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Microchip Technology AT28LV010-20JU-051
- Part No.:
- AT28LV010-20JU-051
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT28LV010-20JU-051.pdf
- Description:
- IC EEPROM 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT28LV010-20JU-051 from Atmel is a 1 Mbit (128K × 8) low-voltage paged parallel EEPROM with JEDEC-standard byte-wide pinout, 200 ns read access time, 10 ms maximum page write cycle time, and operation from a single 3.3 V ± 10% supply. It serves as nonvolatile program/data storage in industrial microcontroller systems requiring reliable, software-protected reprogramming without external high-voltage circuitry.
For engineers reviewing the AT28LV010-20JU-051 datasheet, AT28LV010-20JU-051 pinout, AT28LV010-20JU-051 application, or AT28LV010-20JU-051 equivalent, key selection considerations include its 128-byte page write capability, DATA polling and toggle-bit write completion detection, hardware/software data protection, CMOS standby current of 20 µA, and industrial temperature range (–40°C to +85°C).
Technical Context
The AT28LV010-20JU-051 implements a paged write architecture with internal 128-byte latches and an autonomous control timer, enabling up to 128 bytes to be loaded and written in a single internal programming operation. Address and data are latched on WE/CE edges, and write initiation requires a three-byte Software Data Protection (SDP) command sequence before any data load.
It supports two deterministic write completion detection methods: DATA polling on I/O7 (complement-to-data during write, true data upon completion) and toggle-bit behavior on I/O6. Read operations emulate SRAM timing with dual-line CE/OE control for bus contention avoidance, and all inputs meet standard TTL-compatible voltage thresholds (VIL = 0.8 V, VIH = 2.0 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - supports full byte-addressable nonvolatile storage without word alignment constraints. |
| Read Access Time | 200 ns max - enables direct replacement of fast SRAM in boot code or configuration storage where sub-250 ns latency is required. |
| Page Write Cycle Time | 10 ms max - defines worst-case delay before next memory access; critical for real-time firmware update scheduling. |
| Supply Voltage | 3.3 V ± 10% - compatible with modern 3.3 V logic domains; eliminates need for level shifters or dual-supply design. |
| Standby Current | 20 µA CMOS - enables ultra-low-power retention in battery-backed or energy-constrained industrial nodes. |
| Endurance | 10⁵ write/erase cycles - supports field-upgradable firmware with multi-year service life under typical update frequency. |
| Data Retention | 10 years at 85°C - ensures long-term reliability in unattended industrial equipment operating at elevated ambient temperatures. |
Pinout & Package
AT28LV010-20JU-051 is packaged in a 32-lead Plastic J-Leaded Chip Carrier (PLCC), JEDEC MS-016 compliant, with 1.27 mm pitch and body size 12.45 mm × 14.95 mm. Pin 1 identifier is a corner chamfer; leads are gull-wing J-bend with coplanarity ≤ 0.102 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A7–A16 define page boundaries for 128-byte writes. |
| I/O0–I/O7 | Bidirectional Data Bus | True 8-bit parallel interface; I/O7 used for DATA polling, I/O6 for toggle-bit detection during write cycles. |
| CE | Chip Enable | Active-low chip select; must remain deasserted ≥50 ns between reads to prevent data corruption. |
| OE | Output Enable | Active-low output control; used with CE for SRAM-like read timing and bus contention management. |
| WE | Write Enable | Active-low write strobe; latches address/data and initiates SDP validation or page programming sequence. |
| VCC | Power Supply | Single 3.3 V supply input; internal power-on delay (5 ms typ.) prevents spurious writes during power ramp. |
| GND | Ground | Reference return path for all I/O and core logic; decoupling recommended within 10 mm of VCC pin. |
| NC / DC | No Connect / Don't Connect | Unbonded pins; must be left floating per manufacturer guidance - no external connection or pull-up/down. |
Key Features
| Feature | Design Value |
|---|---|
| Software Data Protection (SDP) | Three-byte command sequence (AAh→55h→A0h) required before every write - prevents accidental overwrites during power transients or firmware bugs. |
| 128-byte Page Write | Internal latching allows burst loading of up to 128 bytes before autonomous programming - reduces host CPU overhead and bus occupancy vs. byte-by-byte writes. |
| DATA Polling & Toggle Bit | Dual, pin-specific status reporting (I/O7 complement, I/O6 toggle) enables interrupt-driven or polling-based write completion detection without fixed timeouts. |
| Hardware Write Inhibit | VCC power-on delay, noise filtering (<15 ns pulse rejection), and CE/OE/WE state monitoring block unintended writes - enhances system robustness in noisy environments. |
| Green Packaging | Pb/halide-free PLCC package - complies with RoHS Directive 2011/65/EU and supports lead-free reflow assembly processes. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing firmware images and calibration tables in programmable logic controllers deployed in factory automation environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing SRAM-compatible read interface and protected page-write capability for field updates. Use Value: 200 ns read access ensures minimal boot delay; 10⁵ endurance and 10-year data retention guarantee operational integrity across multi-year maintenance cycles. |
Use Scenario: Holding device-specific calibration coefficients, user preferences, and audit logs in portable diagnostic instruments requiring traceable, tamper-resistant storage. IC Role / Device Role / Timing Role: Secure configuration EEPROM with mandatory SDP and hardware write inhibit to prevent corruption during battery swaps or brownout events. Use Value: 20 µA standby current extends battery life; DATA polling enables deterministic update confirmation without watchdog timeout dependencies. |
| Telecom Base Station Control EEPROM | Automotive Body Control Module NVM |
Use Scenario: Storing MAC addresses, RF tuning parameters, and fail-safe defaults in outdoor telecom infrastructure operating continuously at –40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-grade parallel EEPROM interfaced directly to FPGA or ARM-based baseband processors via standard address/data bus. Use Value: JEDEC byte-wide pinout ensures drop-in compatibility with legacy designs; green packaging meets environmental compliance for global deployment. |
Use Scenario: Retaining seat/mirror position settings, error codes, and adaptive learning values in automotive body control units subject to repeated thermal cycling and vibration. IC Role / Device Role / Timing Role: Robust nonvolatile memory with hardware write protection and noise-filtered control inputs to withstand automotive electrical environments. Use Value: 15 mA active current and 20 µA standby support low-power sleep modes; 128-byte page writes accelerate parameter backup after user adjustments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar paged parallel EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT28C010-15PU | 5 V-only supply; 150 ns access; no SDP; 10⁴ endurance; DIP-32 package | Requires 5 V rail and lacks write protection - suitable only for legacy 5 V systems without safety-critical updates. | Select only if existing 5 V design prohibits voltage translation and update frequency is low. |
| MN63F1002BGP | 3.3 V supply; SPI interface; 5 ms write time; 10⁶ endurance; 8-pin SOIC | Serial interface reduces pin count but increases software overhead; higher endurance supports more frequent updates. | Prefer for new designs prioritizing board space and update frequency over parallel bus speed. |
Compared with AT28LV010-20JU-051, AT28C010-15PU trades voltage flexibility and security for legacy compatibility, while MN63F1002BGP sacrifices parallel read speed and SRAM-like timing for smaller footprint and greater endurance - making AT28LV010-20JU-051 optimal for industrial upgrades needing proven 3.3 V parallel EEPROM performance with robust write protection.
Availability
AT28LV010-20JU-051 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, and telecom base station control EEPROM requiring stable component supply, long-lifecycle assurance, and RoHS-compliant green packaging.
Supply support for AT28LV010-20JU-051 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 innovator specializing in microcontrollers, nonvolatile memory, and secure authentication ICs for industrial, automotive, and IoT applications.
The AT28LV010 product line delivers low-voltage, paged parallel EEPROMs designed for embedded systems requiring reliable, software-protected reprogrammability without external high-voltage generators or complex timing control.
FAQ
What is the correct power-up sequence for AT28LV010-20JU-051 to prevent inadvertent writes?
The AT28LV010-20JU-051 incorporates an internal VCC power-on delay: once VCC reaches 2.0 V (typical), the device automatically inhibits writes for 5 ms (typical) before enabling the write circuitry. No external reset sequencing is required - simply ensure VCC ramps monotonically to 3.3 V and hold CE, OE, and WE in inactive states (CE high, OE high, WE high) until after this delay. This built-in safeguard prevents spurious writes during power ramp and is intrinsic to every AT28LV010-20JU-051 unit.
Does AT28LV010-20JU-051 support true byte-write operations, or is page-write mandatory?
The AT28LV010-20JU-051 supports both single-byte and 1–128-byte page writes. While it features an internal 128-byte page register optimized for burst loading, the device allows writing any number of bytes from 1 to 128 within the same page (defined by A7–A16). Each byte must be loaded within 150 µs of the prior one (tBLC); exceeding this interval triggers immediate internal programming. So AT28LV010-20JU-051 offers flexible granularity - not strictly page-mandatory, but page-optimized.
How is write completion detected on AT28LV010-20JU-051 without using polling loops?
AT28LV010-20JU-051 provides two hardware-confirmed write completion signals: DATA polling on I/O7 (returns complement of last written byte during write, true data upon completion) and toggle-bit behavior on I/O6 (toggles between 0 and 1 during write, stabilizes when complete). Either signal can trigger a hardware interrupt or be sampled asynchronously - eliminating need for fixed-delay waits. Both methods are fully documented in the AT28LV010-20JU-051 datasheet AC characteristics and require no additional components.
What is the function of the NC and DC pins on AT28LV010-20JU-051, and how should they be handled on PCB layout?
On AT28LV010-20JU-051, NC (No Connect) and DC (Don't Connect) pins are internally unbonded and electrically inactive. Per Atmel's official guidance, these pins must be left floating - no connection to VCC, GND, or any other net. PCB layout must avoid solder mask openings or copper traces under these pads; routing or thermal reliefs are prohibited. Incorrect termination of NC/DC pins may cause mechanical stress or unintended coupling, compromising AT28LV010-20JU-051 reliability in industrial use.
Is AT28LV010-20JU-051 pin-compatible with standard 28-series EEPROMs like AT28C256?
No, AT28LV010-20JU-051 is not pin-compatible with AT28C256 or other 28C-series 5 V EEPROMs. Although both use 32-pin packages, AT28LV010-20JU-051 has a JEDEC-approved byte-wide pinout with A0–A16, I/O0–I/O7, and dedicated CE/OE/WE - whereas AT28C256 uses a different pin mapping (e.g., A15 shared with CE, no separate OE). Direct substitution would cause address/data bus conflicts. Always verify pin assignments against the AT28LV010-20JU-051 PLCC top-view diagram before board reuse.
AT28LV010-20JU-051 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 10ms
- Access Time:
- 200 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT28LV010-20JU-051 FAQ
1.How can I place an order for AT28LV010-20JU-051 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT28LV010-20JU-051 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 AT28LV010-20JU-051 reliable?
The price and inventory of AT28LV010-20JU-051 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT28LV010-20JU-051 is usually 5 days.
3.What payment methods are accepted for AT28LV010-20JU-051?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT28LV010-20JU-051 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT28LV010-20JU-051?
AT28LV010-20JU-051 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT28LV010-20JU-051 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 AT28LV010-20JU-051?
For technical support, including AT28LV010-20JU-051 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT28LV010-20JU-051 requirements.
6.How does Aetrix verify that AT28LV010-20JU-051 is sourced from the original manufacturer or authorized distributors?
All AT28LV010-20JU-051 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 AT28LV010-20JU-051 meets industry standards.
7.What is the process for return or replacement of AT28LV010-20JU-051?
All AT28LV010-20JU-051 units undergo pre-shipment inspection (PSI). If there is an issue with AT28LV010-20JU-051, 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 AT28LV010-20JU-051 part is unused and in its original packaging.
Return procedure for AT28LV010-20JU-051:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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