ATF16V8C-7JU

Overview

The ATF16V8C-7JU is an electrically-erasable programmable logic device (EE PLD) manufactured by Microchip Technology, utilizing Atmel's EECMOS Flash memory technology. It features a maximum pin-to-pin propagation delay of 7.5 ns and operates within an industrial temperature range of -40°C to +85°C. The device provides eight macrocells with dedicated product terms, supporting registered, complex, or simple modes. It includes a pin-controlled power-down mode reducing supply current to under 100μA and incorporates I/O pin-keeper circuits for stable logic levels.

Feature Summary

• High-speed EE PLD with 7.5 ns maximum propagation delay
• Industrial temperature range (-40°C to +85°C)
• Pin-controlled power-down mode (<100μA current consumption)
• I/O pin-keeper circuits eliminate need for external pull-ups

Applications

• Direct replacement for industry-standard 20-pin PAL devices
• Complex digital logic implementation in industrial systems
• Low-power embedded control applications requiring reprogrammability

Procurement Notes

Verify the component originates from authorized Microchip or Atmel distribution channels due to its legacy status. Confirm RoHS compliance as the datasheet indicates green package options are available. Ensure programming equipment supports the specific JEDEC fuse file format required for the ATF16V8C architecture.

Selection Notes

Select this part when an industrial temperature rating is required alongside high-speed performance. The 7.5 ns speed grade offers a balance between timing constraints and power efficiency. Consider the power-down feature if system standby current reduction is critical, noting that Pin 4 must be configured accordingly in the design software.

Part Context

This component belongs to the ATF16V8C family of high-performance EECMOS programmable logic devices. It serves as a superset of the generic 16R8 architecture, allowing direct replacement of many older 20-pin PALs while offering enhanced reprogrammability through Flash memory technology compared to traditional fuse-based PLDs.

Replacement Considerations

ATF16V8C-7JC

FAQ

How does the ATF16V8C-7JU handle floating inputs?

The device includes internal input and I/O pin-keeper circuits that hold pins at their previous logic value when not driven externally, preventing indeterminate states without requiring DC current.

What is the function of Pin 4 on the ATF16V8C-7JU?

Pin 4 can be configured as a power-down control input. When high, it reduces supply current to less than 100μA; if power-down is not used, it functions as a standard logic input.

Can the ATF16V8C-7JU emulate other PAL devices?

Yes, it emulates many 20-pin PALs including 16R8, 16L8, 16H8, 16P8, and various combinatorial variants depending on the compiler mode selected during programming.