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Microchip Technology AT49BV001-90TC
- Part No.:
- AT49BV001-90TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV001-90TC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,090
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Product details
Overview
AT49BV001-90TC from Microchip Technology (formerly Atmel) is a 1 Mbit (128K × 8) single-supply 3V-only Flash memory IC used for nonvolatile program/data storage in embedded microcontroller systems. It features 70 ns read access time, 10-second chip erase, byte-programmable architecture with sector protection, and operates across 0°C to 70°C commercial temperature range in TSOP-32 package.
For engineers reviewing the AT49BV001-90TC datasheet, AT49BV001-90TC pinout, AT49BV001-90TC application, or AT49BV001-90TC equivalent, key selection criteria include its 2.7–3.6 V supply compatibility, boot block programming lockout capability, DATA polling/Toggle Bit end-of-write detection, and TSOP-32 footprint suitability for space-constrained PCB layouts.
Technical Context
The AT49BV001-90TC implements a standard parallel Flash interface with CE/OE/WE control logic and supports hardware reset-based boot block reprogramming override at 12 V. Its internal command register executes software-controlled erase and program operations without external high-voltage circuitry.
Memory organization includes one 16-Kbyte boot block (address 1C000H–1FFFFH), two 8-Kbyte parameter blocks, and two main memory blocks (32K and 64K bytes). Sector erase and chip erase are both supported, with hardware data protection via VCC sense, noise filtering, and input-level inhibition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8 bits) - provides sufficient code storage for mid-complexity 8/16-bit MCU boot firmware and configuration data. |
| Read Access Time | 90 ns - enables direct execution from flash (XIP) in systems with ≤11 MHz bus timing budgets. |
| Supply Voltage | 2.7 V to 3.6 V - compatible with 3.3 V system rails and battery-backed operation down to 2.7 V. |
| Byte Programming Time | 30 µs typical - allows rapid field updates of small firmware patches without long write stalls. |
| Erase Cycle Time | 10 seconds max - supports full-chip or sector-level reprogramming during manufacturing or field service. |
| End-of-Write Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delay timers in host firmware. |
| Write Endurance | 10,000 cycles - suitable for infrequent firmware upgrades or parameter logging in industrial controllers. |
Pinout & Package
AT49BV001-90TC is packaged in a 32-lead Plastic Thin Small Outline Package (TSOP, Type 1, 8 × 20 mm), pin-compatible with industry-standard 32-pin parallel Flash footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 selects upper/lower 64K region. |
| I/O0–I/O7 | Data Inputs/Outputs | Bi-directional 8-bit data bus; latched on WE/CE edges per standard microprocessor timing. |
| 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 prevent bus contention during shared-memory access. |
| WE | Write Enable | Active-low write strobe; initiates command sequences and byte programming when CE is low. |
| RESET | Hardware Reset | Active-low reset; halts ongoing operations and forces high-Z outputs; 12 V input enables boot block override. |
| VCC | Power Supply | 2.7–3.6 V core supply; internal regulation ensures stable programming voltage across range. |
| GND | Ground | Reference for all I/O and power pins; requires low-impedance PCB return path for noise immunity. |
| NC | No Connect | Pin 16 in TSOP package - must remain unconnected per datasheet; not usable as spare I/O. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16-Kbyte protected region (1C000H–1FFFFH) prevents accidental overwrite of critical boot code; enabled via 6-byte command sequence. |
| Software-Controlled Erase | Chip and sector erase initiated by 6-cycle command sequences - no external high-voltage generator required. |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulse rejection), and control-line inhibition (OE low/CE high/WE high blocks writes). |
| Two End-of-Write Detection Methods | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) provide flexible, deterministic write completion signaling. |
| 12 V RESET Override | Applying 12 V ± 0.5 V to RESET pin during erase/program temporarily disables boot block lockout - enables recovery of corrupted boot sectors. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing firmware images and calibration tables in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast read access for XIP execution and secure boot block for bootloader integrity. Use Value: Boot block lockout prevents unauthorized modification of safety-critical startup routines; 10,000-cycle endurance supports lifetime field updates. | Use Scenario: Retaining device-specific calibration parameters and regulatory-compliant configuration profiles in portable diagnostic equipment. IC Role / Device Role / Timing Role: Parameter block storage with independent 8-Kbyte erasable sectors for safe, atomic updates of clinical settings. Use Value: Sector architecture enables reliable over-the-air parameter updates without risking corruption of operational firmware stored elsewhere. |
| Automotive Infotainment Boot ROM | Networking Equipment BIOS Storage |
Use Scenario: Hosting boot code and recovery images in automotive head units operating across -40°C to +85°C extended temperature range. IC Role / Device Role / Timing Role: Primary boot memory with hardware reset-driven recovery path and 12 V override for field service reflash. Use Value: RESET pin 12 V override enables dealership-level boot sector reprogramming without specialized programmers. | Use Scenario: Storing BIOS and FPGA configuration bitstreams in enterprise switches and routers requiring robust firmware integrity. IC Role / Device Role / Timing Role: Dual-role memory: boot block holds immutable BIOS loader; main blocks store upgradable firmware and feature modules. Use Value: Independent sector erase allows patching individual firmware components without full-device reflash downtime. |
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; lacks 12 V RESET override and boot block lockout override. | Supports standard sector erase but no hardware-protected boot block; requires software-only protection schemes. | Select when boot block override is unnecessary and cost sensitivity outweighs security requirements. |
| MX29LV010TC-90G | 1 Mbit, 90 ns, 3.0–3.6 V; includes CFI query support and deeper power-down mode (1 µA), but no 12 V RESET feature. | CFI compliance simplifies auto-detection in generic flash programmers; lacks dedicated boot block lockout mechanism. | Choose for systems requiring standardized flash interrogation and ultra-low standby current in always-on network nodes. |
Compared with SST39VF010-90-4C-NHE and MX29LV010TC-90G, the AT49BV001-90TC uniquely combines hardware-enforced boot block protection with 12 V–enabled recovery-critical for safety-certified or field-serviceable embedded systems where firmware integrity is non-negotiable.
Availability
AT49BV001-90TC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, and automotive infotainment boot ROM requiring stable component supply with long-term lifecycle support.
Supply support for AT49BV001-90TC 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 support for legacy Atmel Flash products including the AT49BV series.
The AT49BV001-90TC belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for 3V-only embedded systems needing reliable, in-system reprogrammable nonvolatile storage with hardware security features.
FAQ
What is the correct address range for the boot block in AT49BV001-90TC?
The boot block in AT49BV001-90TC occupies address range 1C000H to 1FFFFH (16 Kbytes). This differs from non-T variants (e.g., AT49BV001), which use 00000H–03FFFH. The T-suffix denotes top-boot architecture, placing the protected sector at the highest memory addresses - a key detail for linker script configuration and bootloader placement in the AT49BV001-90TC.
Does AT49BV001-90TC support 12 V programming or only 3 V operation?
The AT49BV001-90TC operates exclusively from a 2.7–3.6 V supply for all read, program, and erase functions. However, applying 12 V ± 0.5 V to the RESET pin during erase or program cycles enables temporary override of the boot block programming lockout - this is not programming voltage, but a dedicated hardware recovery feature unique to the AT49BV001-90TC and related T-suffix devices.
How does the AT49BV001-90TC indicate completion of a byte programming cycle?
The AT49BV001-90TC provides two hardware methods: (1) DATA polling - reading the programmed byte returns its complement on I/O7 until completion, then true data; (2) Toggle Bit - I/O6 toggles between 0 and 1 during programming and stops toggling upon completion. Both mechanisms are fully functional in the AT49BV001-90TC and require no external timing delays in host firmware.
Is the NC pin on AT49BV001-90TC safe to connect to ground or leave floating?
Pin 16 of the AT49BV001-90TC (TSOP-32 package) is designated NC (No Connect) and must remain unconnected - neither grounded nor tied to any signal. Connecting it may cause undefined behavior or damage, as confirmed in the official datasheet. This NC pin is distinct from DC (Don't Connect) pins used in PLCC/DIP variants and applies strictly to the TSOP footprint of the AT49BV001-90TC.
What is the maximum allowable erase time for AT49BV001-90TC during full-chip erase?
The maximum erase cycle time for full-chip erase in the AT49BV001-90TC is 10 seconds, as specified in the datasheet under tEC (Erase Cycle Time). This value is guaranteed across the commercial temperature range (0°C to 70°C) and VCC = 2.7–3.6 V. The device internally manages timing - no external clock or timeout monitoring is needed beyond this 10-second ceiling for the AT49BV001-90TC.
AT49BV001-90TC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.724", 18.40mm 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-TSOP
AT49BV001-90TC FAQ
1.How can I place an order for AT49BV001-90TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001-90TC 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 AT49BV001-90TC reliable?
The price and inventory of AT49BV001-90TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001-90TC is usually 5 days.
3.What payment methods are accepted for AT49BV001-90TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001-90TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001-90TC?
AT49BV001-90TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001-90TC 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 AT49BV001-90TC?
For technical support, including AT49BV001-90TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001-90TC requirements.
6.How does Aetrix verify that AT49BV001-90TC is sourced from the original manufacturer or authorized distributors?
All AT49BV001-90TC 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 AT49BV001-90TC meets industry standards.
7.What is the process for return or replacement of AT49BV001-90TC?
All AT49BV001-90TC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001-90TC, 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 AT49BV001-90TC part is unused and in its original packaging.
Return procedure for AT49BV001-90TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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