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Home > Products > Integrated Circuits (ICs) > Memory > Configuration PROMs for FPGAs

Microchip Technology AT17F040A-30QI

Name: AT17F040A-30QI
Brand: Microchip Technology
SKU: AT17F040A-30QI
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AT17F040A-30QI

Manufacturer:: Microchip Technology

Category:: Configuration PROMs for FPGAs

Package:: 32-TQFP

Datasheet:: AT17F040A-30QI.pdf

Description:: IC FLASH CONFIG 4M 32TQFP

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Product details

Overview

AT17F040A-30QI from Microchip Technology (formerly Atmel) is a 4-Mbit FPGA configuration PROM designed for serial master-mode loading of SRAM-based FPGAs including Altera FLEX®, Cyclone™, and Stratix® devices. It delivers 3.3V output capability, 5.0V-tolerant I/O pins, in-system programmability via 2-wire bus, and supports up to 33MHz serial download speed.

For engineers reviewing the AT17F040A-30QI datasheet, AT17F040A-30QI pinout, AT17F040A-30QI application, or AT17F040A-30QI equivalent, key selection criteria include cascading support via nCASC, page-selectable 4-bitstream storage, low-power standby current (<3mA), ISP programming compatibility with ATDH2225 cable, and dual-package availability (8-pad LAP / 20-lead PLCC).

Technical Context

The AT17F040A-30QI implements a serial flash memory architecture optimized for FPGA configuration sequencing, using DCLK as both input (during ISP) and output (during configuration), with DATA operating as open-collector bi-directional I/O. Its control logic integrates power-on reset, address counter management, and page-select decoding (PAGE_EN + PAGESEL[1:0]) for partitioned 0–3FFFFh address space.

It features dedicated cascade signaling (nCASC output tied to next device's nCS), READY open-collector reset indicator, and SER_EN-gated mode switching between FPGA configuration (SER_EN = High) and 2-wire ISP programming (SER_EN = Low). All DC/AC timing adheres to industrial-grade specs: VCC = 2.97–3.63V, T_A = –40°C to +85°C, t_CE = 60ns max, F_MAX = 10MHz during ISP.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Density	4,194,304 × 1-bit (4 Mbit); sufficient to store full configuration bitstream for mid-range SRAM FPGAs like Cyclone II or AT94KAL.
Supply Voltage	VCC = 2.97–3.63 V; compatible with standard 3.3V system rails and tolerant of ±10% variation.
I/O Voltage Tolerance	5.0V-tolerant inputs; enables direct interfacing with 5V logic without level shifters.
Serial Download Speed	Up to 33 MHz; reduces FPGA configuration time significantly versus slower PROMs.
Write Endurance	100,000 write cycles typical; supports repeated field reprogramming for development and maintenance.
Standby Current	<3 mA at 3.3V; minimizes system power draw when nCS is high and SER_EN is high.
Operating Temperature	–40°C to +85°C; qualified for industrial environments without derating.

Pinout & Package

AT17F040A-30QI is available in two RoHS-compliant packages: 8-pad Leadless Array Package (LAP, 6.00 × 6.00 × 1.04 mm, 1.27 mm pitch) and 20-lead Plastic J-Leaded Chip Carrier (PLCC, JEDEC MS-018 AA). The "QI" suffix denotes industrial-grade 20-lead PLCC (20J package).

Pin/Terminal	Circuit Role	Design Meaning
DATA	Bi-directional open-collector I/O	Drives FPGA DIN during configuration; used for bidirectional data transfer during 2-wire ISP programming.
DCLK	Configurable clock I/O	Input during ISP (SER_EN = Low); output during FPGA configuration (SER_EN = High) to drive FPGA DCLK.
RESET/OE	Combined active-low reset / active-high output enable	Resets internal address/bit counters when low; enables DATA driver when high and nCS low.
nCS	Active-low chip select	Enables address counting and DATA output when low; forces standby mode when high (SER_EN = High).
nCASC	Cascade select output	Goes low when internal counter reaches max address; used to daisy-chain multiple AT17FxxxA devices.
SER_EN	Serial enable input	Must be high for FPGA configuration; pulled high internally; driven low to enter 2-wire ISP mode.
PAGE_EN, PAGESEL[1:0]	Page selection controls	Enable 4-page partitioning (00000h–3FFFFh) for storing and selecting among four independent FPGA bitstreams.
READY	Open-collector reset status indicator	Driven low during power-up reset; released (high-Z) upon completion-used for FPGA synchronization.

Key Features

Feature	Design Value
Single-device multi-bitstream storage	Stores four independent FPGA configuration files (pages), enabling runtime reconfiguration without external controller.
Cascadable architecture	nCASC output directly drives nCS of next device, supporting seamless expansion beyond 4 Mbit without glue logic.
In-system programmability (ISP)	2-wire serial interface (A2 + DATA) allows field updates using ATDH2225 cable or third-party programmers-no socket removal required.
SRAM-FPGA interface simplicity	Direct pin-to-pin connection to FPGA master serial mode signals (DIN, DCLK, nCONFIG/nSTATUS), eliminating protocol translation.
Low-power standby operation	Consumes <3 mA when nCS is high and SER_EN is high-critical for battery-backed or energy-sensitive systems.

Applications

Industrial PLC Configuration	FPGA-Based Test Equipment
Use Scenario: Reconfiguring FPGA logic in programmable logic controllers deployed in factory automation lines where firmware updates must occur without hardware replacement. IC Role / Device Role / Timing Role: Configuration PROM providing master-serial bitstream loading at power-up or on command; synchronized via READY and RESET/OE to ensure deterministic startup. Use Value: Enables field-upgradable control logic with zero PCB changes-four pages allow A/B firmware versions and fallback configurations.	Use Scenario: Supporting multiple instrument modes (e.g., digital pattern generator, logic analyzer, protocol decoder) within a single FPGA-based benchtop tester. IC Role / Device Role / Timing Role: Nonvolatile storage and selective delivery of distinct configuration bitstreams; PAGESEL[1:0] selects mode-specific logic at runtime. Use Value: Eliminates need for external microcontroller or EEPROM manager-reduces BOM count and boot latency by >200ms vs. SPI flash solutions.
Avionics Data Acquisition Unit	Medical Imaging FPGA Subsystem
Use Scenario: Configuring radiation-tolerant FPGAs in airborne data acquisition units requiring verified, repeatable startup behavior across thermal cycles. IC Role / Device Role / Timing Role: Industrial-grade (–40°C to +85°C) configuration memory with power-on READY signal ensuring FPGA waits until PROM initialization completes. Use Value: Guarantees deterministic configuration sequence under voltage ramp and temperature stress-meets DO-254 design assurance Level C requirements.	Use Scenario: Loading real-time image processing pipelines (e.g., CT reconstruction kernels) into medical-grade FPGA subsystems certified to IEC 62304. IC Role / Device Role / Timing Role: Secure, standalone configuration source with no host processor dependency; cascading support accommodates large bitstreams exceeding 4 Mbit. Use Value: Reduces time-to-image by enabling parallel configuration of multi-FPGA architectures-nCASC chaining avoids external arbitration logic.

Industrial PLC Configuration

FPGA-Based Test Equipment

Use Scenario: Reconfiguring FPGA logic in programmable logic controllers deployed in factory automation lines where firmware updates must occur without hardware replacement.

IC Role / Device Role / Timing Role: Configuration PROM providing master-serial bitstream loading at power-up or on command; synchronized via READY and RESET/OE to ensure deterministic startup.

Use Value: Enables field-upgradable control logic with zero PCB changes-four pages allow A/B firmware versions and fallback configurations.

Use Scenario: Supporting multiple instrument modes (e.g., digital pattern generator, logic analyzer, protocol decoder) within a single FPGA-based benchtop tester.

IC Role / Device Role / Timing Role: Nonvolatile storage and selective delivery of distinct configuration bitstreams; PAGESEL[1:0] selects mode-specific logic at runtime.

Use Value: Eliminates need for external microcontroller or EEPROM manager-reduces BOM count and boot latency by >200ms vs. SPI flash solutions.

Avionics Data Acquisition Unit

Medical Imaging FPGA Subsystem

Use Scenario: Configuring radiation-tolerant FPGAs in airborne data acquisition units requiring verified, repeatable startup behavior across thermal cycles.

IC Role / Device Role / Timing Role: Industrial-grade (–40°C to +85°C) configuration memory with power-on READY signal ensuring FPGA waits until PROM initialization completes.

Use Value: Guarantees deterministic configuration sequence under voltage ramp and temperature stress-meets DO-254 design assurance Level C requirements.

Use Scenario: Loading real-time image processing pipelines (e.g., CT reconstruction kernels) into medical-grade FPGA subsystems certified to IEC 62304.

IC Role / Device Role / Timing Role: Secure, standalone configuration source with no host processor dependency; cascading support accommodates large bitstreams exceeding 4 Mbit.

Use Value: Reduces time-to-image by enabling parallel configuration of multi-FPGA architectures-nCASC chaining avoids external arbitration logic.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Xilinx XC18V04	4-Mbit density, 3.3V-only I/O (not 5V-tolerant), no built-in page-select logic, requires external pull-ups on all I/Os.	Limited to Xilinx FPGA ecosystems; lacks PAGE_EN/PAGESEL for multi-bitstream management.	Select when targeting Spartan-II/III families exclusively and board layout already uses 3.3V-only I/O routing.
Microchip (Atmel) AT17F040A-30CU	Same die, identical electrical specs, but packaged in 8-pad LAP instead of 20-lead PLCC; smaller footprint, no through-hole option.	Better suited for space-constrained PCBs; not pin-compatible with AT17F040A-30QI due to different package and pinout.	Choose for new designs prioritizing miniaturization and surface-mount assembly-requires separate layout revision.

Compared with XC18V04 and AT17F040A-30CU, the AT17F040A-30QI uniquely combines 5V-tolerant I/O, integrated 4-page bitstream management, and industrial PLCC packaging-making it optimal for legacy-compatible, field-upgradeable, multi-FPGA industrial systems.

Availability

AT17F040A-30QI is available at Aetrix Electronics and suitable for industrial control systems, FPGA-based test instrumentation, avionics data acquisition, and medical imaging subsystems requiring stable component supply across extended product lifecycles.

Supply support for AT17F040A-30QI 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 FPGA configuration products. The company specializes in microcontrollers, analog, FPGA, and memory solutions for industrial, automotive, and communications markets.

The AT17FxxxA series was developed specifically to simplify and harden FPGA configuration in industrial and embedded systems-emphasizing reliability, in-system programmability, and seamless integration with major FPGA vendors' master-serial protocols.

FAQ

What is the primary function of the AT17F040A-30QI in an FPGA-based system?

The AT17F040A-30QI serves as a dedicated serial configuration PROM that loads bitstream data into SRAM-based FPGAs during power-up or on command. It operates in master-serial mode, driving the FPGA's DIN and DCLK lines directly. Its 4-Mbit capacity stores full configuration images for devices such as Altera Cyclone or Atmel AT94KAL FPGAs, and its READY pin ensures synchronous startup. The AT17F040A-30QI eliminates need for external controllers by handling address counting, page selection, and cascade signaling autonomously.

Does the AT17F040A-30QI support in-system programming (ISP), and what interface is required?

Yes, the AT17F040A-30QI supports in-system programming via a 2-wire serial interface activated by pulling SER_EN low. Programming uses the A2 pin as address select and DATA as bidirectional data line-no additional control signals needed. It is compatible with the Atmel ATDH2225 ISP cable and industry-standard third-party programmers. The AT17F040A-30QI performs internal charge-pumping to generate programming voltages, requiring only a 3.3V supply during ISP. This enables field updates without removing the device from the PCB.

How does the page-select feature of the AT17F040A-30QI work, and what is its practical benefit?

The AT17F040A-30QI implements page-select logic using PAGE_EN and PAGESEL[1:0] inputs to partition its 0–3FFFFh address space into four 256-KB pages. When PAGE_EN is high, each PAGESEL combination selects one page (e.g., PAGESEL=00 → 00000h–0FFFFh). This allows a single AT17F040A-30QI to store and deliver four independent FPGA bitstreams-enabling runtime reconfiguration, A/B firmware swapping, or multi-mode operation. The feature eliminates need for external multiplexing or multiple PROMs, reducing system complexity and cost.

Can the AT17F040A-30QI be used with Xilinx FPGAs, and what compatibility considerations apply?

The AT17F040A-30QI is explicitly documented as compatible with Xilinx FPGAs requiring serial configuration, including AT40K and AT94K devices. While not branded for Xilinx like the XC18Vxx family, its timing, signaling (DCLK, DATA, nCS, RESET/OE), and master-serial protocol align with Xilinx's 3.3V serial PROM interface specifications. However, users must verify pin mapping and AC timing margins (e.g., t_CE, t_AC) against the target FPGA's configuration controller spec. The AT17F040A-30QI does not emulate Xilinx's proprietary configuration packet format-it delivers raw bitstream data, which Xilinx FPGAs accept in master-serial mode.

What is the significance of the "QI" suffix in AT17F040A-30QI, and how does it affect mechanical and thermal design?

The "QI" suffix in AT17F040A-30QI indicates a 20-lead Plastic J-Leaded Chip Carrier (PLCC) package qualified for industrial temperature range (–40°C to +85°C). Per Atmel's ordering code, "Q" maps to PLCC (20J), and "I" denotes industrial grade. This package has 1.27 mm lead pitch, JEDEC MS-018 AA compliance, and 0.102 mm max lead coplanarity. Its through-hole-compatible footprint supports robust mechanical mounting and higher thermal mass than LAP variants-advantageous in high-vibration or thermally cycling environments. Designers must observe the 260°C soldering limit and use recommended 0.2 μF VCC–GND decoupling.

AT17F040A-30QI Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 32-TQFP

Packaging:: Tray

Product Status:: Obsolete

Programmable:: Not Verified

Programmable Type:: FLASH

Memory Size:: 4Mb

Voltage - Supply:: 2.97V ~ 3.63V

Operating Temperature:: -40°C ~ 85°C

Mounting Type:: Surface Mount

Supplier Device Package:: 32-TQFP (7x7)

AT17F040A-30QI FAQ

1.How can I place an order for AT17F040A-30QI through Aetrix?

Please submit a Request for Quotation (RFQ) for AT17F040A-30QI on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AT17F040A-30QI reliable?

The price and inventory of AT17F040A-30QI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT17F040A-30QI is usually 5 days.

3.What payment methods are accepted for AT17F040A-30QI?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT17F040A-30QI transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AT17F040A-30QI?

AT17F040A-30QI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AT17F040A-30QI order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AT17F040A-30QI?

For technical support, including AT17F040A-30QI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT17F040A-30QI requirements.

6.How does Aetrix verify that AT17F040A-30QI is sourced from the original manufacturer or authorized distributors?

All AT17F040A-30QI products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT17F040A-30QI meets industry standards.

7.What is the process for return or replacement of AT17F040A-30QI?

All AT17F040A-30QI units undergo pre-shipment inspection (PSI). If there is an issue with AT17F040A-30QI, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AT17F040A-30QI part is unused and in its original packaging.

Return procedure for AT17F040A-30QI:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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