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Texas Instruments SN74ALS244C-1N — Logic ICs

SN74ALS244C-1N Buffer Non-Inverting 3-State, 20-DIP

MPNSN74ALS244C-1N
End of Life

Texas Instruments 74ALS series SN74ALS244C-1N, Buffer Non-Inverting, 3-State output, 4.5V ~ 5.5V supply, 15/24mA drive, 0°C ~ 70°C, 20-DIP (0.300", 7.62mm) through hole, 20-PDIP.

$1.45Ref. price · indicative, final on quote
Texas Instruments SN74ALS244C-1N datasheet (PDF)
Packaging20-DIP (0.300", 7.62mm)
RoHSROHS3 Compliant
Series74ALS
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SN74ALS244C-1N specifications
ParameterValue
Series74ALS
Logic typeBuffer, Non-Inverting
Output type3-State
MountingThrough Hole
Voltage4.5V ~ 5.5V
Current - output high, low15mA, 24mA
Operating temperature0°C ~ 70°C (TA)
PackageTube
Case20-DIP (0.300\", 7.62mm)
Number of elements2
Number of bits per element4

Product details

Buffer for 5V bus lines — what the 15/24 mA drive tells you

The Texas Instruments SN74ALS244C-1N is a 74ALS-series octal buffer with non-inverting outputs and 3-state control, packaged in a 20-pin DIP for through-hole assembly. The output drive capability — 15 mA source, 24 mA sink — is typical for the ALS family and sufficient for driving multiple TTL loads on a backplane or buffering address/data lines in legacy 5V systems.

For production BOMs that still specify a through-hole 5V buffer, this part remains a current, orderable line item through independent distribution — no need to qualify a drop-in substitute yet.

20-DIP package — board fit for legacy or repair work

If your layout expects a 20-pin DIP footprint with 0.1" row spacing, this part drops in without adapter. No surface-mount variant is listed — this is a through-hole-only device.

Frequently asked questions

Can SN74ALS244C-1N replace 74LS244?

The SN74ALS244C-1N is a direct functional replacement for the 74LS244 in most 5V TTL systems. Both are octal non-inverting buffers with 3-state outputs in a 20-DIP package. The ALS variant offers lower power per gate and higher output drive (15/24 mA vs typical LS drive levels). Pinout is identical, so it drops into the same socket without board changes.