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PAL14L4NC from PAL

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PAL14L4NC

Manufacturer: PAL, NS

Progammable Array Logic Series 24 (PAL Series 24)

Partnumber Manufacturer Quantity Availability
PAL14L4NC PAL, NS 480 In Stock

Description and Introduction

Progammable Array Logic Series 24 (PAL Series 24) **Introduction to the PAL14L4NC Programmable Logic Device**  

The PAL14L4NC is a programmable array logic (PAL) device manufactured by National Semiconductor (NS). Designed for digital logic applications, it provides a flexible and efficient solution for implementing custom combinational and sequential logic circuits.  

This device features a fixed OR array and a programmable AND array, allowing users to define specific logic functions by configuring the fusible links. With 14 inputs and 4 outputs, the PAL14L4NC is well-suited for medium-complexity logic designs, offering a balance between performance and ease of use. Its outputs are active-low, making it compatible with systems requiring inverted logic signals.  

The PAL14L4NC operates on standard TTL voltage levels and is housed in a durable plastic dual in-line package (PDIP), ensuring reliable performance in industrial and commercial applications. Its non-volatile memory retains the programmed logic even when power is removed, eliminating the need for external configuration storage.  

Common applications include address decoding, state machine control, and interface logic in embedded systems. While newer CPLDs and FPGAs have largely replaced PAL devices in modern designs, the PAL14L4NC remains a cost-effective choice for legacy systems and straightforward logic implementations.  

For engineers working with older digital systems, understanding and utilizing the PAL14L4NC can be essential for maintenance and upgrades.

Application Scenarios & Design Considerations

Progammable Array Logic Series 24 (PAL Series 24)

Alternative Part Number

  • GAL16V8D-15LPN --: Generic array logic device that is commonly used as a functional replacement for PAL14L4-type parts, with low-power CMOS process and 15 ns speed.
  • ATF16V8B-15PU --: EEPROM-based SPLD in a 20-pin DIP that can emulate PAL14L4 logic functions and is widely available as a drop-in upgrade.
  • TIBPAL16L8-15CN --: Classic PAL16L8-series programmable logic device with similar 20-pin pinout and combinatorial outputs, suitable for replacing PAL14L4 designs.
  • GAL16V8D-15LPN --: Generic array logic device that can emulate the PAL14L4's 14-input, 4-output combinational logic function; widely available and low cost.
  • ATF16V8B-15PU --: EEPROM-based SPLD with 16 inputs and 8 outputs, can be programmed to replace the PAL14L4NC's logic; supports low-power operation and is actively produced.
  • TIBPAL16L8-15CN --: Classic PAL16L8 device with 16 inputs and 8 outputs, compatible with PAL14L4 logic designs and available from a major manufacturer.

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