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Texas Instruments SN74HCT139N — Discrete Semiconductors

SN74HCT139N Decoder/Demultiplexer, 1 x 2:4, 16-DIP, Active

MPNSN74HCT139N
End of Life

Texas Instruments SN74HCT139N, 74HCT series Decoder/Demultiplexer, 1 x 2:4 circuit, 2 independent circuits, Through Hole 16-DIP (0.300", 7.62mm), 4.5V ~ 5.5V supply, -40°C ~ 85°C operating temperature.

$0.78Ref. price · indicative, final on quote
Texas Instruments SN74HCT139N datasheet (PDF)
Packaging16-DIP (0.300", 7.62mm)
RoHSROHS3 Compliant
Series74HCT
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SN74HCT139N specifications
ParameterValue
TypeDecoder/Demultiplexer
Series74HCT
MountingThrough Hole
Supply voltage4.5V ~ 5.5V
Voltage supply sourceSingle Supply
Current - output high, low4mA, 4mA
Operating temperature-40°C ~ 85°C
Circuit1 x 2:4
PackageTube
Case16-DIP (0.300\", 7.62mm)
Independent circuits2

Product details

Industrial temperature and through-hole package — fit for legacy and harsh environments

Rated -40°C to 85°C, this part handles outdoor telecom cabinets, factory-floor PLC racks, and engine-bay electronics where commercial-grade parts drift or fail. The 16-DIP (0.300", 7.62 mm) through-hole footprint is a standard on legacy control boards and retrofit cards.

Production status and sourcing posture

The SN74HCT139N is listed as Active, with a ROHS3 compliance level. No end-of-life notice or last-time-buy window has been issued. For volume production or a BOM line that needs this exact decoder, we can quote against an RFQ with current availability and pricing confirmed at quote time.

Frequently asked questions

Can SN74HCT139N replace 74LS139?

Yes, the SN74HCT139N is pin-compatible with the 74LS139 and runs on the same 5 V supply. The HCT family has TTL-compatible inputs, so it drops directly into a 74LS139 socket. The main difference is lower power consumption (CMOS) and slightly different input thresholds — verify with the datasheet if the old design relied on LS-specific noise margins.

Is SN74HCT139N equivalent to 74HCT139?

Yes, SN74HCT139N is the Texas Instruments ordering code for a standard 74HCT139 in a 16-pin DIP package. The 'SN' prefix is TI's own code; the core device is the industry-standard 74HCT139 dual 2:4 decoder/demultiplexer.