XD74LS148 – 8-Line to 3-Line Priority Encoder – Xinluda

The Xinluda XD74LS148 is an 8-line to 3-line octal priority encoder from the 74LS TTL logic family, supplied in a 16-pin DIP package with active-low inputs/outputs and cascade (EI/EO) capability.

The XD74LS148 from Xinluda is an 8-line to 3-line octal priority encoder belonging to the popular 74LS low-power Schottky TTL logic family. It encodes eight active-low data inputs into a 3-bit (4-2-1) binary code, with priority decoding that guarantees only the highest-order asserted input is reflected on the outputs. Built-in cascading circuitry (enable input EI and enable output EO) allows multiple devices to be chained for octal expansion without additional external logic. The “XD” prefix denotes the through-hole DIP-16 version of this part (the equivalent SOP-16 surface-mount variant is marketed as XL74LS148).

Key Features

• Function: 8-line to 3-line (octal) priority encoder, 74LS148 family
• Priority decoding ensures only the highest-order active input is encoded
• Active-low data inputs and active-low (4-2-1) binary outputs
• Cascade enable input (EI) and enable output (EO) for octal expansion without external circuitry
• Recommended supply voltage: 4.75 V to 5.25 V (nominal 5 V)
• Operating free-air temperature range: 0°C to 70°C
• Low-power Schottky TTL technology
• Package: 16-pin plastic dual in-line package (DIP-16)

Applications

• Keyboard and keypad encoding
• Interrupt priority resolution / interrupt controllers
• Code conversion and data multiplexing
• Digital control and instrumentation logic
• Legacy and retrofit TTL system designs

Why Source XD74LS148 from Pacific Component Xchange

The Xinluda XD74LS148 is a specialty logic part with little to no authorized-distributor stock, which makes it difficult to obtain through mainstream channels. Pacific Component Xchange is an independent distributor focused on hard-to-find and obsolete power-management ICs and logic devices. We help engineers and buyers secure scarce parts like the XD74LS148 with attention to authenticity, source traceability, and reliable global shipping. Whether you need a small prototype quantity or volume for a production run, our team can locate inventory and lock in pricing. Request a quote (RFQ) today and our sourcing specialists will respond with availability, lead time, and pricing for the XD74LS148.