National Semiconductor DM74ALS32N Quad OR Gate PDIP NOS

Advanced Low-Power Schottky TTL Quad 2-Input OR Gate 5V Logic

Condition

Unused, New Old Stock (NOS). Visual inspection completed with no issues noted. 14-pin PDIP through-hole package. Date code P9552SB indicating manufacture in the 52nd week of 1995. Recovered through our network of surplus and legacy suppliers.

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Product Overview

National Semiconductor DM74ALS32N is a Quad 2-Input OR Gate from the 74ALS Advanced Low-Power Schottky TTL family. Each IC contains four independent OR gates, providing standard 5V logic-level operation for digital control and interface circuits. The ALS series was designed to deliver faster switching speeds and lower power consumption than earlier 74LS logic while maintaining TTL compatibility.

Housed in a 14-pin PDIP package, the DM74ALS32N is suited for through-hole boards found in industrial controllers, legacy computing hardware, and educational lab equipment. The National Semiconductor “wavy N” logo is often sought for maintaining brand consistency in period-correct repairs.

Key Features

• Four independent 2-input OR gates
• Advanced Low-Power Schottky (74ALS) TTL family
• Supply voltage range: 4.5V to 5.5V
• Typical propagation delay: 14ns
• Low-level output current (IOL): 8mA
• Standard TTL logic-level compatibility
• Commercial temperature range: 0°C to 70°C
• 14-pin PDIP through-hole package
• Date code P9552SB (1995 production)

Applications

• Industrial PLC and control logic boards
• Legacy computer motherboard repair
• Signal routing and logic combining circuits
• Digital timing and gating stages
• Educational digital electronics labs
• Retro computing and hardware restoration
• Custom 5V TTL prototyping projects

Frequently Asked Questions

Is this compatible with standard 74LS32 designs?

Yes. The 74ALS32 is pin-compatible with 74LS32 devices and operates on standard 5V TTL logic levels. The ALS family offers improved speed and reduced power consumption.

What supply voltage does it require?

It operates within a 4.5V to 5.5V range, centered around standard 5V logic systems.

Can this be used in modern 3.3V systems?

This is a 5V TTL device. Direct use with 3.3V systems requires proper level shifting or compatibility verification.

Has the chip been electrically tested?

Visual inspection completed with no issues noted. As unused stock, it has not been installed or electrically tested.

What makes the ALS series different from older TTL?

The Advanced Low-Power Schottky series provides faster switching performance and lower power dissipation compared to earlier 74LS logic families.

Four OR gates in one package, built during the height of 5V logic design. If you are keeping classic TTL hardware running or building clean, discrete logic the old-school way, this National part is ready for the socket.