Specification	SN74LS423D

Current - Output High, Low [custom]	400 µA
Current - Output High, Low [custom]	8 mA
Independent Circuits	2
Logic Type	Monostable
Mounting Type	Surface Mount
Operating Temperature [Max]	70 °C
Operating Temperature [Min]	0 °C
Package / Case	16-SOIC
Package / Case [x]	0.154 in
Package / Case [y]	3.9 mm
Propagation Delay	28 ns
Schmitt Trigger Input	False
Supplier Device Package	16-SOIC
Voltage - Supply [Max]	5.25 V
Voltage - Supply [Min]	4.75 V

SN74LS423 Series

Dual Retriggerable Monostable Multivibrators

Part	Operating Temperature [Max]	Voltage - Supply [Min]	Voltage - Supply [Max]	Current - Output High, Low [custom]	Current - Output High, Low [custom]	Independent Circuits	Propagation Delay	Package / Case	Package / Case [x]	Package / Case [y]	Supplier Device Package	Mounting Type	Logic Type	Package / Case	Package / Case
Texas Instruments SN74LS423D	70 °C	4.75 V	5.25 V	400 µA	8 mA	2	28 ns	16-SOIC	0.154 in	3.9 mm	16-SOIC	Surface Mount	Monostable
Texas Instruments SN74LS423N	70 °C	4.75 V	5.25 V	400 µA	8 mA	2	28 ns	16-DIP			16-PDIP	Through Hole	Monostable	0.3 in	7.62 mm
Texas Instruments SN74LS423NG4	70 °C	4.75 V	5.25 V	400 µA	8 mA	2	28 ns	16-DIP			16-PDIP	Through Hole	Monostable	0.3 in	7.62 mm
Texas Instruments SN74LS423NSR	70 °C	4.75 V	5.25 V	400 µA	8 mA	2	28 ns	16-SOIC			16-SO	Surface Mount	Monostable	0.209 "	5.3 mm

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tube	440	$ 2.01
Texas Instruments	TUBE	1	$ 2.78
		100	$ 2.44
		250	$ 1.71
		1000	$ 1.38

Description

General part information

SN74LS423 Series

The 'LS422 and 'LS423 are identical to 'LS122 and 'LS123 except they cannot be triggered via clear.

These d-c triggered multivibrators feature output-pulse-width control by three methods. The basic pulse time is programmed by selection of external resistance and capacitance values (see typical application data). The 'LS422 contains an internal timing resistor that allows the circuits to be used with only an external capacitor, if so desired. Once triggered, the basic pulse width may be extended by retriggering the gated low-level-active (A) or high-level-active (B) inputs, or be reduced by use of the overriding clear. Figure 1 illustrates pulse control by retriggering and early clear.

The 'LS422 and 'LS423 have enough Schmitt hysteresis to ensure jitter-free triggering from the B input with transition rates as slow as 0.1 millivolt per nanosecond. The 'LS422 Rintis nominally 10 k ohms.

Documents

Technical documentation and resources

Retriggerable Monostable Multivibrators datasheet

Data sheet