My Inquiry
My Account
Microchip Technology AT49BV002A-70JI
- Part No.:
- AT49BV002A-70JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV002A-70JI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,603
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT49BV002A-70JI from Atmel is a 2 Mbit (256K × 8) single-supply 2.7–3.6 V Flash memory IC with 70 ns read access time, sector-based architecture (16K-byte boot block + two 8K-byte parameter blocks + four main memory blocks), and hardware data protection. It supports byte-by-byte programming (30 µs/byte typical), 4-second chip erase, and operates across –40°C to +85°C for industrial embedded firmware storage.
For engineers reviewing the AT49BV002A-70JI datasheet, AT49BV002A-70JI pinout, AT49BV002A-70JI application, or AT49BV002A-70JI equivalent, this page delivers verified technical context, real-world use cases, validated alternatives, and supply-chain support for in-system reprogrammable nonvolatile memory selection in legacy microcontroller boot systems.
Technical Context
The AT49BV002A-70JI implements a standard parallel Flash interface with CE/OE/WE control logic, supporting EPROM-like read operation and command-based programming/erasure. Its internal program controller manages 4-cycle byte programming and 6-cycle sector/chip erase sequences without external timing clocks.
It features dual-level hardware protection: VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and boot block lockout-enabled via six-command sequence and override-capable via 12 V on RESET (only on A/T variants, not AN/ANT). The RESET pin is functional and not NC on AT49BV002A-70JI.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), organized as 262,144 words × 8 bits - directly maps to 8-bit microcontroller data bus without glue logic. |
| Read Access Time | 70 ns max - enables direct execution from Flash at up to ~14 MHz system clock when interfaced with fast microcontrollers. |
| Supply Voltage | 2.7 V to 3.6 V single supply - compatible with 3.3 V logic systems and battery-backed operation (Battery-Voltage™ design). |
| Active Current | 15 mA typical - supports low-power active reads in portable or energy-constrained industrial controllers. |
| Standby Current | 50 µA CMOS standby - ensures minimal quiescent draw during firmware idle states. |
| Erase Cycle Time | 4 seconds typical for full chip erase - enables rapid field firmware updates without extended downtime. |
| Programming End Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delay timers in host firmware. |
Pinout & Package
AT49BV002A-70JI is packaged in a 32-lead Plastic J-Leaded Chip Carrier (PLCC), JEDEC MS-016 Variation AE compliant, with 1.27 mm pitch, 12.45 mm × 14.95 mm body, and pin 1 identifier corner. Pin 1 is marked by a notch or dot; pin numbering is counterclockwise from pin 1.
| 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 | Bidirectional Data Bus | 8-bit parallel data path for read, program, and identification modes; supports true bidirectional I/O without direction control pins. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read output; enables bus contention avoidance in multi-device systems. |
| OE | Output Enable | Active-low output gate; controls data bus tristate independently of CE - critical for shared-bus timing flexibility. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command cycle; used with CE to initiate all programming/erase operations. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces outputs to high-Z; 12 V input enables boot block override - functional on AT49BV002A-70JI (not NC). |
| VCC | Power Supply | +2.7 V to +3.6 V supply; powers core logic and I/O buffers; internal VCC sense prevents programming below 1.8 V. |
| GND | Ground Reference | Signal and power ground reference for all inputs, outputs, and internal circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte protected region (00000H–03FFFH) with command-enabled permanent write disable - secures bootloader code against accidental overwrite. |
| Hardware Data Protection | Triple-layer safeguard: VCC sense, noise-filtered WE/CE inputs, and control-line inhibit (OE low/CE high/WE high blocks programming) - eliminates spurious writes in noisy environments. |
| Sector Erase Flexibility | Independent erasure of two 8K-byte parameter blocks and four main memory blocks (32K/64K/64K/64K) - enables modular firmware updates without full chip erase. |
| DATA Polling & Toggle Bit | Real-time end-of-program detection via I/O7 complement or I/O6 toggling - removes fixed-timing dependencies and improves host firmware robustness. |
| Single 3.3 V Operation | No 5 V or 12 V programming voltage required - simplifies power design and eliminates level-shifting for 3.3 V microcontrollers. |
Applications
| Industrial PLC Firmware Storage | Legacy Microcontroller Bootloader Memory |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers where field updates must preserve bootloader integrity. IC Role / Device Role / Timing Role: Nonvolatile parallel Flash memory providing direct-mapped code storage with hardware-protected boot sector. Use Value: Boot block lockout ensures bootloader remains unaltered during application firmware upgrades, preventing bricking of deployed units. |
Use Scenario: Replacing obsolete EPROMs in 8-bit microcontroller-based instrumentation systems requiring in-circuit reprogramming. IC Role / Device Role / Timing Role: Drop-in Flash replacement for 27C256-style EPROMs with identical 32-pin PLCC footprint and CE/OE/WE interface timing. Use Value: 70 ns access time and EPROM-compatible read protocol enable zero-change hardware migration from UV-erasable EPROMs. |
| Embedded HMI Configuration Storage | Medical Device Parameter Retention |
Use Scenario: Holding user-configurable display layouts, calibration offsets, and language packs in human-machine interface panels. IC Role / Device Role / Timing Role: Parameter block–based Flash memory partitioned into dedicated 8K-byte sections for independent update of UI assets vs. runtime settings. Use Value: Sector-erase capability allows updating display resources without disturbing calibration data stored in adjacent parameter blocks. |
Use Scenario: Retaining device-specific calibration constants, usage logs, and safety-critical configuration in Class II medical electronics. IC Role / Device Role / Timing Role: Low-power, high-reliability Flash memory with 10,000 write cycles and 50 µA standby current for battery-backed retention. Use Value: CMOS standby current <50 µA extends backup battery life beyond 5 years in always-on diagnostic equipment. |
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 | 4 Mbit density (512K × 8), 70 ns access, 3.0–3.6 V supply; no boot block lockout; uses different command set (SST proprietary). | Higher capacity but lacks hardware-enforced boot protection; requires firmware rewrite for command handling. | Choose when additional memory space is needed and boot security is managed in software. |
| MX29LV200CTTI-70G | 2 Mbit (256K × 8), 70 ns, 3.0–3.6 V; includes CFI-compliant command set and 16K-byte boot sector with write protection, but RESET pin not used for override. | CFI compatibility eases driver portability; boot protection is software-configurable but lacks 12 V RESET override. | Prefer for new designs requiring standardized Flash interfaces and broader ecosystem tool support. |
Compared with SST39VF200A-70-4C-NHE and MX29LV200CTTI-70G, the AT49BV002A-70JI uniquely combines 12 V RESET-based boot block override, EPROM-equivalent timing, and Atmel's proven Battery-Voltage™ low-voltage reliability - making it optimal for maintaining legacy industrial firmware infrastructure.
Availability
AT49BV002A-70JI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy microcontroller bootloader replacement, embedded HMI configuration storage, and medical device parameter retention requiring stable component supply over extended production lifecycles.
Supply support for AT49BV002A-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 fabless semiconductor company specializing in microcontrollers, Flash memory, and secure authentication ICs, with a legacy of robust industrial-grade nonvolatile memory solutions.
The AT49BV002A-70JI belongs to Atmel's Battery-Voltage™ Flash memory product line, designed specifically for reliable in-system reprogramming in 3.3 V embedded systems where low-voltage operation, data integrity, and long-term firmware update capability are critical.
FAQ
What is the operating temperature range for the AT49BV002A-70JI?
The AT49BV002A-70JI is rated for industrial operation from –40°C to +85°C, as confirmed by its ordering code suffix "I" and the DC/AC operating range table in the official Atmel datasheet Rev. 3353D. This range ensures stable performance in harsh environments such as factory automation controllers and outdoor instrumentation where thermal cycling occurs.
Does the AT49BV002A-70JI support hardware boot block protection?
Yes, the AT49BV002A-70JI supports hardware-enforced boot block programming lockout via a six-command sequence. Once enabled, the 16K-byte boot sector (00000H–03FFFH) cannot be erased or programmed at ≤5.5 V. The RESET pin accepts 12 V to temporarily override this lock - a feature confirmed functional on the "A" variant (AT49BV002A-70JI), unlike the "AN" or "ANT" versions.
What package type is used for the AT49BV002A-70JI?
The AT49BV002A-70JI uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package, designated as "32J" in Atmel's ordering information. Its dimensions (12.45 mm × 14.95 mm), pin 1 identifier, and JEDEC MS-016 Variation AE compliance are fully documented in the packaging drawings section of the datasheet.
How does the AT49BV002A-70JI detect end-of-program without polling fixed delays?
The AT49BV002A-70JI provides two hardware-assisted methods: DATA polling (I/O7 returns complement of loaded data until completion, then true data) and Toggle Bit (I/O6 toggles between 0 and 1 during programming, then stabilizes). Both are specified in the datasheet's AC characteristics and require no external timer - enabling deterministic, interrupt-driven host firmware.
Is the RESET pin on the AT49BV002A-70JI a no-connect (NC) or functional?
The RESET pin on the AT49BV002A-70JI is fully functional - it is not NC. Datasheet Section 2 explicitly states that RESET is "not available on the AT49BV002AN(T)" but confirms its presence and 12 V override capability for boot block reprogramming on the base "A" variant. Pin 1 of the PLCC package is RESET, and its behavior is defined in the Operating Modes table.
AT49BV002A-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)
AT49BV002A-70JI FAQ
1.How can I place an order for AT49BV002A-70JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002A-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 AT49BV002A-70JI reliable?
The price and inventory of AT49BV002A-70JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002A-70JI is usually 5 days.
3.What payment methods are accepted for AT49BV002A-70JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002A-70JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002A-70JI?
AT49BV002A-70JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002A-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 AT49BV002A-70JI?
For technical support, including AT49BV002A-70JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002A-70JI requirements.
6.How does Aetrix verify that AT49BV002A-70JI is sourced from the original manufacturer or authorized distributors?
All AT49BV002A-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 AT49BV002A-70JI meets industry standards.
7.What is the process for return or replacement of AT49BV002A-70JI?
All AT49BV002A-70JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002A-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 AT49BV002A-70JI part is unused and in its original packaging.
Return procedure for AT49BV002A-70JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV002A-70JI Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
