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Texas Instruments SN74ALS373ADWR — Logic ICs

SN74ALS373ADWR D-Type Transparent Latch, 6ns, 20-SOIC

MPNSN74ALS373ADWR
End of Life

Texas Instruments 74ALS series, SN74ALS373ADWR, D-Type Transparent Latch, 8:8 circuit, Tri-State outputs, 4.5V ~ 5.5V supply, 6ns propagation delay, 20-SOIC (0.295", 7.50mm Width), 0°C ~ 70°C operating temperature.

$1.16Ref. price · indicative, final on quote
Texas Instruments SN74ALS373ADWR datasheet (PDF)
Packaging20-SOIC (0.295", 7.50mm Width)
RoHSROHS3 Compliant
Series74ALS
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SN74ALS373ADWR specifications
ParameterValue
Series74ALS
Logic typeD-Type Transparent Latch
Output typeTri-State
MountingSurface Mount
Supply voltage4.5V ~ 5.5V
Current - output high, low2.6mA, 24mA
Operating temperature0°C ~ 70°C
Circuit8:8
PackageTape & Reel (TR); Cut Tape (CT)
Case20-SOIC (0.295\", 7.50mm Width)
Independent circuits1
Delay time - propagation6ns

Product details

Octal transparent latch for 5V bus isolation

The Texas Instruments SN74ALS373ADWR is an octal D-type transparent latch with tri-state outputs from the 74ALS family. It holds eight bits of data when the latch-enable signal goes low, and the tri-state outputs let multiple devices share a common bus without contention.

No imminent end-of-life notice on this line. For dual-sourcing considerations, the 74FCT573APC from the 74FCT series offers a functionally similar D-type transparent latch but in a through-hole package and with an 8.5ns propagation delay; the pinout is not guaranteed compatible, so verify the footprint before substituting.

Frequently asked questions

What is the difference between SN74ALS373ADW and SN74ALS373ADWR?

The only difference is the packaging medium. SN74ALS373ADW ships in tubes; SN74ALS373ADWR ships in tape and reel. The die, electrical specs, and 20-SOIC package are identical. Choose the 'R' suffix for automated assembly lines, the non-R for hand-assembly or low-volume builds.

What is the propagation delay of SN74ALS373ADWR?

The propagation delay is 6ns from input to output under standard test conditions. This is fast enough for most 5V microprocessor buses but slower than 74FCT or 74AC series equivalents.

What is the closest functional second-source for SN74ALS373ADWR?

The 74FCT573APC is a functionally similar D-type transparent latch from the 74FCT series, but it comes in a through-hole package and has an 8.5ns propagation delay. Verify pin compatibility before substituting — the 20-SOIC footprint of SN74ALS373ADWR is not the same as the through-hole DIP of the 74FCT573APC.