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Microchip Technology AT49BV001-90JI
- Part No.:
- AT49BV001-90JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV001-90JI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,193
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Product details
Overview
AT49BV001-90JI from Atmel is a 1 Mbit (128K × 8) single-supply 2.7–3.6 V in-system reprogrammable Flash memory IC used for nonvolatile code/data storage in embedded microcontroller systems. It delivers 70 ns read access time, supports sector-based erase (boot, parameter, and main memory blocks), features hardware data protection, and operates across –40°C to +85°C industrial temperature range.
For engineers reviewing the AT49BV001-90JI datasheet, AT49BV001-90JI pinout, AT49BV001-90JI application, or AT49BV001-90JI equivalent, key selection considerations include its 32-pin PLCC package, boot block programming lockout capability, 10,000 write/erase cycles, DATA polling and toggle bit status detection, and compatibility with standard microprocessor bus timing.
Technical Context
The AT49BV001-90JI implements a sector-architected Flash array with one 16-Kbyte boot block (address 00000H–03FFFH), two 8-Kbyte parameter blocks, and two main memory blocks (32K and 64K bytes). Its command interface uses standard CE/OE/WE control lines and requires no high-voltage programming inputs.
It supports byte-by-byte programming (30 µs typical), software-controlled chip or sector erase (10 s max), and dual status verification methods-DATA polling on I/O7 and toggle bit on I/O6-to detect operation completion without external timing dependencies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits |
| Supply Voltage | 2.7 V to 3.6 V - enables direct battery-powered operation without level-shifting |
| Read Access Time | 90 ns - determines maximum sustained read throughput in CPU bus interfaces |
| Byte Programming Time | 30 µs typical - defines minimum interval between successive byte writes |
| Erase Cycle Time | 10 seconds max - sets worst-case latency for full-chip or sector reinitialization |
| Endurance | 10,000 program/erase cycles - specifies guaranteed rewrite lifetime before wear-out |
| Operating Temperature | –40°C to +85°C - qualifies for industrial-grade embedded control and instrumentation |
Pinout & Package
AT49BV001-90JI is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package with J-leads. Pin 1 is index corner; pin 32 is VCC. Pins 1 and 9 are NC (no connect) per datasheet Note on page 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing space |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface compatible with 8-bit microcontrollers and bus controllers |
| 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 gate; controls data bus tristate to prevent contention during shared-bus operation |
| WE | Write Enable | Active-low write strobe; latches address and data during programming/erase command sequences |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces outputs to high-impedance state |
| VCC | Power Supply | Primary 2.7–3.6 V supply; powers core logic and memory array |
| GND | Ground | Reference return path for all digital and analog circuitry |
| DC / NC | No Connect | Pins 1 and 9 - must remain unconnected per datasheet; not internally bonded |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16-Kbyte protected region (00000H–03FFFH) prevents accidental overwrite of boot code via software command |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line gating prevent spurious writes |
| DATA Polling & Toggle Bit | Real-time status feedback via I/O7 complement or I/O6 toggling eliminates need for fixed delay timers in firmware |
| Sector Erase Architecture | Independent erasure of boot, parameter, and main memory blocks enables selective firmware updates without full chip erase |
| Single 3-V Supply Operation | Eliminates requirement for 5-V or 12-V programming voltages - simplifies power design and PCB layout |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
Use Scenario: Storing firmware and configuration data in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; provides deterministic 90 ns read access for real-time instruction fetch. Use Value: Enables field firmware upgrades without hardware replacement; boot block lockout ensures critical startup routines remain intact during updates. | Use Scenario: Holding certified boot loader and safety-critical initialization routines in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant nonvolatile memory for regulatory-compliant device boot sequence. Use Value: 10,000-cycle endurance and industrial temperature rating ensure long-term reliability; hardware protection prevents corruption during power transients. |
| Automotive Body Control Module | Telecom Edge Node Configuration |
Use Scenario: Storing calibration tables and feature-enable flags in automotive body control units operating under wide thermal and electrical stress. IC Role / Device Role / Timing Role: Parameter block storage for runtime-configurable settings; accessed via standard microcontroller bus with CE/OE/WE control. Use Value: Two independent 8-Kbyte parameter blocks allow A/B versioning and safe over-the-air update rollback capability. | Use Scenario: Maintaining network configuration profiles and protocol stack parameters in remote telecom infrastructure nodes. IC Role / Device Role / Timing Role: Sector-erasable Flash memory supporting frequent parameter updates while preserving operational firmware in boot block. Use Value: 32-pin PLCC package offers mechanical robustness for vibration-prone deployments; 2.7–3.6 V operation matches common telecom power rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49BV001-90JC | Same die and timing, but PLCC package rated for commercial (0°C to +70°C) temperature range | Lacks industrial-grade thermal margin; unsuitable for extended ambient or under-hood use | Select AT49BV001-90JI when operating environment exceeds +70°C or falls below 0°C |
| SST39VF010-90-4C-NHE | 1 Mbit Flash with 90 ns access, 3.0–3.6 V supply, but uses different command set and lacks boot block lockout | No hardware-enforced boot sector protection; requires firmware-level safeguards for secure boot | Choose only if legacy SST39VF010 footprint compatibility is required and boot security is managed externally |
Compared with AT49BV001-90JC, the AT49BV001-90JI guarantees operation down to –40°C and up to +85°C, making it suitable for harsh environments; compared with SST39VF010-90-4C-NHE, it provides integrated boot block lockout and Atmel's proven command architecture, reducing firmware validation effort.
Availability
AT49BV001-90JI is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, automotive body electronics, and telecom infrastructure requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT49BV001-90JI 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 embedded applications.
The AT49BV series was designed as cost-effective, single-supply Flash memory for code storage in resource-constrained 8-bit and 16-bit microcontroller systems requiring field-upgradable firmware and industrial-grade reliability.
FAQ
What is the memory organization of the AT49BV001-90JI?
The AT49BV001-90JI contains 1 Mbit of Flash memory organized as 131,072 words × 8 bits (128K × 8). It is divided into a 16-Kbyte boot block (00000H–03FFFH), two 8-Kbyte parameter blocks, and two main memory blocks (32K and 64K bytes). This sector architecture enables selective erase and programming, and the AT49BV001-90JI supports both chip-wide and sector-specific erase commands.
Does the AT49BV001-90JI support hardware reset during active programming?
Yes, the AT49BV001-90JI features an active-low RESET pin that halts ongoing program or erase operations and places outputs in high-impedance state. However, if RESET transitions low mid-operation, the operation may fail and must be repeated after RESET returns high. The AT49BV001-90JI does not support automatic resume; firmware must reissue the full command sequence after reset recovery.
How is boot block protection enabled on the AT49BV001-90JI?
Boot block protection on the AT49BV001-90JI is enabled via a six-cycle software command sequence: load AAH to 5555H, 55H to 2AAAH, 80H to 5555H, then AAH/55H/40H to 5555H/2AAAH/5555H. Once activated, the 16-Kbyte boot block (00000H–03FFFH) becomes permanently write-protected at ≤5.5 V. The AT49BV001-90JI datasheet confirms this behavior applies to the "(N)" variant family including this part.
What package type is used for the AT49BV001-90JI?
The AT49BV001-90JI uses a 32-lead Plastic Leaded Chip Carrier (PLCC) package (package code 32J). It has J-shaped leads, measures 11.43 mm × 13.97 mm, and features pin 1 as the index corner. Pins 1 and 9 are explicitly designated as "no connect" (NC) per the AT49BV001-90JI datasheet, and must remain unconnected on the PCB.
Can the AT49BV001-90JI be used with a 5-V microcontroller bus?
No - the AT49BV001-90JI is a 3-V-only device with absolute maximum input voltage of 6.25 V, but its DC input thresholds (VIL = 0.6 V, VIH = 2.0 V) and AC timing are specified for 2.7–3.6 V operation. Direct connection to a 5-V bus risks violating VIH/VIL margins and may cause unreliable reads/writes. Level translation or a 3.3-V-compatible microcontroller is required for safe integration with the AT49BV001-90JI.
AT49BV001-90JI 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)
AT49BV001-90JI FAQ
1.How can I place an order for AT49BV001-90JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001-90JI 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 AT49BV001-90JI reliable?
The price and inventory of AT49BV001-90JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001-90JI is usually 5 days.
3.What payment methods are accepted for AT49BV001-90JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001-90JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001-90JI?
AT49BV001-90JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001-90JI 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 AT49BV001-90JI?
For technical support, including AT49BV001-90JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001-90JI requirements.
6.How does Aetrix verify that AT49BV001-90JI is sourced from the original manufacturer or authorized distributors?
All AT49BV001-90JI 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 AT49BV001-90JI meets industry standards.
7.What is the process for return or replacement of AT49BV001-90JI?
All AT49BV001-90JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001-90JI, 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 AT49BV001-90JI part is unused and in its original packaging.
Return procedure for AT49BV001-90JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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