Microchip Technology AT17F16-30TQC

Overview

AT17F16-30TQC from Microchip Technology (formerly Atmel) is a 16-Mbit in-system programmable serial configuration PROM designed to store and deliver FPGA bitstreams in Master Serial mode. It features 3.3V operation, 5V-tolerant I/O pins, 33 MHz serial download speed, 10,000 write cycles endurance, and operates across 0°C to +70°C commercial temperature range. It directly interfaces with Xilinx XC3000/XC4000/Spartan/Virtex, Altera FLEX/APEX, Lucent ORCA, and Atmel AT40K/AT94K FPGAs.

For engineers reviewing the AT17F16-30TQC datasheet, AT17F16-30TQC pinout, AT17F16-30TQC application, or AT17F16-30TQC equivalent, key selection criteria include cascading support via CEO/CE daisy-chain, page-selectable memory partitioning (PAGE_EN/PAGESEL[1:0]), ISP capability via SER_EN-controlled 2-wire bus, low-power standby current (<2 mA), and compatibility with SRAM-based FPGA configuration protocols.

Technical Context

The AT17F16-30TQC implements a serial flash-based configuration memory architecture with internal address counter, tri-state DATA output, and automatic power-on reset. Its control logic synchronizes with FPGA CCLK, responds to RESET/OE for counter reset and output enable/disable, and uses CE to gate data output and clock progression.

It supports two operational modes: FPGA configuration mode (SER_EN = High) and 2-wire ISP programming mode (SER_EN = Low). In configuration mode, it delivers sequential bitstream data aligned to CLK edges, with CEO asserting Low upon completion to enable cascaded devices. Page-select functionality partitions the 16-Mbit space into four 4-Mbit segments when PAGE_EN is asserted.

Key Specifications

Pinout & Package

AT17F16-30TQC is housed in a 44-lead Thin Quad Flat Package (TQFP), JEDEC MS-026 ACB compliant, with 0.8 mm lead pitch and 10 mm × 10 mm footprint. The package supports reflow soldering and provides mechanical and thermal performance suitable for high-density FPGA carrier boards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC18V02, AT17F16-30TQC offers 8× more storage, ISP, and 5V tolerance; versus AT17F08A-30TQC, it doubles density while retaining identical footprint and interface - making it optimal for large Virtex or high-pin-count Spartan designs requiring field update capability.

Availability

AT17F16-30TQC is available at Aetrix Electronics and suitable for FPGA configuration boot, multi-FPGA daisy chain, field-reconfigurable systems, multi-bitstream storage, and industrial control applications requiring stable component supply and long-term obsolescence management.

Supply support for AT17F16-30TQC 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

Microchip Technology acquired Atmel in 2016 and maintains full support for legacy Atmel configurator products. The company specializes in microcontrollers, analog, FPGA configuration, and secure authentication ICs.

The AT17F Series was developed by Atmel specifically for reliable, low-cost, serial FPGA configuration in commercial and industrial environments - emphasizing ease of integration, cascading scalability, and in-system programmability.

FAQ

What is the primary function of the AT17F16-30TQC in an FPGA-based system?

The AT17F16-30TQC serves as a serial configuration PROM that stores and delivers the FPGA bitstream during power-up or reconfiguration. It interfaces directly with SRAM-based FPGAs (e.g., Xilinx Spartan, Virtex, Altera APEX) in Master Serial mode, using CLK from the FPGA to synchronize data delivery on the DATA line. Its CEO output enables daisy-chaining, and its 16-Mbit capacity supports large, complex FPGA designs. The AT17F16-30TQC eliminates the need for external controllers during configuration.

Can the AT17F16-30TQC be programmed in-circuit without removing it from the PCB?

Yes, the AT17F16-30TQC supports in-system programming (ISP) via its 2-wire serial interface when the SER_EN pin is driven Low. This allows field updates using industry-standard programmers or Atmel's ATDH2225 ISP cable. The device generates internal programming voltages, requiring only the 3.3V VCC supply during ISP. No socket removal or rework is needed - a key advantage for deployed AT17F16-30TQC units in remote or inaccessible locations.

How does the page-select feature of the AT17F16-30TQC improve system flexibility?

The AT17F16-30TQC's PAGE_EN and PAGESEL[1:0] pins partition its 16-Mbit memory into four independent 4-Mbit pages. By setting PAGE_EN High and selecting PAGESEL values (00–11), users can store and retrieve distinct FPGA bitstreams - enabling dynamic reconfiguration for different operating modes, protocols, or hardware revisions. This eliminates the need for multiple PROMs or external logic, and the AT17F16-30TQC retains full compatibility with standard FPGA configuration sequences.

Is the AT17F16-30TQC compatible with both commercial and industrial temperature ranges?

The AT17F16-30TQC is specified for the commercial temperature range (0°C to +70°C), as indicated by the "C" suffix in its ordering code. For industrial operation (-40°C to +85°C), the correct variant is AT17F16-30TQI. Both share identical pinout, timing, and functionality, but only AT17F16-30TQI is characterized and guaranteed across the extended range. Using AT17F16-30TQC outside 0°C–70°C may result in undefined behavior or reduced reliability.

What packaging options are available for the AT17F16-30TQC, and which one is used here?

The AT17F16-30TQC is offered in three packages: 8-lead LAP, 20-lead PLCC, and 44-lead TQFP. The "TQC" suffix explicitly denotes the 44-lead TQFP (package code 44A), measuring 10 mm × 10 mm with 0.8 mm lead pitch. This package provides superior thermal dissipation and higher I/O count margin compared to LAP or PLCC, making it ideal for dense FPGA carrier boards where layout routing and thermal management are critical for AT17F16-30TQC integration.