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Microchip Technology AT49BV001T-12JI
- Part No.:
- AT49BV001T-12JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV001T-12JI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,090
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Product details
Overview
AT49BV001T-12JI from Microchip Technology (formerly Atmel) is a 1 Mbit (128K × 8) single-supply 2.7–3.6 V in-system reprogrammable Flash memory IC with 120 ns read access time, sector-based architecture (16 KB boot block + two 8 KB parameter blocks + two main memory blocks), and hardware data protection. It is used for firmware storage and boot code retention in industrial embedded controllers requiring nonvolatile, field-upgradable memory.
For engineers reviewing the AT49BV001T-12JI datasheet, AT49BV001T-12JI pinout, AT49BV001T-12JI application, or AT49BV001T-12JI equivalent, this page delivers verified technical context, real-world use cases, validated alternatives, and supply-chain-ready availability details - all grounded in the official 1110C–FLASH–9/03 datasheet and Microchip's ordering documentation.
Technical Context
The AT49BV001T-12JI implements a command-register-based programming model using standard microprocessor timing, with WE/CE-controlled bus cycles for read, byte program, sector erase, chip erase, and boot lockout enable. Its internal logic handles erase timing autonomously without external clocks.
It features dual protection mechanisms: hardware-level VCC sensing (<1.8 V inhibits programming) and software-configurable boot block lockout (enabled via six-cycle command sequence), where the 16 KB boot sector resides at address 1C000H–1FFFFH and remains programmable only when RESET is driven to 12 V ± 0.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8 bits), organized as 128K words × 8 bits |
| Read Access Time | 120 ns - defines maximum clock-to-data delay in microcontroller interface timing budgets |
| Supply Voltage Range | 2.7 V to 3.6 V - enables direct battery-voltage operation without level-shifting in 3 V systems |
| Byte Programming Time | 30 µs typical - determines minimum write latency per byte during firmware updates |
| Erase Cycle Time | 10 seconds max - sets worst-case duration for full-chip or sector erase operations |
| End-of-Program Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delays in host firmware |
| Boot Block Size & Location | 16 KB at 1C000H–1FFFFH - reserved for secure boot loader code with optional permanent lockout |
Pinout & Package
AT49BV001T-12JI is supplied in a 32-lead Plastic J-leaded Chip Carrier (PLCC) package with standard JEDEC pinout and 1.27 mm pitch. Pin 1 is index corner; pin 9 is NC (no connect) per datasheet Note on page 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing (A0–A16 = 00000H–1FFFFH) |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface compatible with 8-bit microcontrollers and bus-oriented systems |
| 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; enables data output only when CE is also low |
| WE | Write Enable | Active-low write strobe; initiates command latching and programming/erase cycles |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12 V override enables boot block reprogramming |
| VCC | Power Supply | 2.7–3.6 V main supply; powers core logic and I/O buffers |
| GND | Ground Reference | System ground return path for all internal circuits and I/O drivers |
| DC / NC | No Connect | Pin 9 (PLCC) is unconnected - must remain floating or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Lockout | 16 KB boot block (1C000H–1FFFFH) supports permanent write protection after command-enable, ensuring bootloader integrity |
| Hardware Data Protection | VCC sense (<1.8 V disables programming), noise filtering (<15 ns pulses ignored), and control-line inhibition (OE low/CE high/WE high blocks writes) |
| Two End-of-Operation Detection Methods | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) allow flexible, deterministic host firmware synchronization |
| 12 V RESET Override | Applying 12 V ± 0.5 V to RESET pin bypasses boot block lockout during erase/program - critical for field recovery |
| Low-Power Operation | 50 µA CMOS standby current enables battery-backed retention in always-on industrial nodes |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Loader Retention |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; provides 120 ns read access for deterministic instruction fetch timing in real-time control loops. Use Value: Enables remote firmware updates without hardware replacement; boot block lockout prevents accidental corruption of safety-critical startup routines. |
Use Scenario: Securing boot code and calibration data in portable diagnostic equipment requiring FDA-compliant traceability and field-upgrade capability. IC Role / Device Role / Timing Role: Trusted boot memory with hardware-enforced write protection; 16 KB boot sector at 1C000H–1FFFFH isolates certified initialization code from user-modifiable application space. Use Value: 12 V RESET override allows authorized service technicians to recover corrupted boot sectors - meeting medical device servicing requirements. |
| Automotive Body Control Module | Telecom Remote Node Configuration |
Use Scenario: Holding vehicle-specific configuration tables and CAN protocol stacks in body control modules operating across –40°C to +85°C. IC Role / Device Role / Timing Role: Temperature-rated Flash memory with industrial-grade (-40°C to +85°C) operation; 2.7–3.6 V supply range matches automotive battery voltage fluctuations. Use Value: Sector erase capability permits selective update of lighting or door-lock logic without erasing entire firmware image - reducing reprogramming time and risk. |
Use Scenario: Storing network provisioning profiles and encryption keys in outdoor telecom repeaters exposed to humidity and thermal cycling. IC Role / Device Role / Timing Role: Field-programmable nonvolatile memory with DATA polling support; eliminates need for precise timing loops in resource-constrained MCU firmware. Use Value: 10,000 write/erase cycles ensure multi-year reliability under periodic configuration changes; low 50 µA standby current extends backup battery life. |
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 | 70 ns access, 3.0–3.6 V supply, same 1 Mbit density and PLCC-32 package | Lacks boot block lockout and 12 V RESET override; uses different command set | Select when faster read timing is required and boot protection is managed externally |
| MX29LV001CTTI-12 | 120 ns access, 3.0–3.6 V, 1 Mbit, PLCC-32; includes CFI-compatible command set | Supports Common Flash Interface but no 12 V override; boot sector at 00000H–03FFFH (not 1C000H–1FFFFH) | Choose for CFI-based toolchain compatibility and standardized JEDEC ID reading |
Compared with SST39VF010-70-4C-NHE and MX29LV001CTTI-12, the AT49BV001T-12JI uniquely combines industrial temperature rating, dedicated 16 KB boot block at upper address space (1C000H–1FFFFH), and hardware-enabled 12 V override - making it optimal for safety-critical, field-serviceable embedded systems.
Availability
AT49BV001T-12JI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot loader retention, and automotive body control module applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for AT49BV001T-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 full product support, datasheets, and legacy Flash memory roadmaps. The company specializes in microcontrollers, analog, and nonvolatile memory solutions for industrial, automotive, and IoT markets.
The AT49BV001T-12JI belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for reliable, low-voltage in-system reprogramming in resource-constrained embedded systems where power efficiency and firmware security are critical.
FAQ
What is the exact memory organization of the AT49BV001T-12JI?
The AT49BV001T-12JI contains 1 Mbit of Flash memory organized as 131,072 words × 8 bits (128K × 8). Its physical address space spans 00000H to 1FFFFH (128K addresses), with the 16 KB boot block located at 1C000H–1FFFFH, two 8 KB parameter blocks at 1A000H–1BFFFH and 18000H–19FFFH, and main memory blocks at 10000H–17FFFH and 00000H–0FFFFH.
Does the AT49BV001T-12JI support true 3 V-only operation without high-voltage programming?
Yes, the AT49BV001T-12JI operates with a single 2.7–3.6 V supply for both read and write functions. It requires no external 12 V programming voltage - all commands (including byte program, sector erase, and boot lockout) are executed using standard 3 V logic levels, except for the optional 12 V RESET override used solely to bypass boot block protection.
How is boot block protection enabled and verified on the AT49BV001T-12JI?
Boot block protection is enabled by issuing a six-cycle command sequence (5555H/AAH → 2AAAH/55H → 5555H/80H → 5555H/AAH → 2AAAH/55H → 5555H/40H). Verification is performed in Software Product Identification mode: reading address 1C002H returns I/O0 = high if lockout is active, or low if still programmable - confirming the protection state before field deployment.
What package and temperature grade does the AT49BV001T-12JI use?
The AT49BV001T-12JI uses a 32-lead Plastic J-leaded Chip Carrier (PLCC) package (package code 32J) and is rated for industrial temperature operation from –40°C to +85°C. The "-12" suffix denotes 120 ns maximum read access time, and "JI" indicates industrial-grade PLCC packaging.
Can the AT49BV001T-12JI be used as a direct replacement for the AT49BV001-12JI?
No - the AT49BV001T-12JI and AT49BV001-12JI differ in boot block location and sector mapping. The "T" variant places the 16 KB boot block at 1C000H–1FFFFH, while the non-T variant locates it at 00000H–03FFFH. This affects address decoding, erase command targeting, and software compatibility; they are not pin- or functionally interchangeable without firmware revision.
AT49BV001T-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)
AT49BV001T-12JI FAQ
1.How can I place an order for AT49BV001T-12JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001T-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 AT49BV001T-12JI reliable?
The price and inventory of AT49BV001T-12JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001T-12JI is usually 5 days.
3.What payment methods are accepted for AT49BV001T-12JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001T-12JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001T-12JI?
AT49BV001T-12JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001T-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 AT49BV001T-12JI?
For technical support, including AT49BV001T-12JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001T-12JI requirements.
6.How does Aetrix verify that AT49BV001T-12JI is sourced from the original manufacturer or authorized distributors?
All AT49BV001T-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 AT49BV001T-12JI meets industry standards.
7.What is the process for return or replacement of AT49BV001T-12JI?
All AT49BV001T-12JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001T-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 AT49BV001T-12JI part is unused and in its original packaging.
Return procedure for AT49BV001T-12JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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