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Microchip Technology AT17LV256-10NI
- Part No.:
- AT17LV256-10NI
- Manufacturer:
- Microchip Technology
- Category:
- Configuration PROMs for FPGAs
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT17LV256-10NI.pdf
- Description:
- IC EEPROM FPGA 256KB 8-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,758
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Product details
Overview
AT17LV256-10NI from Atmel is a 256-Kbit (262,144 × 1-bit) serial EEPROM FPGA configuration memory supporting both 3.3V and 5.0V operation, featuring in-system programmability via two-wire bus, programmable reset polarity, and cascading capability for multi-FPGA systems. It targets SRAM-based FPGA configuration in industrial embedded control and reconfigurable logic systems.
For engineers reviewing the AT17LV256-10NI datasheet, AT17LV256-10NI pinout, AT17LV256-10NI application, or AT17LV256-10NI equivalent, key selection criteria include industrial temperature range (−40°C to +85°C), 8-lead SOIC package compatibility, low-power standby current (<100 µA at 3.3V), CEO output for daisy-chain configuration, and support for Xilinx XC4000/XC5200 and Altera FLEX/APEX devices.
Technical Context
The AT17LV256-10NI operates in Master Serial mode, interfacing directly with FPGA CCLK and DIN pins using synchronous serial readout. Its internal address counter auto-resets on power-up and responds to RESET/OE (active-low) and CE (active-low) control signals to manage data output timing and tri-state behavior.
It supports cascaded configuration via CEO output-driven low upon reaching end-of-memory-to enable the next device in chain. Programming occurs in Two-Wire Serial mode when SER_EN is pulled low, enabling industry-standard programmers without external high-voltage sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 262,144 × 1-bit (256 Kbit) nonvolatile EEPROM storage for full FPGA bitstream |
| Supply voltage | 3.3V (±10%) or 5.0V (±10% industrial); dual-voltage support simplifies legacy and modern system integration |
| Operating temperature | −40°C to +85°C industrial grade; ensures reliability in factory automation and outdoor telecom equipment |
| Standby current | <100 µA at 3.3V; enables low-power hold during FPGA idle states without battery drain |
| Max clock frequency | 10 MHz (3.3V, industrial); sustains fast configuration load times for XC5200-class FPGAs |
| Data retention | 90 years at 85°C; meets long-lifecycle requirements for industrial infrastructure deployments |
| Endurance | 100,000 write cycles; sufficient for field firmware updates and reconfiguration in test/production environments |
Pinout & Package
AT17LV256-10NI is packaged in an 8-lead SOIC (8S1), pin-compatible with 8-lead LAP and PDIP footprints. The SOIC package measures 5.0 mm × 4.0 mm × 1.75 mm (JEDEC MS-012 AA), with gull-wing leads and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 DATA | I/O (open-collector) | Bi-directional serial data line; drives FPGA DIN during configuration; open-drain allows wired-OR in daisy chains |
| 2 CLK | Input | FPGA CCLK-synchronized clock input; increments internal address/bit counter on rising edge |
| 3 RESET/OE | Input | Active-low reset + active-high output enable; polarity programmable; resets address counter and tri-states DATA |
| 4 CE | Input (active low) | Chip enable; disables address counter and forces standby mode when high; ignored during ISP (SER_EN = low) |
| 5 GND | Power | Ground reference; requires 0.2 µF decoupling capacitor near VCC–GND |
| 6 CEO | Output (active low) | Chain-enable output; goes low at end-of-memory to trigger next EEPROM in cascade; not present on AT17LV65 |
| 7 SER_EN | Input | Serial enable; must be tied to VCC for FPGA loading; pulled low to enter Two-Wire ISP programming mode |
| 8 VCC | Power | 3.3V/5.0V supply input; accepts ±10% tolerance at industrial temp; internal regulation eliminates need for external LDO |
Key Features
| Feature | Design Value |
|---|---|
| In-system programmability | Two-wire serial interface (SER_EN + CLK/DATA) enables field firmware updates without socket removal or UV erasers |
| Cascadable read-back | CEO output synchronizes multi-device daisy chains, eliminating external logic for >256Kbit FPGA configurations |
| Programmable reset polarity | User-configurable RESET/OE logic mapping accommodates both Xilinx (RESET active low) and Altera (OE active high) FPGA timing requirements |
| Low-power standby mode | CE-driven <100 µA shutdown reduces system-level quiescent current in always-on industrial controllers |
| Emulation of AT24CXXX | Pin- and protocol-compatible with standard I²C EEPROMs, easing migration from generic config memory to FPGA-optimized devices |
Applications
| Industrial PLC Configuration | Xilinx XC4000-Based Prototyping |
|---|---|
Use Scenario: Reconfigurable logic modules in programmable logic controllers require persistent, tamper-resistant bitstream storage across power cycles and firmware updates. IC Role / Device Role / Timing Role: AT17LV256-10NI serves as master serial configuration memory, loaded by XC4010E CCLK at 10 MHz to initialize gate array logic on power-up. Use Value: 90-year data retention and −40°C to +85°C operation ensure decades of unattended operation in factory-floor environments. | Use Scenario: Rapid hardware iteration in lab environments demands reliable, reprogrammable configuration storage for XC4000-series FPGAs without soldering changes. IC Role / Device Role / Timing Role: Acts as bitstream source in Master Serial mode; CEO enables chaining with AT17LV512-10JI for larger designs. Use Value: In-system programmability via two-wire bus allows bitstream updates over JTAG adapter without removing the SOIC package. |
| Altera FLEX 10K System Boot | Multi-FPGA Telecommunications Shelf |
Use Scenario: Telecom line cards use FLEX 10KA FPGAs for channel aggregation; configuration must survive thermal cycling and vibration. IC Role / Device Role / Timing Role: Provides 256-Kbit configuration image; RESET/OE polarity programmed to match FLEX OE-active-high timing. Use Value: Industrial-grade SOIC packaging and 100,000 write cycles support repeated field upgrades during network maintenance windows. | Use Scenario: High-density optical transport shelves integrate multiple Virtex FPGAs requiring coordinated, synchronized boot sequences. IC Role / Device Role / Timing Role: First-stage configurator in daisy chain; CEO output triggers AT17LV010-10JI to load secondary FPGA logic. Use Value: Cascading eliminates need for external sequencers or microcontrollers, reducing BOM count and board area. |
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; uses JTAG programming interface | Targeted for Xilinx-only ecosystems; lacks cascading support and dual-voltage flexibility | Select when higher density and Xilinx-native toolchain integration outweigh need for industrial temp and multi-vendor FPGA compatibility |
| Microchip 25LC256 | 256-Kbit SPI EEPROM; no CEO or RESET/OE; requires external controller for FPGA config sequencing | Suitable only for microcontroller-managed FPGA loads; not compatible with Master Serial mode | Choose only if existing SPI infrastructure exists and FPGA configuration is handled by host MCU-not direct FPGA-initiated load |
Compared with XC18V02 and 25LC256, AT17LV256-10NI uniquely combines industrial temperature rating, dual-voltage operation, built-in CEO cascading, and FPGA-native Master Serial timing-enabling direct, controllerless configuration of Xilinx, Altera, and Atmel FPGAs without layout or firmware redesign.
Availability
AT17LV256-10NI is available at Aetrix Electronics and suitable for industrial automation, telecommunications infrastructure, and reconfigurable computing applications requiring stable component supply across extended product lifecycles.
Supply support for AT17LV256-10NI 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 specifically for reliable, low-pin-count serial configuration of SRAM-based FPGAs-including Xilinx XC3000/XC4000, Altera FLEX/APEX, and Atmel AT40K/AT94K families-in industrial and commercial environments.
FAQ
What is the memory organization of the AT17LV256-10NI?
The AT17LV256-10NI provides 262,144 × 1-bit (256 Kbit) serial EEPROM memory organized as a single linear address space. This structure delivers full FPGA bitstream storage for devices like Xilinx XC4010E or Altera EPF10K10, with sequential readout triggered by FPGA CCLK. No internal page boundaries or sector erase commands exist-configuration is loaded as a continuous stream.
Does the AT17LV256-10NI support both 3.3V and 5.0V FPGA systems?
Yes, the AT17LV256-10NI supports dual-voltage operation: 3.3V (±10%) and 5.0V (±10% industrial). Its I/O thresholds (VIH ≥ 2.0V, VIL ≤ 0.8V) and output drive strength (VOH ≥ 2.4V at 3.3V, VOH ≥ 3.6V at 5V) ensure interoperability with both 3.3V and 5V FPGAs without level-shifting. This eliminates separate BOM variants for mixed-voltage system designs.
How does the CEO pin function in a daisy-chained configuration using AT17LV256-10NI?
The CEO pin on AT17LV256-10NI is an active-low chip-enable output that asserts low when its internal address counter reaches the final memory location. In a daisy chain, this signal connects directly to the CE input of the next AT17LV device (e.g., AT17LV512-10JI), automatically enabling it to begin outputting its bitstream-no external logic or timing control is required. CEO remains low until the entire chain completes or RESET/OE is pulsed.
Can the AT17LV256-10NI be reprogrammed in the field without removing it from the PCB?
Yes, the AT17LV256-10NI supports in-system programming (ISP) via its two-wire serial interface. By pulling SER_EN low and applying clock/data signals through dedicated ISP pins (CLK and DATA), the device enters programming mode and accepts new configuration data at VCC voltage-no external high-voltage programmer or socket removal is needed. This enables field firmware updates and design iterations without hardware intervention.
What is the significance of the "-10NI" suffix in AT17LV256-10NI?
The "-10NI" suffix identifies the specific variant: "10" denotes 10 ns access timing grade, "N" specifies 8-lead SOIC (8S1) package, and "I" indicates industrial temperature range (−40°C to +85°C). This distinguishes it from commercial-grade versions (e.g., AT17LV256-10NC) and alternate packages like PDIP (P) or PLCC (J). The SOIC footprint ensures drop-in compatibility with 8-lead LAP and PDIP layouts.
AT17LV256-10NI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- 8-SOIC
AT17LV256-10NI FAQ
1.How can I place an order for AT17LV256-10NI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT17LV256-10NI 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 AT17LV256-10NI reliable?
The price and inventory of AT17LV256-10NI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT17LV256-10NI is usually 5 days.
3.What payment methods are accepted for AT17LV256-10NI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT17LV256-10NI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT17LV256-10NI?
AT17LV256-10NI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT17LV256-10NI 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 AT17LV256-10NI?
For technical support, including AT17LV256-10NI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT17LV256-10NI requirements.
6.How does Aetrix verify that AT17LV256-10NI is sourced from the original manufacturer or authorized distributors?
All AT17LV256-10NI 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 AT17LV256-10NI meets industry standards.
7.What is the process for return or replacement of AT17LV256-10NI?
All AT17LV256-10NI units undergo pre-shipment inspection (PSI). If there is an issue with AT17LV256-10NI, 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 AT17LV256-10NI part is unused and in its original packaging.
Return procedure for AT17LV256-10NI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT17LV256-10NI Tags
-
AT17LV512A-10PU
Microchip Technology
-
EPCQ4ASI8N
Intel
-
AT17LV256-10PU
Microchip Technology
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AT17LV256-10NU
Microchip Technology
-
EPCQ16ASI8N
Intel
-
AT17LV010-10PU
Microchip Technology
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EPCQ32ASI8N
Intel
-
EPCQ64ASI16N
Intel
-
EPCQ128ASI16N
Intel
-
AT17LV512A-10JU
Microchip Technology
-
AT17LV512-10JU
Microchip Technology
-
AT17LV010-10JU
Microchip Technology
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