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Microchip Technology AT49BV002AN-70JI
- Part No.:
- AT49BV002AN-70JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV002AN-70JI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,039
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Product details
Overview
AT49BV002AN-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, 4-second chip erase cycle, and byte-programmable architecture featuring one 16 KB boot block with hardware lockout, two 8 KB parameter blocks, and four main memory blocks. It supports in-system reprogramming without high-voltage programming inputs and is used in embedded firmware storage for industrial controllers and legacy microcontroller-based systems.
For engineers reviewing the AT49BV002AN-70JI datasheet, AT49BV002AN-70JI pinout, AT49BV002AN-70JI application, or AT49BV002AN-70JI equivalent, key selection criteria include its PLCC-32 package, 70 ns access timing, boot-block write protection behavior, sector-erase capability, and compatibility with standard EPROM-like CE/OE/WE control interfaces.
Technical Context
The AT49BV002AN-70JI implements a nonvolatile CMOS Flash memory array organized as 262,144 words × 8 bits, with internal program control logic and autonomous erase timing. Its command-set architecture uses six-byte software sequences for chip/sector erase and boot-lock enable, requiring no external clocks during erase operations.
It features dual-line bus control (CE + OE) to prevent contention, DATA polling on I/O7 and toggle-bit detection on I/O6 for operation completion signaling, and hardware data protection via VCC sense, noise filtering, and input-level inhibit logic - all operating within the industrial temperature range of −40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), directly replaceable for EPROM-based boot code storage in 8-bit microcontroller systems |
| Read Access Time | 70 ns maximum - meets timing requirements for 14 MHz Z80 or 8051 derivatives without wait states |
| Supply Voltage | 2.7 V to 3.6 V only - eliminates need for 5 V programming supply; compatible with battery-backed or low-power industrial rails |
| Erase Cycle Time | 4 seconds typical for full chip erase - enables field firmware updates with predictable downtime |
| Byte Programming Time | 30 µs typical - allows rapid patching of individual configuration bytes without block-level overhead |
| Endurance | 10,000 write/erase cycles - sufficient for infrequent firmware upgrades over 10+ year product lifecycles |
| Standby Current | 50 µA CMOS - supports low-power sleep modes in always-on industrial monitoring devices |
Pinout & Package
AT49BV002AN-70JI is housed in a 32-lead Plastic Leaded Chip Carrier (PLCC-32) package per JEDEC MS-016, Variation AE, with pin 1 identifier at corner and lead coplanarity ≤ 0.102 mm. Pin 1 is NC (no connect) for this variant.
| 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 |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read access; inhibits programming when high |
| OE | Output Enable | Active-low output control; used with CE to manage bus contention; must be high during programming/erase |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence timing |
| I/O0–I/O7 | Data Bus | Bidirectional 8-bit data interface; I/O7 used for DATA polling, I/O6 for toggle-bit status indication |
| VCC | Power Supply | 2.7–3.6 V core supply; internal regulation ensures stable programming voltage across rail variation |
| GND | Ground | Reference for all I/O and internal logic; decoupling required within 10 mm of VCC pin |
| RESET | Reset Input | Not functional on AT49BV002AN(T); tied high or left open; no boot override capability |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Lockout | 16 KB protected region (00000H–03FFFH) prevents accidental overwrite of bootloader code once enabled via 6-byte command sequence |
| Sector-Erasable Architecture | Independent erase of two 8 KB parameter blocks and four main blocks (32 KB + 3×64 KB) enables granular firmware updates without full-chip erase |
| DATA Polling & Toggle Bit | Real-time status feedback via I/O7 complement or I/O6 toggling eliminates need for fixed delay timers during programming/erase |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibit (OE low/CE high/WE high blocks writes) |
| EPROM-Compatible Interface | Standard CE/OE/WE timing and bus behavior allows drop-in replacement for 27Cxxx EPROMs in legacy designs |
Applications
| Industrial PLC Firmware Storage | Legacy Microcontroller Bootloader |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing reliable code execution on power-up; 70 ns access ensures deterministic startup timing for real-time control loops. Use Value: Boot block lockout prevents corruption of critical startup routines during field firmware updates, maintaining system safety integrity. | Use Scenario: Hosting bootloader code for 8051 or Z80-based embedded systems where field-upgradable application firmware resides in main memory blocks. IC Role / Device Role / Timing Role: Primary boot device mapped at reset vector; sector-erase capability allows independent update of application sections while preserving bootloader. Use Value: Eliminates need for external programming hardware - in-system reprogramming via standard MCU I/O pins reduces service cost and downtime. |
| Medical Device Configuration Memory | Point-of-Sale Terminal Parameter Storage |
Use Scenario: Retaining calibration data, user preferences, and regulatory-compliant operational settings in Class II medical instruments with long service life. IC Role / Device Role / Timing Role: Parameter block storage (two 8 KB sections) holding persistent settings accessible during normal operation and service mode. Use Value: 10,000-cycle endurance and 50 µA standby current support infrequent but mission-critical updates over 15-year device lifetime. | Use Scenario: Storing localized language strings, tax tables, and peripheral configuration in retail POS terminals subject to regional compliance updates. IC Role / Device Role / Timing Role: Field-updatable memory partitioned into dedicated sectors for fast, targeted updates without erasing transaction log or security keys. Use Value: Sector-erase granularity minimizes update window - only affected parameter blocks are rewritten, reducing risk of corruption during power interruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49BV002A-70JI | Same density, speed, and package; includes functional RESET pin enabling boot block override at 12 V | Required where field reprogramming of locked boot sector is necessary (e.g., recovery mode) | Select only if boot override capability is needed; otherwise AT49BV002AN-70JI offers identical functionality at lower cost |
| SST39VF200A-70-4C-NHE | 2 Mbit, 70 ns, 3 V operation; supports CFI query, no boot block lockout; TSOP-48 package | Lacks dedicated boot protection; requires external logic or firmware for secure bootloader management | Choose for CFI-compliant systems needing standardized flash interface; not suitable as direct replacement due to different pinout and missing lockout feature |
Compared with AT49BV002A-70JI, the AT49BV002AN-70JI omits RESET functionality - simplifying design where boot override is unnecessary. Versus SST39VF200A, it provides hardware-enforced boot protection and PLCC-32 compatibility but lacks CFI support and uses a proprietary command set.
Availability
AT49BV002AN-70JI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy microcontroller bootloader deployment, and medical device configuration memory requiring stable component supply across extended production lifecycles.
Supply support for AT49BV002AN-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 devices.
The AT49BV002AN-70JI belongs to Atmel's Battery-Voltage™ Flash memory family, designed specifically for single-supply in-system reprogrammability in space-constrained industrial and embedded applications where 5 V programming infrastructure is unavailable.
FAQ
What is the function of pin 1 on the AT49BV002AN-70JI?
Pin 1 on the AT49BV002AN-70JI is a no-connect (NC) terminal, as explicitly stated in the datasheet for the AT49BV002AN(T) variants. It must not be connected to any signal or power net. This differs from the AT49BV002A-70JI, where pin 1 serves as the functional RESET input. The AT49BV002AN-70JI does not support boot block override via RESET voltage injection.
Does the AT49BV002AN-70JI support in-system programming without external high-voltage supplies?
Yes, the AT49BV002AN-70JI supports full in-system programming using only its 2.7–3.6 V VCC supply. It requires no external 12 V or 5 V programming voltages. All commands - including byte programming, sector erase, chip erase, and boot lock enable - are executed via standard 3 V logic-level signals applied to CE, OE, WE, and address/data lines per defined timing sequences.
How is boot block protection implemented in the AT49BV002AN-70JI?
The AT49BV002AN-70JI implements boot block protection via a 6-byte command sequence that permanently enables lockout for the 16 KB boot sector (00000H–03FFFH). Once enabled, the boot block cannot be erased or programmed at any VCC level ≤ 5.5 V. Unlike the AT49BV002A variant, the AT49BV002AN-70JI lacks RESET pin functionality, so no 12 V override is possible.
What are the valid sector address ranges for the AT49BV002AN-70JI?
The AT49BV002AN-70JI uses the base address map: boot block = 00000H–03FFFH (16 KB), parameter block 1 = 04000H–05FFFH (8 KB), parameter block 2 = 06000H–07FFFH (8 KB), main block 1 = 08000H–0FFFFH (32 KB), main block 2 = 10000H–1FFFFH (64 KB), main block 3 = 20000H–2FFFFH (64 KB), and main block 4 = 30000H–3FFFFH (64 KB).
Can the AT49BV002AN-70JI be used as a direct replacement for standard EPROMs like the 27C256?
Yes, the AT49BV002AN-70JI is pin-compatible and functionally compatible with 27C256 EPROMs in read mode: identical 32-pin PLCC footprint, same CE/OE/WE control protocol, and EPROM-like output behavior. However, write operations require specific command sequences instead of UV erasure, and the AT49BV002AN-70JI must be initialized in read mode after power-up before issuing commands.
AT49BV002AN-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)
AT49BV002AN-70JI FAQ
1.How can I place an order for AT49BV002AN-70JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002AN-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 AT49BV002AN-70JI reliable?
The price and inventory of AT49BV002AN-70JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002AN-70JI is usually 5 days.
3.What payment methods are accepted for AT49BV002AN-70JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002AN-70JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002AN-70JI?
AT49BV002AN-70JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002AN-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 AT49BV002AN-70JI?
For technical support, including AT49BV002AN-70JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002AN-70JI requirements.
6.How does Aetrix verify that AT49BV002AN-70JI is sourced from the original manufacturer or authorized distributors?
All AT49BV002AN-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 AT49BV002AN-70JI meets industry standards.
7.What is the process for return or replacement of AT49BV002AN-70JI?
All AT49BV002AN-70JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002AN-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 AT49BV002AN-70JI part is unused and in its original packaging.
Return procedure for AT49BV002AN-70JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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