XD74LS147 – Priority Encoder – Xinluda

The Xinluda XD74LS147 is a 10-line-to-4-line priority encoder that encodes nine data inputs to 8-4-2-1 BCD outputs in a DIP-16 package. Available for RFQ from Pacific Component Xchange.

The XD74LS147 from Xinluda is a 10-line-to-4-line priority encoder built on the proven 74LS low-power Schottky TTL logic family. It encodes nine active-low data inputs into a four-line (8-4-2-1) BCD output, with priority decoding that guarantees only the highest-order active input is encoded. The implied decimal-zero condition requires no input, since zero is encoded when all nine data lines are at a high logic level. This makes the XD74LS147 a direct, pin-compatible alternative to the classic SN74LS147 for keyboard encoding, interrupt prioritization, and decimal-to-BCD conversion tasks.

Key Features

• 10-line-to-4-line priority encoder (nine data inputs to four-line 8-4-2-1 BCD)
• Priority decoding ensures only the highest-order data line is encoded
• Supply voltage range: 4.75 V to 5.25 V (nominal 5 V)
• Typical propagation delay: 18 ns (at 5 V, 15 pF load)
• High-level output current: -400 uA; low-level output current: 8 mA
• Operating free-air temperature range: 0 C to 70 C
• 16-pin DIP (DIP-16) through-hole package
• RoHS compliant

Applications

• Decimal-to-BCD priority encoding
• Keyboard and keypad encoding
• Interrupt request prioritization in microprocessor systems
• Code conversion and data-line multiplexing logic
• Legacy TTL board repair and retrofit

Why Source XD74LS147 from Pacific Component Xchange

The XD74LS147 is a niche 74LS-family logic device with limited authorized-distributor coverage, which can make it difficult to source in production quantities. Pacific Component Xchange specializes in hard-to-find and obsolete power-management ICs and logic components, giving engineers and buyers a reliable path to parts that mainline catalogs no longer stock in depth. Every order is backed by our authenticity and quality-assurance processes, and we ship globally to support both prototype and volume builds. Request a quote (RFQ) for the XD74LS147 today and our sourcing team will respond with current availability, lead time, and pricing.