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR | |
Fabricantes | ST Microelectronics | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de M74HC423 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
No Preview Available ! M54HC423/423A
M74HC423/423A
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR
. HIGH SPEED
tPD = 25 ns (TYP) at VCC = 5V
. LOW POWER DISSIPATION
STANDBY STATE ICC=4 µA (MAX.) AT TA=25°C
ACTIVE STATE ICC = 700 µA (MAX.) AT VCC=5V
. HIGH NOISE IMMUNITY
VNIH = VNIL = 28 % VCC (MIN.)
. OUTPUT DRIVE CAPABILITY
10 LSTTL LOADS
. SYMMETRICAL OUTPUT IMPEDANCE
IOH = IOL = 4 mA (MIN.)
. BALANCED PROPAGATION DELAYS
tPLH = tPHL
. WIDE OPERATING VOLTAGE RANGE
VCC (OPR) = 2 V TO 6 V
. WIDE OUTPUT PULSE WIDTH RANGE
tWOUT = 120 ns ∼ 60 s OVER AT VCC = 4.5 V
. PIN AND FUNCTION COMPATIBLE WITH
54/74LS423
B1R
(Plastic Package)
F1R
(Ceramic Package)
M 1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M54HCXXXF1R M74HCXXXM1R
M74HCXXXB1R M74HCXXXC1R
DESCRIPTION
PIN CONNECTIONS (top view)
The M54/74HC423/423A are high speed CMOS
MONOSTABLE multivibrators fabricated with
silicon gate C2MOS technology.
They achieve the high speed operation similar to
equivalent LSTTL while maintaining the CMOS low
power dissipation. There are two trigger inputs, A
INPUT (negative edge) and B INPUT (positive
edge). These inputs are valid for rising/falling
signals, (tr – tf – 1 sec). After triggering the output
maintains the MONOSTABLE state for the time
period determined by the external resistor Rx and
capacitor Cx.
Two different pulse width constant are available:
K ≅ 0.46 for HC423 K ≅ 1 for HC423A.
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 : VCC < 3.0 V 5 K Ω to 1 M Ω
VCC ≥ 3.0 V 1 K Ω to 1 M Ω
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
NC =
No Internal
Connection
October 1993
1/14
1 page M54/M74HC423/423A
PIN DESCRIPTION
PIN No
1, 9
2, 10
3, 11
4, 12
7
13, 5
14, 6
15
8
16
SYMBOL
1A, 2A
1B, 2B
1CLR,
2CLR
1Q, 2Q
2REXT/CEXT
1Q, 2Q
1CEXT
2CEXT
1REXT/CEXT
GND
VCC
NAME AND FUNCTION
Trigger Inputs (Negative
Edge Triggered)
Trigger Inputs (Positive
Edge Triggered)
Direct Reset (Active LOW)
Outputs (Active LOW)
External Resistor
Capacitor Connection
Outputs (Active HIGH)
External Capacitor
Connection
External Resistor
Capacitor Connection
Ground (0V)
Positive Supply Voltage
IEC LOGIC SYMBOL
ABSOLUTE MAXIMUM RATING
Symbol
Parameter
Value
Unit
VCC Supply Voltage
-0.5 to +7
V
VI DC Input Voltage
-0.5 to VCC + 0.5
V
VO DC Output Voltage
-0.5 to VCC + 0.5
V
IIK DC Input Diode Current
± 20 mA
IOK DC Output Diode Current
± 20 mA
IO DC Output Source Sink Current Per Output Pin
ICC or IGND DC VCC or Ground Current
± 25 mA
± 50 mA
PD Power Dissipation
Tstg Storage Temperature
500 (*)
-65 to +150
mW
oC
TL Lead Temperature (10 sec)
300 oC
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition isnotimplied.
(*) 500 mW: ≅ 65 oC derate to 300 mW by 10mW/oC: 65 oC to 85 oC
5/14
5 Page DIM.
A
B
D
E
e3
F
G
H
L
M
N
P
Q
M54/M74HC423/423A
Ceramic DIP16/1 MECHANICAL DATA
MIN.
0.38
2.29
0.4
1.17
0.22
0.51
7.8
mm
TYP.
3.3
17.78
MAX.
20
7
2.79
0.55
1.52
0.31
1.27
10.3
8.05
5.08
MIN.
0.015
0.090
0.016
0.046
0.009
0.020
0.307
inch
TYP.
0.130
0.700
MAX.
0.787
0.276
0.110
0.022
0.060
0.012
0.050
0.406
0.317
0.200
P053D
11/14
11 Page |
Páginas | Total 14 Páginas | |
PDF Descargar | [ Datasheet M74HC423.PDF ] |
Número de pieza | Descripción | Fabricantes |
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