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Microchip Technology AT29LV010A-25JI
- Part No.:
- AT29LV010A-25JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT29LV010A-25JI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT29LV010A-25JI from Atmel is a 1-Mbit (128K × 8) 3.3V-only Flash memory IC organized for byte-wide parallel access, featuring 120 ns read access time, sector-based reprogramming with 1024 × 128-byte sectors, and dual 8K-byte boot blocks with independent programming lockout - used in embedded system firmware storage and BIOS code retention.
For engineers reviewing the AT29LV010A-25JI datasheet, AT29LV010A-25JI pinout, AT29LV010A-25JI application, or AT29LV010A-25JI equivalent, key selection criteria include 3.3V-only operation, software-controlled sector erase/program, DATA polling and toggle-bit end-of-write detection, CMOS/TTL-compatible I/O, and industrial temperature support (–40°C to +85°C).
Technical Context
The AT29LV010A-25JI implements a sector-erase architecture with internal address/data latching for 128-byte loads, automatic erase-before-program, and internal timing control - eliminating external high-voltage programming circuitry. It supports hardware- and software-based data protection, including VCC-sense inhibition and 3-byte unlock sequences.
Its dual boot blocks (first and last 8K bytes) enable secure system startup code storage with independent lockout activation via seven-command algorithm. End-of-program detection is supported via DATA polling on I/O7 and toggle-bit behavior on I/O6, both usable at any point during write cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), enabling full BIOS or bootloader storage in single-package footprint |
| Read Access Time | 250 ns max (tACC), compatible with 4 MHz microcontroller bus timing without wait states |
| Supply Voltage | 3.3 V ± 0.3 V only - no 5 V tolerance; eliminates level-shifting in modern low-voltage systems |
| Active Current | 15 mA typical - enables low-power embedded operation during firmware reads |
| Standby Current | 40 µA (CMOS), reducing quiescent power in always-on controller applications |
| Endurance | >10,000 program/erase cycles per sector - sufficient for field firmware updates over product lifetime |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded control and networking equipment |
Pinout & Package
AT29LV010A-25JI is packaged in a 32-lead PLCC (Plastic Leaded Chip Carrier), JEDEC MS-016 compliant, with 1.27 mm pitch and 12.45 mm × 12.45 mm body size - suitable for through-hole or surface-mount reflow assembly in space-constrained industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-byte addressing; A7–A16 select sector, A0–A6 select byte within sector |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface; supports byte load and DATA polling on I/O7, toggle-bit monitoring on I/O6 |
| CE | Chip Enable | Active-low chip select - must be low for read/write; high-Z output when asserted high |
| OE | Output Enable | Active-low output control - enables data output during read; disables bus drivers when high |
| WE | Write Enable | Active-low write strobe - initiates byte load and triggers internal program cycle after unlock sequence |
| VCC | Power Supply | 3.3 V ± 0.3 V supply; internal VCC sense prevents programming if below 1.8 V |
| GND | Ground Reference | Signal and power ground reference for all I/O and internal logic |
| NC | No Connect | Two unconnected pins (PLCC pins 13 and 31); must remain floating - no routing or termination required |
Key Features
| Feature | Design Value |
|---|---|
| Software Data Protection | Three-byte unlock sequence (AAh/55h/A0h) required before each sector program - prevents accidental writes during power transients or noise events |
| Dual Boot Block Lockout | Independent 8K-byte lockout for first and last memory segments - secures boot code against overwrite while allowing runtime update of application firmware |
| Internal Sector Erase/Program | Automatic erase-before-write per 128-byte sector - eliminates need for separate erase command and simplifies host firmware logic |
| DATA Polling & Toggle Bit | I/O7 complement-polling and I/O6 toggling provide real-time, non-intrusive write completion detection - avoids fixed delays and improves system responsiveness |
| CMOS/TTL-Compatible I/O | Input thresholds (VIL = 0.6 V, VIH = 2.0 V) and output drive (VOH = 2.4 V @ –100 µA) ensure interoperability with legacy 5 V logic and modern 3.3 V controllers |
Applications
| Industrial PLC Firmware Storage | Legacy PC BIOS Retention |
|---|---|
Use Scenario: Storing configuration and control logic in programmable logic controllers operating in factory-floor environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Nonvolatile firmware storage with sector-level update capability and boot block lockout to preserve critical startup routines. Use Value: Enables field-upgradable ladder logic without replacing hardware; 40 µA standby current extends battery-backed operation during power loss. | Use Scenario: Holding BIOS code in older desktop motherboards and embedded x86 platforms requiring direct parallel Flash interface and 3.3 V compatibility. IC Role / Device Role / Timing Role: Primary boot ROM replacement for EPROM-based designs, supporting in-system reprogramming via standard ISA/LPC bus signals. Use Value: Eliminates UV-erasure and socket programming; 250 ns access time meets legacy chipset timing without wait-state insertion. |
| Network Router Bootloader | Medical Device Configuration Memory |
Use Scenario: Storing secure bootloader and recovery image in enterprise-grade routers where firmware integrity and remote update capability are essential. IC Role / Device Role / Timing Role: Dual-boot-block Flash providing protected primary boot code and updatable secondary image storage with hardware-enforced lockout. Use Value: Prevents corruption of core boot logic during OTA updates; DATA polling allows precise synchronization of firmware validation routines. | Use Scenario: Retaining calibration data, device serial numbers, and safety-critical configuration parameters in Class II medical instruments with long service life. IC Role / Device Role / Timing Role: High-reliability nonvolatile memory with >10,000 endurance cycles and industrial temperature qualification for use in sterilizable enclosures. Use Value: Ensures traceability and regulatory compliance across 10+ years of clinical deployment; CMOS standby current minimizes battery drain in portable diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT29BV010A-25JI | Successor device with identical pinout, same 1 Mbit density and 3.3 V operation, but improved reliability and extended lifecycle support | Same boot block structure and software command set - drop-in replacement for new designs requiring long-term availability | Select AT29BV010A-25JI for new designs; AT29LV010A-25JI remains viable for legacy repair and continuity sourcing |
| SST39VF010-25-4C-NHE | 3.3 V Flash with 250 ns access, 1024 × 128-byte sectors, and similar DATA polling - but uses different unlock sequence (5555h/2AAAh/AAh) | Requires firmware adaptation for command protocol; lacks dedicated boot block lockout feature | Use only when migrating from Atmel platform and redesigning host driver logic to match SST's command set |
Compared with AT29LV010A-25JI, the AT29BV010A-25JI offers enhanced endurance and manufacturer support continuity, while the SST39VF010-25-4C-NHE provides functional equivalence with different software protocol - neither is pin-compatible without firmware revision, and only AT29BV010A-25JI guarantees identical timing, lockout behavior, and long-term supply.
Availability
AT29LV010A-25JI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy PC BIOS retention, and network router bootloader applications requiring stable component supply and long-lifecycle support.
Supply support for AT29LV010A-25JI 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 known for Flash memory, microcontrollers, and secure authentication ICs - delivering robust, industry-qualified nonvolatile solutions since 1984.
The AT29LV010A belongs to Atmel's legacy parallel Flash memory product line, designed specifically for embedded systems requiring in-system reprogrammability, industrial temperature resilience, and boot-code security without external high-voltage circuitry.
FAQ
What is the maximum read access time specified for the AT29LV010A-25JI?
The AT29LV010A-25JI has a maximum read access time (tACC) of 250 ns, measured from address valid to valid data output under industrial temperature conditions (–40°C to +85°C) and 3.3 V supply. This value corresponds to the "-25" speed grade and ensures compatibility with microcontrollers operating at up to 4 MHz without wait-state insertion. The parameter is fully characterized per datasheet Section 9 and applies to both PLCC and TSOP packages.
Does the AT29LV010A-25JI support 5 V logic interfaces?
No, the AT29LV010A-25JI is a 3.3 V-only device and does not support 5 V tolerant inputs or outputs. Its input voltage thresholds (VIL = 0.6 V, VIH = 2.0 V) and output drive levels (VOH = 2.4 V at –100 µA) are optimized for 3.3 V CMOS/TTL systems. Driving address or control lines above VCC + 0.6 V risks damage, and interfacing directly with 5 V buses requires level-shifting circuitry per datasheet Section 4.4.
How many sectors does the AT29LV010A-25JI have, and what is the sector size?
The AT29LV010A-25JI contains 1024 uniform sectors, each 128 bytes in size, totaling 131,072 bytes (1 Mbit). Sector addressing is handled internally using A7–A16, while A0–A6 select the byte within the sector. This architecture enables granular firmware updates - for example, modifying a single driver module without erasing the entire memory - and is fundamental to its software data protection mechanism.
Can the boot blocks of the AT29LV010A-25JI be unlocked after programming lockout is enabled?
No, once the boot block programming lockout is activated on either the lower (0x00000–0x01FFF) or upper (0x1E000–0x1FFFF) 8K-byte segment, it cannot be reversed. The lockout is implemented via permanent fuse-like behavior in the silicon and persists across power cycles. Datasheet Section 4.9 explicitly states that locked boot blocks cannot be erased or programmed, and chip erase is disabled if either block is locked - making pre-deployment verification essential.
What is the purpose of the DATA polling feature in the AT29LV010A-25JI?
DATA polling in the AT29LV010A-25JI allows host firmware to detect program completion without fixed timing delays: reading the last loaded byte returns the complement of the data on I/O7 until programming finishes, then true data appears. This real-time status feedback enables deterministic, interrupt-driven write routines and eliminates guesswork in timing-critical embedded systems - a key advantage over fixed-delay polling methods.
AT29LV010A-25JI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 20ms
- Access Time:
- 250 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)
AT29LV010A-25JI FAQ
1.How can I place an order for AT29LV010A-25JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29LV010A-25JI 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 AT29LV010A-25JI reliable?
The price and inventory of AT29LV010A-25JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29LV010A-25JI is usually 5 days.
3.What payment methods are accepted for AT29LV010A-25JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29LV010A-25JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29LV010A-25JI?
AT29LV010A-25JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29LV010A-25JI 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 AT29LV010A-25JI?
For technical support, including AT29LV010A-25JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29LV010A-25JI requirements.
6.How does Aetrix verify that AT29LV010A-25JI is sourced from the original manufacturer or authorized distributors?
All AT29LV010A-25JI 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 AT29LV010A-25JI meets industry standards.
7.What is the process for return or replacement of AT29LV010A-25JI?
All AT29LV010A-25JI units undergo pre-shipment inspection (PSI). If there is an issue with AT29LV010A-25JI, 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 AT29LV010A-25JI part is unused and in its original packaging.
Return procedure for AT29LV010A-25JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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