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Microchip Technology AT49BV001NT-90JC
- Part No.:
- AT49BV001NT-90JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV001NT-90JC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,978
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Product details
Overview
AT49BV001NT-90JC from Atmel is a 1 Mbit (128K × 8) single-supply 2.7–3.6 V Flash memory IC with 70 ns read access time, sector-based architecture (16 KB boot block + two 8 KB parameter blocks + two main memory blocks), hardware data protection, and DATA polling for program completion detection. It serves as nonvolatile storage for firmware boot code and configuration data in embedded microcontroller systems.
For engineers reviewing the AT49BV001NT-90JC datasheet, AT49BV001NT-90JC pinout, AT49BV001NT-90JC application, or AT49BV001NT-90JC equivalent, key selection considerations include its PLCC-32 package, 90 ns erase cycle timing, boot block programming lockout feature, and compatibility with standard microprocessor bus interfaces using CE/OE/WE control.
Technical Context
The AT49BV001NT-90JC implements a command-register-based architecture requiring six-byte software sequences for chip/sector erase and boot lockout enable. Its sector erase supports independent erasure of parameter blocks (8 KB each) and main memory blocks (32 KB and 64 KB), with boot block address range fixed at 1C000H–1FFFFH.
It uses standard EPROM-like read timing with dual-line CE/OE control to prevent bus contention, and supports both DATA polling (I/O7 complement toggle) and Toggle Bit (I/O6) methods for detecting program/erase completion. RESET pin functionality is disabled on this N(T) variant - no reset-driven boot override capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits |
| Supply Voltage | 2.7–3.6 V - enables direct battery-voltage operation without level-shifting |
| Read Access Time | 90 ns - determines maximum sustained read throughput in microprocessor bus cycles |
| Erase Cycle Time | 10 seconds - defines minimum latency for full-chip or sector reprogramming |
| Byte Programming Time | 30 µs typical - sets write granularity and firmware update overhead per byte |
| Endurance | 10,000 write/erase cycles - specifies field lifetime under frequent firmware updates |
| Standby Current | 50 µA CMOS - enables low-power retention in always-on embedded systems |
Pinout & Package
AT49BV001NT-90JC is housed in a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package with gull-wing leads, compatible with standard surface-mount reflow profiles and socketed programming fixtures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing (A0–A16) |
| I/O0–I/O7 | Data Inputs/Outputs | 8-bit bidirectional data bus; latched on rising edge of WE/CE during programming |
| 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 manage bus contention during reads |
| WE | Write Enable | Active-low write strobe; initiates command latching and byte programming cycles |
| RESET | Reset Input | DC-connected (no reset function); not usable for boot override on NT variants |
| VCC | Power Supply | 2.7–3.6 V primary supply; powers core logic and I/O buffers |
| GND | Ground | Reference return path for all digital and analog circuitry |
| NC / DC | No Connect / Don't Connect | Unbonded pins (PLCC pin 1, DIP/TSOP pin 9); must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16 KB protected region (1C000H–1FFFFH) prevents accidental overwrite of critical boot firmware |
| Sector Erase Flexibility | Independent erasure of two 8 KB parameter blocks and two main memory blocks (32 KB + 64 KB) enables modular firmware updates |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibition prevent spurious writes |
| DATA Polling & Toggle Bit | Dual real-time status reporting (I/O7 complement, I/O6 toggle) eliminates need for fixed delay timers during programming |
| Single 2.7–3.6 V Operation | Eliminates need for 5 V or 12 V programming supplies - simplifies power design and PCB layout |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing immutable bootloader and safety-critical initialization routines in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing deterministic startup sequence execution upon power-up or reset. Use Value: Boot block lockout ensures bootloader integrity across 10,000+ field updates; 50 µA standby current extends uptime in battery-backed modules. | Use Scenario: Holding certified firmware images and calibration data in portable diagnostic equipment requiring regulatory-compliant data retention. IC Role / Device Role / Timing Role: Secure configuration and firmware storage with hardware-level write protection against unintended modification. Use Value: Sector architecture allows safe field updates of application firmware without risking bootloader corruption; 2.7 V min supply supports wide-input medical power rails. |
| Automotive Body Control Module | Networking Equipment Parameter Storage |
Use Scenario: Storing vehicle-specific configuration tables and CAN node initialization parameters in body control units exposed to automotive temperature ranges. IC Role / Device Role / Timing Role: Temperature-rated (–40°C to +85°C) Flash memory interfacing directly with 8-bit microcontrollers via parallel bus. Use Value: 90 ns read access meets real-time response requirements; industrial-grade endurance supports 15-year vehicle lifecycle updates. | Use Scenario: Retaining MAC addresses, PHY settings, and firmware patch metadata in Ethernet switches and routers undergoing remote firmware upgrades. IC Role / Device Role / Timing Role: Parameter block storage enabling atomic updates of network configuration without disrupting active traffic. Use Value: Two independent 8 KB parameter blocks allow A/B versioning; DATA polling enables precise timing control during OTA update sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49BV001T-90JC | Same density, speed, and PLCC-32 package; includes functional RESET pin for boot override | Enables recovery from corrupted boot block via 12 V RESET pulse - required where field-recoverability is mandatory | Select when boot block reprogrammability after lockout is essential; otherwise AT49BV001NT-90JC offers simpler reset handling |
| SST39VF010-90-4C-NHE | 1 Mbit, 90 ns, 3.0–3.6 V; different command set and sector map (32 × 4 KB), no boot lockout | Lacks dedicated boot block protection; requires external logic or firmware for secure bootloader isolation | Choose for cost-sensitive designs where boot security is managed in software; verify timing compatibility with existing CE/OE/WE interface |
Compared with AT49BV001T-90JC, the AT49BV001NT-90JC removes RESET functionality to simplify system reset architecture but forfeits hardware-based boot recovery. Against SST39VF010, it trades sector flexibility for stronger built-in boot integrity - critical in safety-certified systems.
Availability
AT49BV001NT-90JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, and automotive body control module applications requiring stable component supply over extended production lifecycles.
Supply support for AT49BV001NT-90JC 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 mixed-signal ICs for embedded systems.
The AT49BV/LV series was designed as cost-effective, single-supply Flash memory for in-system reprogrammability in resource-constrained 8-bit and 16-bit microcontroller platforms - emphasizing reliability, low voltage operation, and sector-level update flexibility.
FAQ
What is the boot block address range for AT49BV001NT-90JC?
The boot block address range for AT49BV001NT-90JC is 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 region at the highest memory addresses - a key detail for linker script and firmware partitioning in AT49BV001NT-90JC implementations.
Does AT49BV001NT-90JC support hardware reset-driven boot block override?
No, AT49BV001NT-90JC does not support hardware reset-driven boot block override. The RESET pin is DC-connected (not functional) on all N(T) variants, including AT49BV001NT-90JC. Unlike the T-only version (AT49BV001T-90JC), this part lacks the 12 V RESET override capability - once boot lockout is enabled, only full chip erase (with lockout disabled) can restore write access to the boot block.
What package type is used for AT49BV001NT-90JC?
AT49BV001NT-90JC uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package, designated as 32J in Atmel's ordering nomenclature. This surface-mount package features gull-wing leads, is RoHS-compliant, and supports standard reflow soldering profiles - making it suitable for automated assembly in industrial and medical electronics manufacturing.
How does the sector architecture of AT49BV001NT-90JC support firmware updates?
The AT49BV001NT-90JC sector architecture - one 16 KB boot block, two 8 KB parameter blocks, and two main memory blocks (32 KB and 64 KB) - enables atomic, non-disruptive firmware updates. Critical boot code remains isolated in the locked boot block while application firmware resides in main memory blocks, and configuration data is stored in parameter blocks - allowing independent erasure and reprogramming without risking system startup integrity in AT49BV001NT-90JC deployments.
What is the maximum erase time for a full chip erase on AT49BV001NT-90JC?
The maximum erase time for a full chip erase on AT49BV001NT-90JC is 10 seconds, as specified in the datasheet under tEC (Erase Cycle Time). This applies when the boot block lockout is disabled; if enabled, chip erase affects only parameter blocks and main memory blocks (excluding the boot block), but the 10-second timing remains unchanged. This value is characterized, not 100% tested, and represents worst-case timing for AT49BV001NT-90JC under commercial temperature conditions.
AT49BV001NT-90JC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT49BV001NT-90JC FAQ
1.How can I place an order for AT49BV001NT-90JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001NT-90JC 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-90JC reliable?
The price and inventory of AT49BV001NT-90JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001NT-90JC is usually 5 days.
3.What payment methods are accepted for AT49BV001NT-90JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001NT-90JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001NT-90JC?
AT49BV001NT-90JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001NT-90JC 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-90JC?
For technical support, including AT49BV001NT-90JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001NT-90JC requirements.
6.How does Aetrix verify that AT49BV001NT-90JC is sourced from the original manufacturer or authorized distributors?
All AT49BV001NT-90JC 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-90JC meets industry standards.
7.What is the process for return or replacement of AT49BV001NT-90JC?
All AT49BV001NT-90JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001NT-90JC, 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-90JC part is unused and in its original packaging.
Return procedure for AT49BV001NT-90JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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