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Microchip Technology AT49BV001-12JI
- Part No.:
- AT49BV001-12JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV001-12JI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,859
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Product details
Overview
AT49BV001-12JI from Microchip Technology (formerly Atmel) is a 1 Mbit (128K × 8) single-supply 2.7–3.6V Flash memory IC used for nonvolatile code and data storage in embedded microcontroller systems. It features 70 ns read access time, sector-based erase architecture (16KB boot block + two 8KB parameter blocks + two main memory blocks), 10-second chip erase, and hardware data protection with RESET-controlled boot block override. It is commonly deployed in industrial control firmware storage and legacy BIOS/UEFI update modules.
For engineers reviewing the AT49BV001-12JI datasheet, AT49BV001-12JI pinout, AT49BV001-12JI application, or AT49BV001-12JI equivalent, this page delivers verified electrical specs, PLCC-32 pin mapping, boot-block lockout behavior, byte-programming timing (30 µs typical), and real-world use cases in firmware-resident systems requiring in-system reprogrammability without high-voltage programming.
Technical Context
The AT49BV001-12JI implements a standard parallel NOR Flash interface with CE/OE/WE control logic and supports EPROM-like read operation. Its internal command register executes software-controlled erase and program cycles via six-byte sequences (e.g., 5555h/2AAAh/80h for sector erase), eliminating need for external high-voltage generators.
It uses a segmented sector architecture: boot block (00000h–03FFFh) supports permanent lockout after enable; parameter blocks (04000h–07FFFh) allow independent field updates; main memory blocks (08000h–1FFFFh) provide bulk storage. DATA polling (I/O7 complement) and toggle-bit (I/O6) methods confirm operation completion without polling overhead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - directly replaces EPROMs in 8-bit bus systems. |
| Supply Voltage | 2.7 V to 3.6 V - enables direct integration into 3.3 V logic domains without level-shifting. |
| Read Access Time | 120 ns (tACC) - meets timing requirements for 8 MHz Z80, 8051, and early ARM7 bus interfaces. |
| Erase Cycle Time | 10 seconds (full chip) - deterministic duration allows predictable firmware update scheduling. |
| Byte Programming Time | 30 µs typical - enables rapid patching of small code/data segments without full-sector erasure. |
| End-of-Operation Detection | DATA polling (I/O7) and Toggle Bit (I/O6) - eliminates need for fixed delay timers in host firmware. |
| Write Endurance | 10,000 program/erase cycles - sufficient for field-upgradeable bootloaders and configuration tables. |
Pinout & Package
AT49BV001-12JI is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC-32) package with J-bend leads, suitable for socketed or surface-mount applications in industrial temperature range (−40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A0–A16 map directly to CPU address lines. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel data path; tri-stated when CE or OE is high to prevent bus contention. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access. |
| OE | Output Enable | Active-low output control; used with CE to manage bus sharing in multi-device systems. |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12 V input overrides boot block lockout. |
| VCC | Power Supply | +2.7 V to +3.6 V supply; powers core logic and memory array; decoupling required per JEDEC guidelines. |
| GND | Ground Reference | Signal and power ground reference; requires low-impedance connection to system ground plane. |
| DC / NC | No Connect / Don't Connect | Pins 1 (PLCC) and 9 (TSOP) are unconnected - must remain floating per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16 KB region (00000h–03FFFh) can be permanently write-protected to safeguard bootloader integrity. |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line interlock prevent accidental writes. |
| Sector Erase Flexibility | Independent erase of two 8 KB parameter blocks enables selective configuration updates without disturbing main firmware. |
| 12 V RESET Override | Applying 12 V ±0.5 V to RESET pin temporarily disables boot block lockout for emergency reprogramming. |
| CMOS Standby Current | 50 µA max - enables low-power retention in battery-backed systems during idle periods. |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded Bootloader Memory |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers operating in harsh environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; provides deterministic 120 ns read access for real-time instruction fetch. Use Value: Enables field firmware upgrades without removing the module; boot block lockout prevents corruption of critical startup routines during remote updates. |
Use Scenario: Holding boot code and initialization vectors for 8-bit microcontrollers (e.g., 8051, Z80) in medical instrumentation and test equipment. IC Role / Device Role / Timing Role: Primary boot memory mapped at reset vector address; supports EPROM-compatible read protocol with CE/OE/WE handshaking. Use Value: Eliminates need for external high-voltage programmers; 30 µs byte programming allows patching of small bug fixes without full image reload. |
| Automotive Diagnostic Module Code | Point-of-Sale Terminal Configuration |
Use Scenario: Storing diagnostic application code and vehicle-specific calibration tables in OBD-II scan tools and service equipment. IC Role / Device Role / Timing Role: Read-mostly code memory with occasional field updates; operates across −40°C to +85°C industrial temperature range. Use Value: Sector erase capability isolates calibration data updates from application code, reducing risk of bricking the device during partial reprogramming. |
Use Scenario: Retaining localized language strings, tax rate tables, and peripheral driver settings in retail POS terminals subject to regional regulatory changes. IC Role / Device Role / Timing Role: Parameter storage memory accessed via parallel bus; leverages two 8 KB parameter blocks for versioned configuration sets. Use Value: Enables over-the-air or USB-based configuration updates without firmware rebuild; DATA polling ensures reliable write confirmation under variable bus loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF010-70-4C-NHE | 1 Mbit, 3.3 V, 70 ns access, PLCC-32; lacks RESET-based boot block override and uses different command set. | No hardware boot lockout override; requires full sector erase for any boot code change. | Choose if strict Atmel command compatibility is not required and lower-cost sourcing is prioritized. |
| MX29LV001CTTI-12 | 1 Mbit, 3.0–3.6 V, 120 ns access, PLCC-32; includes CFI-compliant command set but no 12 V RESET override. | CFI support simplifies auto-detection in generic flash programmers; boot block protection is software-only. | Prefer for systems using standardized flash abstraction layers; verify compatibility with existing command sequence firmware. |
Compared with SST39VF010-70-4C-NHE and MX29LV001CTTI-12, the AT49BV001-12JI uniquely supports 12 V RESET-driven boot block reprogramming - a critical advantage for recovery in locked-down embedded systems where firmware corruption must be remediable without physical access.
Availability
AT49BV001-12JI is available at Aetrix Electronics and suitable for industrial control firmware storage, legacy embedded bootloader memory, automotive diagnostic module code, and point-of-sale terminal configuration requiring stable component supply and long-term obsolescence management.
Supply support for AT49BV001-12JI 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 legacy Flash product support, manufacturing, and documentation for industrial and automotive-grade memory solutions.
The AT49BV001-12JI belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for 3 V–only embedded systems needing in-system reprogrammability without high-voltage programming circuitry.
FAQ
What is the operating voltage range for the AT49BV001-12JI?
The AT49BV001-12JI operates from 2.7 V to 3.6 V DC. This single-supply range eliminates the need for separate 5 V programming voltage, enabling direct integration into 3.3 V logic systems. Operation below 2.7 V disables programming functions via internal VCC sense circuitry, preventing inadvertent writes during brown-out conditions.
Does the AT49BV001-12JI support boot block protection, and how is it enabled?
Yes, the AT49BV001-12JI includes a 16 KB boot block (00000h–03FFFh) with programmable lockout. It is enabled by executing a six-cycle command sequence (5555h/AAh → 2AAAh/55h → 5555h/80h → 5555h/AAh → 2AAAh/55h → 5555h/40h). Once activated, the boot block cannot be erased or programmed at ≤5.5 V - only 12 V applied to RESET overrides this protection.
What package type and pin count does the AT49BV001-12JI use?
The AT49BV001-12JI uses a 32-lead Plastic Leaded Chip Carrier (PLCC-32) package with J-bend leads. Pin 1 is designated as "Don't Connect" (DC) per the datasheet and must remain unconnected. The package supports industrial temperature operation (−40°C to +85°C) and is compatible with standard PLCC sockets and reflow soldering profiles.
How does the AT49BV001-12JI indicate completion of a byte programming cycle?
The AT49BV001-12JI supports two hardware methods: DATA polling (reading the programmed byte returns its complement on I/O7 until completion) and Toggle Bit (I/O6 toggles between 0 and 1 during operation and stops toggling upon completion). Both methods eliminate reliance on fixed timing delays and improve host firmware robustness across voltage/temperature variations.
Can the AT49BV001-12JI be used as a direct replacement for standard EPROMs like the 27C010?
Yes, the AT49BV001-12JI is pin-compatible and functionally compatible with 27C010 EPROMs in read mode (CE/OE/WE control, same address/data bus layout), but differs in programming methodology: it uses software command sequences instead of 12.5 V VPP. Host systems must implement the Atmel command protocol for erase/write - no hardware VPP circuitry is needed.
AT49BV001-12JI 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:
- 50µs
- Access Time:
- 120 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT49BV001-12JI FAQ
1.How can I place an order for AT49BV001-12JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001-12JI 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 AT49BV001-12JI reliable?
The price and inventory of AT49BV001-12JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001-12JI is usually 5 days.
3.What payment methods are accepted for AT49BV001-12JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001-12JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001-12JI?
AT49BV001-12JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001-12JI 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 AT49BV001-12JI?
For technical support, including AT49BV001-12JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001-12JI requirements.
6.How does Aetrix verify that AT49BV001-12JI is sourced from the original manufacturer or authorized distributors?
All AT49BV001-12JI 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 AT49BV001-12JI meets industry standards.
7.What is the process for return or replacement of AT49BV001-12JI?
All AT49BV001-12JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001-12JI, 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 AT49BV001-12JI part is unused and in its original packaging.
Return procedure for AT49BV001-12JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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