ATF20V8B-15PI

Overview

The ATF20V8B-15PI is an industrial-grade, high-performance CMOS electrically erasable programmable logic device (EEPLD) manufactured by Microchip Technology. It utilizes advanced Flash memory technology to provide reprogrammability with a maximum pin-to-pin propagation delay of 15 ns. The device features eight macrocells, each allocated eight product terms, supporting registered, complex, and simple modes of operation. It operates within the -40°C to +85°C temperature range at a nominal 5V supply voltage.

Feature Summary

• Industry-standard architecture emulating many 24-pin PALs for direct replacement
• Eight configurable macrocells with flexible registered, combinatorial, or I/O configurations
• Internal input and I/O pull-up resistors ensuring known logic states
• Advanced Flash technology allowing 100 erase/write cycles and 20-year data retention

Applications

• Direct replacement for obsolete 20R8 family and most 24-pin combinatorial PLDs
• State machine initialization requiring power-up reset functionality
• Complex logic functions in industrial environments (-40°C to +85°C)
• Systems requiring reprogrammable logic with low-cost software tools

Procurement Notes

Verify that the specific ordering suffix 'I' confirms the Industrial temperature range (-40°C to +85°C) and the 'P' indicates the 24-lead PDIP package. Confirm RoHS compliance status as standard packages may vary from Green Package options. Ensure programming hardware supports the specified EEPLD architecture and security fuse settings.

Selection Notes

Select this component when replacing legacy 24-pin PAL devices such as the 20R8 series. Choose the ATF20V8B-15PI over lower speed grades if a 15 ns maximum delay is sufficient for the application timing requirements. Consider the BQ or BQL variants if significantly lower standby current (35 mA or 5 mA respectively) is required compared to the standard 50 mA standby current.

Part Context

This part belongs to the ATF20V8B family of Electrically Erasable Programmable Logic Devices. The family includes variants with different speed grades (-7, -10, -15, -25 ns) and power options (Standard, Q, QL). The ATF20V8B-15PI specifically denotes the 15 ns speed grade in the Industrial temperature range housed in a Plastic Dual Inline Package.

Replacement Considerations

ATF20V8B-15PC

FAQ

What are the three modes of operation for the ATF20V8B?

The device supports Registered Mode (for state machines), Complex Mode (combinatorial outputs with OE control), and Simple Mode (purely combinatorial outputs without OE control).

How does the power-up reset feature function?

Registers reset to the low state during power-up, causing registered outputs to be high. This ensures deterministic initialization for state machines, provided the VCC rise is monotonic and clock stability is maintained.

Is the ATF20V8B-15PI RoHS compliant?

The datasheet lists Green Package Options (Pb/Halide-free/RoHS Compliant) separately, such as ATF20V8B-15JU. Standard parts like the -15PI should be verified against the manufacturer's current environmental declaration for RoHS status.