ATF1504AS-7QC100

Overview

The ATF1504AS-7QC100 is a high-performance, electrically-erasable CPLD from the ATF1504AS family. It features 64 macrocells with up to 40 product terms each and supports 100 pins in a PQFP package. The device offers a maximum pin-to-pin delay of 7.5 ns and registered operation up to 125 MHz. It operates at 5V or 3.3V I/O levels within a commercial temperature range of 0°C to 70°C. Key capabilities include In-System Programmability (ISP) via JTAG, enhanced routing resources, and advanced power management features such as standby modes.

Feature Summary

• 64 Macrocells with expandable logic capacity up to 40 product terms per macrocell
• Maximum 7.5 ns pin-to-pin propagation delay and 125 MHz internal clock frequency
• In-System Programmability (ISP) using standard 4-pin JTAG interface
• Supports both 5.0V and 3.3V I/O voltage levels

Applications

• High-density logic integration replacing TTL, SSI, MSI, LSI, and classic PLDs
• PCI-compliant interface designs requiring high current drivers
• Complex state machine implementations with fast registered feedback
• Systems requiring field-upgradable logic via ISP

Procurement Notes

Verify the specific -7 speed grade and QC100 PQFP-100 package against the official Microchip datasheet before procurement. Confirm that the design utilizes the commercial temperature range specifications. Ensure programming hardware supports the IEEE 1149.1 JTAG protocol for ISP functionality.

Selection Notes

Select this component when a 7.5 ns delay is required for timing-critical applications. The 100-pin PQFP package provides 68 I/O pins and four dedicated inputs. Consider the -7 grade over slower variants if system speeds exceed 100 MHz. Verify power supply requirements align with the 5V or 3.3V I/O options available.

Part Context

This part belongs to the ATF1504AS series of electrically-erasable CPLDs. It shares architectural features with other speed grades like -10 and -15 but offers superior switching speed. The device is designed for applications needing reprogrammability and high logic density in a single chip.

Replacement Considerations

Direct replacements within the same family include ATF1504AS-10QC100 and ATF1504AS-15QC100, which offer slower speeds but may be more readily available. Cross-family replacements require verification of pin compatibility and logic resource adequacy.

FAQ

What is the maximum internal clock frequency for the ATF1504AS-7QC100?

The maximum internal global clock frequency is 125 MHz.

Can the JTAG pins be used as general I/O?

Yes, if JTAG boundary-scan testing or ISP is not needed, the four JTAG control pins can be configured as standard I/O pins.

How does the device handle unused input pins?

The ATF1504AS offers a programmable pin-keeper option that holds floating inputs at their previous state, preventing unnecessary power consumption and noise without external pull-up resistors.