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Microchip Technology AT49BV001NT-90JI
- Part No.:
- AT49BV001NT-90JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV001NT-90JI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49BV001NT-90JI from Atmel is a 1 Mbit (128K × 8) single-supply 2.7–3.6V in-system reprogrammable Flash memory with 90 ns read access time, sector-based architecture (16KB boot block + two 8KB parameter blocks + two main memory blocks), and hardware data protection. It supports byte-by-byte programming (30 µs/byte typical), chip/sector erase (10 s max), and operates across –40°C to +85°C for industrial embedded firmware storage.
For engineers reviewing the AT49BV001NT-90JI datasheet, AT49BV001NT-90JI pinout, AT49BV001NT-90JI application, or AT49BV001NT-90JI equivalent, key selection considerations include boot block lockout capability, RESET-pin-based override for reprogramming protected sectors, DATA polling/Toggle Bit end-of-operation detection, and compatibility with standard microprocessor bus timing (CE/OE/WE control).
Technical Context
The AT49BV001NT-90JI implements a command-register-based architecture requiring six-byte sequences for chip erase and sector erase, and four-byte sequences for byte programming. Its boot block (16KB, address range 1C000H–1FFFFH) supports permanent lockout via software command, with override enabled only when RESET is driven to 12 V ± 0.5 V - a feature absent in N(T) variants without 'T' suffix.
It uses standard EPROM-like read protocol (CE/OE low, WE high), supports TTL/CMOS-compatible inputs (VIH = 2.0 V, VIL = 0.6 V), and integrates hardware safeguards including VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and dual-line write inhibit (OE low or CE high blocks program cycles).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - sufficient for bootloader + configuration data in space-constrained microcontrollers. |
| Read Access Time | 90 ns maximum - enables direct execution from flash (XIP) in 10–12 MHz system buses without wait states. |
| Supply Voltage | 2.7 V to 3.6 V - compatible with 3.3 V logic systems and battery-powered designs down to 2.7 V. |
| Active Current | 25 mA typical - limits power budget impact during firmware updates or boot code fetch. |
| Standby Current | 50 µA CMOS - supports ultra-low-power sleep modes in portable or energy-harvesting devices. |
| Erase Cycle Time | 10 seconds maximum for full chip - allows field firmware recovery within defined maintenance windows. |
| Endurance | 10,000 program/erase cycles - meets industrial lifecycle requirements for infrequently updated configuration or calibration data. |
Pinout & Package
AT49BV001NT-90JI is supplied in a 32-lead PLCC (Plastic Leaded Chip Carrier) package with 1.27 mm pitch, suitable for surface-mount reflow assembly and socketed prototyping. Pin 1 is marked by corner notch; pins 1 and 9 are DC (Do Not Connect) for PLCC and TSOP packages respectively.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 selects upper/lower half of memory map. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface compatible with 8051, Z80, and ARM7 bus protocols; high-impedance on deselect. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access - prevents bus contention in multi-device systems. |
| OE | Output Enable | Active-low output control; used with CE to gate data output - enables shared bus arbitration without external logic. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence - critical for reliable command entry timing. |
| RESET* | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12 V input enables boot block override - unique to T-suffix variants. |
| VCC / GND | Power Supply | Single 2.7–3.6 V supply; decoupling required within 10 mm of pins to maintain <90 ns timing integrity. |
| DC / NC | No-Connect | Pins 1 (PLCC) and 9 (TSOP) are unconnected - must remain floating; PCB layout must avoid routing or solder mask openings. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16KB sector (1C000H–1FFFFH) permanently protected after command activation - ensures bootloader integrity against accidental overwrite. |
| RESET-Based Boot Override | Applying 12 V ± 0.5 V to RESET pin during erase/program restores write access to locked boot block - enables secure field recovery without device replacement. |
| DATA Polling & Toggle Bit | I/O7 complement indicates programming progress; I/O6 toggling signals active erase/program - eliminates need for external timers or status registers. |
| Sector-Erasable Architecture | Independent 8KB parameter blocks and 32KB/64KB main memory blocks - allows selective firmware updates without full chip erase. |
| Hardware Write Protection | VCC sense, noise filtering, and CE/OE/WE interlock prevent spurious writes - critical for reliability in electrically noisy industrial environments. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation lines with ambient temperatures up to 85°C. IC Role / Device Role / Timing Role: Nonvolatile code storage with 90 ns read access enabling deterministic boot timing and real-time task initialization. Use Value: Sector erase capability allows field-upgradable ladder logic without interrupting production; 10,000-cycle endurance supports 5+ years of scheduled firmware revisions. | Use Scenario: Hosting certified bootloader and safety-critical startup routines in FDA-regulated diagnostic equipment requiring immutable first-stage code. IC Role / Device Role / Timing Role: Secure boot memory with hardware-enforced boot block lockout preventing unauthorized modification of certified startup code. Use Value: RESET-driven 12 V override enables authorized service personnel to recover corrupted boot sectors - meeting IEC 62304 traceability and repair requirements. |
| Automotive ECU Calibration Data | Telecom Base Station Configuration |
Use Scenario: Retaining engine calibration maps and emission control parameters in automotive ECUs operating across –40°C to +85°C under vibration and EMI stress. IC Role / Device Role / Timing Role: Industrial-grade Flash providing stable 50 µA standby current and hardware noise immunity for always-on vehicle networks. Use Value: VCC sense and pulse filtering eliminate false writes during load-dump transients; parameter block isolation protects calibration from main firmware updates. | Use Scenario: Storing FPGA bitstreams and radio channel profiles in outdoor telecom base stations exposed to wide temperature swings and humidity. IC Role / Device Role / Timing Role: High-reliability Flash with 10-second chip erase enabling rapid remote reconfiguration during network maintenance windows. Use Value: Dual 8KB parameter blocks allow A/B versioning of radio profiles - enabling zero-downtime profile swaps via sector erase and reload. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF010-90-4C-NHE | 40 ns faster read (50 ns), same 1 Mbit density and 3.3 V supply, but lacks RESET-based boot override and uses different command set. | Higher performance read path suits XIP in faster MCUs; no 12 V override limits secure recovery options. | Select when speed > security; verify command compatibility before migration. |
| MX29LV010CTTI-90G | Same 90 ns timing and 2.7–3.6 V range, includes CFI compliance and 128-byte page programming - but boot block size is fixed at 16KB without lockout override. | CFI support simplifies auto-detection in generic programmers; no 12 V RESET override reduces field-service flexibility. | Select for standardized toolchain integration; accept reduced boot recovery capability. |
Compared with SST39VF010-90-4C-NHE and MX29LV010CTTI-90G, the AT49BV001NT-90JI uniquely combines industrial temperature rating, hardware boot lockout, and 12 V RESET override - making it optimal for safety-critical firmware storage where field recovery assurance is mandatory.
Availability
AT49BV001NT-90JI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloaders, automotive ECU calibration data, and telecom base station configuration requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AT49BV001NT-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 ICs for embedded systems.
The AT49BV/LV series was designed specifically for in-system reprogrammable firmware and configuration storage in industrial, automotive, and medical applications requiring robustness, sector-level erase granularity, and hardware-enforced data integrity.
FAQ
What is the boot block address range for AT49BV001NT-90JI?
The boot block for AT49BV001NT-90JI occupies addresses 1C000H to 1FFFFH (16 KB). This differs from non-T variants (e.g., AT49BV001N), which use 00000H–03FFFH. The T-suffix denotes top-boot architecture, placing the protected sector at the highest memory address - critical for correct linker script placement in bootloader development. AT49BV001NT-90JI's boot block location is fixed and cannot be remapped.
Does AT49BV001NT-90JI support 12 V programming voltage?
No, AT49BV001NT-90JI operates exclusively from a single 2.7–3.6 V supply for both read and write operations. The 12 V signal applies only to the RESET pin during boot block override - it does not power programming circuits or alter internal voltage generation. All command sequences, including byte programming and sector erase, execute at VCC levels. AT49BV001NT-90JI requires no external high-voltage generator.
How is the boot block lockout feature enabled on AT49BV001NT-90JI?
The boot block lockout on AT49BV001NT-90JI is enabled via a six-byte command sequence: write AAH to 5555H, 55H to 2AAAH, 80H to 5555H, AAH to 5555H, 55H to 2AAAH, then 40H to 5555H. After execution, reads from address 1C002H return high on I/O0, confirming activation. Once set, lockout persists until power cycle - and can only be overridden by applying 12 V to RESET during subsequent operations. AT49BV001NT-90JI does not support hardware reset-based deactivation.
What package type is used for AT49BV001NT-90JI?
AT49BV001NT-90JI uses a 32-lead Plastic Leaded Chip Carrier (PLCC) package, designated as 32J in Atmel's ordering nomenclature. It features a 1.27 mm lead pitch, J-shaped gull-wing leads, and a ceramic-filled plastic body rated for industrial temperature operation (–40°C to +85°C). Pin 1 is identified by a corner notch; pins 1 and 9 are DC (Do Not Connect) - PCB layout must leave them unconnected and un-routed.
Can AT49BV001NT-90JI be used in place of AT49BV001N-90JI?
No, AT49BV001NT-90JI is not a drop-in replacement for AT49BV001N-90JI due to architectural differences: the 'T' suffix indicates top-boot organization (boot block at 1C000H–1FFFFH) versus bottom-boot (00000H–03FFFH) in 'N' variants, and AT49BV001NT-90JI includes RESET-based boot override while AT49BV001N-90JI does not. Software command sequences differ, and memory map alignment affects linker configuration. Migration requires firmware and PCB review. AT49BV001NT-90JI must be selected intentionally for top-boot and override capability.
AT49BV001NT-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:
- 90 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)
AT49BV001NT-90JI FAQ
1.How can I place an order for AT49BV001NT-90JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001NT-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 AT49BV001NT-90JI reliable?
The price and inventory of AT49BV001NT-90JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001NT-90JI is usually 5 days.
3.What payment methods are accepted for AT49BV001NT-90JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001NT-90JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001NT-90JI?
AT49BV001NT-90JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001NT-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 AT49BV001NT-90JI?
For technical support, including AT49BV001NT-90JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001NT-90JI requirements.
6.How does Aetrix verify that AT49BV001NT-90JI is sourced from the original manufacturer or authorized distributors?
All AT49BV001NT-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 AT49BV001NT-90JI meets industry standards.
7.What is the process for return or replacement of AT49BV001NT-90JI?
All AT49BV001NT-90JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001NT-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 AT49BV001NT-90JI part is unused and in its original packaging.
Return procedure for AT49BV001NT-90JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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