ATF20V8B-15PC

Overview

The ATF20V8B-15PC is a high-performance electrically-erasable programmable logic device (PLD) utilizing CMOS Flash memory technology. It features 24 pins in a Plastic Dual Inline Package (PDIP), providing 18 inputs and 8 bi-directional I/Os with 8 macrocells. The maximum pin-to-pin propagation delay is 15 ns, supporting an external feedback frequency of up to 45 MHz. Operating at a nominal 5V supply, it draws 60 mA standby current and 90 mA active current. The device supports registered, complex, and simple modes for PAL emulation.

Feature Summary

• High-speed Electrically-Erasable Flash PLD with 15 ns max propagation delay
• 24-pin PDIP package with 18 inputs and 8 I/O lines
• Supports Registered, Complex, and Simple operating modes
• Emulates 20R8, 20L8, 14L8, and other 24-pin PAL architectures

Applications

• Direct replacement for obsolete 24-pin PAL devices
• State machine implementation using registered outputs
• Combinatorial logic functions with output enable control
• System interface buffering and protocol conversion

Procurement Notes

Verify the ordering suffix 'PC' corresponds to the 24-lead Plastic Dual Inline Package (PDIP). Confirm the temperature range matches the application requirements, as standard commercial parts operate from 0°C to 70°C while industrial variants are designated with an 'I' suffix. Ensure programming equipment supports the specific Flash architecture and voltage levels defined in the datasheet.

Selection Notes

Select this component when a 15 ns speed grade is sufficient for the target clock frequency. The device offers three architectural modes; ensure the design compiler is configured correctly to utilize registered or combinatorial outputs as needed. Power consumption varies significantly between modes and switching activity; verify that the 90 mA active current draw fits within the system's power budget.

Part Context

This part belongs to the ATF20V8B family of high-performance EE PLDs. It serves as a drop-in replacement for legacy GAL and PAL devices, specifically emulating the 20R8 family. The Flash technology allows for reprogramming without UV erasure, offering higher reliability and lower power options compared to earlier EPROM-based PLDs.

Replacement Considerations

Public confirmed substitute part numbers: ATF20V8B-15PI (Industrial Temp), ATF20V8B-15PU (Green/Lead-free Industrial).

FAQ

What packaging does the ATF20V8B-15PC use?

The 'PC' suffix indicates a 24-lead, 0.300-inch wide Plastic Dual Inline Package (PDIP).

Can this device emulate 20R8 PALs?

Yes, in Registered Mode, the ATF20V8B can be programmed to emulate 20R8, 20RP8, 20R6, and similar registered PAL devices.

What is the maximum external feedback frequency?

The maximum external feedback frequency is 45 MHz.