Texas Instruments 74HCT series buffer, non-inverting, 3-state outputs, 20-DIP through-hole package, 4.5-5.5V supply, -55°C to 125°C temperature range.
| Parameter | Value |
|---|---|
| Series | 74HCT |
| Logic type | Buffer, Non-Inverting |
| Output type | 3-State |
| Mounting | Through Hole |
| Supply voltage | 4.5V ~ 5.5V |
| Current - output high, low | 6mA, 6mA |
| Operating temperature | -55°C ~ 125°C (TA) |
| Package | Tube |
| Case | 20-DIP (0.300\", 7.62mm) |
| Number of elements | 2 |
| Number of bits per element | 4 |
The CD74HCT241E is a dual 4-bit buffer with non-inverting logic and 3-state outputs, part of the 74HCT series from Texas Instruments. The 3-state output architecture allows the outputs to be placed in a high-impedance state, enabling bus sharing without contention — the OE control lines gate each 4-bit bank independently.
The SN74LS645-1N is a different logic family (74LS vs 74HCT) and a different function — it is an 8-bit transceiver, not a dual 4-bit buffer. The CD74HCT241E has two independent 4-bit elements with separate output-enable controls, while the SN74LS645-1N is a single 8-bit transceiver with a different pinout and a narrower temperature range (0°C to 70°C). These are not drop-in replacements without a board spin.