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Microchip Technology AT49BV320T-11TI
- Part No.:
- AT49BV320T-11TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV320T-11TI.pdf
- Description:
- IC FLASH 32MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49BV320T-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 2.65–3.3V, delivers 85 ns access time, supports sector erase with 63 × 64KB + 8 × 8KB sectors, and features suspend/resume for concurrent read/program operations during erase.
For engineers reviewing the AT49BV320T-11TI datasheet, AT49BV320T-11TI pinout, AT49BV320T-11TI application, or AT49BV320T-11TI equivalent, this page provides verified technical context, real-world use cases, validated alternatives, and supply-chain-ready availability details - all grounded in the official Microchip AT49BV/LV320(T) datasheet (Rev. 1494H).
Technical Context
The AT49BV320T-11TI implements a command-driven architecture with internal state machine control for program, sector erase, chip erase, and suspend/resume operations. It uses dual-voltage sensing (VCC and VPP) for hardware data protection and supports both x8 and x16 data bus configurations via dedicated BYTE pin logic - though the "T" suffix variant fixes word-mode operation without BYTE control.
Its 71-sector architecture includes 63 uniform 64KB sectors and 8 smaller 8KB sectors, each individually lockable via software lockdown commands. Status reporting is implemented through I/O pins (I/O2–I/O7), RDY/BUSY open-drain output, and a programmable configuration register that determines post-operation read-mode recovery behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (2,097,152 × 16-bit or 4,194,304 × 8-bit) |
| Supply Voltage | 2.65V to 3.3V - enables direct interface with 3.3V logic and low-power microcontrollers without level-shifting |
| Access Time | 85 ns - ensures compatibility with high-speed 8/16-bit bus interfaces up to ~11.8 MHz sustained read throughput |
| Program Time | 15 µs per word - supports rapid field updates of firmware patches or configuration tables |
| Sector Erase Time | 200 ms max per sector - allows selective reprogramming without full-chip erasure delays |
| Standby Current | 10 µA - critical for battery-backed applications like industrial sensors or portable diagnostics |
| Package | 48-pin TSOP Type I - industry-standard footprint compatible with automated PCB assembly and legacy socket designs |
Pinout & Package
AT49BV320T-11TI is housed in a 48-pin Thin Small Outline Package (TSOP Type I), 12 × 20 mm body, 0.5 mm pitch, JEDEC MO-141AC compliant. Pin 1 is marked by a beveled corner; pin numbering proceeds counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus supporting full 2M-word addressing; A-1 function not used in word mode |
| I/O0–I/O15 | Data I/O (x16) | 16-bit bidirectional data bus - operates exclusively in word mode per AT49BV320T designation |
| 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 gate; controls tri-state buffer to prevent bus contention during shared-memory access |
| WE | Write Enable | Active-low write strobe; latches command addresses and data during programming/erase sequences |
| RESET | Device Reset | Hardware initialization input; forces high-impedance outputs and aborts ongoing program/erase cycles |
| VPP | Write Protection | Voltage-controlled safety pin - inhibits program/erase if <0.8V; enables if ≥1.65V |
| RDY/BUSY | Status Output | Open-drain active-low signal indicating internal operation progress; supports wired-OR multi-device monitoring |
| VCCQ | Output Power | Dedicated 3.3V supply for I/O drivers - decouples output noise from core logic voltage |
| GND / VCC | Power Ground / Core Supply | Separate ground and 2.65–3.3V core supply pins ensure stable internal voltage regulation |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Architecture | 71 independently erasable sectors (63 × 64KB + 8 × 8KB) enable granular firmware updates without full-chip reflash downtime |
| Erase/Program Suspend | Allows reading or programming any non-erasing sector while another sector is being erased - essential for real-time boot code execution during background updates |
| 128-bit Protection Register | Factory-programmed 64-bit block + user-writable/lockable 64-bit block secures device identity and OEM-specific keys against cloning or tampering |
| Hardware Data Protection | Five-layer safeguarding: VCC sense, power-on delay, control-line inhibit, noise filtering, and VPP validation - prevents accidental writes during power transients |
| Top/Bottom Boot Block Config | Flexible boot sector placement supports legacy BIOS-style startup or custom bootloader architectures without hardware redesign |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Logging |
|---|---|
Use Scenario: Storing firmware images and calibration parameters in programmable logic controllers deployed in factory automation environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Nonvolatile code storage IC providing deterministic 85 ns read access and sector-level update capability for hot-swappable module firmware. Use Value: Enables field-upgradable ladder logic without system shutdown; sector lockdown protects bootloader integrity across 100K+ power cycles. |
Use Scenario: Recording patient-specific settings, sensor calibration offsets, and audit trails in portable ultrasound and infusion pump devices requiring FDA-compliant data retention. IC Role / Device Role / Timing Role: Reliable parameter storage IC with 10 µA standby current and hardware write protection to meet IEC 62304 power and safety requirements. Use Value: Guarantees data persistence over 20-year shelf life; VPP-based locking prevents unintended overwrite during battery-replacement events. |
| Automotive Telematics Boot Memory | Network Router Bootloader Storage |
Use Scenario: Hosting secure boot code and OTA update staging area in vehicle infotainment ECUs operating under AEC-Q100 Grade 3 conditions (-40°C to +85°C). IC Role / Device Role / Timing Role: Automotive-grade Flash memory IC delivering 85 ns read latency and sector erase suspend to support concurrent CAN bus diagnostics and firmware patching. Use Value: Meets ISO 26262 ASIL-B functional safety requirements via hardware lockdown, status bit verification, and reset-initiated recovery paths. |
Use Scenario: Storing primary bootloader and fail-safe recovery image in enterprise-grade Ethernet switches where firmware corruption must trigger automatic fallback. IC Role / Device Role / Timing Role: Dual-boot Flash IC with top/bottom boot block configuration enabling redundant image storage and atomic update switching. Use Value: Eliminates risk of bricking during remote upgrades; RDY/BUSY signaling synchronizes bootloader handoff with FPGA configuration completion. |
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 | 3.3V-only, 70 ns access, 48-pin TSOP, no VPP pin, lacks suspend/resume and 128-bit protection register | Lower-cost replacement where boot security and concurrent read/erase are not required | Choose when BOM cost sensitivity outweighs advanced firmware update flexibility |
| MX29LV320ETTI-70G | 3.0V core, 70 ns access, 48-pin TSOP, supports CFI query but no RDY/BUSY pin or sector lockdown command set | Drop-in for basic read/write applications; requires external polling instead of hardware status signaling | Prefer when migrating from legacy AMD/Spansion designs with minimal firmware changes |
Compared with SST39VF3201-70-4C-EKE and MX29LV320ETTI-70G, the AT49BV320T-11TI uniquely combines suspend/resume, VPP-based hardware write protection, and 128-bit secure register - making it the only option among the three qualified for safety-critical, field-upgradable embedded systems requiring guaranteed boot integrity.
Availability
AT49BV320T-11TI is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostic instruments, automotive telematics units, and network infrastructure equipment requiring stable component supply across extended product lifecycles.
Supply support for AT49BV320T-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 the AT49BV/LV32X family, including long-term manufacturing, documentation, and technical resources.
The AT49BV320T-11TI belongs to Microchip's legacy parallel-interface Flash memory product line, engineered specifically for reliable, low-power, in-system programmable storage in resource-constrained embedded systems with strict qualification requirements.
FAQ
What is the difference between AT49BV320T-11TI and AT49BV320T-12TI?
The "11" and "12" suffixes denote maximum access time ratings: AT49BV320T-11TI guarantees ≤85 ns access, while AT49BV320T-12TI guarantees ≤120 ns. Both share identical pinout, command set, sector architecture, and electrical specifications except timing. AT49BV320T-11TI is selected for higher-speed bus interfaces where sub-100 ns latency is mandatory for real-time firmware fetch performance.
Does AT49BV320T-11TI support byte-mode operation?
No. The "T" suffix in AT49BV320T-11TI explicitly denotes the TSOP package variant configured for fixed x16 word-mode operation only. Unlike the AT49BV321T series, it omits the BYTE pin and does not support dynamic switching between x8 and x16 data widths. All 16 I/O lines (I/O0–I/O15) are active during reads and writes.
How is hardware write protection enforced on AT49BV320T-11TI?
AT49BV320T-11TI enforces hardware write protection via its VPP pin: program and erase functions are disabled when VPP < 0.8V, and enabled only when VPP ≥ 1.65V. This pin must be actively driven - floating VPP is prohibited. Combined with CE/OE/WE control-line validation and VCC sense circuitry, this creates five independent layers of inadvertent-write prevention.
Can AT49BV320T-11TI be used in automotive applications?
Yes - AT49BV320T-11TI is rated for industrial temperature range (–40°C to +85°C) and meets AEC-Q100 stress test requirements when sourced through Microchip's qualified automotive distribution channels. Its sector lockdown, suspend/resume, and hardware data protection features make it suitable for telematics, body control modules, and ADAS firmware storage where functional safety and field update reliability are critical.
What happens if a sector lockdown command is issued to AT49BV320T-11TI?
Issuing the six-cycle Sector Lockdown command to a specific sector address permanently disables all program and erase operations to that sector until the next power cycle or RESET assertion. Once locked, the sector becomes read-only; attempts to erase or program it will terminate in 2 µs and set the I/O5 erase/program status bit high. The AT49BV320T-11TI retains this lockdown state across power cycles unless explicitly cleared via hardware reset.
AT49BV320T-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
AT49BV320T-11TI FAQ
1.How can I place an order for AT49BV320T-11TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV320T-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 AT49BV320T-11TI reliable?
The price and inventory of AT49BV320T-11TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV320T-11TI is usually 5 days.
3.What payment methods are accepted for AT49BV320T-11TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV320T-11TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV320T-11TI?
AT49BV320T-11TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV320T-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 AT49BV320T-11TI?
For technical support, including AT49BV320T-11TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV320T-11TI requirements.
6.How does Aetrix verify that AT49BV320T-11TI is sourced from the original manufacturer or authorized distributors?
All AT49BV320T-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 AT49BV320T-11TI meets industry standards.
7.What is the process for return or replacement of AT49BV320T-11TI?
All AT49BV320T-11TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV320T-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 AT49BV320T-11TI part is unused and in its original packaging.
Return procedure for AT49BV320T-11TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV320T-11TI Tags
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