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Microchip Technology AT49BV001-90JC
- Part No.:
- AT49BV001-90JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV001-90JC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,490
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Product details
Overview
AT49BV001-90JC 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), and hardware data protection. It enables in-system reprogramming in embedded controllers and firmware storage applications requiring nonvolatile code retention and field-upgradable boot code.
For engineers reviewing the AT49BV001-90JC datasheet, AT49BV001-90JC pinout, AT49BV001-90JC application, or AT49BV001-90JC equivalent, key selection considerations include its PLCC-32 package, 90 ns access timing, boot block programming lockout feature, byte-programmable erase/program cycle compatibility, and 10,000 write endurance rating.
Technical Context
This device implements a standard parallel Flash interface with CE/OE/WE control logic, internal command register for software-controlled erase and program operations, and dual-line bus contention prevention via independent CE and OE enable. Its sector architecture supports selective erasure of parameter blocks (8 KB each) and main memory blocks (32 KB and 64 KB).
The AT49BV001-90JC uses Atmel's nonvolatile CMOS process to deliver 25 mA active current and 50 µA CMOS standby current at 3.3 V, with DATA polling and Toggle Bit methods for end-of-program/erase detection. The RESET pin supports both system reset and 12 V override of boot block lockout - a capability confirmed for the AT49BV001 series but not the N/T variants.
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 microcontrollers. |
| Supply Voltage | 2.7 V to 3.6 V - compatible with 3.3 V systems and battery-backed operation down to 2.7 V. |
| Read Access Time | 90 ns max - meets timing requirements for 10 MHz bus interfaces without wait states. |
| Byte Programming Time | 30 µs typical - enables fast field updates of small configuration or calibration data segments. |
| Erase Cycle Time | 10 seconds max for full chip erase - allows predictable firmware update windows in production test and field service. |
| Endurance | 10,000 program/erase cycles - sufficient for infrequent firmware upgrades over product lifetime. |
| Operating Temperature | 0°C to +70°C (Commercial) - validated for use in office, consumer, and industrial control environments. |
Pinout & Package
AT49BV001-90JC is supplied in a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package with gull-wing leads, pin 1 index marked by corner notch. Pin 1 is NC (No Connect) per datasheet specification for PLCC and DIP packages.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 required for accessing upper 64 KB block. |
| I/O0–I/O7 | Data Inputs/Outputs | 8-bit bidirectional data bus; high-impedance when CE or OE is high to prevent bus contention. |
| 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 sharing and reduce power during idle reads. |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-impedance outputs; 12 V input enables boot block override. |
| VCC | Power Supply | 2.7–3.6 V supply; internal voltage sensing inhibits programming if below 1.8 V (typical). |
| GND | Ground | Reference return path for all signals and power; decoupling capacitor required near VCC pin. |
| DC / NC | No Connect | Pin 1 (PLCC top view) is designated DC (Don't Connect); floating or tied to GND has no functional effect. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16 KB protected region (00000H–03FFFH) prevents accidental overwrite of bootloader code; enabled via 6-cycle command sequence. |
| Hardware Data Protection | VCC sense, noise filter (15 ns pulse rejection), and control-line inhibit (OE low/CE high/WE high) prevent spurious writes during power transients. |
| DATA Polling & Toggle Bit | Real-time status feedback: I/O7 complement indicates programming progress; I/O6 toggling confirms erase/program completion without external timers. |
| Sector Erase Flexibility | Independent erasure of two 8 KB parameter blocks and two main memory blocks (32 KB/64 KB) enables modular firmware partitioning. |
| 3-Volt-Only Command Set | No external 12 V programming voltage required; all operations executed using standard 3.3 V logic levels and software command sequences. |
Applications
| Industrial PLC Firmware Storage | Embedded Network Router Boot Code |
|---|---|
Use Scenario: Storing boot firmware and configuration parameters in programmable logic controllers operating in factory-floor environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Nonvolatile code storage with hardware write protection; 90 ns read access ensures deterministic boot timing under real-time OS constraints. Use Value: Boot block lockout prevents corruption of critical startup routines during field firmware updates, while sector erase allows safe parameter block reconfiguration without full reload. |
Use Scenario: Holding secure bootloader and recovery image in residential and enterprise network routers requiring remote firmware upgrades and rollback capability. IC Role / Device Role / Timing Role: Parallel Flash memory interfaced to MIPS or ARM host processor; 25 mA active current supports low-power sleep modes between upgrade cycles. Use Value: 10,000 write cycles and DATA polling enable reliable over-the-air (OTA) updates with verified completion, reducing risk of bricking during partial transfers. |
| Medical Diagnostic Device Calibration Data | Automotive Body Control Module (BCM) Configuration |
Use Scenario: Retaining calibrated sensor offsets and linearization tables in portable ultrasound or ECG units where recalibration occurs infrequently but must survive battery removal. IC Role / Device Role / Timing Role: Parameter block storage (two 8 KB sections) for field-serviceable calibration data; 50 µA standby current extends battery life in always-on monitoring mode. Use Value: Independent sector erase permits updating calibration tables without disturbing main application firmware, meeting IEC 62304 traceability requirements. |
Use Scenario: Storing vehicle-specific configuration maps (e.g., door lock behavior, lighting profiles) in BCMs subject to dealership-level personalization and recall campaigns. IC Role / Device Role / Timing Role: In-system reprogrammable Flash accessed via CAN-connected diagnostic tool; RESET pin 12 V override enables forced boot block reprogramming during service. Use Value: Sector architecture isolates configuration data from safety-critical application code, satisfying ISO 26262 ASIL-B partitioning guidelines for update integrity. |
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, timing, and PLCC-32 package; differs in boot block address map (1C000H–1FFFFH) and lacks RESET pin functionality for boot override. | Designed for systems where boot code resides in upper memory space and 12 V override is unnecessary. | Select when legacy layout uses upper-address boot region and system reset handling is managed externally. |
| AT49LV001-90JC | Narrower VCC range (3.0–3.6 V only); identical pinout, timing, and sector architecture; same 10,000-cycle endurance and 50 µA standby current. | Targeted at stable 3.3 V rail designs without battery-voltage tolerance requirement. | Choose for cost-sensitive commercial applications with regulated 3.3 V supplies and no need for 2.7 V operation. |
Compared with AT49BV001T-90JC and AT49LV001-90JC, the AT49BV001-90JC uniquely supports 2.7 V operation and retains full RESET-based boot block override - critical for field-serviceable automotive and industrial systems requiring guaranteed recovery paths.
Availability
AT49BV001-90JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded network router boot code, and medical diagnostic device calibration data requiring stable component supply across extended product lifecycles.
Supply support for AT49BV001-90JC 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 secure authentication devices for embedded systems.
The AT49BV001-90JC belongs to Atmel's Battery-Voltage™ Flash memory product line, designed specifically for 3 V–only systems needing robust in-system reprogrammability, hardware write protection, and long-term data retention in harsh environments.
FAQ
What is the memory organization of the AT49BV001-90JC?
The AT49BV001-90JC contains 1 Mbit of Flash memory organized as 131,072 words × 8 bits (128K × 8). Its sector architecture comprises one 16 KB boot block (00000H–03FFFH), two 8 KB parameter blocks, and two main memory blocks (32 KB and 64 KB). This structure enables selective erasure and programming for modular firmware updates in the AT49BV001-90JC.
Does the AT49BV001-90JC support 12 V programming voltage?
No, the AT49BV001-90JC is a 3-volt-only Flash memory device and does not require or accept 12 V for standard programming or erasure. However, applying 12 V ± 0.5 V to the RESET pin enables override of the boot block programming lockout feature - a distinct function separate from normal write operations. All command sequences for the AT49BV001-90JC execute using standard 2.7–3.6 V logic levels.
How is boot block protection enabled on the AT49BV001-90JC?
Boot block protection on the AT49BV001-90JC is enabled via a six-cycle software command sequence: load AAH to address 5555H, 55H to 2AAAH, 80H to 5555H, then AAH/55H/40H to 5555H/2AAAH/5555H. Once activated, the 16 KB boot block (00000H–03FFFH) becomes permanently write-protected at ≤5.5 V. The AT49BV001-90JC datasheet confirms this lockout persists until power cycle unless overridden with 12 V on RESET.
What package type is used for the AT49BV001-90JC?
The AT49BV001-90JC uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package (package code 32J), with gull-wing leads and a corner notch marking pin 1. Per the datasheet, pin 1 is designated "DC" (Don't Connect) and must remain unconnected. This PLCC variant supports socketed prototyping and rework-friendly assembly in the AT49BV001-90JC design flow.
Can the AT49BV001-90JC be used in industrial temperature applications?
The AT49BV001-90JC is rated for commercial temperature range (0°C to +70°C) only. For industrial operation (–40°C to +85°C), the equivalent part AT49BV001-90JI (same specifications, industrial-grade screening) must be selected. Using the AT49BV001-90JC outside its specified temperature range may result in timing violations, increased standby current, or failure to complete erase/program cycles reliably.
AT49BV001-90JC 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:
- 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)
AT49BV001-90JC FAQ
1.How can I place an order for AT49BV001-90JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001-90JC 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 AT49BV001-90JC reliable?
The price and inventory of AT49BV001-90JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001-90JC is usually 5 days.
3.What payment methods are accepted for AT49BV001-90JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001-90JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001-90JC?
AT49BV001-90JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001-90JC 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 AT49BV001-90JC?
For technical support, including AT49BV001-90JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001-90JC requirements.
6.How does Aetrix verify that AT49BV001-90JC is sourced from the original manufacturer or authorized distributors?
All AT49BV001-90JC 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 AT49BV001-90JC meets industry standards.
7.What is the process for return or replacement of AT49BV001-90JC?
All AT49BV001-90JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001-90JC, 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 AT49BV001-90JC part is unused and in its original packaging.
Return procedure for AT49BV001-90JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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