Microchip Technology AT17LV002-10TQC

Overview

AT17LV002-10TQC from Atmel is a 2-Mbit (2,097,152 × 1-bit) serial EEPROM FPGA configuration memory designed for in-system programming of SRAM-based FPGAs via 2-wire bus. It operates at 3.3V ±10%, supports programmable reset polarity, and features a system-friendly READY pin for power-up sequencing. Used in Xilinx Virtex™, Spartan®, XC4000™, Altera APEX™, and Lucent ORCA® FPGA systems.

For engineers reviewing the AT17LV002-10TQC datasheet, AT17LV002-10TQC pinout, AT17LV002-10TQC application, or AT17LV002-10TQC equivalent, key selection criteria include 3.3V operation, TQFP-44 package compatibility, cascading CEO support, standby current ≤200 µA, and FPGA master serial mode timing compliance up to 15 MHz (non-cascaded).

Technical Context

The AT17LV002-10TQC implements a serial-access EEPROM architecture with an internal address counter, bit counter, and programmable reset/OE logic. Its SER_EN-controlled 2-wire ISP mode enables field reprogramming without removing the device from the board.

It interfaces directly with FPGA control signals: CLK drives the internal counter, CE enables data output and address increment, RESET/OE resets the counter and tri-states DATA, and CEO provides daisy-chain enable signaling. The READY pin delivers open-collector power-on reset status indication.

Key Specifications

Pinout & Package

AT17LV002-10TQC is housed in a 44-lead Thin Quad Flat Package (TQFP-44, JEDEC MS-026 ACB), measuring 10 mm × 10 mm × 1.0 mm with 0.8 mm lead pitch and 0.45–0.75 mm lead length. Pin 1 is marked by a corner chamfer.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FPGA configuration memory applications.

Compared with AT17LV002-10JC and AT17LV002-10CC, the AT17LV002-10TQC offers the full feature set - including READY, CEO, and WP1 - in the industry-standard 44-lead TQFP, making it optimal for new industrial and telecom designs requiring robust power sequencing and multi-device cascading.

Availability

AT17LV002-10TQC is available at Aetrix Electronics and suitable for industrial motor control, telecom infrastructure, FPGA development platforms, and multi-FPGA systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AT17LV002-10TQC includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Atmel Corporation (now part of Microchip Technology) is a semiconductor manufacturer specializing in microcontrollers, nonvolatile memory, and FPGA configuration solutions.

The AT17LV002-10TQC belongs to Atmel's high-density AT17 Series FPGA Configuration EEPROM family, engineered specifically to replace one-time-programmable PROMs in SRAM FPGA systems with reprogrammable, low-voltage, industrial-grade serial memory.

FAQ

What is the primary function of the AT17LV002-10TQC in an FPGA system?

The AT17LV002-10TQC serves as a serial configuration memory that stores and delivers the bitstream to initialize SRAM-based FPGAs such as Xilinx Spartan® and Virtex™ devices during power-up. It operates in Master Serial Mode, using CLK, DATA, CE, and RESET/OE signals to synchronize with the FPGA's configuration controller. The AT17LV002-10TQC eliminates the need for external microcontrollers by enabling direct, self-contained FPGA boot.

Does the AT17LV002-10TQC support in-system programming (ISP), and how is it enabled?

Yes, the AT17LV002-10TQC supports in-system programming via a 2-wire serial interface. ISP is activated by pulling the SER_EN pin Low while applying VCC (3.3V); this places the device into programming mode, allowing reconfiguration without removal from the PCB. Standard industry programmers and Atmel's ATDH2225 ISP Cable are compatible. The AT17LV002-10TQC retains full functionality in normal operation when SER_EN is tied to VCC.

What is the role of the READY pin on the AT17LV002-10TQC, and how should it be used?

The READY pin on the AT17LV002-10TQC is an open-collector output that is driven Low during power-on reset and released (tri-stated) once VCC stabilizes within specification. It provides a hardware handshake to delay FPGA configuration until supply rails are valid. A 4.7 kΩ pull-up resistor to VCC is required. This signal is especially critical in systems where premature FPGA startup could cause latch-up or metastability - the AT17LV002-10TQC uses READY to coordinate safe initialization.

Can multiple AT17LV002-10TQC devices be cascaded, and what pin enables this?

Yes, AT17LV002-10TQC devices can be cascaded to support larger FPGA bitstreams or multi-FPGA configurations. Cascading is enabled by the CEO (Chip Enable Output) pin, which goes Low when the internal address counter reaches its maximum value. In a daisy chain, CEO of the first device connects to CE of the second, automatically enabling the next device upon completion of the prior bitstream. This behavior is intrinsic to the AT17LV002-10TQC's architecture and requires no external logic.

Is the AT17LV002-10TQC pin-compatible with older 5V AT17C002 devices?

No, the AT17LV002-10TQC is not pin-compatible with the 5V AT17C002 despite sharing the same 44-lead TQFP package outline. While both use the 44A footprint, the AT17LV002-10TQC repurposes several pins (e.g., WP1, SER_EN, READY) that are NC or absent on AT17C002. Additionally, AT17LV002-10TQC operates at 3.3V and has different DC/AC timing - direct substitution requires schematic and layout review. The AT17LV002-10TQC replaces AT17C002 only in new 3.3V designs.