AT17C512-10PI

Overview

The AT17C512-10PI is a 512-kilobit serial EEPROM designed for FPGA configuration. It operates at 5V with an industrial temperature range of -40°C to +85°C. The device uses a simple serial interface compatible with SRAM FPGAs and supports in-system programming via a 2-wire bus. It features a low-power CMOS process, programmable reset polarity, and a system-friendly READY pin. Available in 8-lead PDIP and 20-lead PLCC packages.

Feature Summary

• Designed specifically for storing configuration programs for Field Programmable Gate Arrays (FPGAs).
• Supports In-System Programming (ISP) via a 2-wire serial bus interface.
• Features a system-friendly READY pin that indicates power-up completion and reliable operation.
• Allows user-programmable reset polarity to match specific FPGA requirements.

Applications

• Configuration memory for Xilinx XC3000, XC4000, and Spartan FPGAs.
• Configuration memory for Altera FLEX and APEX devices.
• Configuration memory for Atmel AT40K and AT94K devices.
• Daisy-chained configurations for higher-density FPGA arrays.

Procurement Notes

Verify the component manufacturer origin, as the AT17 series was originally developed by Atmel before its acquisition by Microchip Technology. Confirm package integrity for the 8-lead PDIP or 20-lead PLCC variants. Ensure the ordering code suffix matches the required commercial or industrial temperature specifications. Check for RoHS compliance status relative to production date.

Selection Notes

Select the AT17C512-10PI when a 5V supply voltage is required for the configuration memory. Choose this part over the LV variant if the target FPGA logic levels and power rails are strictly 5V. Consider the PDIP or PLCC package based on board space and assembly method constraints. Verify compatibility with the specific FPGA master serial mode timing requirements.

Part Context

This component belongs to the AT17 Series of FPGA Configuration EEPROMs, which also includes the 1-Mbit AT17C010 and the low-voltage AT17LV512/010 variants. These configurators provide a cost-effective solution for programming SRAM-based FPGAs without requiring parallel interface complexity. The series is known for its compatibility with various major FPGA families from the late 1990s and early 2000s.

Replacement Considerations

• AT17C512-10PC
• AT17C512-10JC

FAQ

How does the READY pin function during power-up?

The READY pin is driven Low during the power-on reset cycle and released (tri-stated) when the power-up is complete, signaling to the FPGA that the configuration data is stable.

Can the reset polarity be changed after manufacturing?

Yes, the user can program four EEPROM bytes to select the reset polarity as either active High or active Low to match the FPGA's requirements.

What is the purpose of the CEO pin in cascaded systems?

The CEO pin goes Low when the address counter reaches its maximum value, enabling the Chip Enable (CE) input of the next configurator in a daisy-chain sequence.