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Texas Instruments CD74HC244E — Discrete Semiconductors

CD74HC244E Texas Instruments 74HC Buffer, 3-State, 20-DIP

MPNCD74HC244E
End of Life

Texas Instruments 74HC series Buffer, Non-Inverting, 3-State, 2V ~ 6V supply, 20-DIP (0.300", 7.62mm), Through Hole, -55°C ~ 125°C.

$0.97Ref. price · indicative, final on quote
Texas Instruments CD74HC244E datasheet (PDF)
Packaging20-DIP (0.300", 7.62mm)
RoHSROHS3 Compliant
Series74HC
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

CD74HC244E specifications
ParameterValue
Series74HC
Logic typeBuffer, Non-Inverting
Output type3-State
MountingThrough Hole
Supply voltage2V ~ 6V
Current - output high, low7.8mA, 7.8mA
Operating temperature-55°C ~ 125°C (TA)
PackageTube
Case20-DIP (0.300\", 7.62mm)
Number of elements2
Number of bits per element4

Product details

Board-level buffer for wide-temperature digital buses

The CD74HC244E is a dual 4-bit non-inverting buffer with 3-state outputs from the 74HC logic family, operating across a 2V to 6V supply range. It handles 7.8 mA source and sink per output, typical for driving bus lines or LED indicators in mixed-voltage 5V/3.3V systems.

Through-hole DIP integration and supply rails

Housed in a 20-pin DIP (0.300" body width, 7.62 mm row spacing), the CD74HC244E is a through-hole part that mates with standard DIP sockets or wave-solder holes on a 0.100" pitch grid. Supply voltage tolerance from 2V to 6V means the same BOM line works on a 3.3V microcontroller bus and a 5V legacy backplane — no separate regulator needed per voltage domain.

Frequently asked questions

Will CD74HC244E drop into a board designed for SN74LS645-1N?

No, the SN74LS645-1N is an 8-bit transceiver in a 20-DIP, while the CD74HC244E is a dual 4-bit buffer. Both are 20-pin DIP packages, but the pin functions differ — the CD74HC244E has two 4-bit sections with separate output-enable pins, whereas the SN74LS645-1N has direction and enable controls for a single 8-bit bus. A board wired for the transceiver needs a layout change to accept the buffer.