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Microchip Technology AT17LV256-10PI
- Part No.:
- AT17LV256-10PI
- Manufacturer:
- Microchip Technology
- Category:
- Configuration PROMs for FPGAs
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT17LV256-10PI.pdf
- Description:
- IC SRL CONFIG EEPROM 256K 8-DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,812
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Product details
Overview
AT17LV256-10PI from Microchip Technology (formerly Atmel) is a 256-Kbit serial EEPROM FPGA configuration memory with programmable reset polarity, supporting both 3.3V and 5.0V operation, in-system programmability via two-wire bus, and cascading capability for multi-FPGA systems. It delivers 10 MHz max clock frequency at 3.3V and features 100,000 write cycles with 90-year data retention at 85°C (industrial grade).
For engineers reviewing the AT17LV256-10PI datasheet, AT17LV256-10PI pinout, AT17LV256-10PI application, or AT17LV256-10PI equivalent, this page provides verified package mapping (8-lead PDIP), confirmed pin functions (CE, RESET/OE, CLK, DATA, SER_EN, CEO, GND, VCC), industrial temperature range (-40°C to +85°C), standby current <100 µA at 3.3V, and compatibility with Xilinx XC4000/XC5200/Spartan, Altera FLEX/APEX, and Atmel AT40K/AT94K FPGAs.
Technical Context
The AT17LV256-10PI implements a serial master-configuration interface for SRAM-based FPGAs, using a simple clocked read protocol where the FPGA drives CLK and CE while reading DATA. Its internal address counter auto-resets on power-up and on active-low RESET/OE assertion, enabling deterministic boot sequencing.
It supports cascaded daisy-chain configurations via CEO output - asserted low when final bit is read - which enables automatic handoff to the next EEPROM in chain. The device operates in two distinct modes: FPGA loading (SER_EN = high) and ISP programming (SER_EN = low), with separate write-protection logic (WP pin active only during programming).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 256 Kbit (262,144 × 1-bit), sufficient to configure mid-density Xilinx XC4000 or Spartan devices |
| Supply voltage | 3.3V ±10% or 5.0V ±5% (commercial) / ±10% (industrial); dual-voltage support simplifies legacy 5V and modern 3.3V system integration |
| Max clock frequency | 10 MHz at 3.3V (industrial), enabling ≤100 ns read cycle time for fast FPGA startup |
| Write endurance | 100,000 program/erase cycles - supports repeated field reconfiguration during development and firmware updates |
| Data retention | 90 years at 85°C (industrial grade), ensuring long-term reliability in embedded control and telecom infrastructure |
| Standby current | <100 µA at 3.3V (industrial), critical for low-power always-on systems with infrequent reconfiguration |
| Operating temperature | -40°C to +85°C, qualified for industrial automation, motor drives, and outdoor communications equipment |
Pinout & Package
AT17LV256-10PI is packaged in an 8-lead plastic dual in-line package (PDIP), 0.300" wide, with industry-standard footprint compatible with socketed prototyping and legacy PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 – DATA | I/O (open-collector) | Bi-directional serial data line: outputs configuration bits during FPGA load; accepts programming data during ISP mode |
| 2 – CLK | Input | FPGA-driven clock input that increments internal address counter; timing-critical path for configuration speed |
| 3 – RESET/OE | Input | Programmable polarity pin: resets address counter (active low) and enables DATA output driver (active high); default is RESET-active-low/OE-active-high |
| 4 – CE | Input (active low) | Chip enable controls address counter and DATA driver activation; high state forces low-power standby (<100 µA) |
| 5 – GND | Power reference | Ground return; requires 0.2 µF decoupling capacitor near VCC–GND for noise immunity during high-speed reads |
| 6 – CEO | Output (active low) | Cascading enable output: goes low after last bit is read, triggering next EEPROM in daisy chain; essential for multi-FPGA or high-density configs |
| 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 | 3.3V or 5.0V supply input; supports mixed-voltage board designs without level-shifting |
Key Features
| Feature | Design Value |
|---|---|
| In-system programmability (ISP) | Enables field firmware updates via two-wire bus without removing device from PCB - reduces service downtime and supports remote reconfiguration |
| Cascadable CEO output | Allows seamless chaining of multiple AT17LV256-10PI units to support larger FPGA bitstreams or multi-device systems without external logic |
| Programmable reset polarity | User-configurable RESET/OE behavior ensures compatibility with diverse FPGA families (Xilinx, Altera, Atmel) regardless of native reset signal convention |
| Low-power standby mode | CE-high state draws <100 µA at 3.3V, making it suitable for battery-backed or energy-sensitive industrial controllers |
| Green (RoHS-compliant) options | Pb/halide-free packaging variants (e.g., AT17LV256-10PU) available for environmentally regulated deployments |
Applications
| Industrial PLC Configuration | Xilinx Spartan-Based Motor Drive |
|---|---|
Use Scenario: Reconfiguring FPGA logic in programmable logic controllers during firmware upgrades or parameter tuning in factory automation lines. IC Role / Device Role / Timing Role: Stores and serially delivers full bitstream to Xilinx Spartan FPGA upon power-up or command, synchronized to CCLK. Use Value: Enables zero-downtime field updates via ISP; industrial temp rating (-40°C to +85°C) ensures stable operation in unconditioned control cabinets. | Use Scenario: Booting motor control algorithms into Spartan FPGA in variable-frequency drives used in HVAC and pumping systems. IC Role / Device Role / Timing Role: Master serial configuration memory providing deterministic, glitch-free bitstream delivery under EMI-prone industrial environments. Use Value: CEO cascading allows expansion to dual-FPGA architectures; 10 MHz clock support meets tight startup timing budgets (<10 ms). |
| Altera FLEX-Based Test Equipment | Atmel AT40K-Based Communications Module |
Use Scenario: Loading custom test pattern generators into Altera FLEX FPGAs inside automated circuit board testers. IC Role / Device Role / Timing Role: Configuration EEPROM interfacing directly with FPGA's master serial pins (DIN, CCLK, nCONFIG), eliminating need for microcontroller co-processor. Use Value: Dual-voltage (3.3V/5V) support allows reuse across legacy 5V tester platforms and newer 3.3V designs; WP pin prevents accidental reprogramming during test cycles. | Use Scenario: Storing protocol stack and interface logic for Atmel AT40KAL FPGA in wireless baseband modules for point-to-point radios. IC Role / Device Role / Timing Role: Dedicated configuration memory with programmable reset polarity matching AT40KAL's nCONFIG/nSTATUS signaling requirements. Use Value: 90-year data retention guarantees bitstream integrity over product lifetime in sealed outdoor enclosures; PDIP package eases manual rework and qualification. |
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; supports only 3.3V; no ISP capability; different pinout (20-pin PLCC/TQFP only) | Targeted for larger Xilinx Virtex FPGAs; lacks in-system reprogrammability and dual-voltage flexibility | Select when higher density is required and ISP is unnecessary; verify PCB layout compatibility due to non-pin-compatible package |
| Microchip (Atmel) AT17LV512-10PI | 512-Kbit capacity; identical pinout, timing, and feature set; same 8-lead PDIP package and industrial temp rating | Used for larger FPGA configurations (e.g., XC5200, APEX EP20K), requiring double the storage of AT17LV256-10PI | Drop-in upgrade path when bitstream size exceeds 256 Kbit; no PCB changes required - same footprint, voltage, and timing margins |
Compared with XC18V02, AT17LV256-10PI offers field-upgradable configuration and dual-voltage support but lower density; versus AT17LV512-10PI, it provides optimal cost/performance for mid-range FPGAs without over-provisioning memory.
Availability
AT17LV256-10PI is available at Aetrix Electronics and suitable for industrial automation, FPGA-based motor drives, communications infrastructure, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT17LV256-10PI 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 acquired Atmel in 2016 and maintains full support for legacy Atmel FPGA configuration products, including manufacturing, documentation, and technical assistance.
The AT17LV series was designed specifically for reliable, low-cost, serial FPGA configuration in industrial and commercial systems - emphasizing ease of use, cascading scalability, and robustness across voltage and temperature extremes.
FAQ
What is the maximum clock frequency supported by AT17LV256-10PI at industrial temperature?
The AT17LV256-10PI supports a maximum clock frequency of 10 MHz when operating at 3.3V and within the industrial temperature range (-40°C to +85°C). This value is specified in the AC Characteristics table (Section 17) of the datasheet and ensures reliable timing margin for FPGA configuration startup sequences in demanding environments.
Does AT17LV256-10PI support in-system programming (ISP), and what interface is used?
Yes, AT17LV256-10PI supports in-system programming via a two-wire serial bus. This is enabled by pulling the SER_EN pin low, allowing field reprogramming without device removal. The interface uses dedicated CLK and DATA lines, with CE and RESET/OE controlling access - all fully documented in Section 9 of the AT17LV256-10PI datasheet.
Can AT17LV256-10PI be used with both 3.3V and 5.0V FPGA systems?
Yes, AT17LV256-10PI is explicitly rated for dual-voltage operation: 3.3V ±10% and 5.0V ±5% (commercial) or ±10% (industrial). Its I/O thresholds (VIH = 2.0V min, VIL = 0.8V max) ensure interoperability with both 3.3V and 5V FPGA families, including Xilinx XC4000, Spartan, and Altera FLEX devices.
What is the purpose of the CEO pin on AT17LV256-10PI, and how is it used?
The CEO (Chip Enable Output) pin on AT17LV256-10PI is an active-low signal that asserts after the final configuration bit is read. In cascaded configurations, it connects to the CE input of the next AT17LV256-10PI (or compatible device) to automatically enable sequential bitstream loading - eliminating need for external glue logic or FPGA-controlled handshaking.
Is AT17LV256-10PI RoHS-compliant, and are green package options available?
Yes, AT17LV256-10PI has RoHS-compliant green package variants, including AT17LV256-10PU (8-lead PDIP) and AT17LV256-10NU (8-lead SOIC), both Pb/halide-free. These are listed in Section 22.2 of the official datasheet and meet global environmental compliance requirements for industrial and commercial deployments.
AT17LV256-10PI 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, 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT17LV256-10PI FAQ
1.How can I place an order for AT17LV256-10PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT17LV256-10PI 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 AT17LV256-10PI reliable?
The price and inventory of AT17LV256-10PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT17LV256-10PI is usually 5 days.
3.What payment methods are accepted for AT17LV256-10PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT17LV256-10PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT17LV256-10PI?
AT17LV256-10PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT17LV256-10PI 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 AT17LV256-10PI?
For technical support, including AT17LV256-10PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT17LV256-10PI requirements.
6.How does Aetrix verify that AT17LV256-10PI is sourced from the original manufacturer or authorized distributors?
All AT17LV256-10PI 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 AT17LV256-10PI meets industry standards.
7.What is the process for return or replacement of AT17LV256-10PI?
All AT17LV256-10PI units undergo pre-shipment inspection (PSI). If there is an issue with AT17LV256-10PI, 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 AT17LV256-10PI part is unused and in its original packaging.
Return procedure for AT17LV256-10PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT17LV256-10PI 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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