SN74LS244 Octal Buffer and Line Driver with 3-State Outputs
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Prices updated: 12 Oct 2026
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About this product
The SN74LS244 is a 74LS-series TTL octal buffer and line driver with eight non-inverting buffers split into two banks, each with an active-low output enable. It is used to drive bus lines, isolate circuits and add current drive between microcontrollers and logic or peripheral devices.
Specifications
- Logic family
- LS-TTL (74LS)
- Channels
- 8 (two banks of 4)
- Output type
- 3-state, non-inverting
- Supply voltage
- 4.75 V to 5.25 V
- Package
- DIP-20
Frequently asked questions
Can I use it with a 3.3 V microcontroller?
The device is specified for a 5 V supply (4.75 V to 5.25 V), so power it from 5 V. Check the input and output levels against your 3.3 V logic before connecting it.
How do I enable the outputs?
Pull the relevant output enable pin (1OE or 2OE) low to enable that bank of outputs. Drive it high to put the outputs in a high-impedance state so several devices can share a bus.
