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Microchip Technology AT49BV001NT-12JC
- Part No.:
- AT49BV001NT-12JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV001NT-12JC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,468
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Product details
Overview
AT49BV001NT-12JC from Atmel is a 1 Mbit (128K × 8) single-supply 2.7–3.6 V in-system reprogrammable Flash memory with 120 ns read access time, sector-based architecture (16 KB boot block + two 8 KB parameter blocks + two main memory blocks), and hardware data protection. It supports byte-by-byte programming (50 µs typical), chip/sector erase (10 s max), and DATA polling for end-of-program detection - used in embedded firmware storage for industrial controllers and legacy BIOS modules.
For engineers reviewing the AT49BV001NT-12JC datasheet, AT49BV001NT-12JC pinout, AT49BV001NT-12JC application, or AT49BV001NT-12JC equivalent, key selection considerations include its PLCC-32 package, boot block lockout capability (address range 1C000H–1FFFFH), 10,000 write cycles endurance, and compatibility with standard microprocessor bus timing (CE/OE/WE control).
Technical Context
The AT49BV001NT-12JC implements a command-register-based architecture requiring six-byte sequences for chip erase and sector erase, and four-byte sequences for byte programming. Its internal logic handles voltage generation and timing without external high-voltage inputs, enabling true 3V-only operation.
It features dual-level hardware protection: VCC sense inhibits programming below 1.8 V, and noise filtering rejects sub-15 ns pulses on CE/WE. The RESET pin supports boot block override at 12 V (not available on N(T) variants), but AT49BV001NT-12JC excludes this function per datasheet note.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - fits full boot code + configuration data in legacy 8-bit systems. |
| Read Access Time | 120 ns maximum - meets timing for 8 MHz Z80/8086-compatible buses with standard wait-state logic. |
| Supply Voltage | 2.7 V to 3.6 V - compatible with battery-backed or low-voltage industrial power rails, no 5 V required. |
| Write Endurance | 10,000 program/erase cycles - sufficient for field firmware updates over 5+ years in maintenance-critical equipment. |
| Standby Current | 50 µA CMOS - enables ultra-low-power retention in always-on monitoring subsystems. |
| Erase Time | 10 seconds maximum for full chip erase - predictable latency for automated reprogramming sequences. |
| Boot Block Size | 16 KB (1C000H–1FFFFH) with programmable lockout - isolates secure bootloader from user-modifiable application sectors. |
Pinout & Package
AT49BV001NT-12JC uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package with 1.27 mm lead pitch and body size 11.43 mm × 13.97 mm. Pin 1 is index corner; pin 9 is NC (no connect) per datasheet Figure 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 enables access beyond 64K boundary. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface compatible with 8086/8051-style data transfers; high-impedance when deselected. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access - prevents bus contention. |
| OE | Output Enable | Active-low output gate; controls data assertion independently of CE - enables memory-mapped I/O sharing. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence timing. |
| RESET | Reset Input | Active-low system reset; forces outputs to high-Z and halts ongoing operations - not used for boot override in NT variant. |
| VCC / GND | Power Supply | Single 2.7–3.6 V supply; decoupling required within 1 cm due to 25 mA active current and fast edge rates. |
| DC / NC | No Connect | Pin 9 (DC) is unconnected; must be left floating - no tie-high/tie-low or routing required. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Flexibility | Independent erasure of two 8 KB parameter blocks and two main memory blocks (32 KB + 64 KB) enables modular firmware updates without full reflash. |
| Boot Block Lockout | Hardware-enforced write protection for 16 KB boot sector (1C000H–1FFFFH); once enabled, prevents accidental corruption of bootloader code. |
| DATA Polling Detection | I/O7 complements last programmed byte during write cycle - allows real-time polling without status registers or extra pins. |
| Toggle Bit Feedback | I/O6 toggles during erase/program - provides asynchronous completion signal usable with any address, simplifying interrupt-driven firmware. |
| Hardware Write Inhibit | VCC sense, noise filtering, and CE/OE/WE state checking prevent spurious writes - eliminates need for external write-protect logic in noisy environments. |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded BIOS Modules |
|---|---|
Use Scenario: Storing ladder logic firmware and I/O configuration tables in programmable logic controllers operating in factory-floor environments with wide temperature swings and EMI. IC Role / Device Role / Timing Role: Nonvolatile program memory mapped to CPU address space; accessed via standard CE/OE/WE timing with 120 ns tACC. Use Value: Boot block lockout ensures bootloader integrity across 10,000 field updates; 50 µA standby current extends uptime during brownout conditions. | Use Scenario: Holding BIOS initialization code and hardware abstraction layer in x86-compatible industrial motherboards where 5 V legacy support is phased out. IC Role / Device Role / Timing Role: Drop-in replacement for EPROMs in 8-bit data bus systems; operates at same timing as 27C010 but with in-system reprogrammability. Use Value: Eliminates UV-eraser dependency and socket wear; sector architecture allows patching device drivers without reflashing entire BIOS image. |
| Medical Device Configuration Memory | Telecom Line Card Bootloader |
Use Scenario: Retaining calibration constants, safety thresholds, and user preferences in Class II medical instruments requiring traceable firmware revision control. IC Role / Device Role / Timing Role: Secure nonvolatile storage with hardware lockout; boot block holds FDA-auditable startup routines. Use Value: 10,000-cycle endurance supports lifetime recalibration; DATA polling enables deterministic update timing for regulatory test logging. | Use Scenario: Hosting boot code and FPGA configuration bitstreams on carrier-grade line cards where field upgrades must avoid service interruption. IC Role / Device Role / Timing Role: Primary boot memory accessed at power-on reset; sector erase permits concurrent update of application and config partitions. Use Value: 16 KB protected boot block prevents bricking during partial reflash; 2.7–3.6 V operation matches telecom -48 V DC/DC converter outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49BV001T-12JC | No boot block lockout override via RESET pin; identical timing, voltage, and pinout. | Lacks 12 V RESET override - unsuitable where field recovery of locked boot block is required. | Select AT49BV001T-12JC only if boot block lockout is never disabled post-deployment. |
| SST39VF010-120-4C-NHE | 40 ns faster read (80 ns vs. 120 ns); 3.3 V only (3.0–3.6 V); same 1 Mbit density and PLCC-32 package. | Higher performance for real-time systems; lacks boot block lockout - requires software-managed protection. | Choose SST39VF010-120-4C-NHE when speed > protection, and firmware integrity is enforced by host MCU. |
Compared with AT49BV001T-12JC, the AT49BV001NT-12JC adds boot block lockout detection via software ID mode (read 1C002H), while SST39VF010-120-4C-NHE trades lockout for faster access and tighter VCC tolerance - making AT49BV001NT-12JC optimal for safety-critical legacy platforms needing hardware-enforced boot integrity.
Availability
AT49BV001NT-12JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded BIOS modules, medical device configuration memory, and telecom line card bootloader applications requiring stable component supply and long-term obsolescence management.
Supply support for AT49BV001NT-12JC 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 industrial and automotive markets.
The AT49BV/LV series was designed for in-system reprogrammable nonvolatile storage in resource-constrained 8-bit and 16-bit embedded systems, emphasizing hardware data protection and sector-level flexibility over raw speed.
FAQ
What is the boot block address range for AT49BV001NT-12JC?
The boot block for AT49BV001NT-12JC occupies address range 1C000H to 1FFFFH (16 KB). This differs from non-T variants (00000H–03FFFH) and is confirmed in the datasheet's "Notes" section and sector map. The AT49BV001NT-12JC uses the T-series memory map, and its boot block lockout feature applies exclusively to this region.
Does AT49BV001NT-12JC support 12 V RESET override for boot block reprogramming?
No, AT49BV001NT-12JC does not support 12 V RESET override. The datasheet explicitly states "RESET feature is not available on the AT49BV/LV001N(T)" and confirms the RESET pin is DC (don't connect) on N(T) variants. Therefore, once boot block lockout is enabled on AT49BV001NT-12JC, it cannot be disabled - design must account for permanent protection.
What package type is used by AT49BV001NT-12JC?
AT49BV001NT-12JC uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package, designated as "32J" in Atmel's ordering information. The datasheet specifies pin 1 as index corner and pin 9 as NC (no connect), consistent across all PLCC variants of the AT49BV001N(T) family.
How many program/erase cycles is AT49BV001NT-12JC rated for?
AT49BV001NT-12JC is rated for a minimum of 10,000 program/erase cycles, as stated in the "Features" section and confirmed in the "Device Operation" text. This endurance applies to all sectors including boot, parameter, and main memory blocks under specified VCC and temperature conditions.
Can AT49BV001NT-12JC be used as a direct replacement for AT29BV010?
No, AT49BV001NT-12JC is not a direct replacement for AT29BV010. While both are 1 Mbit 3V Flash devices, AT29BV010 uses a different command set, lacks sector architecture (uniform 64 KB erase), and has distinct timing parameters (e.g., 90 ns access). Interchange requires validation of command compatibility, timing margins, and lockout behavior - AT49BV001NT-12JC must be integrated using its documented command sequences.
AT49BV001NT-12JC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT49BV001NT-12JC FAQ
1.How can I place an order for AT49BV001NT-12JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001NT-12JC 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-12JC reliable?
The price and inventory of AT49BV001NT-12JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001NT-12JC is usually 5 days.
3.What payment methods are accepted for AT49BV001NT-12JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001NT-12JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001NT-12JC?
AT49BV001NT-12JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001NT-12JC 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-12JC?
For technical support, including AT49BV001NT-12JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001NT-12JC requirements.
6.How does Aetrix verify that AT49BV001NT-12JC is sourced from the original manufacturer or authorized distributors?
All AT49BV001NT-12JC 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-12JC meets industry standards.
7.What is the process for return or replacement of AT49BV001NT-12JC?
All AT49BV001NT-12JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001NT-12JC, 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-12JC part is unused and in its original packaging.
Return procedure for AT49BV001NT-12JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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