XL74LS148 – Logic IC – Priority Encoder – Xinluda

The Xinluda XL74LS148 is an 8-line to 3-line octal priority encoder in the 74LS TTL logic family, supplied in a surface-mount SOP-16 package with active-low inputs/outputs and cascading enable lines for octal expansion.

The XL74LS148 from Xinluda is an 8-line-to-3-line priority encoder built on the proven 74LS low-power Schottky TTL architecture. It encodes eight active-low data inputs into a 3-bit active-low binary (octal) code, ensuring that only the highest-order asserted input is encoded. Supplied in a surface-mount SOP-16 package, the XL74LS148 is the SOP variant of the Xinluda 74LS148 family (the DIP-16 version is offered as the XD74LS148).

On-chip cascading circuitry, comprising an enable input (EI) and enable output (EO), allows multiple devices to be cascaded for octal expansion without additional external logic. A group-select (GS) output indicates when one or more of the data inputs is active. These features make the XL74LS148 a versatile choice for interrupt encoding, keyboard scanning, and code conversion in TTL-based systems.

Key Features

• 8-line to 3-line octal priority encoder (encodes 8 data lines to 3-line binary)
• Priority decoding ensures only the highest-order active data line is encoded
• Data inputs and outputs are active at the low logic level
• Cascading enable input (EI) and enable output (EO) for octal expansion without external circuitry
• Group-select (GS) output
• 74LS low-power Schottky TTL family
• Supply voltage (Vcc): 4.75 V to 5.25 V
• Low-level output current (IOL): 8 mA
• Operating free-air temperature: 0 C to +70 C
• Surface-mount SOP-16 package

Applications

• Priority interrupt controllers
• Keyboard and switch encoding
• Code conversion and data routing
• N-bit encoding in cascaded TTL systems
• Industrial and legacy digital control boards

Why Source XL74LS148 from Pacific Component Xchange

The Xinluda XL74LS148 is a request-for-quote line item with little to no authorized-distributor stock, making it a genuinely hard-to-find part for engineers maintaining or building 74LS-based designs. Pacific Component Xchange specializes in sourcing scarce, obsolete, and allocation-constrained logic and power-management ICs through a vetted global supply network.

Every XL74LS148 we supply is subject to our authenticity and counterfeit-avoidance procedures, and we ship worldwide to support production lines, repair operations, and last-time-buy needs. If you need the XL74LS148 – or the DIP-16 XD74LS148 equivalent – submit an RFQ to Pacific Component Xchange and our sourcing team will respond with availability, lead time, and pricing.