ATF20V8BQL-15SI

Overview

The ATF20V8BQL-15SI is a high-performance, electrically-erasable programmable logic device (PLD) from Microchip Technology. It utilizes advanced Flash technology for reprogrammability and features eight configurable macrocells with dedicated product terms. The component operates at a maximum pin-to-pin delay of 15 ns and supports clock frequencies up to 62 MHz in no-feedback configurations. Designed for low-power applications, the 'QL' variant specifies a standby supply current of 5 mA and an active current of 20 mA. It provides CMOS and TTL compatible inputs and outputs, includes internal pull-up resistors, and offers robust ESD protection rated at 2,000 V.

Feature Summary

• High-speed Electrically-Erasable Flash PLD with 7.5 ns to 25 ns speed grades
• Eight Configurable Macrocells supporting Registered, Complex, and Simple modes
• Low Power Options: Standby current as low as 5 mA (QL series)
• CMOS and TTL Compatible I/O with Internal Pull-up Resistors
• Industrial Temperature Range (-40°C to +85°C) and 2,000V ESD Protection

Applications

• Direct replacement for 24-pin PAL devices such as 20R8, 20L8, and 20H8 families
• Complex glue logic implementation in digital systems
• State machine design utilizing registered output modes
• Address decoding and bus interface control

Procurement Notes

Verify package type against the ordering suffix; 'S' indicates SOIC and 'J' indicates PLCC. Confirm that the specific speed grade matches system timing requirements, noting that older -7 and -15 speed grades may have obsolete status dates. Ensure programming hardware supports the specific Flash memory architecture and security fuse settings required for the application.

Selection Notes

Select the QL suffix for applications requiring minimal power consumption, specifically those needing 5 mA standby current. Choose the Industrial temperature range ('I') for environments operating between -40°C and +85°C. Use the Registered mode if flip-flops are needed for state storage, or Complex/Simple modes for purely combinatorial logic. Verify compiler support for the desired emulation subset (e.g., 20R8 or 20L8).

Part Context

This component belongs to the ATF20V8B family of Electrically-Erasable Programmable Logic Devices. It serves as a versatile logic solution capable of emulating various standard PAL architectures. The family distinguishes itself through low-voltage operation options and high-reliability Flash technology, allowing for extensive reprogramming cycles while maintaining compatibility with legacy logic designs.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.