Microchip 1-Mb FPGA configuration EEPROM with Altera Pinout provides easy-to-use, cost-effective configuration memory for FPGAs. It comes in 8-lead LAP and 20-lead PLCC packages. This EEPROM can configure one or more FPGA devices through a simple serial-access procedure.

EE Programmable Serial Memories Designed to Store Configuration Programs for
Altera® FLEX® and APEX™ Field Programmable Gate Arrays (FPGA)
Supports both 3.3V and 5.0V Operating Voltage Applications
In-System Programmable (ISP) via 2-wire Bus
Simple Interface to SRAM FPGAs
Compatible with the Atmel
AT6000, AT40K and AT94K Devices, Altera FLEX,
APEX Devices, ORCA® FPGAs, Xilinx® XC3000, XC4000, XC5200, Spartan®,
Virtex™ FPGAs, Motorola MPA1000 FPGAs
Cascadable Read-back to Support Additional Configurations or Higher-density Arrays
Very Low-power CMOS EEPROM Process
Programmable Reset Polarity
8-lead PDIP and 20-lead PLCC Packages (Pin-compatible Across Product Family)
Emulation of the Atmel AT24C Serial EEPROMs