XD74LS21 – Logic Gate (Dual 4-Input AND) – Xinluda

The Xinluda XD74LS21 is a dual 4-input positive AND gate in the 74LS low-power Schottky TTL family, supplied in a 14-pin DIP package. Available for RFQ from Pacific Component Xchange.

The Xinluda XD74LS21 is a dual 4-input positive AND gate built on the industry-standard 74LS (low-power Schottky TTL) logic architecture. Housed in a 14-pin dual in-line package (DIP-14), it integrates two independent 4-input AND gates, each driving its output high only when all four of its inputs are at a logic-high level. As a pin-for-pin and function-compatible equivalent of the classic 74LS21 / 7421, it is widely used as a drop-in replacement in legacy and cost-sensitive digital designs.

Key Features

• Two independent 4-input positive AND gates per package
• 74LS low-power Schottky TTL logic family
• Standard 5 V TTL operation (4.75 V to 5.25 V recommended supply range)
• Compatible with the industry-standard 74LS21 / 7421 pinout and function
• 14-pin DIP (DIP-14) through-hole package
• Commercial operating temperature range (0°C to 70°C)

Applications

• Combinational logic and address/data decoding
• Strobe and enable signal gating
• Legacy board repair and design refresh
• Industrial control and instrumentation logic
• Educational and prototyping digital circuits

Why Source XD74LS21 from Pacific Component Xchange

The Xinluda XD74LS21 is an asia-brand logic part with limited authorized-distributor availability, which can make it difficult to source through mainstream channels. Pacific Component Xchange is an independent distributor specializing in hard-to-find and obsolete power-management ICs, optocouplers, and logic devices. We help engineers and buyers secure scarce 74LS-series components for production, maintenance, and end-of-life builds.

Every order is backed by our authenticity and quality-assurance process, and we ship globally to support your schedule. Because this is a request-for-quote item, pricing and lead time are confirmed per order. Submit an RFQ to Pacific Component Xchange today for current availability, quantity pricing, and delivery on the XD74LS21.