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Microchip Technology AT17LV040-10TQC
- Part No.:
- AT17LV040-10TQC
- Manufacturer:
- Microchip Technology
- Category:
- Configuration PROMs for FPGAs
- Package:
- 44-TQFP
- Datasheet:
-
AT17LV040-10TQC.pdf
- Description:
- IC CONFIG SEEPROM 4M 3.3V 44TQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT17LV040-10TQC from Microchip Technology (formerly Atmel) is a 4-Mbit serial EEPROM FPGA configuration memory designed for reliable, in-system programmable storage of bitstreams in SRAM-based FPGAs. It supports dual-voltage operation (3.3V ±10% and 5.0V ±5%/±10%), features cascading CEO output for multi-device daisy chains, and delivers 90-year data retention at 85°C (industrial grade). It is used in Xilinx Virtex™, Spartan®, and Altera® APEX™/FLEX® systems requiring robust, low-power configuration.
For engineers reviewing the AT17LV040-10TQC datasheet, AT17LV040-10TQC pinout, AT17LV040-10TQC application, or AT17LV040-10TQC equivalent, key selection criteria include its 4-Mbit density, TQFP-44 industrial-grade packaging, cascading capability via CEO, programmable reset polarity, and compatibility with master serial FPGA boot modes - all critical for high-reliability embedded reconfiguration systems.
Technical Context
The AT17LV040-10TQC implements a synchronous serial interface driven by FPGA CCLK, with CE, RESET/OE, and SER_EN controlling address counter enablement, reset behavior, and ISP mode entry. Its internal architecture includes a programmable 4-byte reset polarity register and write-protection logic tied to WP1/WP2 inputs during programming (SER_EN = Low).
It supports both standard FPGA master serial loading (SER_EN = High) and two-wire ISP programming (SER_EN = Low), with CEO output enabling automatic handoff between cascaded devices. The READY pin provides open-collector power-on reset status indication, and the device enters sub-150 µA standby current when CE is high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4,194,304 × 1-bit (4 Mbit) - sufficient for large Virtex or high-pin-count APEX FPGA configurations |
| Supply Voltage | 3.3V ±10% or 5.0V ±5% (commercial), ±10% (industrial) - enables drop-in use across legacy 5V and modern 3.3V FPGA platforms |
| Operating Temperature | -40°C to +85°C - qualified for industrial environments without derating |
| Data Retention | 90 years at 85°C - ensures long-term configuration integrity in unattended systems |
| Write Endurance | 100,000 cycles - supports field firmware updates and reconfiguration during development and maintenance |
| Max Clock Frequency | 15 MHz at 3.3V (industrial) - enables fast configuration load times compatible with FPGA CCLK timing budgets |
| Standby Current | 150 µA (industrial, 3.3V) - minimizes system power during FPGA idle states |
Pinout & Package
AT17LV040-10TQC is housed in a 44-lead Thin Quad Flat Package (TQFP), measuring 10 mm × 10 mm × 1.0 mm with 0.8 mm lead pitch and RoHS-compliant green construction. This package provides thermal resistance θJA = 62°C/W and θJC = 17°C/W, supporting conduction-cooled industrial PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–3, 5–10, 12–18, 20–22, 24–27, 29–32, 34–37, 39–43 | NC (No Connect) | Unbonded pins - must be left floating or grounded per layout best practices; no internal function |
| 4, 11, 19, 23, 28, 33, 38, 44 | GND / VCC | Power and ground distribution - eight dedicated pins ensure low-impedance supply routing and noise immunity |
| DATA (Pin 40) | Bi-directional I/O | Open-collector output during read; bidirectional during ISP programming - interfaces directly to FPGA DIN |
| CLK (Pin 43) | Input | Synchronizes internal address/bit counter - driven by FPGA CCLK; timing-critical path for configuration speed |
| RESET/OE (Pin 13) | Input | Programmable active-Low reset / active-High output enable - controls DATA driver state and counter reset |
| CE (Pin 21) | Input | Chip Enable (active Low) - enables read operations and disables counters when high, entering ultra-low-power standby |
| CEO (Pin 27) | Output | Chip Enable Output (active Low) - signals end-of-data to next cascaded AT17LV device; essential for multi-EEPROM chains |
| SER_EN (Pin 41) | Input | Serial Enable - must be tied to VCC for FPGA boot; pulled low to enter two-wire ISP programming mode |
| READY (Pin 29) | Output | Open-collector reset status indicator - driven low during power-on reset, released after initialization completes |
Key Features
| Feature | Design Value |
|---|---|
| In-System Programmability (ISP) | Enables field reprogramming via two-wire bus without removing the device - critical for post-deployment FPGA bitstream updates |
| Cascadable CEO Output | Allows daisy-chaining multiple AT17LV devices to support FPGAs requiring >4 Mbit configuration memory - eliminates need for external logic |
| Programmable Reset Polarity | User-configurable RESET/OE logic polarity via EEPROM bytes - ensures compatibility with diverse FPGA reset architectures (e.g., Xilinx vs. Altera) |
| Dual-Voltage Operation | Single part supports both 3.3V and 5.0V FPGA platforms - reduces BOM count and simplifies design reuse across product generations |
| Industrial Data Retention | 90-year data retention at 85°C - guarantees configuration persistence over full product lifecycle in harsh environments |
Applications
| High-Pin-Count FPGA Configuration | Multi-FPGA System Boot |
|---|---|
Use Scenario: Configuring Xilinx Virtex-II or Altera APEX-20K FPGAs with >2M gate counts requiring full bitstream storage. IC Role / Device Role / Timing Role: Primary serial configuration memory delivering bitstream on power-up via master serial mode. Use Value: Eliminates external microcontroller dependency; leverages FPGA's built-in CCLK generator for deterministic, self-contained boot. | Use Scenario: Booting a board with three Xilinx Spartan-3 FPGAs sharing a single configuration source chain. IC Role / Device Role / Timing Role: First device in daisy chain uses CEO to trigger CE of second device, enabling sequential auto-load. Use Value: Reduces PCB footprint and routing complexity versus discrete memory per FPGA; maintains synchronized startup timing. |
| Industrial PLC Reconfiguration | Field-Upgradeable Telecommunications Equipment |
Use Scenario: Storing updated logic images in programmable logic controllers deployed in factory automation systems. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed during cold start or watchdog-triggered reload. Use Value: 90-year data retention ensures firmware integrity across 15+ year deployments without battery backup. | Use Scenario: Enabling remote FPGA reconfiguration in base station radios via ISP over JTAG or auxiliary MCU interface. IC Role / Device Role / Timing Role: Two-wire ISP target allowing secure, in-field bitstream updates without hardware access. Use Value: 100,000 write cycles support frequent firmware patches; SER_EN-controlled mode isolation prevents accidental reprogramming. |
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 supply, no CEO output, no ISP capability | Designed exclusively for Xilinx FPGAs; requires external programmer; no cascading support | Select when using only Xilinx devices and ISP/cascading are unnecessary |
| Microchip AT17LV002-10TQC | 2-Mbit density, identical TQFP-44 package, same voltage/temp specs, same pinout except reduced memory array | Half the capacity - suitable for smaller Spartan-3 or early Virtex devices | Select when configuration size permits; allows direct PCB reuse with memory downsize |
Compared with XC18V04 and AT17LV002-10TQC, AT17LV040-10TQC uniquely combines 4-Mbit capacity, industrial-grade reliability, cascading CEO, and in-system programmability - making it the only choice for scalable, field-upgradeable, multi-FPGA industrial systems requiring long-term data integrity.
Availability
AT17LV040-10TQC is available at Aetrix Electronics and suitable for industrial control systems, telecommunications infrastructure, and aerospace avionics requiring stable component supply, long-lifecycle support, and RoHS-compliant green packaging.
Supply support for AT17LV040-10TQC 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
Microchip Technology is a global leader in microcontrollers, analog components, and nonvolatile memory solutions, acquired Atmel in 2016 and maintains full support for legacy Atmel FPGA configuration products.
The AT17LV series was engineered specifically for SRAM-based FPGA configuration - prioritizing deterministic timing, cascading scalability, and industrial environmental resilience over general-purpose EEPROM features.
FAQ
What is the maximum clock frequency supported by AT17LV040-10TQC during FPGA configuration?
The AT17LV040-10TQC supports up to 15 MHz at 3.3V under industrial conditions (−40°C to +85°C), as specified in AC Characteristics Table 17. This ensures compatibility with high-speed CCLK outputs from Xilinx Virtex and Altera APEX FPGAs while maintaining timing margin for signal integrity across PCB traces. The actual achievable frequency depends on load capacitance and trace length, but the device meets spec up to 15 MHz with 50 pF test load.
Does AT17LV040-10TQC support in-system programming (ISP), and what interface is required?
Yes, AT17LV040-10TQC supports in-system programming via a two-wire serial interface activated when SER_EN is pulled low. This mode uses CLK and DATA lines (with internal pull-downs on WP1/WP2 and A2) and requires no additional control pins. Programming occurs at the same VCC supply voltage (3.3V or 5V), eliminating need for external high-voltage sources - a key advantage over older parallel-programmed configuration PROMs.
How does the CEO pin function in a daisy-chained configuration using multiple AT17LV040-10TQC devices?
In a daisy chain, the CEO pin of the first AT17LV040-10TQC goes low upon completion of its last bit transfer, enabling the CE input of the second device. This handoff is fully autonomous and requires no FPGA intervention. All devices share the same CLK and DATA lines; only CEO-to-CE interconnect is needed between adjacent units. The AT17LV040-10TQC's CEO is electrically and functionally identical to that of other AT17LV family members, ensuring seamless interoperability in mixed-density chains.
Can AT17LV040-10TQC be used with both 3.3V and 5.0V FPGAs, and are level shifters required?
Yes, AT17LV040-10TQC operates natively at either 3.3V ±10% or 5.0V ±5% (commercial) / ±10% (industrial), and its I/O thresholds (VIH = 2.0V min, VIL = 0.8V max) are compatible with both 3.3V and 5V logic families. No level shifters are required when interfacing with Xilinx or Altera FPGAs - the device's output VOH (2.4V min at 3.3V, 3.6V min at 5V) and VOL (0.4V max) meet standard interface requirements across voltage domains.
What is the purpose of the READY pin on AT17LV040-10TQC, and how should it be used in system design?
READY is an open-collector output that is actively driven low during power-on reset and tri-stated once initialization completes (~100 ms typical). It provides hardware-synchronized status for FPGA or system controller reset sequencing. A 4.7 kΩ pull-up resistor is recommended. Unlike RESET/OE, READY is not user-programmable and serves solely as a power-good indicator - enabling safe release of FPGA global reset only after AT17LV040-10TQC is fully ready to respond to CCLK commands.
AT17LV040-10TQC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 44-TQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Programmable Type:
- Serial EEPROM
- Memory Size:
- 4Mb
- Voltage - Supply:
- 3V ~ 3.6V, 4.75V ~ 5.25V
- Operating Temperature:
- 0°C ~ 70°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-TQFP (10x10)
AT17LV040-10TQC FAQ
1.How can I place an order for AT17LV040-10TQC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT17LV040-10TQC 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 AT17LV040-10TQC reliable?
The price and inventory of AT17LV040-10TQC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT17LV040-10TQC is usually 5 days.
3.What payment methods are accepted for AT17LV040-10TQC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT17LV040-10TQC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT17LV040-10TQC?
AT17LV040-10TQC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT17LV040-10TQC 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 AT17LV040-10TQC?
For technical support, including AT17LV040-10TQC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT17LV040-10TQC requirements.
6.How does Aetrix verify that AT17LV040-10TQC is sourced from the original manufacturer or authorized distributors?
All AT17LV040-10TQC 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 AT17LV040-10TQC meets industry standards.
7.What is the process for return or replacement of AT17LV040-10TQC?
All AT17LV040-10TQC units undergo pre-shipment inspection (PSI). If there is an issue with AT17LV040-10TQC, 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 AT17LV040-10TQC part is unused and in its original packaging.
Return procedure for AT17LV040-10TQC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT17LV040-10TQC Tags
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