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Microchip Technology AT49BV001AN-55JI
- Part No.:
- AT49BV001AN-55JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV001AN-55JI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,052
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Product details
Overview
AT49BV001AN-55JI from Atmel is a 1 Mbit (128K × 8) single-supply 2.7–3.6 V in-system reprogrammable Flash memory IC with 55 ns read access time, 30 µs/byte programming, and sector-erase architecture including a 16K-byte boot block with hardware lockout. It operates across –40°C to +85°C and supports embedded firmware storage in industrial microcontroller systems.
For engineers reviewing the AT49BV001AN-55JI datasheet, AT49BV001AN-55JI pinout, AT49BV001AN-55JI application, or AT49BV001AN-55JI equivalent, this page delivers verified electrical specs, PLCC-32 pin mapping, boot-block protection behavior, DATA polling/toggle-bit status detection, and real-world use cases for secure code storage and field-upgradable firmware.
Technical Context
The AT49BV001AN-55JI implements a standard NOR Flash architecture with CE/OE/WE control logic, internal program timer, and command-register-based operation. It uses 5V-compatible command sequences (e.g., 555H/AAH, AAH/55H) over a 2.7–3.6 V supply without requiring external high-voltage programming circuitry.
Its memory is partitioned into one 16K-byte boot block (address 00000H–03FFFH), two 8K-byte parameter blocks, and two main memory blocks (32K + 64K bytes). The RESET pin is NC on this variant, and boot block lockout-once enabled-is permanent under ≤5.5 V operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - supports full firmware image storage for 8-bit MCUs. |
| Read Access Time | 55 ns - enables direct execution (XIP) from Flash in timing-critical boot loaders. |
| Byte Programming Time | 30 µs typical - allows rapid field updates of configuration or calibration data without system downtime. |
| Erase Cycle Time | 3 seconds max for chip or sector erase - balances speed and reliability for in-system reprogramming. |
| Supply Voltage Range | 2.7 V to 3.6 V - compatible with single-cell Li-ion or regulated 3.3 V rails, eliminating level-shifting needs. |
| Active / Standby Current | 15 mA active, 50 µA CMOS standby - extends battery life in always-on embedded controllers. |
| Endurance | 10,000 write/erase cycles - sufficient for firmware revision management over product lifetime. |
Pinout & Package
AT49BV001AN-55JI is housed in a 32-lead Plastic Leaded Chip Carrier (PLCC) package per JEDEC MS-016, Variation AE. Pin 1 is marked by a corner notch; pin 1 is NC (no connect) on this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-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 valid read access. |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention during shared-memory access. |
| WE | Write Enable | Active-low write strobe; latches address/data during command entry and byte programming. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface for read, program, and status polling (I/O6 = toggle bit, I/O7 = DATA polling). |
| VCC | Power Supply | 2.7–3.6 V core supply; internal voltage regulation ensures stable programming across voltage range. |
| GND | Ground Reference | Common return for all signals; decoupling capacitor required near VCC pin for noise immunity. |
| RESET | No Connect (NC) | Pin 1 on PLCC package is unconnected - boot block override via 12 V on RESET is not supported. |
| NC | No Connect | Pin 1 (PLCC) and pin 9 (TSOP) are NC; must be left floating or tied to GND per board layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte region (00000H–03FFFH) permanently protected after enable command - secures bootloader integrity against accidental overwrite. |
| DATA Polling & Toggle Bit | I/O7 complement indicates programming completion; I/O6 toggles during erase/program - eliminates need for external timers or status registers. |
| Sector-Erase Architecture | Independent erasure of boot block, two parameter blocks (8K each), and two main memory blocks - enables granular firmware updates without full chip 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) - prevents spurious writes in noisy environments. |
| Single-Voltage In-System Reprogrammability | Uses only 2.7–3.6 V supply for read, program, and erase - eliminates high-voltage charge pumps and simplifies PCB design. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Security |
|---|---|
Use Scenario: Storing immutable bootloader and field-upgradable application firmware in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile code storage with hardware-enforced boot block protection and 55 ns read latency for deterministic startup timing. Use Value: Prevents corruption of critical startup code during power interruption or remote update; sector erase enables patch deployment without full firmware reload. |
Use Scenario: Securing certified bootloader code in FDA-regulated diagnostic equipment where firmware integrity validation is mandatory. IC Role / Device Role / Timing Role: Trusted boot memory with permanent lockout of 16K-byte boot sector and DATA polling for verified programming completion. Use Value: Meets IEC 62304 software lifecycle requirements by guaranteeing bootloader immutability post-certification; 10,000-cycle endurance supports long-term device serviceability. |
| Automotive Body Control Module | Networking Equipment Configuration Storage |
Use Scenario: Holding calibrated sensor parameters and CAN protocol stack in automotive body control units operating across –40°C to +85°C. IC Role / Device Role / Timing Role: Temperature-stable Flash memory with 50 µA standby current and sector-erase capability for parameter updates during vehicle service. Use Value: Enables dealership-level calibration updates without replacing ECU hardware; low-power standby reduces parasitic drain on vehicle battery. |
Use Scenario: Storing MAC addresses, PHY initialization tables, and firmware patches in enterprise switches and routers. IC Role / Device Role / Timing Role: Field-programmable configuration memory with fast 30 µs/byte programming and hardware write protection for critical identifiers. Use Value: Allows OEMs to pre-load unique device identities and support zero-touch provisioning; NC RESET pin simplifies board-level reset signal routing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF010-55-4C-NHE | 55 ns access, 3.3 V only, 1 Mbit, PLCC-32; lacks boot block lockout and uses different command set. | No hardware-protected boot sector; requires software-managed write protection. | Choose when boot security is managed externally and command compatibility with SST39 series is preferred. |
| MX29LV160CBTI-55G | 55 ns access, 3.3 V, 16 Mbit (2M × 8), TSOP-48; includes CFI-compliant boot block but larger density and different pinout. | Higher capacity and industry-standard CFI interface; incompatible footprint and address bus width. | Choose when future scalability to larger firmware images is needed and board redesign is acceptable. |
Compared with SST39VF010-55-4C-NHE and MX29LV160CBTI-55G, the AT49BV001AN-55JI provides unique permanent boot block lockout under 5.5 V, PLCC-32 compatibility with legacy designs, and guaranteed 10,000-cycle endurance - making it optimal for cost-sensitive, space-constrained industrial firmware storage where bootloader integrity is non-negotiable.
Availability
AT49BV001AN-55JI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader security, automotive body control modules, and networking equipment configuration storage requiring stable component supply and long-term obsolescence management.
Supply support for AT49BV001AN-55JI 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, Flash memory, and secure authentication devices for industrial, automotive, and consumer applications.
The AT49BV001AN-55JI belongs to Atmel's Battery-Voltage™ Flash memory product line, designed specifically for single-supply, in-system reprogrammable code and data storage in resource-constrained embedded systems.
FAQ
What is the function of the RESET pin on AT49BV001AN-55JI?
The RESET pin on AT49BV001AN-55JI is a no-connect (NC) terminal per the datasheet - it is unassigned and must be left floating or tied to GND. Unlike the AT49BV001A(T) variant, this part does not support RESET-driven boot block override or hardware reset functionality. All reset behavior is handled externally by the host system, and the AT49BV001AN-55JI enters read mode automatically on power-up if control lines meet read conditions.
How does boot block lockout work on AT49BV001AN-55JI?
Boot block lockout on AT49BV001AN-55JI is enabled via a six-cycle command sequence (555H/AAH → AAH/55H → 555H/80H → 555H/AAH → AAH/55H → 555H/40H). Once activated, the 16K-byte boot block (00000H–03FFFH) becomes permanently write-protected under ≤5.5 V operation. This protection cannot be reversed, and the RESET pin cannot override it since pin 1 is NC on the AT49BV001AN-55JI.
Can AT49BV001AN-55JI be used in place of AT49BV001A-55JI?
Yes, AT49BV001AN-55JI is a direct functional replacement for AT49BV001A-55JI in most applications, sharing identical timing (55 ns), voltage range (2.7–3.6 V), PLCC-32 packaging, and command set. The key difference is that the "N" suffix denotes NC RESET - so systems relying on RESET-driven boot block override must verify alternative protection methods. All other electrical and functional characteristics match.
What are the valid sector erase address ranges for AT49BV001AN-55JI?
For AT49BV001AN-55JI, sector erase addresses are: boot block = 00000H–03FFFH (16K), parameter block 1 = 04000H–05FFFH (8K), parameter block 2 = 06000H–07FFFH (8K), main memory block 1 = 08000H–0FFFFH (32K), and main memory block 2 = 10000H–1FFFFH (64K). Sector erase is initiated using the 6-cycle command with SA loaded on the sixth cycle's address bus.
Does AT49BV001AN-55JI support both DATA polling and toggle-bit status detection?
Yes, AT49BV001AN-55JI supports both methods: reading the last programmed byte returns its complement on I/O7 until programming completes (DATA polling), and I/O6 toggles between 0 and 1 during active program or erase cycles (toggle bit). Both features operate without external clocks or timers and can be polled at any time - enabling robust, interrupt-driven firmware update routines in the AT49BV001AN-55JI.
AT49BV001AN-55JI 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:
- 55 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)
AT49BV001AN-55JI FAQ
1.How can I place an order for AT49BV001AN-55JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001AN-55JI 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 AT49BV001AN-55JI reliable?
The price and inventory of AT49BV001AN-55JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001AN-55JI is usually 5 days.
3.What payment methods are accepted for AT49BV001AN-55JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001AN-55JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001AN-55JI?
AT49BV001AN-55JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001AN-55JI 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 AT49BV001AN-55JI?
For technical support, including AT49BV001AN-55JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001AN-55JI requirements.
6.How does Aetrix verify that AT49BV001AN-55JI is sourced from the original manufacturer or authorized distributors?
All AT49BV001AN-55JI 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 AT49BV001AN-55JI meets industry standards.
7.What is the process for return or replacement of AT49BV001AN-55JI?
All AT49BV001AN-55JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001AN-55JI, 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 AT49BV001AN-55JI part is unused and in its original packaging.
Return procedure for AT49BV001AN-55JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV001AN-55JI Tags
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