AT17LV256A-10JI

Configuration PROMs For FPGAs Overview

The AT17LV256A-10JI is a 256-Kbit (32K x 8) serial EEPROM designed for FPGA configuration. It operates at a maximum clock frequency of 10 MHz and supports supply voltages of 3.0V to 3.6V or 4.5V to 5.5V. The device features in-system programmability via a 2-wire bus, low-power standby mode, and high endurance of 100,000 write cycles with 90-year data retention. It is housed in a 20-lead PLCC package and functions within an industrial temperature range of -40°C to +85°C.

Configuration PROMs For FPGAs Feature Summary

• Supports In-System Programming (ISP) using a simple 2-wire serial interface
• Provides direct compatibility with Altera FLEX, APEX, Xilinx, and Lucent ORCA SRAM-based FPGAs
• Features cascadable read-back capability to support multiple devices or higher-density arrays
• Includes programmable reset polarity and internal write-protection mechanisms

Configuration PROMs For FPGAs Applications

• Configuration memory for Altera FLEX and APEX Field Programmable Gate Arrays
• Configuration storage for Xilinx XC3000, XC4000, and Spartan series FPGAs
• Configuration memory for Lucent ORCA and Motorola MPA1000 FPGAs
• Emulation of Atmel AT24CXXX serial EEPROMs in legacy designs

Configuration PROMs For FPGAs Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and voltage tolerance. Ensure the industrial temperature grade (-40°C to +85°C) matches the application requirements. Confirm that the 20-lead PLCC footprint aligns with the target PCB design. Check for any recent revisions to the pinout or electrical characteristics before finalizing procurement.

Configuration PROMs For FPGAs Selection Notes

Select this component when a cost-effective, serial-access configuration memory is required for SRAM-based FPGAs. It is suitable for designs needing in-system programmability without external controllers. Consider the 256-Kbit density for smaller FPGA configurations or as part of a cascaded chain for larger arrays. Verify power supply constraints to ensure compatibility with either 3.3V or 5V system architectures.

Configuration PROMs For FPGAs Part Context

This device belongs to the AT17A series of FPGA configurators, which are specialized EEPROMs optimized for loading configuration programs into field-programmable gate arrays. The series offers various densities from 64-Kbit to 2-Mbit, sharing pin-compatible packages across the family. These devices simplify the configuration process by interfacing directly with FPGA control signals, eliminating the need for complex external programming hardware during normal operation.

Configuration PROMs For FPGAs Replacement Considerations

AT17LV256A-10JC

Configuration PROMs For FPGAs FAQ

How does the device handle cascading for larger FPGA configurations?

The device uses its nCASC output pin to signal the completion of data transfer. This pin connects to the nCS input of the next configurator in the chain, allowing subsequent devices to begin outputting data automatically.

Is the reset polarity configurable?

Yes, the user can program the polarity of the RESET/OE pin to be either active-high or active-low during the programming phase to match specific FPGA requirements.

What is the function of the SER_EN pin during normal operation?

During FPGA loading operations, the SER_EN pin must be held High. It is only driven Low to enter the 2-wire Serial Programming Mode for in-system programming.