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Texas Instruments SN74ALS08D — Logic ICs

SN74ALS08D 74ALS Quad 2-Input AND Gate, 14 ns @ 5V

MPNSN74ALS08D
End of Life

Texas Instruments SN74ALS08D, 74ALS series, Quad 2-Input AND Gate, 14-SOIC, 4.5V~5.5V supply, 8 mA output sink, 14 ns propagation delay @ 5V/50pF, 0°C~70°C operating temperature.

$0.93Ref. price · indicative, final on quote
Texas Instruments SN74ALS08D datasheet (PDF)
Packaging14-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Series74ALS
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SN74ALS08D specifications
ParameterValue
Series74ALS
Logic typeAND Gate
MountingSurface Mount
Voltage4.5V ~ 5.5V
Current - output high, low400µA, 8mA
I/O channels2
Operating temperature0°C ~ 70°C
PackageTube
Case14-SOIC (0.154\", 3.90mm Width)
Number of circuits4
Input logic level - low0.8V
Input logic level - high2V
Max propagation delay @ v, max CL14ns @ 5V, 50pF

Product details

Quad 2-input AND gate in 14-SOIC — 74ALS logic for 5 V buses

The Texas Instruments SN74ALS08D packs four independent 2-input AND gates in a 14-SOIC package, running on a 4.5 V to 5.5 V supply. It is a standard 74ALS-series part, so it mates directly with 5 V TTL and other ALS/AS logic families on the same backplane. The 14 ns propagation delay at 5 V, 50 pF sets the timing closure window for address decoding, strobe generation, or any combinatorial glue logic where a clean AND function is needed without the faster (but higher-power) 74F or 74AC alternatives.

Output drive and input thresholds

Each gate sinks 8 mA and sources 400 µA. The 8 mA sink handles multiple standard TTL loads or a single low-current LED with a series resistor; the 400 µA source is typical for driving CMOS inputs or high-impedance bus receivers. Input low threshold is 0.8 V, high threshold is 2 V — standard 5 V TTL-compatible levels that guarantee noise margin against a 5 V rail.

This suits indoor equipment, benchtop instrumentation, telecom line cards in conditioned racks, and general-purpose industrial control panels where the ambient stays within that band. Not specified for automotive or extended industrial environments.

No last-time-buy pressure on this line.

Frequently asked questions

What is the propagation delay of SN74ALS08D?

The maximum propagation delay is 14 ns at 5 V supply with a 50 pF load. That figure governs the timing budget for address decoding or clock gating in a 5 V bus — it is fast enough for most 8-bit and 16-bit systems but slower than the 5 ns of a 74F00 NAND gate.

Is SN74ALS08D compatible with 5V logic?

Yes, it operates on a 4.5 V to 5.5 V supply with TTL-compatible input thresholds (0.8 V low, 2 V high) and standard ALS output levels. It interfaces directly with 5 V TTL, ALS, AS, and HC logic families without level translation.

What is the equivalent of SN74ALS08D?

A functional equivalent in the same 74ALS family is the SN74ALS11ANS, which is a triple 3-input AND gate in a similar 14-pin surface-mount package. The SN74ALS08D is a quad 2-input gate; the SN74ALS11ANS is a triple 3-input gate — the logic function differs, so they are not pin-compatible drop-in replacements. For a faster quad 2-input NAND gate, the SN74F00DR offers 5 ns propagation delay but draws higher supply current.