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Texas Instruments SN74AHC244N — Logic ICs

SN74AHC244N TI 74AHC Buffer, Non-Inverting, 3-State, 20-DIP

MPNSN74AHC244N
End of Life

Texas Instruments 74AHC series SN74AHC244N, Buffer Non-Inverting, 3-State output, 2V to 5.5V supply, 8mA sink/source, -40°C to 125°C, 20-DIP (0.300", 7.62mm) through-hole package.

$0.86Ref. price · indicative, final on quote
Texas Instruments SN74AHC244N datasheet (PDF)
Packaging20-DIP (0.300", 7.62mm)
RoHSROHS3 Compliant
Series74AHC
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SN74AHC244N specifications
ParameterValue
Series74AHC
Logic typeBuffer, Non-Inverting
Output type3-State
MountingThrough Hole
Supply voltage2V ~ 5.5V
Current - output high, low8mA, 8mA
Operating temperature-40°C ~ 125°C (TA)
PackageTube
Case20-DIP (0.300\", 7.62mm)
Number of elements2
Number of bits per element4

Product details

The through-hole 20-DIP (PDIP) package suits prototyping, legacy board repairs, and environments where socketed or high-vibration mounting is preferred.

The 2V to 5.5V supply range lets this part bridge 3.3V and 5V domains without a level translator, provided the input thresholds align. The 8mA output drive per pin (both high and low) is enough for CMOS logic fan-out of 10–15 loads or driving a standard LED through a current-limiting resistor, but not for relays or high-current loads.

For new designs, the 74AHC family remains a standard-logic workhorse; no immediate second-source concern, though the through-hole PDIP package is less common in high-volume surface-mount builds.

Frequently asked questions

Is SN74AHC244N a direct replacement for SN74HC244N?

The SN74AHC244N is a higher-speed, lower-power evolution of the HC family. Both are 3-state non-inverting octal buffers in the same 20-DIP footprint and share the same pinout. The AHC variant offers faster propagation delay and lower quiescent current at the same supply voltage, but check the input threshold levels — AHC uses CMOS thresholds, while HC uses TTL-compatible thresholds — which may matter in mixed-logic designs.

Can SN74AHC244N drive LEDs directly?

Yes, each output can sink or source 8mA, which is sufficient to drive a standard LED with a series current-limiting resistor. For higher-current LEDs or multiple LEDs per output, an external transistor buffer is needed.

Is SN74AHC244N RoHS compliant?

Yes, the SN74AHC244N is RoHS3 compliant.