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Microchip Technology AT17LV256A-10JI
- Part No.:
- AT17LV256A-10JI
- Manufacturer:
- Microchip Technology
- Category:
- Configuration PROMs for FPGAs
- Package:
- 20-LCC (J-Lead)
- Datasheet:
-
AT17LV256A-10JI.pdf
- Description:
- IC SRL CONFG EEPROM 256K 20-PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,998
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Product details
Overview
AT17LV256A-10JI from Atmel is a 256-Kbit FPGA configuration EEPROM designed to store bitstream programs for Altera FLEX® and APEX™ FPGAs in industrial temperature environments (–40°C to +85°C), operating at 3.3V ±10% or 5.0V ±10%, with 100,000 write cycles endurance and 90-year data retention at 85°C. It supports in-system programming via 2-wire serial interface and cascading for multi-device configurations.
For engineers reviewing the AT17LV256A-10JI datasheet, AT17LV256A-10JI pinout, AT17LV256A-10JI application, or AT17LV256A-10JI equivalent, this device serves as a drop-in replacement for Altera EPC1213 in industrial-grade FPGA configuration systems requiring reliable nonvolatile serial memory with programmable reset polarity and low-power standby mode (≤100 µA).
Technical Context
The AT17LV256A-10JI implements a serial-access configuration memory architecture synchronized to DCLK rising edges, with address counter control governed by RESET/OE and nCS logic states. Its internal oscillator enables autonomous clocking during FPGA master serial loading when SER_EN = High.
It features dual-voltage operation (3.3V/5V), programmable reset polarity stored in EEPROM, and hardware write protection via WP pin - active only during programming (SER_EN = Low). The device supports daisy-chain cascading via nCASC/nCS handshaking and tri-states DATA upon completion or reset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 256 Kbit (262,144 × 1-bit) - matches Altera EPC1213 density for full FPGA configuration storage |
| Supply voltage | 3.3V ±10% or 5.0V ±10% - supports industrial rail tolerances without external regulation |
| Operating temperature | –40°C to +85°C - qualified for industrial embedded FPGA systems without derating |
| Write endurance | 100,000 cycles - sufficient for repeated firmware updates and field reconfiguration |
| Data retention | 90 years at 85°C - ensures long-term reliability in unattended industrial deployments |
| Standby current | ≤100 µA at 3.3V - enables ultra-low-power hold state during FPGA sleep or idle modes |
| Max clock frequency | 10 MHz (industrial, 3.3V) - compatible with standard FPGA DCLK timing budgets |
Pinout & Package
AT17LV256A-10JI is supplied in a 20-lead Plastic Leaded Chip Carrier (PLCC) package, measuring 9.78 mm × 9.78 mm × 3.05 mm (max height), with J-leads and JEDEC MS-018 compliance. Thermal resistance θJA = 90°C/W enables operation without heatsinking in typical PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (nCS) | Chip Select input | Active-Low enable for address counter and DATA output; determines master/slave role in cascade chains |
| 2 (GND) | Ground reference | Common return path; requires 0.2 µF decoupling capacitor to VCC per datasheet layout guidance |
| 3 (nCASC) | Cascade Select Output | Active-Low signal indicating end-of-data; drives nCS of next device in daisy-chain configuration |
| 4 (DCLK) | Configuration clock | Rising-edge-triggered clock input/output - synchronizes bitstream transfer to FPGA DIN pin |
| 5 (WP) | Write Protect input | Hardware lock for lowest memory block during ISP; disabled by default (internal pull-down) |
| 7 (RESET/OE) | Reset/Output Enable | Programmable polarity pin: Low resets address counter and tri-states DATA; High enables output |
| 8 (SER_EN) | Serial Enable | High = FPGA loading mode; Low = 2-wire ISP programming mode - must tie to VCC for normal use |
| 10 (DATA) | Bi-directional data I/O | Open-collector, three-state output during configuration; bidirectional for ISP programming |
| 12 (VCC) | Power supply | Accepts 3.3V ±10% or 5.0V ±10%; internal charge pump enables programming at VCC only |
Key Features
| Feature | Design Value |
|---|---|
| In-system programmability | 2-wire serial interface (SER_EN + DATA/DCLK) eliminates need for dedicated programmers in deployed systems |
| Cascadable read-back | nCASC output enables seamless chaining of multiple AT17LV256A-10JI devices to support larger FPGA bitstreams |
| Programmable reset polarity | User-configurable RESET/OE logic polarity stored in EEPROM - ensures compatibility with diverse FPGA reset schemes |
| Low-power standby mode | ≤100 µA ICCS at 3.3V industrial grade - reduces system power budget during FPGA configuration idle periods |
| Hardware write protection | WP pin disables writes to lowest memory block during ISP - prevents accidental corruption of critical boot code |
Applications
| Industrial PLC Configuration | FPGA-Based Motor Control |
|---|---|
|
Use Scenario: Reconfigurable logic in factory automation controllers requiring field-upgradable FPGA firmware without hardware intervention. IC Role / Device Role / Timing Role: Serial configuration memory providing bitstream on power-up; synchronized to FPGA DCLK for deterministic load timing. Use Value: Enables zero-downtime firmware updates via ISP while maintaining industrial temperature rating and 90-year data retention. |
Use Scenario: Real-time motor drive systems using SRAM-based FPGAs for PWM generation and current loop control. IC Role / Device Role / Timing Role: Master serial configurator delivering bitstream to FPGA DIN pin; nCASC/nCS handshake ensures deterministic multi-FPGA initialization. Use Value: Guarantees sub-100 ns timing margins (TCAC ≤80 ns) between DCLK and DATA, meeting tight motor control timing constraints. |
| Avionics FPGA Boot Memory | Test Equipment Bitstream Storage |
|
Use Scenario: Ruggedized airborne computing modules where FPGA configuration must survive extended thermal cycling and vibration. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with 100,000 write cycles and 90-year retention at 85°C - validated for harsh environments. Use Value: Eliminates need for external backup power or refresh circuitry during power interruptions in flight-critical systems. |
Use Scenario: Automated test equipment (ATE) platforms requiring rapid FPGA reconfiguration across multiple test vectors. IC Role / Device Role / Timing Role: Cascadable EEPROM enabling >256 Kbit storage via daisy-chained AT17LV256A-10JI units for complex test pattern sets. Use Value: Supports <10 MHz DCLK (FMAX = 10 MHz industrial) for fast bitstream loading, reducing test cycle time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FPGA configuration memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Altera EPC1213 | Same 256-Kbit density and pin-compatible PLCC-20 package; requires external 5V supply only (no 3.3V option) | Designed exclusively for Altera FPGAs; lacks ISP capability and programmable reset polarity | Select EPC1213 only if legacy Altera-only design and no in-field reprogramming required |
| Xilinx XC18V02 | 2-Mbit capacity (8× larger); supports JTAG programming; requires 3.3V only; different pinout (20-pin SOIC vs PLCC) | Targeted for Xilinx Virtex/Spartan families; not pin-compatible; higher density suits complex multi-FPGA systems | Choose XC18V02 when migrating to Xilinx platforms or needing >256 Kbit capacity with JTAG support |
Compared with Altera EPC1213 and Xilinx XC18V02, the AT17LV256A-10JI uniquely combines industrial temperature rating, dual-voltage support, 2-wire ISP, and programmable reset polarity in a PLCC-20 footprint - making it optimal for mixed-vendor FPGA systems requiring field-upgradability and long-term reliability.
Availability
AT17LV256A-10JI is available at Aetrix Electronics and suitable for industrial PLC configuration, FPGA-based motor control, and avionics boot memory applications requiring stable component supply across extended product lifecycles.
Supply support for AT17LV256A-10JI 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 programmable logic solutions for industrial, automotive, and communications markets.
The AT17LV series was engineered specifically for FPGA configuration memory - prioritizing industrial reliability, in-system programmability, and seamless integration with Altera, Xilinx, and Lucent FPGA families.
FAQ
What is the primary function of the AT17LV256A-10JI in an FPGA system?
The AT17LV256A-10JI serves as a serial configuration EEPROM that stores and delivers the bitstream to SRAM-based FPGAs (e.g., Altera FLEX®, APEX™) during power-up or reset. It operates in master serial mode, using DCLK and DATA signals to synchronize configuration data transfer without requiring an external controller. Its industrial temperature rating and 90-year data retention make AT17LV256A-10JI ideal for mission-critical embedded FPGA deployments.
Does the AT17LV256A-10JI support in-system programming (ISP), and how is it enabled?
Yes, the AT17LV256A-10JI supports 2-wire in-system programming via the SER_EN and DATA/DCLK pins. ISP is activated by pulling SER_EN Low, which places the device into serial programming mode - allowing field updates without removal from the PCB. The AT17LV256A-10JI uses internal charge pumps to generate programming voltages from VCC alone, eliminating need for external high-voltage supplies. This capability is confirmed in the device's datasheet Section 7.
What package type and pin count does the AT17LV256A-10JI use, and is it interchangeable with other AT17LV variants?
The AT17LV256A-10JI uses a 20-lead Plastic Leaded Chip Carrier (PLCC) package (JEDEC MS-018, 20J), with identical pinout and footprint across the AT17LV65A/128A/256A family. This pin compatibility allows direct substitution among these densities in existing PLCC-20 layouts. However, AT17LV512A and higher-density variants add WP1 and READY pins not present on AT17LV256A-10JI, so they are not drop-in replacements.
How does the AT17LV256A-10JI handle cascading for larger FPGA configurations?
The AT17LV256A-10JI supports daisy-chain cascading using its nCASC output and nCS input. When the address counter reaches maximum value, nCASC asserts Low, disabling the current device's DATA line and enabling the next device's nCS - automatically transferring control to the subsequent AT17LV256A-10JI in the chain. This allows seamless expansion beyond 256 Kbit without external logic, as verified in the "Cascading Serial Configuration EEPROMs" section of the datasheet.
What are the key electrical differences between commercial and industrial versions of the AT17LV256A-10JI?
The AT17LV256A-10JI is the industrial-grade variant, specified for –40°C to +85°C operation with 5.0V ±10% or 3.3V ±10% supply tolerance. Its DC characteristics include higher standby current (100 µA vs 50 µA for commercial) and relaxed AC timing (e.g., FMAX = 10 MHz vs 12.5 MHz). Data retention is rated at 90 years at 85°C - versus 190 years at 70°C for commercial parts. These specifications ensure robustness in demanding industrial environments where the AT17LV256A-10JI is deployed.
AT17LV256A-10JI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 20-LCC (J-Lead)
- 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-PLCC (9x9)
AT17LV256A-10JI FAQ
1.How can I place an order for AT17LV256A-10JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT17LV256A-10JI 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 AT17LV256A-10JI reliable?
The price and inventory of AT17LV256A-10JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT17LV256A-10JI is usually 5 days.
3.What payment methods are accepted for AT17LV256A-10JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT17LV256A-10JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT17LV256A-10JI?
AT17LV256A-10JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT17LV256A-10JI 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 AT17LV256A-10JI?
For technical support, including AT17LV256A-10JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT17LV256A-10JI requirements.
6.How does Aetrix verify that AT17LV256A-10JI is sourced from the original manufacturer or authorized distributors?
All AT17LV256A-10JI 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 AT17LV256A-10JI meets industry standards.
7.What is the process for return or replacement of AT17LV256A-10JI?
All AT17LV256A-10JI units undergo pre-shipment inspection (PSI). If there is an issue with AT17LV256A-10JI, 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 AT17LV256A-10JI part is unused and in its original packaging.
Return procedure for AT17LV256A-10JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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