ATF20V8BQL-15PU

Overview

The ATF20V8BQL-15PU is a high-performance Electrically Erasable Programmable Logic Device (EEPLD) manufactured by Microchip Technology. It utilizes advanced Flash technology for reprogrammability and features 8 macrocells with 24 pins in a Plastic Dual Inline Package (PDIP). The device operates at a maximum propagation delay of 15 ns and supports a maximum frequency of 45 MHz. It functions within an industrial temperature range of -40°C to +85°C, powered by a 5V supply. Standby current is typically 5 mA, while active current reaches 40 mA.

Feature Summary

• Industry-standard architecture emulating many 24-pin PALs
• Advanced Flash technology allowing 100 erase/write cycles
• CMOS and TTL compatible inputs and outputs
• Internal input and I/O pull-up resistors

Applications

• Direct replacement for 20R8 family PLDs
• Replacement for most 24-pin combinatorial PLDs
• State machine initialization requiring power-up reset

Procurement Notes

Verify the package type corresponds to the 'PU' suffix, indicating a 24-lead PDIP. Confirm the 'QL' designation ensures low-power operation suitable for systems requiring reduced standby and active current consumption compared to standard variants.

Selection Notes

Select this variant when industrial temperature stability (-40°C to +85°C) is required alongside low power dissipation. The 15 ns speed grade offers a balance between performance and power efficiency. Ensure the design accommodates the specific pinout for registered, complex, or simple modes as needed.

Part Context

This component belongs to the ATF20V8B family, which includes standard, low-power (Q), and ultra-low-power (QL) versions. The ATF20V8BQL specifically targets applications where power conservation is critical without sacrificing the flexibility of programmable logic architectures.

Replacement Considerations

ATF20V8BQL-15PC

FAQ

What are the three operational modes of the ATF20V8BQL?

The device supports Registered Mode, Complex Mode, and Simple Mode, allowing it to emulate various 24-pin PAL devices depending on the configuration of registers and output enables.

How does the power-up reset feature function?

Registers reset to the low state during power-up, ensuring the registered output state is high. This requires a monotonic VCC rise and stable clock conditions during the reset period.

What is the purpose of the User Signature Word?

It provides 64 bits of programmable memory accessible even if the security fuse is programmed, allowing storage of project-specific data such as part numbers or revisions.