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Microchip Technology AT49BV001T-90VC
- Part No.:
- AT49BV001T-90VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49BV001T-90VC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,955
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Product details
Overview
AT49BV001T-90VC from Microchip Technology (formerly Atmel) is a 1 Mbit (128K × 8) single-supply 2.7–3.6 V in-system reprogrammable Flash memory with 90 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 is used for firmware storage and boot code retention in embedded microcontroller systems requiring nonvolatile, field-upgradable memory.
For engineers reviewing the AT49BV001T-90VC datasheet, AT49BV001T-90VC pinout, AT49BV001T-90VC application, or AT49BV001T-90VC equivalent, key selection criteria include boot block lockout capability (address range 1C000H–1FFFFH), 10,000 program/erase cycles, DC/AC operation over commercial temperature range (0°C to 70°C), and VSOP-32 (8 × 14 mm) package compatibility with space-constrained PCB layouts.
Technical Context
The AT49BV001T-90VC implements a command-register-based programming model using standard microprocessor timing, supporting byte-by-byte programming (30 µs typical), software-controlled sector erase (10 s max), and DATA polling or toggle-bit status detection. Its internal control logic handles erase timing autonomously without external clocks.
It features dual-line chip enable (CE) and output enable (OE) for bus contention avoidance, RESET pin support for system-level reset coordination (including 12 V override for boot block reprogramming), and hardware safeguards including VCC sense, noise filtering on WE/CE, and write inhibit conditions.
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. |
| Read Access Time | 90 ns - enables direct execution from flash (XIP) in systems with ≤11 MHz bus timing. |
| Supply Voltage | 2.7 V to 3.6 V - compatible with 3.3 V logic rails and battery-backed operation down to 2.7 V. |
| Program/Erase Endurance | 10,000 cycles - sufficient for field firmware updates across product lifecycle in industrial controllers. |
| Active Current | 25 mA - low enough for portable devices with duty-cycled firmware reads. |
| Standby Current | 50 µA CMOS - enables ultra-low-power sleep modes in always-on embedded systems. |
| Boot Block Size & Address | 16 KB (1C000H–1FFFFH) - isolates secure bootloader code from application updates. |
Pinout & Package
AT49BV001T-90VC is packaged in a 32-lead Plastic Very Small Outline Package (VSOP), 8 mm × 14 mm body, 0.5 mm lead pitch, JEDEC MO-207AA compliant. Pin 1 is located at bottom-left corner (marking dot adjacent), with pins numbered counter-clockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 required for accessing upper memory regions including boot block (1C000H–1FFFFH). |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface for read/write operations; supports true bidirectional data flow without external transceivers. |
| CE | Chip Enable | Active-low device select; when high, places outputs in high-impedance state - essential for multi-device bus sharing. |
| OE | Output Enable | Active-low read strobe; used with CE to prevent bus contention during partial decode or shared-memory configurations. |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming cycles. |
| RESET | Reset Input | Active-low system reset; 12 V input enables boot block override - critical for recovery firmware updates. |
| VCC | Power Supply | 2.7–3.6 V supply; internal regulation ensures stable core voltage across operating range. |
| GND | Ground | Reference for all I/O and internal circuitry; requires low-inductance connection to minimize noise during erase/program pulses. |
| NC | No Connect | Pin 31 (VSOP top view); must remain unconnected - floating or tied to GND/VCC may cause undefined behavior. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | Hardware-enforced write protection for 16 KB boot sector (1C000H–1FFFFH); prevents accidental overwrite of bootloader during application firmware updates. |
| Software Command Architecture | 6-byte unlock/erase/lock sequences (e.g., 5555H/2AAAH/80H) eliminate need for external high-voltage programmers - enables in-system reprogramming via MCU GPIO. |
| DATA Polling & Toggle Bit | Dual status reporting: I/O7 complement indicates program completion; I/O6 toggling signals active erase/program - eliminates need for fixed delay timers in host firmware. |
| Sector Erase Flexibility | Independent erasure of two 8 KB parameter blocks and two main memory blocks (32 KB + 64 KB) - allows selective update of configuration data without clearing entire firmware image. |
| Hardware Data Protection | VCC sense (inhibit below 1.8 V), noise filtering (<15 ns pulse rejection), and multi-signal write inhibit (CE high / OE low / WE high) prevent spurious writes during power transients or EMI events. |
Applications
| Industrial PLC Firmware Storage | Embedded Bootloader Memory |
|---|---|
|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile program memory providing XIP-capable instruction storage with 90 ns access for real-time scan-cycle execution. Use Value: Sector architecture enables field updates to logic programs without erasing boot loader or calibration data, reducing downtime during maintenance. |
Use Scenario: Holding secure boot code in microcontroller-based medical devices requiring certified firmware integrity. IC Role / Device Role / Timing Role: Protected boot memory with lockout-enabled 16 KB region (1C000H–1FFFFH) ensuring immutable startup sequence. Use Value: Hardware lockout prevents unauthorized modification of boot code; 12 V RESET override allows authorized recovery - meeting IEC 62304 safety requirements. |
| Consumer Electronics Configuration Storage | Automotive Body Control Module Memory |
|
Use Scenario: Retaining user preferences and calibration settings in smart home hubs operating from 3.3 V rails. IC Role / Device Role / Timing Role: Low-power (50 µA standby) parameter memory with dual 8 KB parameter blocks for versioned configuration storage. Use Value: Independent parameter block erasure allows safe rollback to previous settings without affecting main application firmware. |
Use Scenario: Storing diagnostic firmware and CAN protocol stacks in automotive body control modules with extended temperature tolerance. IC Role / Device Role / Timing Role: Industrial-grade (-40°C to +85°C) Flash memory supporting AEC-Q100-relevant reliability with 10,000-cycle endurance. Use Value: Fast 90 ns read access meets real-time CAN message processing deadlines; hardware write protection guards against ECU corruption during vehicle battery transients. |
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 | Same density (1 Mbit), 90 ns access, 3.0–3.6 V supply, but uses different command set and lacks boot block lockout override via RESET pin. | No 12 V boot block reprogramming path; requires full chip erase to modify protected region - unsuitable for secure recovery workflows. | Select only if boot block override is unnecessary and SST's JEDEC-compliant command set aligns with existing firmware drivers. |
| MX29LV001CTTI-90G | 1 Mbit, 90 ns, 3.0–3.6 V, includes CFI query mode and hardware write protect pin (WP#), but boot block is fixed at lower address (00000H–03FFFH), not relocated to 1C000H–1FFFFH. | Boot block location mismatch prevents drop-in replacement in designs relying on upper-address boot code placement per AT49BV001T-90VC layout. | Choose only when board layout reserves lower memory map for boot code and WP# pin usage is preferred over command-based lockout. |
Compared with SST39VF010-90-4C-NHE and MX29LV001CTTI-90G, the AT49BV001T-90VC uniquely combines relocatable boot block (1C000H–1FFFFH), 12 V RESET override, and Atmel's proven command-set compatibility - making it optimal for legacy MCU platforms requiring field-safe bootloader updates.
Availability
AT49BV001T-90VC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded bootloader memory, and automotive body control module memory requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for AT49BV001T-90VC 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
Microchip Technology acquired Atmel in 2016 and maintains full technical and manufacturing continuity for the AT49BV/LV series. The company specializes in microcontrollers, analog, and nonvolatile memory solutions for industrial, automotive, and consumer markets.
The AT49BV001T-90VC belongs to Atmel's Battery-Voltage™ Flash memory product line, designed specifically for reliable, low-voltage in-system reprogrammability in resource-constrained embedded systems where firmware integrity and field upgradeability are critical.
FAQ
What is the boot block address range for AT49BV001T-90VC?
The boot block for AT49BV001T-90VC occupies addresses 1C000H to 1FFFFH (16 KB), distinct from the base-address boot block used in non-T variants. This upper-memory placement isolates boot code from application updates and is confirmed in the "Notes" section of the datasheet (page 6, Note 2). The AT49BV001T-90VC's boot block lockout feature applies exclusively to this range.
Does AT49BV001T-90VC support 12 V programming override for the boot block?
Yes, AT49BV001T-90VC supports 12 V ± 0.5 V applied to the RESET pin during chip erase, sector erase, or byte programming to override the boot block programming lockout. This capability is explicitly documented in the "BOOT BLOCK PROGRAMMING LOCKOUT OVERRIDE" section (page 5) and is not available on N-suffix variants like AT49BV001N(T).
What package type does AT49BV001T-90VC use?
AT49BV001T-90VC uses a 32-lead Plastic Very Small Outline Package (VSOP), 8 mm × 14 mm body size, per ordering information table (page 18). This matches the "32V" package code and differs from PLCC (32J), PDIP (32P6), or TSOP (32T) variants - critical for footprint compatibility in compact PCB designs.
How many program/erase cycles is AT49BV001T-90VC rated for?
AT49BV001T-90VC is rated for a typical 10,000 program/erase cycles, as stated in the "Features" section (page 1) and confirmed under "Device Operation" (page 3). This endurance applies to all sectors including boot, parameter, and main memory blocks, and is validated across the commercial temperature range (0°C to 70°C).
Can AT49BV001T-90VC be used with 2.7 V supply voltage?
Yes, AT49BV001T-90VC operates across 2.7 V to 3.6 V, as specified in the "DC and AC Operating Range" table (page 7) under "AT49BV/LV001(N)(T)-90". This 2.7 V minimum enables compatibility with brown-out tolerant systems and battery-powered applications where supply may dip near 2.7 V during peak load.
AT49BV001T-90VC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.488", 12.40mm Width)
- Packaging:
- Tray
- 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-VSOP
AT49BV001T-90VC FAQ
1.How can I place an order for AT49BV001T-90VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001T-90VC 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 AT49BV001T-90VC reliable?
The price and inventory of AT49BV001T-90VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001T-90VC is usually 5 days.
3.What payment methods are accepted for AT49BV001T-90VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001T-90VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001T-90VC?
AT49BV001T-90VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001T-90VC 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 AT49BV001T-90VC?
For technical support, including AT49BV001T-90VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001T-90VC requirements.
6.How does Aetrix verify that AT49BV001T-90VC is sourced from the original manufacturer or authorized distributors?
All AT49BV001T-90VC 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 AT49BV001T-90VC meets industry standards.
7.What is the process for return or replacement of AT49BV001T-90VC?
All AT49BV001T-90VC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001T-90VC, 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 AT49BV001T-90VC part is unused and in its original packaging.
Return procedure for AT49BV001T-90VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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