Alternatives to onsemi DM74LS123N

onsemi DM74LS123N and its qualified second sources, compared on form, fit and function, stock, lifecycle and price — the same checks Parter runs inside a BOM.

Equivalent and substitute parts for onsemi DM74LS123N

DM74LS123N compared against its qualified second sources
	DM74LS123Nonsemi	CD74HCT123ETexas Instruments	SN74LS123NTexas Instruments
FFF Compatibility
AI Summary	DM74LS123N by onsemi: Monostable Multivibrator 45 ns 16-PDIP.	This is a High-speed CMOS (HCT) alternative that features LSTTL-compatible inputs. It offers a low-power modern upgrade while maintaining 100% pin-compatibility and logic level compliance in 5V systems. Significantly lower static power consumption due to CMOS technology TTL-compatible inputs (HCT) allow direct interfacing with LSTTL outputs without logic level translation Much wider operating temperature range (-55°C to +125°C vs 0°C to 70°C) Slightly different external component value-to-pulse-width calculations (K-factor) which may require adjusting external resistor and capacitor values. Symmetrical ±4mA output drive capability differs from the asymmetrical -0.4mA/+8mA drive of the original LSTTL part.	This is the direct, active drop-in replacement from Texas Instruments. It belongs to the same 74LS series, maintains 100% pinout and logical compatibility, and runs on the same 5V rail. Direct drop-in replacement with exact same pinout Same Low-Power Schottky (LSTTL) logic family and 5V operating voltage Active lifecycle status from a tier-1 manufacturer (Texas Instruments) Slightly faster propagation delay (28 ns vs 45 ns) which is generally acceptable but should be verified in delay-critical circuits.
Lifecycle Status	Obsolete	Active	Active
Market Availability	Discontinued	In stock	In stock
REACH	REACH	REACH	REACH
RoHS	RoHS	RoHS	RoHS
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Related parts

Part	Market availability	Lifecycle	Alternatives available
DM74LS132Nonsemi	Discontinued	Obsolete	4Alternatives availableSee Alternatives
SN74LS123Nonsemi	Discontinued	Obsolete	3Alternatives availableSee Alternatives
SN74LS13NTexas Instruments	Discontinued	Obsolete	3Alternatives availableSee Alternatives
SN74LS138NTexas Instruments	In stock	Active	6Alternatives availableSee Alternatives
SN74LS123Donsemi	Discontinued	Obsolete	5Alternatives availableSee Alternatives
DM74ALS00ANonsemi	Discontinued	Obsolete	4Alternatives availableSee Alternatives

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