M54HC423A 반도체 회로 부품 판매점
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR
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 ST Microelectronics |
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
M54/M74HC423/423A
SYSTEM DIAGRAM
TIMING CHART
2/14
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국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
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IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈
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관련 데이터시트
M54HC423
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR - ST Microelectronics
M54HC423
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR - ST Microelectronics
M54HC423A
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR - ST Microelectronics
M54HC423A
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR - ST Microelectronics