74240 Octal Buffer Line Driver IC

The 74HC240 is an octal buffer/line driver IC, used to boost drive strength and isolate logic signals across two independent 4-bit sections, each with its own active-low output-enable control. This makes it useful for driving multiple downstream loads or long PCB traces from a microcontroller pin that can’t supply enough current on its own.

As a buffer/line driver rather than a latch or counter, it passes the logic state of its inputs through to its outputs (inverted, in the case of the 74240 family) without storing any state, making it purely a signal-conditioning component in a digital circuit.

For exact electrical ratings — supply voltage range, propagation delay, output drive current, and other parameters — refer to the manufacturer’s datasheet, since exact figures vary by logic family variant (e.g. HC vs LS).

Features:
1. Octal buffer / line driver IC
2. Two independent 4-bit sections
3. Active-low output-enable control per section
4. Boosts drive strength for downstream loads or long traces
5. Signal isolation for microcontroller outputs
6. Refer to datasheet for full electrical specifications