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

Microchip Technology AT17F16A-30CU

Name: AT17F16A-30CU
Brand: Microchip Technology
SKU: AT17F16A-30CU
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AT17F16A-30CU

Manufacturer:: Microchip Technology

Category:: Configuration PROMs for FPGAs

Package:: 8-TDFN

Datasheet:: AT17F16A-30CU.pdf

Description:: IC FLASH CONFIG 16M 8LAP

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Product details

Overview

AT17F16A-30CU 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 delivers 3.3V output, supports 5.0V-tolerant I/O, enables four-page reconfiguration via PAGE_EN/PAGESEL, and operates across –40°C to +85°C industrial temperature range.

For engineers reviewing the AT17F16A-30CU datasheet, AT17F16A-30CU pinout, AT17F16A-30CU application, or AT17F16A-30CU equivalent, key selection considerations include cascading support via nCASC, ISP capability over 2-wire bus with SER_EN control, fast 33 MHz serial download, low-power standby (<3 mA), and compatibility with Altera FLEX/Stratix/Cyclone and Xilinx SRAM-based FPGAs.

Technical Context

The AT17F16A-30CU implements a dedicated serial flash architecture optimized for FPGA configuration sequencing: DCLK acts as bidirectional clock (input during ISP, output during config), DATA serves as open-collector bidirectional data line, and nCASC provides daisy-chain cascade signaling. Its internal logic includes page-select decoding (PAGESEL[1:0] with PAGE_EN), automatic power-on reset via READY, and tri-state control coordinated by RESET/OE and nCS.

It uses on-chip charge pumps for 3.3V-only programming - no external high-voltage supply required - and integrates internal pull-up resistors on DATA, DCLK, and SER_EN. The device supports both single-device quad-bitstream storage and multi-device cascaded memory expansion, with timing-critical AC parameters (e.g., TCAC = 30 ns, TCE = 60 ns) validated for reliable FPGA boot timing margins.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	16,777,216 × 1-bit (16 Mbit); sufficient for full configuration of mid-to-high-end SRAM FPGAs including Cyclone IV, Stratix II, and AT94K devices.
Supply Voltage	2.97 V to 3.63 V; compatible with standard 3.3V FPGA I/O rails and eliminates need for level-shifting circuitry.
Operating Temperature	–40°C to +85°C; qualified for industrial environments without derating or thermal management overhead.
Max Serial Clock Frequency	33 MHz during FPGA configuration; enables sub-100 ms bitstream load times for typical 1–8 Mbit designs.
Write Endurance	10,000 write cycles; supports field firmware updates and iterative design validation without premature wear-out.
Standby Current	<3 mA at 3.3V; reduces system-level quiescent power in powered-but-idle FPGA systems.
Page Partitioning	Four independent 4-Mbit pages (via PAGE_EN + PAGESEL[1:0]); enables runtime reconfiguration between hardware variants without external controller.

Pinout & Package

AT17F16A-30CU is packaged in an 8-pad Leadless Array Package (LAP), 6.00 mm × 6.00 mm × 1.04 mm body, 1.27 mm pitch, RoHS-compliant Sn finish. Pin 1 identifier is marked in top-left corner; package is pin-compatible with 8-lead SOIC footprints.

Pin/Terminal	Circuit Role	Design Meaning
DATA	Bi-directional open-collector data I/O	Drives FPGA DIN during configuration; accepts programming data during ISP; requires external pull-up for logic-high assertion.
DCLK	Bidirectional clock	Outputs clock to FPGA DCLK during config; inputs clock during 2-wire ISP; internally synchronized to avoid metastability.
RESET/OE	Combined reset and output enable	Active-low reset clears address/bit counters; active-high OE enables DATA driver only when nCS is low.
nCS	Chip select input (active low)	Enables counter and DATA driver when low and OE high; forces standby mode when high; ignored during 2-wire ISP.
nCASC	Cascade select output	Goes low when final bit is read; used to chain multiple AT17FxxxA devices without external logic or timing glue.
SER_EN	Serial enable input	High = FPGA configuration mode; Low = 2-wire ISP mode; internal pull-up ensures safe default to config mode.
PAGE_EN	Page enable input	High enables 4-page partitioning; low disables paging and maps full 16-Mbit space linearly (00000h–FFFFFh).
PAGESEL[1:0]	Page select inputs	Selects one of four 4-Mbit pages (00–11) when PAGE_EN = high; no effect otherwise.
VCC / GND	Power supply / ground	Requires 0.2 μF decoupling capacitor close to VCC pin; GND plane must be solid for noise immunity during high-speed serial transfer.

Key Features

Feature	Design Value
In-system programmability (ISP)	Enables field updates via 2-wire serial bus without removing device; eliminates need for socketed programming stations.
Quad-page bitstream storage	Single AT17F16A-30CU holds four independent FPGA configurations; enables hardware version switching via PAGESEL pins alone.
5.0V-tolerant I/O	Allows direct interface to legacy 5V FPGA control signals (e.g., nCS, RESET/OE) without level shifters or voltage dividers.
Cascadable nCASC output	Hardware-automated daisy-chain handoff between configurators; removes FPGA-side logic or microcontroller coordination for multi-device chains.
Emulation of AT24C EEPROM	Supports reuse of existing AT24C-based programming infrastructure and software drivers for initial development and test.

Applications

Industrial PLC Reconfiguration	FPGA-Based Test Equipment
Use Scenario: Field-deployed programmable logic controllers require hardware updates to adapt to new sensor interfaces or control algorithms without physical access. IC Role / Device Role / Timing Role: AT17F16A-30CU stores up to four validated FPGA bitstreams and selects among them via GPIO-controlled PAGESEL lines during cold reboot. Use Value: Enables zero-downtime hardware revisioning - operators switch configurations remotely via Modbus register writes, avoiding factory reprogramming or board swaps.	Use Scenario: Automated test systems use FPGA-accelerated signal generation and analysis, requiring rapid switching between stimulus/response profiles. IC Role / Device Role / Timing Role: AT17F16A-30CU delivers bitstreams directly to FPGA DCLK/DIN pins in Master Serial mode, with READY pin confirming power-up readiness before test initiation. Use Value: Reduces test setup time from seconds to sub-100 ms by eliminating host-CPU-initiated configuration loading; supports deterministic real-time test sequencing.
Multi-FPGA Communication Gateway	Defense-Grade Secure Boot
Use Scenario: Ruggedized communication gateways integrate multiple FPGAs for protocol bridging (e.g., Ethernet-to-MIL-STD-1553), each requiring independent configuration. IC Role / Device Role / Timing Role: AT17F16A-30CU devices are cascaded via nCASC→nCS connections to sequentially configure three SRAM FPGAs using a single DCLK source. Use Value: Eliminates need for separate clock buffers or FPGA-to-FPGA handshaking logic; guarantees synchronized, glitch-free startup across all devices.	Use Scenario: Secure embedded systems require authenticated, tamper-resistant FPGA configuration to prevent malicious bitstream injection. IC Role / Device Role / Timing Role: AT17F16A-30CU provides trusted, non-volatile storage for signed bitstreams; its low-power standby mode preserves integrity during long idle periods. Use Value: Serves as root-of-trust anchor - combined with external crypto controller, enables secure boot verification prior to releasing FPGA from reset.

Industrial PLC Reconfiguration

FPGA-Based Test Equipment

Use Scenario: Field-deployed programmable logic controllers require hardware updates to adapt to new sensor interfaces or control algorithms without physical access.

IC Role / Device Role / Timing Role: AT17F16A-30CU stores up to four validated FPGA bitstreams and selects among them via GPIO-controlled PAGESEL lines during cold reboot.

Use Value: Enables zero-downtime hardware revisioning - operators switch configurations remotely via Modbus register writes, avoiding factory reprogramming or board swaps.

Use Scenario: Automated test systems use FPGA-accelerated signal generation and analysis, requiring rapid switching between stimulus/response profiles.

IC Role / Device Role / Timing Role: AT17F16A-30CU delivers bitstreams directly to FPGA DCLK/DIN pins in Master Serial mode, with READY pin confirming power-up readiness before test initiation.

Use Value: Reduces test setup time from seconds to sub-100 ms by eliminating host-CPU-initiated configuration loading; supports deterministic real-time test sequencing.

Multi-FPGA Communication Gateway

Defense-Grade Secure Boot

Use Scenario: Ruggedized communication gateways integrate multiple FPGAs for protocol bridging (e.g., Ethernet-to-MIL-STD-1553), each requiring independent configuration.

IC Role / Device Role / Timing Role: AT17F16A-30CU devices are cascaded via nCASC→nCS connections to sequentially configure three SRAM FPGAs using a single DCLK source.

Use Value: Eliminates need for separate clock buffers or FPGA-to-FPGA handshaking logic; guarantees synchronized, glitch-free startup across all devices.

Use Scenario: Secure embedded systems require authenticated, tamper-resistant FPGA configuration to prevent malicious bitstream injection.

IC Role / Device Role / Timing Role: AT17F16A-30CU provides trusted, non-volatile storage for signed bitstreams; its low-power standby mode preserves integrity during long idle periods.

Use Value: Serves as root-of-trust anchor - combined with external crypto controller, enables secure boot verification prior to releasing FPGA from reset.

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 page-select or cascading nCASC; PLCC-20 only.	Limited to smaller FPGAs; requires external logic for multi-bitstream selection; incompatible with daisy-chain topology.	Choose only if footprint and density constraints strictly limit to 4 Mbit and no cascading is needed.
Microchip (Atmel) AT17F002A-30CU	2-Mbit density; identical 8-pad LAP package, pinout, and ISP interface; same PAGE_EN/PAGESEL architecture but smaller address space.	Supports only basic single-bitstream or dual-page use cases; insufficient for Stratix/Cyclone III+ or AT94K devices.	Select when cost sensitivity outweighs density needs and FPGA configuration size remains ≤2 Mbit.

Compared with XC18V04 and AT17F002A-30CU, the AT17F16A-30CU uniquely combines 16-Mbit capacity, 4-page reconfigurability, 5V-tolerant I/O, and hardware-cascadable nCASC - making it the only option supporting large, multi-FPGA, field-upgradable industrial systems without external glue logic.

Availability

AT17F16A-30CU is available at Aetrix Electronics and suitable for industrial automation, defense communications, and FPGA-based test equipment requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant green packaging.

Supply support for AT17F16A-30CU 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, including datasheets, programming tools, and long-term manufacturing commitments.

The AT17FxxxA family was designed specifically to simplify and harden FPGA configuration in resource-constrained, high-reliability systems - emphasizing deterministic timing, in-field update capability, and seamless integration with Altera and Xilinx SRAM-based architectures.

FAQ

What is the primary function of the AT17F16A-30CU in an FPGA-based system?

The AT17F16A-30CU serves as a dedicated serial configuration PROM that stores and delivers FPGA bitstreams during power-up or reconfiguration. It operates in Master Serial mode, driving the FPGA's DCLK and DIN lines directly. Its 16-Mbit capacity supports complex FPGAs like Altera Stratix or Cyclone series, and its PAGE_EN/PAGESEL feature allows runtime selection among four stored bitstreams - enabling flexible hardware adaptation without external controllers. The AT17F16A-30CU eliminates reliance on microprocessors or external configuration logic.

Does the AT17F16A-30CU support in-system programming (ISP), and how is it enabled?

Yes, the AT17F16A-30CU supports in-system programming via a 2-wire serial interface. ISP is activated by pulling the SER_EN pin low, which switches the device from FPGA configuration mode to programming mode. In this state, DCLK and DATA become standard 2-wire bus signals (clock and data), and A2 functions as chip select. Programming can be performed using the Atmel ATDH2225 ISP Cable, ATDH2200E system, or third-party programmers - all operating at the standard 3.3V supply without external high-voltage sources. The AT17F16A-30CU retains full functionality after ISP, including page selection and cascading.

Can the AT17F16A-30CU be used in a daisy-chain configuration with other configuration devices?

Yes, the AT17F16A-30CU supports hardware-automated daisy-chaining via its nCASC output. When the internal address counter reaches the end of its memory space (or selected page), nCASC goes low, signaling the next device in the chain (whose nCS is connected to this nCASC) to begin outputting its data. This eliminates the need for FPGA-side logic or external sequencers to coordinate multi-device configuration. The AT17F16A-30CU's nCASC timing is characterized (TOCK ≤55 ns), ensuring reliable handoff across industrial temperature ranges - a capability not found in generic serial EEPROMs or smaller-density alternatives like the AT17F002A-30CU.

What is the significance of the "-30CU" suffix in AT17F16A-30CU?

The "-30CU" suffix in AT17F16A-30CU specifies three critical attributes: "30" denotes the default speed grade (characterized for 33 MHz serial download), "C" indicates the 8-pad Leadless Array Package (LAP, type 8CN4), and "U" signifies green, lead-free, halogen-free Sn finish per RoHS compliance. This exact variant operates across the industrial temperature range (–40°C to +85°C) and is distinct from PLCC-packaged versions like AT17F16A-30JU. The AT17F16A-30CU's LAP footprint offers compact layout and thermal performance advantages over PLCC in space-constrained embedded systems.

How does the AT17F16A-30CU handle power-up and reset sequencing with the FPGA?

The AT17F16A-30CU uses its open-collector READY pin to signal FPGA reset completion: READY is driven low during internal power-on reset and released (tri-stated) once initialization is complete. This allows the FPGA to delay its configuration start until the AT17F16A-30CU is fully ready - preventing timing violations or corrupted bitstream reads. Additionally, the RESET/OE pin provides active-low synchronous reset of the AT17F16A-30CU's address and bit counters, enabling clean restarts. Both signals are electrically compatible with standard FPGA reset inputs and require only a 4.7 kΩ pull-up on READY for proper logic-level interpretation. The AT17F16A-30CU's behavior is fully defined in Master Serial mode per Altera and Xilinx FPGA requirements.

AT17F16A-30CU Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 8-TDFN

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Programmable Type:: FLASH

Memory Size:: 16Mb

Voltage - Supply:: 2.97V ~ 3.63V

Operating Temperature:: -40°C ~ 85°C

Mounting Type:: Surface Mount

Supplier Device Package:: 8-LAP (6x6)

AT17F16A-30CU FAQ

1.How can I place an order for AT17F16A-30CU through Aetrix?

Please submit a Request for Quotation (RFQ) for AT17F16A-30CU 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 AT17F16A-30CU reliable?

The price and inventory of AT17F16A-30CU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT17F16A-30CU is usually 5 days.

3.What payment methods are accepted for AT17F16A-30CU?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT17F16A-30CU transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AT17F16A-30CU?

AT17F16A-30CU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AT17F16A-30CU 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 AT17F16A-30CU?

For technical support, including AT17F16A-30CU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT17F16A-30CU requirements.

6.How does Aetrix verify that AT17F16A-30CU is sourced from the original manufacturer or authorized distributors?

All AT17F16A-30CU 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 AT17F16A-30CU meets industry standards.

7.What is the process for return or replacement of AT17F16A-30CU?

All AT17F16A-30CU units undergo pre-shipment inspection (PSI). If there is an issue with AT17F16A-30CU, 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 AT17F16A-30CU part is unused and in its original packaging.

Return procedure for AT17F16A-30CU:

1.Submit a request within 90 days.

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

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