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PAL16R4AJC from NS,National Semiconductor

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PAL16R4AJC

Manufacturer: NS

Progammable Array Logic Series 24 (PAL Series 24)

Partnumber Manufacturer Quantity Availability
PAL16R4AJC NS 803 In Stock

Description and Introduction

Progammable Array Logic Series 24 (PAL Series 24) The **PAL16R4AJC** from National Semiconductor (NS) is a programmable array logic (PAL) device designed for high-performance digital logic applications. As part of the PAL16R4 series, this component features a fixed OR-array architecture with programmable AND gates, offering flexibility in implementing complex combinational and sequential logic functions.  

With 16 inputs and 4 registered outputs, the PAL16R4AJC is well-suited for state machine designs, address decoding, and control logic in embedded systems. Its registered outputs include feedback paths, enabling efficient implementation of synchronous sequential circuits. The device operates at reliable speeds and is compatible with standard TTL logic levels, ensuring seamless integration into existing digital systems.  

Fabricated using proven bipolar technology, the PAL16R4AJC delivers robust performance with low propagation delays, making it ideal for timing-critical applications. Its one-time programmable (OTP) architecture ensures secure, non-volatile configuration, though it requires careful planning during development.  

Engineers have historically utilized this PAL device in industrial automation, telecommunications, and computing systems where custom logic solutions were needed before the widespread adoption of CPLDs and FPGAs. While newer technologies have since emerged, the PAL16R4AJC remains a reliable choice for legacy system maintenance and specific low-complexity designs.  

For optimal performance, designers should refer to the datasheet for detailed electrical characteristics and programming guidelines.

Application Scenarios & Design Considerations

Progammable Array Logic Series 24 (PAL Series 24)

Alternative Part Number

  • GAL16V8D-15LJ --: Generic array logic device that can emulate the PAL16R4A function; widely available and commonly used as a direct replacement in legacy designs.
  • ATF16V8B-15JC --: CMOS programmable logic device compatible with 16R4-type PAL architectures, offering similar speed and pinout for drop-in substitution.
  • TIBPAL16R4-15CN --: Pin-compatible PAL16R4 device from a different series and manufacturer, suitable as a functional replacement with comparable propagation delay.
  • GAL16V8D-15LJ --: Generic array logic device that can emulate the PAL16R4A function; widely available and commonly used as a direct replacement for obsolete PAL parts.
  • ATF16V8B-15JC --: CMOS PLD with similar 16V8 architecture and 20-pin PLCC package, suitable for replacing the PAL16R4AJC in existing designs.
  • TIBPAL16R4-15M --: Pin-compatible PAL16R4 device from TI with comparable speed and logic function, offering a drop-in style alternative.

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