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Texas Instruments SN74S05N — Discrete Semiconductors

SN74S05N Hex Inverter, Open Collector, 14-DIP, 74S Series

MPNSN74S05N
End of Life

Texas Instruments 74S series, SN74S05N — hex inverter with open-collector outputs, 14-DIP (0.300") through-hole package, 4.75V–5.25V supply, 0°C to 70°C, 20mA sink per output, 7.5ns propagation delay at 5V/50pF.

$2.04Ref. price · indicative, final on quote
Texas Instruments SN74S05N datasheet (PDF)
Packaging14-DIP (0.300", 7.62mm)
RoHSROHS3 Compliant
Series74S
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SN74S05N specifications
ParameterValue
Series74S
Logic typeInverter
MountingThrough Hole
Supply voltage4.75V ~ 5.25V
Current - output high, low-, 20mA
I/O channels1
Operating temperature0°C ~ 70°C
PackageTube
FeaturesOpen Collector
Case14-DIP (0.300\", 7.62mm)
Number of circuits6
Input logic level - low0.8V
Input logic level - high2V
Max propagation delay @ v, max CL7.5ns @ 5V, 50pF

Product details

The Texas Instruments SN74S05N packs six independent inverter gates with open-collector outputs into a single 14-pin DIP package. Each gate accepts one input and, because the output transistor collector is left uncommitted, you can pull it up to a different voltage than the supply rail — or wire multiple outputs together for a wired-OR configuration. The 20 mA sink rating per output gives enough drive for small relays, indicator LEDs, or pulling down a bus line. Supply sits at 5 V nominal (4.75 V to 5.25 V range), and the 74S Schottky family delivers a 7.5 ns propagation delay at 5 V with a 50 pF load — fast enough for moderate-speed glue logic but not as power-hungry as the 74F series.

Where it fits — and where it doesn't

The through-hole 14-DIP package is board-rewire friendly for prototypes and legacy PCB layouts.

The ROHS3 compliance covers the latest environmental directives.

Frequently asked questions

Is SN74S05N obsolete?

No — the SN74S05N is listed as Active in production. No end-of-life notification has been issued. It remains a current-production part from Texas Instruments.

SN74S05N vs SN74LS05N — what's the difference?

Both are hex open-collector inverters in the same pinout. The 74S version (SN74S05N) uses Schottky clamping for faster switching — 7.5 ns propagation delay at 5V/50pF — while the 74LS version is slower (about 15 ns) but draws less supply current. Choose 74S when timing margin is tight; choose 74LS for lower power in less speed-critical paths.

What is a functional equivalent for SN74S05N?

The SN74LS05N is a direct pin-compatible alternative in the 74LS family with the same six open-collector inverters. For a surface-mount footprint, the SN74ALS38BNSR is a quad 2-input NAND with open-collector outputs — different logic function but same open-drain capability. No single exact second-source exists; the best fit depends on your logic function and package requirements.