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Microchip Technology AT17LV256-10PC
- Part No.:
- AT17LV256-10PC
- Manufacturer:
- Microchip Technology
- Category:
- Configuration PROMs for FPGAs
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT17LV256-10PC.pdf
- Description:
- IC SER CNFIG PROM 256K 3.3V 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,761
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Product details
Overview
AT17LV256-10PC 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 compatibility with Xilinx XC3000/XC4000/Spartan FPGAs and Altera FLEX/APEX devices. It enables master-serial mode configuration of SRAM-based FPGAs without external controllers.
For engineers reviewing the AT17LV256-10PC datasheet, AT17LV256-10PC pinout, AT17LV256-10PC application, or AT17LV256-10PC equivalent, key selection criteria include voltage flexibility (3.3V/5V), cascading support via CEO output, low-power standby (<50 µA at 3.3V), industrial temperature range (–40°C to +85°C), and pin-compatible availability in 8-lead PDIP, SOIC, and LAP packages.
Technical Context
The AT17LV256-10PC operates in FPGA master-serial mode: CLK from the FPGA drives internal address counting; DATA outputs configuration bitstream directly to FPGA DIN; RESET/OE controls counter reset and output enable; CE enables data output and determines standby entry. SER_EN must be tied high during normal FPGA loading.
It supports daisy-chain configuration via CEO output-asserted low when its memory is exhausted-to automatically enable the next device's CE input. The device uses on-chip charge pumps for programming, eliminating external high-voltage requirements, and allows polarity programming of RESET/OE to match FPGA logic conventions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 256 Kbit (262,144 × 1-bit) nonvolatile EEPROM storage for FPGA configuration bitstreams |
| Supply voltage | 3.3 V ±10% or 5.0 V ±5% (commercial), ±10% (industrial); dual-voltage support simplifies board-level power design |
| Operating temperature | –40°C to +85°C (industrial grade); ensures reliability in embedded control and industrial automation environments |
| Standby current | <50 µA at 3.3 V; enables ultra-low-power system sleep modes without sacrificing configuration retention |
| Endurance | 100,000 write cycles; sufficient for repeated FPGA reconfiguration during development and field updates |
| Data retention | 90 years at 85°C (industrial); guarantees long-term bitstream integrity without refresh |
| Max clock frequency | 10 MHz at 3.3 V (industrial); matches typical FPGA CCLK timing budgets for reliable serial loading |
Pinout & Package
AT17LV256-10PC is available in 8-lead PDIP (8P3), 8-lead SOIC (8S1), and 8-lead LAP (8CN4) packages-pin-compatible footprints enabling drop-in substitution across form factors. All variants use identical pinout per Figure 2-1/2-2/2-3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 DATA | I/O (open-collector, tri-state) | Bi-directional serial data path: outputs configuration bits to FPGA DIN during load; accepts programming data in ISP mode |
| 2 CLK | Input | FPGA-generated clock that increments internal address/bit counter; synchronizes bitstream transfer |
| 3 RESET/OE | Input | Programmable active-Low RESET / active-High OE; resets address counter and controls DATA driver enable |
| 4 CE | Input (active Low) | Chip enable: enables counter and DATA output when low; forces low-power standby when high |
| 5 GND | Power reference | Ground return; requires 0.2 µF decoupling capacitor near VCC pin for noise immunity |
| 6 CEO | Output (active Low) | Cascading signal: goes low when last bit is read, enabling CE of next EEPROM in daisy chain |
| 7 SER_EN | Input | Serial enable: must be high for FPGA loading; pulled low to enter two-wire ISP programming mode |
| 8 VCC | Power supply | 3.3 V or 5.0 V supply; supports mixed-voltage system integration without level-shifting |
Key Features
| Feature | Design Value |
|---|---|
| In-system programmability (ISP) | Enables field firmware updates via two-wire bus without removing the device-critical for remote reconfiguration |
| Cascadable CEO output | Allows seamless chaining of multiple AT17LV devices to support larger FPGA configurations without external logic |
| Programmable reset polarity | Permits configuration to match FPGA-specific RESET/OE logic conventions (e.g., active-low reset, active-high OE) |
| Low-power standby mode | Draws <50 µA at 3.3 V when CE is high-reduces system power budget in always-on embedded applications |
| Emulation of AT24CXXX EEPROMs | Facilitates reuse of existing I²C infrastructure and firmware drivers in legacy systems requiring serial configuration memory |
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 serially delivers bitstream to Xilinx Spartan FPGA upon power-up or reset, acting as dedicated configuration memory. Use Value: Enables deterministic, repeatable FPGA initialization without host processor intervention-improving system uptime and reducing boot-time jitter. | Use Scenario: Loading configuration data into Xilinx Spartan-3 FPGAs used in high-speed digital I/O modules. IC Role / Device Role / Timing Role: Provides master-serial interface compliant with Spartan-3 CCLK/DIN timing requirements; CEO enables multi-device chaining for expanded logic density. Use Value: Eliminates need for external microcontroller or CPLD to manage configuration sequencing-reducing BOM count and PCB area. |
| Altera FLEX-Based Test Equipment | Automated Optical Inspection Systems |
Use Scenario: Storing multiple configuration images for different test patterns in semiconductor ATE platforms using Altera FLEX 10K FPGAs. IC Role / Device Role / Timing Role: Serial EEPROM delivering bitstream under FPGA-controlled CLK; WP pin protects critical configuration blocks from accidental overwrite. Use Value: Supports safe in-field reprogramming of test algorithms while preserving golden configuration-enhancing equipment serviceability and reducing downtime. | Use Scenario: Configuring vision-processing FPGAs in automated optical inspection (AOI) systems deployed in cleanroom manufacturing lines. IC Role / Device Role / Timing Role: Industrial-grade (–40°C to +85°C) configuration memory ensuring reliable startup across thermal cycling; low standby current extends system battery life during idle periods. Use Value: Guarantees consistent FPGA behavior over 90-year data retention-critical for mission-critical inspection accuracy and regulatory compliance. |
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; only 3.3V operation; no 5V support; different pinout and timing (TCK-driven, not CLK-driven) | Designed exclusively for Xilinx Virtex families; lacks CEO cascading and ISP capability | Select when targeting Virtex-4/Virtex-5 and requiring higher density; avoid if 5V compatibility or daisy-chain expansion is needed. |
| Microchip 25LC256 | 256-Kbit SPI EEPROM; no built-in FPGA interface logic (no CEO, RESET/OE, SER_EN); requires external controller for configuration | General-purpose serial memory; not optimized for FPGA master-serial boot; no automatic counter reset or cascading | Choose only for custom bootloader implementations where full control over timing and sequencing is required; adds design complexity vs. AT17LV256-10PC's plug-and-play FPGA integration. |
Compared with XC18V02 and 25LC256, the AT17LV256-10PC uniquely combines dual-voltage support, hardware-assisted daisy-chaining via CEO, and true in-system programmability-enabling simpler, more robust FPGA configuration in mixed-voltage industrial systems without external intelligence.
Availability
AT17LV256-10PC is available at Aetrix Electronics and suitable for industrial automation, FPGA-based test equipment, and embedded vision systems requiring stable component supply, long-life data retention, and seamless integration with Xilinx and Altera SRAM-FPGAs.
Supply support for AT17LV256-10PC 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 for industrial, automotive, and communications markets.
The AT17LV series was designed specifically as cost-effective, easy-to-integrate configuration memory for SRAM-based FPGAs-eliminating the need for external controllers and supporting direct master-serial boot across multiple vendors' devices.
FAQ
What is the primary function of the AT17LV256-10PC in an FPGA-based system?
The AT17LV256-10PC serves as a dedicated serial configuration memory that stores and delivers the FPGA bitstream during power-up or reset. It interfaces directly with the FPGA's CCLK and DIN pins in master-serial mode, enabling autonomous configuration without a host processor. The AT17LV256-10PC handles address counting, output enable, and cascading via CEO-making it a complete, self-contained solution for Xilinx and Altera SRAM-FPGA boot.
Does the AT17LV256-10PC support both 3.3V and 5.0V operation simultaneously?
No-the AT17LV256-10PC operates at either 3.3 V ±10% or 5.0 V ±5% (commercial) / ±10% (industrial), but not both simultaneously. The supply voltage must be selected at design time and applied consistently to VCC. Its dual-voltage specification means a single AT17LV256-10PC part can be used across 3.3V and 5V system designs-reducing inventory SKUs-provided the chosen voltage meets the target FPGA's I/O voltage requirements.
Can the AT17LV256-10PC be programmed in-circuit after soldering to the PCB?
Yes-the AT17LV256-10PC supports in-system programming (ISP) via its two-wire serial interface. By pulling SER_EN low, the device enters ISP mode and accepts programming commands through DATA and CLK pins. This allows field updates of FPGA configuration data without removing the AT17LV256-10PC from the board, using standard programmers like Atmel's ATDH2225 ISP Cable or compatible third-party tools.
What is the role of the CEO pin on the AT17LV256-10PC, and how is it used?
The CEO (Chip Enable Output) pin on the AT17LV256-10PC is an active-low signal that asserts when the device has delivered its final configuration bit. In a daisy-chain setup, CEO is connected to the CE input of the next AT17LV device, automatically enabling it to begin outputting its stored bitstream. This hardware handoff eliminates timing-critical software coordination and allows seamless expansion of total configuration memory-essential for large FPGAs or multi-FPGA systems.
Is the AT17LV256-10PC pin-compatible with other members of the AT17LV family?
The AT17LV256-10PC shares identical pinout with AT17LV65 and AT17LV128 in all supported packages (8-lead PDIP, SOIC, LAP), but is not pin-compatible with AT17LV512/010/002/040 devices-those use different pin assignments for WP1/WP2/READY and lack CEO on certain variants. Always verify package-specific pin mapping from Table 1-1 and Figures 2-1 through 2-7 before substituting across AT17LV size grades.
AT17LV256-10PC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Programmable Type:
- Serial EEPROM
- Memory Size:
- 256Kb
- Voltage - Supply:
- 3V ~ 3.6V, 4.75V ~ 5.25V
- Operating Temperature:
- 0°C ~ 70°C
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT17LV256-10PC FAQ
1.How can I place an order for AT17LV256-10PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT17LV256-10PC 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 AT17LV256-10PC reliable?
The price and inventory of AT17LV256-10PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT17LV256-10PC is usually 5 days.
3.What payment methods are accepted for AT17LV256-10PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT17LV256-10PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT17LV256-10PC?
AT17LV256-10PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT17LV256-10PC 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 AT17LV256-10PC?
For technical support, including AT17LV256-10PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT17LV256-10PC requirements.
6.How does Aetrix verify that AT17LV256-10PC is sourced from the original manufacturer or authorized distributors?
All AT17LV256-10PC 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 AT17LV256-10PC meets industry standards.
7.What is the process for return or replacement of AT17LV256-10PC?
All AT17LV256-10PC units undergo pre-shipment inspection (PSI). If there is an issue with AT17LV256-10PC, 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 AT17LV256-10PC part is unused and in its original packaging.
Return procedure for AT17LV256-10PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT17LV256-10PC Tags
-
AT17LV512A-10PU
Microchip Technology
-
EPCQ4ASI8N
Intel
-
AT17LV256-10PU
Microchip Technology
-
AT17LV256-10NU
Microchip Technology
-
EPCQ16ASI8N
Intel
-
AT17LV010-10PU
Microchip Technology
-
EPCQ32ASI8N
Intel
-
EPCQ64ASI16N
Intel
-
EPCQ128ASI16N
Intel
-
AT17LV512A-10JU
Microchip Technology
-
AT17LV512-10JU
Microchip Technology
-
AT17LV010-10JU
Microchip Technology
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