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PDF U74HC123 Data sheet ( Hoja de datos )
| Número de pieza | U74HC123 | |
| Descripción | DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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UNISONIC TECHNOLOGIES CO., LTD
U74HC123
CMOS IC
DUAL RETRIGGERABLE
MONOSTABLE
MULTIVIBRATOR WITH
RESET
SOP-16
DESCRIPTION
The U74HC123 is high-speed Si-gate CMOS device and is pin
compatible with low power Schottky TTL (LSTTL).
The U74HC123 is a dual retriggerable monostable
multivibrator with output pulse width control by three methods.
The basic pulse time is programmed by selection of an external
resistor (REXT) and capacitor (CEXT).
Once triggered, the basic output pulse width may be extended
TSSOP-16
by retriggering the gated active LOW-going edge input( n A ) or
the active HIGH-going edge input (nB). By repeating this process,
the output pulse period (nQ=HIGH, n Q =LOW) can be made as long as desired. Alternatively an output delay can be
terminated at any time by a LOW-going edge on input nRD , which also inhibits the triggering.
An internal connection from nRD to the input gates makes it possible to trigger the circuit by a positive-going
signal at input nRD as shown in the function table. The basic output pulse width is essentially determined by the
values of the external timing components REXT and CEXT.
Schmitt-trigger action in the n A and nB inputs, makes the circuit highly tolerant to slower input rise and fall
times.
FEATURES
* DC triggered from active HIGH or active LOW inputs
* Retriggerable for very long pulses up to 100% duty factor
* Direct reset terminates output pulse
* Schmitt-trigger action on all inputs except for the reset input
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
U74HC123L-S16-R
U74HC123G-S16-R
U74HC123L-S16-T
U74HC123G-S16-T
U74HC123L-P16-R
U74HC123G-P16-R
U74HC123L-P16-T
U74HC123G-P16-T
Package
SOP-16
SOP-16
TSSOP-16
TSSOP-16
Packing
Tape Reel
Tube
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2013 Unisonic Technologies Co., Ltd
1 of 10
QW-R502-A10.A
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1 page  
U74HC123
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VCC or GND Current
VCC
-0.5 ~ 7
V
ICC ±50 mA
Output Current
Input Clamp Current
IOUT ±25 mA
IIK ±20 mA
Output Clamp Current
Storage Temperature
IOK
TSTG
±20
-65 ~ + 150
mA
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Supply Voltage
High-level Input Voltage
Low-level Input Voltage
Input Voltage
Output Voltage
Input Transition Rise and Fall Rate
nRD Input
Ambient Temperature
SYMBOL
VCC
VIH
VIL
VIN
VOUT
△t/△V
Tamb
TEST CONDITIONS
VCC=2V
VCC=4.5V
VCC=6V
VCC=2V
VCC=4.5V
VCC=6V
VCC=2V
VCC=4.5V
VCC=6V
MIN TYP MAX UNIT
256V
1.5 1.2
3.15 2.4
V
4.2 3.2
0.8 0.5
2.1 1.35 V
2.8 1.8
0
VCC
V
0
VCC
V
1000
500 ns
400
-40 +25 +125 °C
ELECTRICAL CHARACTERISTICS (TA =25°C , unless otherwise specified)
PARAMETER
Output Voltage High-Level
Output Voltage Low-Level
Input Leakage Current
Quiescent Supply Current
Input Capacitance
SYMBOL
VOH
VOL
II(LEAK)
ICC
CI
TEST CONDITIONS
VCC=2V, IOH=-20μA
VCC=4.5V, IOH=-20μA
VCC=6V, IOH=-20μA
VCC=4.5V, IOH=-4mA
VCC=6V, IOH=-5.2mA
VCC=2V, IOL=20μA
VCC=4.5V, IOL=20μA
VCC=6V, IOL=20μA
VCC=4.5V, IOL=4mA
VCC=6V, IOL=5.2mA
VCC=6V, VIN= VCC or GND
VCC=6V, VIN=VCC or GND, IOUT=0
MIN
1.9
4.4
5.9
3.98
5.48
TYP MAX UNIT
2
4.5
6V
4.32
5.81
0 0.1
0 0.1
0 0.1 V
0.15 0.26
0.16 0.26
±0.1 μA
8 μA
3.5 pF
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 10
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| PDF Descargar | [ Datasheet U74HC123.PDF ] | |
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