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Microchip Technology AT49BV320T-90TI
- Part No.:
- AT49BV320T-90TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV320T-90TI.pdf
- Description:
- IC FLASH 32MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,688
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Product details
Overview
AT49BV320T-90TI from Microchip Technology (formerly Atmel) is a 32-Mbit (2M × 16 / 4M × 8) single-supply 3.0V Flash memory IC used for nonvolatile code and data storage in embedded systems. It features 85 ns access time, sector erase architecture with 71 independently lockable sectors (63 × 64KB + 8 × 8KB), 15 µs word program time, and suspend/resume capability for concurrent read/program operations during erase. It is commonly deployed in industrial controllers and boot memory applications requiring in-system reprogrammability.
For engineers reviewing the AT49BV320T-90TI datasheet, AT49BV320T-90TI pinout, AT49BV320T-90TI application, or AT49BV320T-90TI equivalent, key selection considerations include its TSOP-48 package, 2.65–3.3V VCC operation, sector lockdown security, RDY/BUSY status signaling, and compatibility with x16/x8 bus interfaces in boot-block configurations.
Technical Context
The AT49BV320T-90TI implements a command-register-based Flash architecture with internal voltage generation for program/erase. Its 71-sector layout supports granular protection via six-byte Sector Lockdown commands, and its Erase Suspend/Resume and Program Suspend/Resume functions enable real-time background operations without halting system execution.
It uses dual-status detection-Data Polling on I/O7 and Toggle Bit on I/O6-alongside dedicated RDY/BUSY open-drain output (active-low) to signal completion of embedded algorithms. The device defaults to configuration register value "00", returning automatically to read mode after successful operations, and includes hardware data protection via VPP sensing (1.65V threshold), VCC power-on delay (10 ms), and noise filtering on WE/CE inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (2,097,152 × 16 or 4,194,304 × 8), enabling compact firmware storage for mid-complexity microcontrollers. |
| Access Time | 90 ns max (indicated by -90 suffix), ensuring timing compliance with 11 MHz bus interfaces in legacy industrial designs. |
| Supply Voltage | 2.65V to 3.3V only - no 5V tolerance; requires stable low-voltage rail design and separate VCCQ regulation for output drive. |
| Program Time | 15 µs per word - supports high-throughput field updates when combined with Single Pulse Program Mode. |
| Erase Time | 200 ms per sector - enables selective firmware patching without full chip reprogramming delays. |
| Sector Architecture | 71 sectors: 63 × 64KB + 8 × 8KB - allows boot-code isolation in top/bottom configuration with individual write lockout. |
| Security Features | 128-bit protection register (factory + user blocks), sector lockdown, and VPP-dependent write enable - meets basic secure boot requirements. |
Pinout & Package
AT49BV320T-90TI is packaged in a 48-pin Thin Small Outline Package (TSOP Type I, 12mm × 20mm, 0.5mm pitch), pin-compatible with industry-standard x16 Flash footprints. The device operates exclusively in word mode (x16); BYTE pin is not present or functional on this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus supporting full 2M-word addressing; A-1 is not used (x16-only mode). |
| I/O0–I/O15 | Data Bus (x16) | Bi-directional 16-bit data path; all pins active in word mode; no byte-select functionality. |
| CE, OE, WE | Chip/Output/Write Enable | Three independent controls prevent bus contention; OE/CE low + WE high = read; CE/WE low + OE high = write. |
| RESET | Hardware Initialization | Active-low input that forces high-impedance outputs and resets internal state - critical for safe power-up sequencing. |
| VPP | Write Protection Control | Must be ≥1.65V for program/erase; <0.8V disables writes - used for hardware-level firmware write-locking. |
| RDY/BUSY | Status Output | Open-drain active-low signal indicating active erase/program; supports wired-OR multi-device monitoring. |
| VCC, VCCQ, GND | Power Supplies | VCC = core logic (2.65–3.3V); VCCQ = I/O driver supply (tied to VCC for 3.3V outputs); dual GND pins reduce noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Architecture | 71 independently erasable sectors (63 × 64KB + 8 × 8KB) enable targeted firmware updates without full chip erase overhead. |
| Erase/Program Suspend | Allows reading from or programming any non-erasing sector while another sector is being erased - essential for real-time OS boot loaders. |
| Hardware Data Protection | VCC sense (<1.8V inhibits write), 10 ms VCC power-on delay, and 15 ns noise filter on WE/CE prevent spurious programming during power transients. |
| 128-bit Protection Register | Factory-programmed 64-bit block + user-programmable 64-bit block (lockable) provides tamper-resistant device identity and secure key storage. |
| Top/Bottom Boot Block | Configurable boot sector location (SA0–SA7 or SA64–SA70) ensures compatibility with diverse processor reset vector mappings. |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Memory |
|---|---|
Use Scenario: Storing firmware and calibration tables in programmable logic controllers operating in harsh factory environments with frequent power cycling. IC Role / Device Role / Timing Role: Nonvolatile boot memory mapped to microcontroller's reset vector; accessed at power-up with ≤90 ns latency to meet deterministic boot timing. Use Value: Sector lockdown protects bootloader code while allowing field-upgradable application firmware in unprotected sectors - reducing service downtime. |
Use Scenario: Holding certified boot code and safety-critical configuration data in FDA-regulated diagnostic equipment requiring traceable firmware integrity. IC Role / Device Role / Timing Role: Secure initialization memory with hardware write-protection (VPP + sector lockdown) and 128-bit register for device authentication during power-on self-test. Use Value: Prevents unauthorized firmware modification via physical VPP control and locked sectors - satisfies IEC 62304 software lifecycle requirements. |
| Telecom Base Station Configuration | Automotive Infotainment Head Unit |
Use Scenario: Storing radio protocol stacks and network parameter sets in outdoor telecom nodes exposed to wide temperature swings (-40°C to +85°C). IC Role / Device Role / Timing Role: x16 interface Flash providing fast read access to configuration data during cold start; RDY/BUSY pin synchronizes host CPU polling. Use Value: 85 ns access time and industrial-grade TSOP package ensure reliable operation across extended temperature range without derating. |
Use Scenario: Hosting infotainment OS kernel and UI assets in automotive head units where EMI resilience and in-system update capability are mandatory. IC Role / Device Role / Timing Role: In-system programmable code storage with suspend/resume support - enables seamless over-the-air (OTA) updates while maintaining audio playback. Use Value: Program Suspend allows host CPU to read audio buffers from non-programming sectors during firmware write - eliminating audio dropouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF3201-90-4C-EKE | 32 Mbit x16, 90 ns, 3.0–3.6V supply; lacks RDY/BUSY pin and sector suspend; uses different command set. | No suspend/resume capability limits use in real-time multitasking systems; no VPP pin reduces hardware write protection options. | Choose for cost-sensitive, non-real-time applications where simplified command interface suffices and suspend is unnecessary. |
| MX29LV320ETTI-90G | 32 Mbit x16, 90 ns, 3.0–3.6V; includes CFI query support and standard JEDEC commands; no 128-bit protection register. | Better software toolchain compatibility due to CFI, but missing Atmel-specific security features like factory-programmed ID block. | Prefer when migrating legacy designs to standardized Flash tooling; avoid if 128-bit register or sector lockdown is required for certification. |
Compared with SST39VF3201-90-4C-EKE and MX29LV320ETTI-90G, the AT49BV320T-90TI uniquely combines suspend/resume, VPP-based hardware write lock, and factory-seeded 128-bit security - making it suitable for safety- or security-critical embedded boot applications where those features are mandated.
Availability
AT49BV320T-90TI is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, telecom infrastructure, and automotive infotainment systems requiring stable component supply across extended product lifecycles.
Supply support for AT49BV320T-90TI 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 the AT49BV/LV Flash family. The company specializes in microcontrollers, analog, and nonvolatile memory solutions for industrial, automotive, and IoT markets.
The AT49BV320T-90TI belongs to Atmel's legacy parallel-interface Flash product line, designed specifically for embedded systems requiring reliable, in-system reprogrammable boot memory with hardware-level security and real-time operational flexibility.
FAQ
What is the operating voltage range for AT49BV320T-90TI?
The AT49BV320T-90TI operates strictly within 2.65V to 3.3V for VCC. It does not support 5V or mixed-voltage operation. VCCQ must be tied to VCC for standard 3.3V I/O levels. Operation outside this range may cause data corruption or failure to enter program/erase modes, especially since VPP write-enable threshold (1.65V) is referenced to this supply.
Does AT49BV320T-90TI support byte-mode (x8) operation?
No, AT49BV320T-90TI is the "T" variant configured for x16-only operation and lacks the BYTE pin. Unlike the AT49BV321T, it cannot be switched to byte mode. Data appears on I/O0–I/O15 exclusively, and address lines A0–A20 fully decode the 2M-word space - making it incompatible with x8-only bus architectures without external multiplexing.
How does sector lockdown work on AT49BV320T-90TI?
Sector lockdown on AT49BV320T-90TI is enabled per sector using a six-cycle command sequence with the sector address. Once activated, the sector becomes permanently read-only until the next power cycle or RESET assertion. Lockdown prevents both erase and program operations, protecting boot code. Status can be verified via Software Product Identification mode by reading address 00002H in the target sector.
What is the purpose of the VPP pin on AT49BV320T-90TI?
The VPP pin on AT49BV320T-90TI serves as a hardware write-protection enable. Program and erase functions are inhibited when VPP < 0.8V, and enabled only when VPP ≥ 1.65V. It must not be left floating and is typically tied to VCC through a jumper or FPGA-controlled GPIO to enforce secure firmware update policies - a key requirement in certified embedded systems.
Can AT49BV320T-90TI be used in new designs?
Microchip recommends AT49BV320A(T)/322A(T) for new designs due to improved reliability and extended lifecycle support. However, AT49BV320T-90TI remains viable for legacy design refreshes, repair, or applications where existing qualification data and PCB layout reuse are critical. Aetrix Electronics maintains inventory and offers technical support for ongoing production use.
AT49BV320T-90TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 48-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:
- 32Mbit
- Memory Organization:
- 4M x 8, 2M x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 150µs
- Access Time:
- 90 ns
- Voltage - Supply:
- 2.65V ~ 3.3V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSOP
AT49BV320T-90TI FAQ
1.How can I place an order for AT49BV320T-90TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV320T-90TI 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 AT49BV320T-90TI reliable?
The price and inventory of AT49BV320T-90TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV320T-90TI is usually 5 days.
3.What payment methods are accepted for AT49BV320T-90TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV320T-90TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV320T-90TI?
AT49BV320T-90TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV320T-90TI 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 AT49BV320T-90TI?
For technical support, including AT49BV320T-90TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV320T-90TI requirements.
6.How does Aetrix verify that AT49BV320T-90TI is sourced from the original manufacturer or authorized distributors?
All AT49BV320T-90TI 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 AT49BV320T-90TI meets industry standards.
7.What is the process for return or replacement of AT49BV320T-90TI?
All AT49BV320T-90TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV320T-90TI, 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 AT49BV320T-90TI part is unused and in its original packaging.
Return procedure for AT49BV320T-90TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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