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Microchip Technology AT17LV256-10SI
- Part No.:
- AT17LV256-10SI
- Manufacturer:
- Microchip Technology
- Category:
- Configuration PROMs for FPGAs
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AT17LV256-10SI.pdf
- Description:
- IC SRL CONFG EEPROM 256K 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,872
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Product details
Overview
AT17LV256-10SI from Atmel is a 256-Kbit (32 K × 8) serial EEPROM FPGA configuration memory, supporting both 3.3V and 5.0V operation, programmable reset polarity, and in-system programming via two-wire bus. It interfaces directly with SRAM-based FPGAs including Xilinx XC4000, Spartan®, and Altera FLEX® in Master Serial mode for automatic power-up configuration.
For engineers reviewing the AT17LV256-10SI datasheet, AT17LV256-10SI pinout, AT17LV256-10SI application, or AT17LV256-10SI equivalent, key selection criteria include industrial temperature range (–40°C to +85°C), cascading support via CEO output, low-power standby current (<100 µA at 3.3V), EEPROM endurance (100,000 write cycles), and compatibility with industry-standard programmers such as Atmel ATDH2225 ISP Cable.
Technical Context
The AT17LV256-10SI implements a serial-access configuration memory architecture optimized for FPGA boot loading, using a synchronous clock-driven address counter and tri-state DATA output controlled by CE and RESET/OE. Its SER_EN pin enables dual-mode operation: High for FPGA master serial loading, Low for two-wire ISP programming.
It supports cascaded daisy-chain configurations via CEO output-asserted Low when internal address counter reaches maximum-to enable subsequent EEPROMs in multi-FPGA systems. The device features programmable reset polarity and write protection (WP input active during programming only), with no external controller required for FPGA-initiated configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 256 Kbit (32,768 × 8-bit organization), sufficient to configure mid-density SRAM FPGAs like Xilinx XC4010 or Altera EPF10K10. |
| Supply voltage | 3.3V ±10% or 5.0V ±5% (commercial) / ±10% (industrial); dual-voltage support simplifies migration across legacy and modern FPGA platforms. |
| Operating temperature | –40°C to +85°C (industrial grade), validated for use in embedded control, industrial automation, and telecom infrastructure. |
| Standby current | <100 µA at 3.3V (industrial), enabling low-power system sleep modes without compromising configuration retention. |
| Endurance | 100,000 write cycles, ensuring reliable field reprogramming over product lifetime in applications requiring firmware updates or FPGA bitstream revisions. |
| Data retention | 90 years at 85°C (industrial), guaranteeing nonvolatile storage integrity across extended deployment lifecycles without refresh. |
| Max clock frequency | 10 MHz (3.3V, industrial), compatible with standard FPGA CCLK timing budgets for deterministic configuration load times. |
Pinout & Package
AT17LV256-10SI is supplied in a 20-lead SOIC package (20S2), 0.300" wide, with 1.27 mm pitch, RoHS-compliant and green (Pb/halide-free). Pinout applies specifically to AT17LV65/128/256 family members per Figure 2-5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DATA | I/O (open-collector bi-directional) | Serial data path for configuration bitstream output to FPGA DIN; also used for two-wire ISP programming when SER_EN = Low. |
| CLK | Input | Synchronizes internal address/bit counter; driven by FPGA CCLK during master serial configuration. |
| RESET/OE | Input | Programmable polarity pin: active-Low RESET resets address counter; active-High OE enables DATA output driver (with CE = Low). |
| CE | Input (active Low) | Enables address counting and DATA output when Low; forces low-power standby when High (ICCS <100 µA). |
| GND | Power reference | Ground return; requires 0.2 µF decoupling capacitor between VCC and GND per datasheet recommendation. |
| CEO | Output (active Low) | Chains multiple EEPROMs: goes Low when last bit is read, enabling CE of next device in daisy chain. |
| SER_EN | Input | High = normal FPGA configuration mode; Low = enters two-wire ISP programming mode (requires external programmer). |
| VCC | Power supply | Accepts 3.3V or 5V; internal regulation ensures stable core operation across voltage variants. |
Key Features
| Feature | Design Value |
|---|---|
| In-system programmability (ISP) | Two-wire serial interface (SER_EN-controlled) enables field updates without socket removal or dedicated programming hardware beyond standard ISP cable. |
| Cascadable CEO output | Enables daisy-chained configuration of multiple FPGAs or high-density arrays without external logic; eliminates need for multiplexers or glue logic. |
| Programmable reset polarity | User-configurable RESET/OE logic polarity via EEPROM byte programming, matching diverse FPGA reset architectures (e.g., Xilinx active-Low vs. Altera active-High). |
| Low-power standby mode | ICCS <100 µA at 3.3V/85°C allows integration into battery-backed or energy-sensitive systems without compromising configuration persistence. |
| Emulation of AT24CXXX EEPROMs | Enables reuse of existing I²C-compatible firmware and bootloader infrastructure for configuration management in mixed-protocol systems. |
Applications
| Industrial PLC Configuration | Xilinx Spartan® FPGA Boot |
|---|---|
Use Scenario: Reconfiguring FPGA-based motion control logic in factory-floor programmable logic controllers after firmware updates. IC Role / Device Role / Timing Role: Stores and delivers full bitstream to Xilinx Spartan-3 FPGA on power-up via Master Serial mode, synchronized to CCLK. Use Value: Enables zero-downtime field upgrades: AT17LV256-10SI's 100,000 write cycles and 90-year data retention ensure long-term reliability across maintenance cycles. | Use Scenario: Initializing Xilinx Spartan-3 FPGA in telecom line card for protocol adaptation (e.g., T1/E1 framing). IC Role / Device Role / Timing Role: Acts as dedicated configuration memory, interfacing directly with FPGA CCLK and DIN pins; CEO supports optional expansion for dual-FPGA redundancy. Use Value: Eliminates need for external microcontroller: AT17LV256-10SI's self-timed serial readout and automatic address increment reduce BOM count and PCB area. |
| Altera FLEX® 10K System Boot | Multi-FPGA Industrial Vision System |
Use Scenario: Loading configuration for Altera FLEX10K20 FPGA in automated optical inspection equipment. IC Role / Device Role / Timing Role: Provides 256-Kbit storage for logic + I/O pin mapping; RESET/OE polarity programmed to match FLEX®'s active-High OE requirement. Use Value: Dual-voltage support (3.3V/5V) allows direct integration into legacy 5V backplanes or modern 3.3V designs without level-shifting. | Use Scenario: Coordinating configuration of three Xilinx XC4013 FPGAs in real-time machine vision preprocessing pipeline. IC Role / Device Role / Timing Role: First AT17LV256-10SI drives primary FPGA and asserts CEO to enable second device; third device triggered by second CEO, forming linear daisy chain. Use Value: CEO propagation delay (≤60 ns at 3.3V) ensures deterministic inter-device handoff, avoiding configuration race conditions in time-critical imaging systems. |
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 XC18V02 | 2-Mbit capacity, 3.3V-only supply, no CEO output, no ISP capability, requires Xilinx-specific programming tools. | Targeted exclusively for Xilinx FPGAs; lacks cross-vendor compatibility and field reprogrammability. | Select when using only Xilinx Virtex®/Spartan® families and requiring higher density without cascading. |
| Microchip 25LC256 | 256-Kbit SPI EEPROM, 2.5–5.5V supply, no CEO, no FPGA-specific timing control, no programmable reset polarity. | General-purpose serial EEPROM; requires FPGA-side logic to manage address sequencing and end-of-data signaling. | Choose for cost-sensitive non-FPGA applications or where custom configuration state machines are already implemented. |
Compared with XC18V02 and 25LC256, AT17LV256-10SI uniquely combines industrial temperature rating, cascading CEO, ISP capability, and dual-voltage operation-making it optimal for multi-vendor FPGA deployments requiring field-upgradable, low-power, and daisy-chainable configuration memory.
Availability
AT17LV256-10SI is available at Aetrix Electronics and suitable for industrial automation, telecom infrastructure, and embedded FPGA development requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for AT17LV256-10SI 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 AT17LV series was designed explicitly for reliable, low-maintenance FPGA configuration in industrial and telecom environments-emphasizing robustness, ease of integration, and long-term data retention without refresh.
FAQ
What is the operating temperature range for the AT17LV256-10SI?
The AT17LV256-10SI is rated for industrial operation from –40°C to +85°C. This range is validated per datasheet Section 11 (Absolute Maximum Ratings) and Section 12 (Operating Conditions), making it suitable for deployment in harsh environments such as factory floors, outdoor telecom cabinets, and transportation control systems where ambient thermal stress is significant. The AT17LV256-10SI maintains full functionality-including 100,000 write cycles and 90-year data retention-at the upper limit of this range.
Does the AT17LV256-10SI support in-system programming (ISP)?
Yes, the AT17LV256-10SI supports in-system programming via its two-wire serial interface when SER_EN is driven Low. This mode allows field reprogramming using industry-standard tools like the Atmel ATDH2225 ISP Cable, without removing the device from the PCB. Programming occurs at the same VCC supply voltage (3.3V or 5V), with internal charge pumps generating required programming voltages-no external high-voltage source is needed. The AT17LV256-10SI retains full ISP capability across its entire industrial temperature range.
How does the CEO pin function in daisy-chain configurations with the AT17LV256-10SI?
The CEO (Chip Enable Output) pin on the AT17LV256-10SI goes Low when its internal address counter reaches the final memory location, signaling completion of its configuration bitstream. In a daisy chain, this CEO output connects directly to the CE input of the next AT17LV256-10SI (or compatible device), enabling its DATA output to begin streaming. Propagation delay is ≤60 ns (3.3V, industrial), ensuring deterministic handoff. The AT17LV256-10SI's CEO is not present on AT17LV65 and is fully functional only in AT17LV65/128/256 variants per datasheet Figure 2-5 and Section 4.9.
Can the AT17LV256-10SI be used with both 3.3V and 5V FPGA systems?
Yes, the AT17LV256-10SI supports dual-voltage operation: 3.3V ±10% and 5.0V ±5% (commercial) or ±10% (industrial). Its I/O thresholds (VIH ≥2.0V, VIL ≤0.8V) and output drive strength (VOH ≥2.4V at 3.3V, ≥3.6V at 5V) ensure interoperability with both 3.3V and 5V FPGA families-including Xilinx XC4000, Spartan®, and Altera FLEX®-without level shifters. DC characteristics in Sections 13–14 and AC timing in Sections 17–20 are explicitly specified for both voltage domains.
What is the endurance and data retention specification for the AT17LV256-10SI?
The AT17LV256-10SI guarantees 100,000 write/erase cycles and 90 years of data retention at 85°C (industrial grade), as stated in Section 1 (Features) and validated in reliability testing per Atmel's quality standards. These figures apply to the full 256-Kbit array under specified operating conditions (VCC = 3.3V or 5V, temperature ≤85°C). Retention degrades predictably with temperature-e.g., 190 years at 70°C-enabling long-term deployment in unattended infrastructure without periodic refresh.
AT17LV256-10SI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Programmable Type:
- Serial EEPROM
- Memory Size:
- 256Kb
- Voltage - Supply:
- 3V ~ 3.6V, 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
AT17LV256-10SI FAQ
1.How can I place an order for AT17LV256-10SI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT17LV256-10SI 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 AT17LV256-10SI reliable?
The price and inventory of AT17LV256-10SI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT17LV256-10SI is usually 5 days.
3.What payment methods are accepted for AT17LV256-10SI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT17LV256-10SI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT17LV256-10SI?
AT17LV256-10SI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT17LV256-10SI 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 AT17LV256-10SI?
For technical support, including AT17LV256-10SI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT17LV256-10SI requirements.
6.How does Aetrix verify that AT17LV256-10SI is sourced from the original manufacturer or authorized distributors?
All AT17LV256-10SI 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 AT17LV256-10SI meets industry standards.
7.What is the process for return or replacement of AT17LV256-10SI?
All AT17LV256-10SI units undergo pre-shipment inspection (PSI). If there is an issue with AT17LV256-10SI, 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 AT17LV256-10SI part is unused and in its original packaging.
Return procedure for AT17LV256-10SI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT17LV256-10SI Tags
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AT17LV512A-10PU
Microchip Technology
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EPCQ4ASI8N
Intel
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AT17LV256-10PU
Microchip Technology
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AT17LV256-10NU
Microchip Technology
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EPCQ16ASI8N
Intel
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AT17LV010-10PU
Microchip Technology
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EPCQ32ASI8N
Intel
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EPCQ64ASI16N
Intel
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EPCQ128ASI16N
Intel
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AT17LV512A-10JU
Microchip Technology
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AT17LV512-10JU
Microchip Technology
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AT17LV010-10JU
Microchip Technology
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