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Microchip Technology AT17LV256-10JU
- Part No.:
- AT17LV256-10JU
- Manufacturer:
- Microchip Technology
- Category:
- Configuration PROMs for FPGAs
- Package:
- 20-LCC (J-Lead)
- Datasheet:
-
AT17LV256-10JU.pdf
- Description:
- IC SRL CONFG EEPROM 256K 20-PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,417
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Product details
Overview
AT17LV256-10JU from Microchip Technology (formerly Atmel) is a 256-kbit FPGA configuration EEPROM designed to store and serially load bitstream data into SRAM-based FPGAs. It supports both 3.3V and 5.0V systems, features in-system programmability via 2-wire bus, programmable reset polarity, and cascading capability via CEO output. It is used in industrial FPGA-based systems requiring reliable, low-power nonvolatile configuration storage.
For engineers reviewing the AT17LV256-10JU datasheet, AT17LV256-10JU pinout, AT17LV256-10JU application, or AT17LV256-10JU equivalent, key selection criteria include voltage compatibility (3.3V/5.0V), 20-lead PLCC package footprint, cascading support for multi-FPGA designs, standby current ≤100 μA at 3.3V, and industrial temperature range (–40°C to +85°C).
Technical Context
The AT17LV256-10JU operates in Master Serial mode, interfacing directly with FPGA CCLK and DIN pins using simple synchronous serial protocol. Its internal address counter advances on CLK edges, and DATA output is tri-stated during reset or CE high, eliminating bus contention in daisy-chained configurations.
It implements EEPROM cell matrix with column/row decoding, power-on reset logic, and SER_EN-controlled 2-wire ISP mode. The CEO output enables automatic handoff to the next device in cascade chains, while RESET/OE polarity is user-programmable during programming-not runtime configurable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 262,144 × 1-bit (256 kbit) - stores full configuration bitstream for mid-density SRAM FPGAs like Xilinx XC4000 or Altera FLEX series. |
| Supply Voltage | 3.0 V to 5.5 V - dual-voltage operation allows direct integration into legacy 5V or modern 3.3V FPGA systems without level-shifting. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including factory automation and outdoor embedded controllers. |
| Standby Current | ≤100 μA at 3.3V - enables low-power system sleep modes without compromising configuration retention. |
| Max Clock Frequency | 10 MHz at 3.3V - supports fast FPGA configuration startup times (<26 ms for full 256 kbit at 10 MHz). |
| Data Retention | 90 years at 85°C - ensures long-term reliability in unattended or maintenance-limited deployments. |
| Write Endurance | 100,000 cycles - sufficient for field reprogramming during development, firmware updates, or partial reconfiguration workflows. |
Pinout & Package
AT17LV256-10JU is packaged in a 20-lead Plastic Leaded Chip Carrier (PLCC) with J-lead profile, 1.27 mm pitch, and 9.78 mm × 9.78 mm body size. Pin 1 identifier is marked by a corner chamfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DATA | Three-state bidirectional I/O | Open-collector output during FPGA loading; bidirectional for 2-wire ISP programming - requires external pull-up for proper logic levels. |
| CLK | Input | Edge-triggered clock synchronizing address increment and data output - directly driven by FPGA CCLK signal. |
| RESET/OE | Input | Programmable active-low reset / active-high output enable - resets address counter and controls DATA driver state; polarity set during programming. |
| CE | Input | Active-low chip enable - disables address counter and forces DATA into high-impedance when high, enabling low-power standby mode. |
| GND | Power | Ground reference - requires 0.2 μF decoupling capacitor between VCC and GND per datasheet recommendation. |
| CEO | Output | Cascade enable output - goes low after final bit read to enable next device's CE input in daisy-chain configurations. |
| A2 | Input | Device selection input with internal pull-down - used only during 2-wire ISP programming to select device in multi-unit setups. |
| SER_EN | Input | Serial enable - must be tied high for FPGA configuration mode; pulled low to enter 2-wire ISP programming mode. |
| VCC | Power | Primary supply - accepts 3.3V ±10% or 5.0V ±10%; internal charge pump generates programming voltage. |
Key Features
| Feature | Design Value |
|---|---|
| In-system programmability | Enables field updates of FPGA configuration without removing the device - uses standard 2-wire interface compatible with Atmel ATDH2225 ISP Cable. |
| Cascadable CEO output | Allows daisy-chaining multiple AT17LV256-10JU devices to support larger FPGA configurations or multi-FPGA boards without external logic. |
| Programmable reset polarity | Permits matching FPGA reset timing requirements (active-low or active-high) during initial programming - no hardware modification needed. |
| Low-power standby mode | Draws ≤100 μA at 3.3V when CE = high - reduces system-level quiescent power in battery-backed or energy-sensitive applications. |
| Green RoHS-compliant packaging | Sn lead finish in 20J PLCC package meets Pb-free, halogen-free regulatory requirements for industrial and commercial deployments. |
Applications
| Industrial PLC Configuration Storage | FPGA-Based Motor Control Systems |
|---|---|
Use Scenario: Storing FPGA configuration bitstreams for programmable logic controllers deployed in factory automation cabinets with wide ambient temperature swings. IC Role / Device Role / Timing Role: Nonvolatile configuration memory providing deterministic boot-time FPGA initialization upon power-up or cold restart. Use Value: Ensures zero-config downtime after power loss; 90-year data retention eliminates periodic reprogramming maintenance. | Use Scenario: Configuring SRAM FPGAs used in real-time servo drive controllers where deterministic startup latency and EMI resilience are critical. IC Role / Device Role / Timing Role: Synchronous serial configurator synchronized to FPGA CCLK, delivering bitstream under precise timing control. Use Value: 10 MHz max clock supports sub-26 ms full configuration - meets <30 ms safety-critical boot window requirements. |
| Multi-FPGA Telecommunications Line Cards | Reconfigurable Test Equipment |
Use Scenario: Cascading multiple AT17LV256-10JU devices on a single line card to configure several Xilinx Virtex FPGAs handling different protocol stacks. IC Role / Device Role / Timing Role: CEO-driven daisy-chain master/slave configuration sequencer enabling coordinated, glitch-free FPGA initialization. Use Value: Eliminates need for external microcontroller or CPLD to manage multi-device configuration sequencing. | Use Scenario: Field-upgradable test instrument platforms using FPGAs for signal generation and analysis, requiring frequent bitstream revisions. IC Role / Device Role / Timing Role: In-system programmable configuration memory supporting over-the-air or USB-based firmware updates without hardware intervention. Use Value: 100,000 write cycles allow >27 years of daily reprogramming at one update per day - exceeds product lifecycle. |
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 density (8× larger), same 3.3V/5V support, but only available in 20-lead PLCC and 44-lead TQFP - no 8-lead options. | Supports higher-density FPGAs (e.g., Virtex-II); not suitable for space-constrained PCBs targeting AT17LV256-10JU's 256-kbit footprint. | Select when >256 kbit storage is required and board layout accommodates same 20J footprint or larger package. |
| Microchip AT17LV512-10JU | 512-kbit density (2× larger), identical pinout, package, voltage, and timing specs - drop-in upgrade path with no layout change. | Enables future-proofing for FPGA bitstream growth without redesign; shares same industrial temp rating and RoHS compliance. | Preferred for new designs needing headroom; retains full compatibility while doubling configuration capacity. |
Compared with XC18V02 and AT17LV512-10JU, AT17LV256-10JU offers optimal cost/performance balance for mid-density FPGA configurations in space-constrained industrial layouts, with verified 20J PLCC compatibility and proven field reliability across decades of deployment.
Availability
AT17LV256-10JU is available at Aetrix Electronics and suitable for industrial PLCs, FPGA-based motor drives, telecommunications line cards, and reconfigurable test equipment requiring stable component supply across extended product lifecycles.
Supply support for AT17LV256-10JU 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 EEPROMs, including manufacturing, documentation, and technical assistance.
The AT17LV family was designed specifically for reliable, low-pin-count serial configuration of SRAM-based FPGAs in industrial and telecom infrastructure - emphasizing simplicity, cascading capability, and long-term data integrity.
FAQ
What is the memory organization of the AT17LV256-10JU?
The AT17LV256-10JU provides 262,144 × 1-bit (256 kbit) of EEPROM storage arranged as a serial-access memory array. This organization delivers a single-bit-wide data stream synchronized to CLK, optimized for sequential loading into SRAM-based FPGAs such as Xilinx XC4000 or Altera FLEX devices. The AT17LV256-10JU does not support random access or byte-wide reads.
Does the AT17LV256-10JU support both 3.3V and 5.0V operation?
Yes, the AT17LV256-10JU supports dual-voltage operation across 3.0 V to 5.5 V, meeting both 3.3V ±10% and 5.0V ±10% specifications. This allows direct integration into mixed-voltage FPGA systems without level translation. The AT17LV256-10JU's DC and AC characteristics - including 10 MHz max clock frequency at 3.3V and ≤100 μA standby current - are validated across this full voltage range.
Can the AT17LV256-10JU be used in cascaded configurations?
Yes, the AT17LV256-10JU supports hardware cascading via its CEO (Chip Enable Output) pin, which asserts low after the final bit is read to automatically enable the CE input of the next device in a daisy chain. This feature is explicitly confirmed for AT17LV256 in Table 1-2 and Figure 1-1 of the datasheet. The AT17LV256-10JU's CEO functionality enables seamless expansion beyond 256 kbit without external control logic.
What is the purpose of the SER_EN pin on the AT17LV256-10JU?
The SER_EN (Serial Enable) pin on the AT17LV256-10JU selects operational mode: when held high, it enables standard FPGA configuration mode; when pulled low, it activates 2-wire serial programming mode for in-system reprogramming. For normal operation, SER_EN must be tied to VCC. The AT17LV256-10JU relies on this pin to isolate configuration and programming functions electrically and logically.
Is the AT17LV256-10JU pin-compatible with other AT17LV variants in the 20J package?
Yes, the AT17LV256-10JU shares identical pinout and electrical behavior with AT17LV512-10JU and AT17LV010-10JU in the 20-lead PLCC (20J) package, as confirmed in Table 1-2 and Figure 1-1 of the datasheet. This allows direct replacement with higher-density variants without PCB changes - though firmware and system timing must accommodate increased memory size when upgrading to AT17LV512-10JU or AT17LV010-10JU.
AT17LV256-10JU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 20-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- 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)
AT17LV256-10JU FAQ
1.How can I place an order for AT17LV256-10JU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT17LV256-10JU 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 AT17LV256-10JU reliable?
The price and inventory of AT17LV256-10JU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT17LV256-10JU is usually 5 days.
3.What payment methods are accepted for AT17LV256-10JU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT17LV256-10JU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT17LV256-10JU?
AT17LV256-10JU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT17LV256-10JU 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 AT17LV256-10JU?
For technical support, including AT17LV256-10JU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT17LV256-10JU requirements.
6.How does Aetrix verify that AT17LV256-10JU is sourced from the original manufacturer or authorized distributors?
All AT17LV256-10JU 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 AT17LV256-10JU meets industry standards.
7.What is the process for return or replacement of AT17LV256-10JU?
All AT17LV256-10JU units undergo pre-shipment inspection (PSI). If there is an issue with AT17LV256-10JU, 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 AT17LV256-10JU part is unused and in its original packaging.
Return procedure for AT17LV256-10JU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT17LV256-10JU 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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