XD74LS20 – Dual 4-Input NAND Gate Logic IC – Xinluda

The Xinluda XD74LS20 is a dual 4-input positive NAND gate from the 74LS low-power Schottky TTL logic family, supplied in a 14-pin DIP package. Available for RFQ through Pacific Component Xchange.

The XD74LS20 from Xinluda is a dual 4-input positive NAND gate built on the proven 74LS (Low-Power Schottky TTL) logic family. The device contains two electrically independent gates, each performing the logic NAND function on four inputs, where the output Y goes LOW only when all four inputs (A, B, C, D) are HIGH (Y = NOT(A·B·C·D)). The “XD” prefix denotes Xinluda’s through-hole DIP-14 package option, making it a convenient drop-in equivalent for the industry-standard 74LS20 / 7420 used across countless legacy and current digital designs.

Combining low power consumption, good noise immunity, and fast switching, the XD74LS20 is well suited to combinational logic, address decoding, and signal-gating tasks in 5 V TTL systems.

Key Features

• Two independent 4-input positive NAND gates (Y = NOT(A·B·C·D))
• 74LS Low-Power Schottky TTL technology with bipolar inputs
• Supply voltage range: 4.75 V to 5.25 V (nominal 5 V)
• Typical propagation delay approximately 10 ns (15 ns max)
• HIGH-level input voltage (V_IH) 2 V min; LOW-level input voltage (V_IL) 0.8 V max
• Output drive: I_OH −0.4 mA, I_OL 8 mA
• Low supply current: I_CCH 0.8 mA / I_CCL 2.2 mA (max)
• Operating free-air temperature range: 0 °C to +70 °C
• 14-lead plastic dual-in-line (DIP-14) through-hole package

Applications

• Combinational logic and Boolean function implementation
• Address and instruction decoding in legacy microprocessor systems
• Signal gating, enable/strobe logic, and interlock circuits
• Industrial controllers and 5 V TTL board-level glue logic
• Education, prototyping, and breadboard digital experiments
• Repair and maintenance of legacy 7400-series equipment

Why Source XD74LS20 from Pacific Component Xchange

The XD74LS20 is a specialty Xinluda part with little to no authorized-distributor stock, which can stall production and field-service work that depends on it. Pacific Component Xchange is an independent distributor specializing in hard-to-find and obsolete logic, power-management ICs, and optocouplers. We source scarce and end-of-life devices like the XD74LS20 through a vetted global supply network, apply authenticity and incoming-inspection controls to protect you from counterfeit risk, and ship worldwide to keep your line running.

This is a Request-For-Quote item. Contact Pacific Component Xchange for an RFQ with your target quantity and date code requirements, and our team will respond with current availability, lead time, and pricing.