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Microchip Technology AT49BV001NT-12JI
- Part No.:
- AT49BV001NT-12JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV001NT-12JI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49BV001NT-12JI from Microchip Technology (formerly Atmel) is a 1 Mbit (128K × 8) single-supply 3V-only Flash memory IC used for nonvolatile program/data storage in embedded microcontroller systems. It features 70 ns read access time, 10-second chip erase, byte-programmable architecture with sector protection, and operates across -40°C to +85°C industrial temperature range.
For engineers reviewing the AT49BV001NT-12JI datasheet, AT49BV001NT-12JI pinout, AT49BV001NT-12JI application, or AT49BV001NT-12JI equivalent, this page delivers verified technical context, real-world use cases, pin-level design meaning, and validated alternative options for boot-critical firmware storage in resource-constrained industrial controllers.
Technical Context
This device implements a standard parallel NOR Flash interface with CE/OE/WE control logic, supporting EPROM-like read timing and command-based write/erase operations. Its internal architecture includes a 16 KB boot block (address 1C000H–1FFFFH), two 8 KB parameter blocks, and two main memory blocks (32 KB and 64 KB), all accessible via A0–A16 address lines and I/O0–I/O7 data bus.
It uses hardware-based data protection including VCC sense (<1.8 V inhibits programming), noise filtering on WE/CE (<15 ns pulses ignored), and dual-line control (CE+OE low for read) to prevent bus contention. Programming lockout for the boot block is enabled via six-cycle command sequence and can be overridden only by applying 12 V to RESET during operation - a feature present in the T-suffix variant but not in N-suffix parts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8 bits), organized as 128K words × 8 bits - sufficient for bootloader code and configuration data in 8-bit/16-bit MCU systems. |
| Read Access Time | 120 ns max (tACC) - compatible with 8 MHz system buses without wait states in most industrial microcontrollers. |
| Supply Voltage | 2.7 V to 3.6 V - supports battery-backed or low-voltage regulated power rails common in portable and sensor-edge devices. |
| Erase Cycle Time | 10 seconds typical for full chip erase - enables field firmware updates with predictable timeout handling in host firmware. |
| Byte Programming Time | 30 µs typical (tBP) - allows rapid patching of small configuration fields without blocking system operation for extended periods. |
| End-of-Operation Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delay loops and improves reliability under varying temperature/voltage conditions. |
| Write Endurance | 10,000 program/erase cycles - meets long-term field deployment requirements for infrequently updated firmware storage. |
| Standby Current | 50 µA CMOS standby (ISB1) - critical for low-power sleep modes in battery-operated instrumentation and remote sensors. |
Pinout & Package
AT49BV001NT-12JI is supplied in a 32-lead PLCC (Plastic Leaded Chip Carrier) package with J-leads, pin-compatible with industry-standard 32-pin Flash memory footprints. The package is lead-free and RoHS-compliant per manufacturer documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 required for accessing upper memory regions including boot block (1C000H–1FFFFH). |
| I/O0–I/O7 | Data Inputs/Outputs | 8-bit bidirectional data bus; supports byte-wide reads/writes and must be externally terminated or buffered for signal integrity on >5 cm traces. |
| CE | Chip Enable | Active-low chip select; when high, places outputs in high-impedance state - essential for multi-device bus sharing and power gating. |
| OE | Output Enable | Active-low output control; used with CE to manage bus contention during read cycles - enables flexible timing alignment with MCU wait-state generators. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command cycle - defines timing window for valid command entry and prevents spurious writes. |
| RESET* | Reset Input | Active-low reset; halts ongoing program/erase and forces high-Z outputs; 12 V override capability enables boot block reprogramming even after lockout is enabled (T-suffix only). |
| VCC | Power Supply | 2.7–3.6 V supply input; requires local 100 nF ceramic decoupling within 1 cm of pin to maintain stable voltage during fast write pulses. |
| GND | Ground Reference | Signal and power ground reference; must be connected to low-impedance PCB plane to minimize noise coupling into sensitive command decode logic. |
| NC / DC | No Connect / Don't Connect | Pin 1 (PLCC) is NC - must remain unconnected; floating or tied to GND/VCC causes undefined behavior and violates device specification. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16 KB protected region (1C000H–1FFFFH) with irreversible lockout via command sequence - ensures bootloader integrity against accidental overwrites in deployed systems. |
| Hardware Data Protection | VCC sense, noise filtering, and CE/OE/WE interlock prevent unintended writes during power transients or EMI events - reduces field failure risk without software overhead. |
| Sector-Erasable Architecture | Independent erasure of two 8 KB parameter blocks and two main memory blocks (32 KB/64 KB) - enables modular firmware updates without full chip erase delays. |
| DATA Polling & Toggle Bit | Dual asynchronous end-of-operation detection methods eliminate fixed timing delays and improve robustness across voltage/temperature corners. |
| Industrial Temperature Range | -40°C to +85°C operation - qualified for use in motor drives, PLC modules, and outdoor metering equipment without derating. |
| Low-Power Standby Mode | 50 µA CMOS standby current - extends battery life in always-on edge nodes where Flash remains powered but inactive for >99% of runtime. |
Applications
| Industrial PLC Firmware Storage | Embedded Bootloader Memory |
|---|---|
|
Use Scenario: Storing firmware images and configuration tables in programmable logic controllers operating in factory-floor environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Nonvolatile program memory holding boot code, ladder logic interpreter, and I/O mapping tables; accessed via 8-bit parallel bus during cold start and firmware update. Use Value: Sector-erasable architecture allows updating logic programs without erasing boot code; 120 ns read time supports deterministic scan-cycle timing in real-time control loops. |
Use Scenario: Providing secure, field-upgradable boot code for 8-bit microcontrollers in medical diagnostic instruments requiring regulatory-compliant firmware traceability. IC Role / Device Role / Timing Role: Primary boot memory mapped at reset vector; boot block lockout prevents corruption of secure startup routines during field updates of application firmware. Use Value: 12 V RESET override enables recovery from corrupted boot sectors; 10,000-cycle endurance supports lifetime field updates without hardware replacement. |
| Smart Meter Parameter Storage | Automotive Body Control Module EEPROM Replacement |
|
Use Scenario: Retaining tariff schedules, calibration coefficients, and tamper logs in ANSI C12.20-compliant electricity meters exposed to outdoor thermal cycling. IC Role / Device Role / Timing Role: Parameter block storage (two 8 KB sections) for field-configurable settings; accessed via SPI-to-parallel bridge or direct MCU bus interface during meter initialization. Use Value: Independent parameter block erasure avoids full chip erase during tariff updates; 50 µA standby current minimizes battery drain in backup-powered meters. |
Use Scenario: Replacing legacy EEPROM in automotive body control units for storing seat position profiles, mirror presets, and lighting configurations. IC Role / Device Role / Timing Role: Nonvolatile configuration memory interfaced directly to 8-bit MCU data bus; programmed during vehicle assembly and updated via dealer diagnostic tools. Use Value: 3V-only operation matches modern automotive domain controller power domains; hardware write protection prevents corruption during ignition cycling or load dump events. |
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, 70 ns access, 3.0–3.6 V supply, same PLCC-32 package; lacks boot block lockout and 12 V RESET override. | Supports basic firmware storage but cannot enforce bootloader write protection - unsuitable for safety-critical boot paths requiring certified integrity. | Select when cost sensitivity outweighs boot security requirements and full chip erase is acceptable for parameter updates. |
| MX29LV010TC-70G | 1 Mbit, 70 ns access, 3.0–3.6 V supply, PLCC-32; includes boot block protection but no 12 V override - lockout is permanent once enabled. | Provides immutable boot protection ideal for certified firmware, but eliminates field recovery capability if boot sector becomes corrupted. | Prefer for automotive ASIL-B systems where boot integrity is mandatory and recovery is handled via external programming tools. |
Compared with SST39VF010-70-4C-NHE and MX29LV010TC-70G, AT49BV001NT-12JI uniquely balances field-upgradability with boot security via its 12 V RESET override - enabling both certified bootloader protection and safe recovery in deployed industrial assets.
Availability
AT49BV001NT-12JI is available at Aetrix Electronics and suitable for industrial automation, smart metering, and automotive body electronics requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for AT49BV001NT-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 support for legacy Atmel Flash memory products, including datasheets, errata, and cross-reference tools.
The AT49BV/LV series was designed specifically for in-system reprogrammable firmware and configuration storage in cost-sensitive, space-constrained industrial and automotive control systems using parallel interfaces.
FAQ
What is the boot block address range for AT49BV001NT-12JI?
The boot block for AT49BV001NT-12JI occupies addresses 1C000H to 1FFFFH (16 KB). This differs from non-T variants (e.g., AT49BV001N), which locate the boot block at 00000H–03FFFH. The T-suffix denotes top-boot architecture, placing protected code at the highest memory address - a key requirement for many 8051 and PIC microcontroller reset vector mappings. AT49BV001NT-12JI retains this layout regardless of speed grade or temperature rating.
Does AT49BV001NT-12JI support 12 V RESET override for boot block reprogramming?
Yes, AT49BV001NT-12JI supports 12 V ±0.5 V applied to the RESET pin during chip erase, sector erase, or byte programming to temporarily disable boot block lockout. This feature is explicitly documented for the T-suffix family and confirmed in the "Boot Block Programming Lockout Override" section of the datasheet. It is not available on N-suffix variants like AT49BV001N-12JI.
What package type is used for AT49BV001NT-12JI?
AT49BV001NT-12JI uses a 32-lead Plastic Leaded Chip Carrier (PLCC) package, designated as 32J in Atmel/Microchip ordering codes. This surface-mount package features J-shaped leads, is RoHS-compliant, and has a standard footprint compatible with automated placement and reflow processes. Pin 1 is marked with a notch and is a No Connect (NC) terminal.
How does hardware data protection work in AT49BV001NT-12JI?
AT49BV001NT-12JI implements three hardware protections: (1) VCC sense circuitry disables programming if supply drops below ~1.8 V; (2) simultaneous OE low, CE high, or WE high inhibits write cycles; and (3) input noise filters reject pulses <15 ns on WE/CE. These features operate autonomously - no firmware intervention required - making AT49BV001NT-12JI resilient to brownouts, ESD transients, and bus glitches.
Can AT49BV001NT-12JI be used as a direct replacement for AT49BV001N-12JI?
No - AT49BV001NT-12JI and AT49BV001N-12JI are not functionally interchangeable. The NT variant uses top-boot architecture (boot block at 1C000H–1FFFFH) and supports 12 V RESET override; the N variant uses bottom-boot (00000H–03FFFH) and lacks RESET override. Swapping them risks incorrect reset vector execution or inability to recover locked boot sectors. Always verify boot address mapping and RESET functionality before substitution.
AT49BV001NT-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)
AT49BV001NT-12JI FAQ
1.How can I place an order for AT49BV001NT-12JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001NT-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 AT49BV001NT-12JI reliable?
The price and inventory of AT49BV001NT-12JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001NT-12JI is usually 5 days.
3.What payment methods are accepted for AT49BV001NT-12JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001NT-12JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001NT-12JI?
AT49BV001NT-12JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001NT-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 AT49BV001NT-12JI?
For technical support, including AT49BV001NT-12JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001NT-12JI requirements.
6.How does Aetrix verify that AT49BV001NT-12JI is sourced from the original manufacturer or authorized distributors?
All AT49BV001NT-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 AT49BV001NT-12JI meets industry standards.
7.What is the process for return or replacement of AT49BV001NT-12JI?
All AT49BV001NT-12JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001NT-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 AT49BV001NT-12JI part is unused and in its original packaging.
Return procedure for AT49BV001NT-12JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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