A Comprehensive Guide To TIBPAD18N8-6CN * Programmable Logic Device (PLD) IC Macrocells

* Programmable Logic Device (PLD) IC Macrocells

General Description

The TIBPAD18N8-6C is a very-high-speed Programmable Address Decoder featuring 6-ns maximum propagation delay, the

highest speed in the TTL programmable logic family. The TIBPAD18N8 uses the IMPACT-X™ process and proven

titanium-tungsten fuse technology to provide reliable, high-performance substitutes for conventional TTL logic.

The TIBPAD18N8-6C contains 10 dedicated inputs and 8 product terms, each followed by an inverting buffer. Each of the eight

buffers can be individually programmed so that the corresponding pin can function either as an input or output, depending on

the state of the fuse controlling the output buffer, as indicated by Table 1. This allows the device to be used for functions

requiring up to 17 inputs and a single output or down to 10 inputs and 8 outputs.

A high-speed feedback path, which does not go through the output buffer, is provided to offer higher performance operation

in designs where feedback is required. The architectural fuse on the internal multiplexer is used for the selection of this path

(see Table 2). This makes the TIBPAD18N8-6C ideal for the implementation of a very fast NAND-NAND logic. The TIBPAD18N8

is supplied with all eight output buffers disabled thus establishing all programmable input/output lines as inputs. If an I/O line is

selected to be an output it must be programmed accordingly.

The TIBPAD18N8-6C is characterized for operation from 0℃ to 75℃.

Features

• Very-High-Speed Address Decoder (Ideal for Use with High Speed Processors}

• I/O Propagation Delay:6 ns Max

• Suitable for High Speed NAND-NAND Logic Implementation

• Field Programmable on Standard PLD Programmers

• Fully TTL Compatible

• Security Fuse Prevents Unauthorized Duplication

• Dependable Texas Instruments Quality and Reliability

• Potential Applications

      Address Decoders

      Random Logic(NAND-NAND)

      Code Detectors

      Peripheral Selectors

      Fault Monitors

      Machine State Decoders

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