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Microchip Technology AT49BV002AT-70JI
- Part No.:
- AT49BV002AT-70JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV002AT-70JI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49BV002AT-70JI from Atmel is a 2 Mbit (256K × 8) single-supply Flash memory IC operating at 2.7–3.6 V, featuring 70 ns read access time, 4-second chip erase, 30 µs/byte programming, and hardware data protection. It serves as nonvolatile program/data storage in embedded microcontroller systems requiring in-system reprogrammability and boot code integrity.
For engineers reviewing the AT49BV002AT-70JI datasheet, AT49BV002AT-70JI pinout, AT49BV002AT-70JI application, or AT49BV002AT-70JI equivalent, this page delivers verified electrical specs, PLCC-32 package details, sector-based erase architecture, boot block lockout behavior, and real-world design implications for industrial firmware storage.
Technical Context
The AT49BV002AT-70JI implements a sector-erasable Flash architecture with one 16 KB boot block (address range 3C000H–3FFFFH), two 8 KB parameter blocks, and four main memory blocks (32 KB + 3 × 64 KB). Its command-set-driven operation uses standard CE/OE/WE control lines and supports software-controlled chip/sector erase and byte programming without high-voltage programming pins.
It features DATA polling (I/O7 complement) and toggle-bit (I/O6) methods for cycle completion detection, hardware VCC sense (<1.8 V inhibit), noise filtering on WE/CE, and RESET-pin-based 12 V override for boot block reprogramming - a capability absent in AN variants but confirmed for AT49BV002AT-70JI per Rev. 3353D.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - sufficient for full bootloader + configuration data in resource-constrained MCU systems. |
| Read Access Time | 70 ns max - enables direct execution from Flash (XIP) in 10–14 MHz bus systems without wait states. |
| Supply Voltage | 2.7 V to 3.6 V - compatible with 3.3 V logic and battery-backed industrial systems; no 5 V required. |
| Erase Time | 4 seconds typical for full chip erase - allows rapid field firmware updates during maintenance windows. |
| Programming Speed | 30 µs/byte typical - supports efficient incremental patching of parameter tables or logging sectors. |
| Endurance | 10,000 write/erase cycles - validated for applications requiring frequent configuration updates over 5+ year product life. |
| Standby Current | 50 µA CMOS - critical for low-power modes in always-on industrial controllers and sensor nodes. |
Pinout & Package
AT49BV002AT-70JI is packaged in a 32-lead Plastic Leaded Chip Carrier (PLCC-32), JEDEC MS-016 compliant, with 1.27 mm pitch, 12.45 mm × 14.95 mm body, and lead coplanarity ≤ 0.102 mm. Pin 1 identifier is a corner chamfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A11 is "don't care" in command cycles per datasheet note. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface; I/O7 used for DATA polling, I/O6 for toggle-bit status monitoring during program/erase. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read; latches address on falling edge during commands. |
| OE | Output Enable | Active-low output control; high during programming/erase to prevent bus contention; enables toggle-bit polling. |
| WE | Write Enable | Active-low write strobe; latches data on rising edge during command sequences; controls timing of byte load and erase initiation. |
| RESET* | Reset / Boot Override | Active-low reset; applying 12.0 V ± 0.5 V enables boot block reprogramming even when lockout is active - unique to AT/T variants. |
| VCC, GND | Power Supply | Single 2.7–3.6 V supply; decoupling required within 10 mm due to 15 mA active current and fast switching transients. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Lockout | 16 KB sector (3C000H–3FFFFH) programmable lockout via 6-cycle command sequence; prevents accidental overwrite of secure bootloader code. |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filtering (15 ns pulse rejection on WE/CE), and control-line interlock (OE low/CE high/WE high blocks writes). |
| Flexible Erase Architecture | Independent sector erase for two 8 KB parameter blocks and four main memory blocks - enables selective firmware updates without full chip erase. |
| Real-time Cycle Monitoring | DATA polling (I/O7 complement) and toggle-bit (I/O6) provide software-detectable program/erase completion - eliminates need for fixed delay timers. |
| In-System Reprogrammability | No external high-voltage programmer required; all operations executed via standard 3.3 V bus signals and documented command sequences. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
|
Use Scenario: Storing firmware images and calibration tables in programmable logic controllers deployed in factory automation environments with wide temperature swings (-40°C to +85°C). IC Role / Device Role / Timing Role: Nonvolatile program memory mapped into MCU address space; provides 70 ns read latency for deterministic scan-cycle execution. Use Value: Boot block lockout ensures bootloader integrity across 10,000+ field firmware updates; 50 µA standby current extends uptime in battery-buffered backup scenarios. |
Use Scenario: Retaining device-specific calibration coefficients, user preferences, and audit logs in portable diagnostic equipment subject to strict EMC and reliability requirements. IC Role / Device Role / Timing Role: Parameter storage peripheral accessed via SPI-to-parallel bridge; sector-erase capability isolates calibration data from operational logs. Use Value: Hardware data protection prevents corruption during power brownouts; 2.7–3.6 V operation matches Li-ion battery discharge profile without regulation overhead. |
| Automotive Body Control Module | Network Router Boot Image Storage |
|
Use Scenario: Holding boot code and feature-enable flags in automotive BCMs where ASIL-B functional safety requires verified flash integrity and controlled update paths. IC Role / Device Role / Timing Role: Secure boot memory with RESET-pin 12 V override enabling factory reflash of locked boot sectors during end-of-line testing. Use Value: Confirmed 10,000-cycle endurance meets automotive 15-year lifecycle targets; PLCC-32 package withstands thermal cycling in under-hood environments. |
Use Scenario: Storing primary and fallback boot images in enterprise-grade routers requiring zero-downtime firmware upgrades and rollback capability. IC Role / Device Role / Timing Role: Dual-image Flash storage with independent sector erase - enables atomic swap between active/inactive image banks. Use Value: 4-second chip erase enables sub-5 second failover; DATA polling ensures precise synchronization between bootloader and upgrade agent. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF200A-70-4C-NHE | Same density (2 Mbit), 70 ns access, PLCC-32, but uses SST's multi-byte programming (4-byte burst) vs. AT49BV002AT-70JI's byte-by-byte; no RESET-based boot override. | Lacks 12 V boot unlock; relies on software-only lock/unlock - less suitable for factory reflash workflows requiring hardware-level recovery. | Select when cost sensitivity outweighs need for hardware-assisted boot recovery; verify command set compatibility in existing firmware. |
| MX29LV200CTTI-70G | 2 Mbit, 70 ns, TSOP-48 package (not PLCC); includes CFI query support and wider VCC range (2.7–3.6 V); no dedicated RESET pin for boot override. | TSOP-48 footprint incompatible with PLCC-32 PCB; CFI support simplifies auto-detection but adds driver complexity vs. AT49BV002AT-70JI's simple command protocol. | Choose only if board redesign accommodates TSOP-48; prefer AT49BV002AT-70JI for drop-in replacement in legacy PLCC layouts with boot security requirements. |
Compared with SST39VF200A-70-4C-NHE and MX29LV200CTTI-70G, AT49BV002AT-70JI uniquely combines PLCC-32 packaging, 12 V RESET-based boot override, and proven 10,000-cycle endurance in industrial temperature range - making it optimal for field-upgradable systems where bootloader integrity and hardware-level recovery are non-negotiable.
Availability
AT49BV002AT-70JI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, automotive body control modules, and network router boot image storage requiring stable component supply and long-term obsolescence management.
Supply support for AT49BV002AT-70JI 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 manufacturer specializing in microcontrollers, nonvolatile memory, and secure authentication solutions for industrial, automotive, and IoT applications.
The AT49BV002AT-70JI belongs to Atmel's Battery-Voltage™ Flash memory family, designed specifically for single-supply, in-system reprogrammable storage in battery-powered and wide-input-voltage industrial systems.
FAQ
What is the boot block address range for AT49BV002AT-70JI?
The boot block for AT49BV002AT-70JI occupies addresses 3C000H to 3FFFFH (16 KB), distinct from the AT49BV002A(N) variant's 00000H–03FFFH range. This relocated boot sector enables flexible memory mapping in systems where lower-address space is reserved for RAM or peripherals. The AT49BV002AT-70JI datasheet Rev. 3353D explicitly confirms this layout in Section 4 and the Block Diagram.
Does AT49BV002AT-70JI support 12 V boot block override?
Yes, AT49BV002AT-70JI supports 12.0 V ± 0.5 V applied to the RESET pin to override boot block programming lockout - a feature confirmed in the "BOOT BLOCK PROGRAMMING LOCKOUT OVERRIDE" section of the datasheet and explicitly noted as unavailable on AN(T) variants. This enables factory reflash of locked boot sectors without requiring full chip erase.
What package type is used by AT49BV002AT-70JI?
AT49BV002AT-70JI uses a 32-lead Plastic Leaded Chip Carrier (PLCC-32) package, designated as "32J" in Atmel's ordering information. Its dimensions (12.45 mm × 14.95 mm), JEDEC MS-016 compliance, and pin 1 chamfer are fully detailed in Package Drawing 32J on page 15 of the datasheet.
How is end-of-program detected on AT49BV002AT-70JI?
AT49BV002AT-70JI supports two hardware-confirmed methods: DATA polling (read last programmed byte → I/O7 returns complement until complete) and toggle-bit detection (I/O6 toggles during program/erase, stops when complete). Both are characterized in the datasheet's Waveforms and Characteristics sections and require no external timing components.
What is the maximum erase time for AT49BV002AT-70JI?
The maximum chip erase time for AT49BV002AT-70JI is 8 seconds, with a typical value of 4 seconds, as specified in the "Program Cycle Characteristics" table (page 11) under parameter tEC. Sector erase times are not individually specified but fall within the same internal timing engine constraints.
AT49BV002AT-70JI 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:
- 2Mbit
- Memory Organization:
- 256K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 70 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)
AT49BV002AT-70JI FAQ
1.How can I place an order for AT49BV002AT-70JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002AT-70JI 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 AT49BV002AT-70JI reliable?
The price and inventory of AT49BV002AT-70JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002AT-70JI is usually 5 days.
3.What payment methods are accepted for AT49BV002AT-70JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002AT-70JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002AT-70JI?
AT49BV002AT-70JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002AT-70JI 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 AT49BV002AT-70JI?
For technical support, including AT49BV002AT-70JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002AT-70JI requirements.
6.How does Aetrix verify that AT49BV002AT-70JI is sourced from the original manufacturer or authorized distributors?
All AT49BV002AT-70JI 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 AT49BV002AT-70JI meets industry standards.
7.What is the process for return or replacement of AT49BV002AT-70JI?
All AT49BV002AT-70JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002AT-70JI, 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 AT49BV002AT-70JI part is unused and in its original packaging.
Return procedure for AT49BV002AT-70JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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