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Microchip Technology AT49BV320-11TI
- Part No.:
- AT49BV320-11TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV320-11TI.pdf
- Description:
- IC FLASH 32MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,050
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Product details
Overview
AT49BV320-11TI from Microchip Technology (formerly Atmel) is a 32-Mbit (2M × 16 / 4M × 8) single-supply Flash memory IC designed for embedded code storage and data logging in microcontroller-based systems. It operates at 2.65–3.3 V, delivers 85 ns access time, supports sector erase with 63 × 64 KB + 8 × 8 KB sectors, and integrates suspend/resume functionality for concurrent read/program operations - enabling real-time firmware updates in industrial controllers.
For engineers reviewing the AT49BV320-11TI datasheet, AT49BV320-11TI pinout, AT49BV320-11TI application, or AT49BV320-11TI equivalent, key selection considerations include its TSOP-48 package, word-mode-only operation, VPP write-protection pin, sector lockdown security, and compatibility with 8-/16-bit bus interfaces in boot memory and firmware storage designs.
Technical Context
The AT49BV320-11TI implements a command-register-based architecture with embedded program/erase algorithms, eliminating external high-voltage generation. Its internal write state machine handles timing-critical operations including chip erase (max 10 s), sector erase (200 ms), and byte/word programming (15 µs), all verified via Data Polling (I/O7), Toggle Bit (I/O6), or RDY/BUSY output.
It features dual-voltage I/O support (VCCQ separate from VCC), hardware data protection (VCC sense, noise filtering, WE/CE pulse rejection), and a 128-bit protection register with factory-programmed Block A and user-programmable/lockable Block B - enabling secure boot code storage and field-upgradable firmware partitioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (2,097,152 × 16-bit or 4,194,304 × 8-bit) - supports full firmware images for 8-/16-bit MCUs without external address multiplexing. |
| Access Time | 85 ns - enables direct execution (XIP) from flash in systems with ≤11.8 MHz bus clocks. |
| Supply Voltage | 2.65 V to 3.3 V - compatible with 3.3 V logic domains and low-power embedded rails; no 5 V tolerance required. |
| Program Time | 15 µs per word - reduces firmware update latency; supported by Single Pulse Program Mode for simplified host control. |
| Sector Architecture | 71 sectors: 63 × 64 KB + 8 × 8 KB - allows granular firmware partitioning (e.g., bootloader in protected 8 KB sectors, application in 64 KB blocks). |
| Standby Current | 10 µA - suitable for battery-backed systems requiring persistent nonvolatile storage with minimal quiescent draw. |
| VPP Pin Function | Write-protection enable: program/erase inhibited if VPP < 0.8 V; enabled at ≥1.65 V - provides hardware-level write lock independent of software commands. |
Pinout & Package
AT49BV320-11TI is packaged in a 48-pin Thin Small Outline Package (TSOP Type I), pin-compatible with industry-standard x16 Flash memories. The device operates exclusively in word mode (I/O0–I/O15 active); BYTE pin is not implemented.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus supporting full 2M-word addressing; A-1 not used (byte mode disabled). |
| I/O0–I/O15 | Data I/O (x16) | 16-bit bidirectional data path; no byte-lane tri-state - simplifies 16-bit MCU interface design. |
| CE | Chip Enable | Active-low chip select; combined with OE enables bus contention avoidance in multi-device systems. |
| OE | Output Enable | Active-low output control; latches data only when CE is also low - ensures deterministic read timing. |
| WE | Write Enable | Active-low write strobe; initiates command latching and embedded program/erase cycles. |
| RESET | Device Initialization | Hardware reset input; forces read/standby mode and halts ongoing operations - critical for safe power-cycle recovery. |
| VPP | Write Protection | Dedicated voltage-controlled write lock; must be tied to VCC (≥1.65 V) for programming - prevents accidental writes during brownout. |
| RDY/BUSY | Status Output | Open-drain active-low signal indicating internal operation progress; supports wired-OR for multi-device status monitoring. |
| VCCQ | Output Power Supply | Separate 2.65–3.3 V supply for I/O drivers - isolates output swing from core VCC noise in mixed-signal systems. |
Key Features
| Feature | Design Value |
|---|---|
| Erase Suspend/Resume | Allows reading from or programming any non-erasing sector while another sector erases - enables real-time diagnostics during firmware update. |
| Program Suspend/Resume | Permits reading any location while a word program is suspended - supports interrupt-driven host firmware with minimal latency impact. |
| Sector Lockdown | Per-sector write-protection activated via command; locked sectors remain read-only until power cycle - secures bootloader against corruption. |
| 128-bit Protection Register | Factory-programmed 64-bit ID + user-programmable/lockable 64-bit block - enables device authentication and encrypted firmware binding. |
| Hardware Data Protection | VCC sense, 10 ms power-on delay, WE/CE noise filtering (15 ns), and VPP level monitoring - eliminates spurious writes under transient conditions. |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Memory |
|---|---|
|
Use Scenario: Storing certified bootloader and safety-critical application code in programmable logic controllers with field-upgrade capability. IC Role / Device Role / Timing Role: Nonvolatile code storage with hardware write protection and sector lockdown - ensures integrity of safety firmware across power cycles. Use Value: Prevents unauthorized modification of certified code; suspend/resume enables background firmware validation without halting PLC operation. |
Use Scenario: Holding FDA-compliant boot sequence and calibration data in portable diagnostic equipment requiring tamper-evident storage. IC Role / Device Role / Timing Role: Secure boot memory with 128-bit protection register and VPP-controlled write lock - meets IEC 62304 traceability requirements. Use Value: Factory-programmed Block A provides immutable device identity; user-lockable Block B stores calibrated sensor offsets with audit trail. |
| Automotive Infotainment Head Unit | Network Router Configuration Storage |
|
Use Scenario: Hosting updatable UI firmware and localization assets in automotive infotainment systems with over-the-air (OTA) update capability. IC Role / Device Role / Timing Role: High-reliability Flash memory with 85 ns access and sector erase - supports XIP execution and incremental patching. Use Value: Concurrent read/program via suspend/resume allows seamless UI rendering during background firmware download and install. |
Use Scenario: Retaining configuration profiles, MAC tables, and failover policies in enterprise-grade network routers with hot-swap redundancy. IC Role / Device Role / Timing Role: Persistent configuration storage with 10 µA standby current and hardware write protection - ensures settings survive extended power loss. Use Value: Sector lockdown isolates factory-default config (8 KB sectors) from user-modifiable runtime settings (64 KB sectors), preventing misconfiguration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF3201-70-4C-EKE | 3.3 V only, 70 ns access, 48-pin TSOP, same density but no VPP pin or sector lockdown. | Lacks hardware write protection and secure boot features; relies on software locks only. | Choose for cost-sensitive designs where security and robustness are secondary to speed and footprint. |
| MX29LV320ETTI-70G | 3.0 V core, 70 ns access, 48-pin TSOP, supports CFI query but no suspend/resume or 128-bit protection register. | No erase/program suspend capability; requires full sector erase for partial updates. | Prefer when CFI-compatibility and broad toolchain support outweigh need for concurrent operation. |
Compared with SST39VF3201-70-4C-EKE and MX29LV320ETTI-70G, AT49BV320-11TI uniquely combines hardware VPP write lock, sector lockdown, and suspend/resume - making it optimal for safety-critical, field-upgradable, and real-time embedded systems where firmware integrity and operational continuity are mandatory.
Availability
AT49BV320-11TI is available at Aetrix Electronics and suitable for industrial control, medical instrumentation, automotive infotainment, and network infrastructure applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for AT49BV320-11TI 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 manufacturing, documentation, and technical resources.
The AT49BV320-11TI belongs to Atmel's BV-series 3.3 V Flash memory family, engineered for reliable code storage in resource-constrained embedded systems where security, low power, and in-system programmability are essential.
FAQ
What is the operating voltage range for AT49BV320-11TI?
The AT49BV320-11TI operates from 2.65 V to 3.3 V for both VCC and VCCQ. This single-supply range eliminates need for level shifters in 3.3 V systems. VPP must be ≥1.65 V for program/erase; below 0.8 V, all write operations are inhibited - ensuring robustness during brownout conditions. The device draws only 10 µA in standby, supporting battery-powered applications.
Does AT49BV320-11TI support byte-mode operation?
No, AT49BV320-11TI operates exclusively in word mode (16-bit data path). Unlike the AT49BV321(T) variant, it lacks the BYTE pin and does not support 8-bit bus configuration. I/O0–I/O15 are always active, and A-1 functionality is not implemented. Designs requiring byte-mode access must use AT49BV321-11TI or equivalent.
How does sector lockdown work on AT49BV320-11TI?
Sector lockdown on AT49BV320-11TI is enabled per sector via a six-bus-cycle command. Once activated, the sector becomes read-only until the next power cycle or RESET assertion. Locked sectors retain their contents during chip erase and resist accidental reprogramming - ideal for storing immutable bootloader code. Detection is possible via software read at address 00002H within the sector.
What status indicators confirm completion of program/erase on AT49BV320-11TI?
AT49BV320-11TI offers three concurrent status methods: RDY/BUSY pin (active-low open-drain), Data Polling (I/O7 toggles/complements), and Toggle Bit (I/O6 toggles). All require checking I/O5 (erase/program error) and I/O3 (VPP level) to confirm success. The configuration register determines whether automatic return to read mode occurs post-operation - default is "00" (auto-return).
Is AT49BV320-11TI pin-compatible with other 48-pin TSOP Flash memories?
AT49BV320-11TI uses standard 48-pin TSOP Type I pinout (JEDEC MO-141) and is functionally compatible with common x16 Flash footprints. However, pin functions like VPP and RDY/BUSY differ from JEDEC-standard devices - e.g., SST39VF3201 lacks VPP, and MX29LV320E uses different command sets. PCB layout reuse requires verification of control signal mapping and timing compliance.
AT49BV320-11TI 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:
- 110 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
AT49BV320-11TI FAQ
1.How can I place an order for AT49BV320-11TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV320-11TI 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 AT49BV320-11TI reliable?
The price and inventory of AT49BV320-11TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV320-11TI is usually 5 days.
3.What payment methods are accepted for AT49BV320-11TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV320-11TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV320-11TI?
AT49BV320-11TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV320-11TI 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 AT49BV320-11TI?
For technical support, including AT49BV320-11TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV320-11TI requirements.
6.How does Aetrix verify that AT49BV320-11TI is sourced from the original manufacturer or authorized distributors?
All AT49BV320-11TI 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 AT49BV320-11TI meets industry standards.
7.What is the process for return or replacement of AT49BV320-11TI?
All AT49BV320-11TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV320-11TI, 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 AT49BV320-11TI part is unused and in its original packaging.
Return procedure for AT49BV320-11TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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