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Microchip Technology AT28LV010-20JU-T
- Part No.:
- AT28LV010-20JU-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT28LV010-20JU-T.pdf
- Description:
- IC EEPROM 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,055
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Product details
Overview
AT28LV010-20JU-T from Atmel is a 1 Mbit (128K × 8) low-voltage paged parallel EEPROM with JEDEC-standard byte-wide pinout, 3.3 V ±10% supply, 200 ns read access time, and 10 ms maximum page write cycle time. It operates across the industrial temperature range (–40°C to +85°C) and supports automatic 1–128-byte page writes with DATA polling and toggle-bit write completion detection for embedded microcontroller systems requiring nonvolatile storage with minimal external logic.
For engineers reviewing the AT28LV010-20JU-T datasheet, AT28LV010-20JU-T pinout, AT28LV010-20JU-T application, or AT28LV010-20JU-T equivalent, key selection considerations include its 3.3 V-only operation, hardware/software data protection, CMOS standby current of 20 µA, 10⁵ endurance cycles, and compatibility with static RAM-like interface timing in read mode.
Technical Context
The AT28LV010-20JU-T implements a paged parallel EEPROM architecture with an internal 128-byte page register that latches address and data on falling WE/CE edges, enabling bus release during internal programming. Its software data protection (SDP) requires a mandatory three-byte command sequence (0x5555/0x2AAA/0x5555) before any write, and all writes are subject to byte-load-cycle timing (≤150 µs between bytes).
Write completion is verified via dual methods: DATA polling on I/O7 (complement → true data transition) and toggle-bit behavior on I/O6. The device uses advanced CMOS nonvolatile technology with internal error correction, delivering 10-year data retention and 10⁵ write/erase cycles while maintaining JEDEC-compliant pinout for drop-in replacement of legacy 5 V EEPROMs in upgraded 3.3 V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), enabling storage of firmware boot code or configuration data for mid-complexity microcontrollers. |
| Read Access Time | 200 ns max - matches SRAM-like timing for zero-wait-state CPU reads without glue logic. |
| Page Write Cycle | 10 ms max for 1–128 bytes - reduces system latency vs. byte-write EEPROMs by >90% for block updates. |
| Supply Voltage | 3.3 V ±10% - eliminates level-shifting in modern 3.3 V controller designs and simplifies power rail architecture. |
| Standby Current | 20 µA CMOS - enables ultra-low-power operation in battery-backed or energy-constrained applications. |
| Endurance | 10⁵ write/erase cycles - supports field-updatable parameters in industrial controllers with multi-year service life. |
| Data Retention | 10 years at 85°C - ensures long-term reliability in automotive under-hood or industrial control cabinet environments. |
Pinout & Package
AT28LV010-20JU-T is packaged in a 32-lead Plastic J-Leaded Chip Carrier (PLCC), JEDEC MS-016 compliant, with 1.27 mm pitch and 12.32 mm × 14.86 mm body dimensions. Pin 1 identifier is a corner chamfer; leads are gull-wing with 0.102 mm max coplanarity.
| 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 | 8-bit parallel data path; I/O7 used for DATA polling, I/O6 for toggle-bit status during write operations. |
| 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 to manage bus contention and enable high-impedance tri-state during writes. |
| WE | Write Enable | Active-low write strobe; falling edge latches address/data; rising edge initiates internal programming timer. |
| VCC | Power Supply | 3.3 V ±10% input; includes internal 5 ms power-on delay to prevent spurious writes during power ramp. |
| GND | Ground Reference | Signal and power return; decoupling capacitor placement near Pin 16 critical for noise immunity during page writes. |
| NC / DC | No Connect / Don't Connect | Unbonded pins; must be left floating per Atmel design - no tie-high/tie-low or routing required. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Page Write | Internal 128-byte latch frees address/data bus after initial load, enabling concurrent CPU operations during 10 ms internal programming. |
| DATA Polling & Toggle Bit | Dual asynchronous write-complete detection on I/O7 and I/O6 eliminates need for fixed delays or external timers in host firmware. |
| Software Data Protection (SDP) | Mandatory 3-byte unlock sequence prevents accidental writes during power transitions or noise events - enabled at all times. |
| Hardware Write Inhibit | VCC power-on delay, OE/CE/WE logic-level inhibition, and 15 ns noise filtering provide robust immunity to system-level glitches. |
| Green Packaging | Pb/halide-free PLCC package meets RoHS Directive 2011/65/EU and JEDEC J-STD-609A Class 1 moisture sensitivity. |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping tables, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Nonvolatile configuration memory interfaced directly to 8-bit/16-bit microcontrollers via parallel bus; replaces battery-backed SRAM with zero maintenance. Use Value: 10⁵ endurance and 10-year retention ensure reliable parameter persistence over 15+ year equipment lifecycles without recalibration or backup power. | Use Scenario: Holding sensor calibration coefficients, patient history logs, and safety-critical firmware patches in portable diagnostic instruments operating on rechargeable batteries. IC Role / Device Role / Timing Role: Low-power configuration store accessed during boot and runtime; leverages 20 µA standby current to extend battery life between charges. Use Value: 3.3 V-only operation eliminates level shifters, reducing BOM count and PCB area; page write cuts firmware update time by 95% vs. byte-wise EEPROMs. |
| Automotive Body Control Module (BCM) | Networking Equipment Bootloader Image |
Use Scenario: Storing seat/mirror position presets, lighting profiles, and door lock configurations in automotive BCMs operating across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Industrial-temperature EEPROM providing EEPROM-compatible interface to 8051 or ARM7-based BCM SoCs with SRAM-like read timing. Use Value: JEDEC byte-wide pinout allows direct replacement of legacy 28C256 parts; green packaging satisfies automotive ELV directive requirements. | Use Scenario: Hosting bootloader code and hardware initialization vectors in enterprise switches/routers where field firmware upgrades occur infrequently but require absolute reliability. IC Role / Device Role / Timing Role: Read-only boot memory during cold start; write-enabled only during controlled upgrade sequences using SDP command protocol. Use Value: Hardware write inhibit and noise-filtered WE/CE inputs prevent corruption during ESD events or power transients in data center environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar paged parallel EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT28C256-15PU | 5 V operation, 150 ns access, 256 Kbit density, no SDP, no page write - byte-only writes only. | Requires level shifting in 3.3 V systems; unsuitable for low-power or high-cycle-count applications. | Select only if legacy 5 V design constraints prohibit voltage translation and write speed is not critical. |
| ST M28W640ECB90N6E | 3.3 V, 64 Mbit Flash, 90 ns read, no byte-write capability - sector erase required before reprogramming. | Higher density but lacks true EEPROM semantics; requires complex wear leveling and erase management firmware. | Choose when large firmware image storage is needed and host MCU can support Flash-specific command sets and erase latency. |
Compared with AT28C256-15PU and ST M28W640ECB90N6E, the AT28LV010-20JU-T uniquely delivers 3.3 V paged writes with SRAM-like read timing and built-in data protection - making it optimal for mid-density, low-power, field-upgradable embedded systems where simplicity and reliability outweigh raw capacity or speed.
Availability
AT28LV010-20JU-T is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics equipment, automotive body control modules, and networking bootloaders requiring stable component supply with guaranteed long-term availability.
Supply support for AT28LV010-20JU-T 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 fabless semiconductor company specializing in microcontrollers, nonvolatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT28LV010 product line was designed to bridge the gap between legacy 5 V EEPROMs and modern 3.3 V systems - delivering paged write performance, robust data integrity features, and JEDEC pin compatibility for seamless migration.
FAQ
What is the correct power-up sequence for reliable operation of the AT28LV010-20JU-T?
The AT28LV010-20JU-T incorporates an internal 5 ms power-on delay after VCC reaches 2.0 V, preventing spurious writes during supply ramp. No external reset sequencing is required - simply ensure VCC stabilizes within 3.3 V ±10% before asserting CE or initiating commands. This built-in delay makes the AT28LV010-20JU-T tolerant of uncontrolled power-up conditions common in industrial power supplies.
Does the AT28LV010-20JU-T support true byte-write operations, or is page write mandatory?
The AT28LV010-20JU-T supports both single-byte and 1–128-byte page writes. While page write is optional, all writes - including single-byte - must be preceded by the full 3-byte Software Data Protection (SDP) command sequence (0x5555/0x2AAA/0x5555). The device does not permit unprotected writes under any condition, ensuring data integrity even during brown-out events.
How is write completion detected on the AT28LV010-20JU-T without using polling delays?
The AT28LV010-20JU-T provides two hardware-verified methods: DATA polling on I/O7 (complement → true data transition) and toggle-bit behavior on I/O6 (repeated reads cause I/O6 to alternate until write completes). Both methods are asynchronous and deterministic - no fixed timing loops or worst-case delays are needed, enabling efficient host firmware implementation for the AT28LV010-20JU-T.
What is the function of the NC and DC pins on the AT28LV010-20JU-T PLCC package?
On the AT28LV010-20JU-T's 32-lead PLCC package, NC (No Connect) and DC (Don't Connect) pins are unconnected die bond pads. They must remain electrically floating - no pull-up, pull-down, or routing is permitted. Atmel explicitly states these pins serve no functional purpose and connecting them may compromise device reliability or violate JEDEC MS-016 mechanical compliance for the AT28LV010-20JU-T.
Can the AT28LV010-20JU-T be used as a direct replacement for the AT28C256 in existing 5 V designs?
No - the AT28LV010-20JU-T is a 3.3 V-only device and is not 5 V tolerant. Its absolute maximum input voltage is 6.25 V, but sustained 5 V signaling on address/data/control lines risks violating VIH/VIL thresholds and may cause unreliable operation. For migration from AT28C256, level translation or redesign to 3.3 V logic is required; the AT28LV010-20JU-T offers pinout compatibility but not voltage compatibility.
AT28LV010-20JU-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- 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 (11.43x13.97)
AT28LV010-20JU-T FAQ
1.How can I place an order for AT28LV010-20JU-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT28LV010-20JU-T 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-T reliable?
The price and inventory of AT28LV010-20JU-T 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-T is usually 5 days.
3.What payment methods are accepted for AT28LV010-20JU-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT28LV010-20JU-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT28LV010-20JU-T?
AT28LV010-20JU-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT28LV010-20JU-T 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-T?
For technical support, including AT28LV010-20JU-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT28LV010-20JU-T requirements.
6.How does Aetrix verify that AT28LV010-20JU-T is sourced from the original manufacturer or authorized distributors?
All AT28LV010-20JU-T 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-T meets industry standards.
7.What is the process for return or replacement of AT28LV010-20JU-T?
All AT28LV010-20JU-T units undergo pre-shipment inspection (PSI). If there is an issue with AT28LV010-20JU-T, 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-T part is unused and in its original packaging.
Return procedure for AT28LV010-20JU-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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