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Microchip Technology AT49BV3218T-11TI
- Part No.:
- AT49BV3218T-11TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV3218T-11TI.pdf
- Description:
- IC FLASH 32MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,151
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Product details
Overview
AT49BV3218T-11TI from Microchip Technology (formerly Atmel) is a 32-Mbit (2M × 16 / 4M × 8) single-supply Flash memory IC supporting 2.65–3.3 V operation, 85 ns access time, sector erase architecture with 71 independently lockable sectors, and dual-plane concurrent read/program-erase capability. It is used in embedded boot code storage and firmware update applications requiring in-system reprogrammability.
For engineers reviewing the AT49BV3218T-11TI datasheet, AT49BV3218T-11TI pinout, AT49BV3218T-11TI application, or AT49BV3218T-11TI equivalent, key selection criteria include sector lockdown support, erase suspend/resume functionality, TSOP-48/CBGA-48 package compatibility, 128-bit protection register, and dual-plane architecture enabling real-time firmware patching without halting system execution.
Technical Context
The AT49BV3218T-11TI implements a dual-plane Flash architecture: Plane A contains eight 4K-word and fifteen 32K-word sectors; Plane B contains forty-eight 32K-word sectors. This enables concurrent reads from one plane while programming or erasing the other - eliminating read latency during background updates.
It supports hardware- and software-based sector lockdown, 128-bit factory/user-programmable protection register (with Block A factory-set, Block B user-lockable), and three end-of-operation detection methods: RDY/BUSY pin, Data Polling (I/O7 complement), and Toggle Bit (I/O6/I/O2). Erase suspend/resume commands allow interruption of sector erase for urgent reads or writes within the same plane.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (2,097,152 × 16 or 4,194,304 × 8), enabling full boot code + application image storage in single device |
| Access Time | 110 ns max (AT49BV3218T-11 variant), meeting timing requirements for 8–10 MHz microcontroller bus interfaces |
| Supply Voltage | 2.65–3.3 V (BV grade), compatible with 3.3 V logic systems without level translation |
| Sector Erase | 71 sectors: sixty-three 64 KB (32K-word) + eight 8 KB (4K-word); allows granular firmware partitioning and field updates |
| Program/Erase Speed | 15 µs word program time; 200 ms sector erase time - enabling sub-second firmware patching in embedded systems |
| Power Consumption | 25 mA active current; 10 µA standby - suitable for low-power industrial controllers with periodic wake-up |
| Operating Temperature | -40°C to +85°C (industrial grade), validated for use in automotive body control modules and industrial HMIs |
Pinout & Package
AT49BV3218T-11TI is available in 48-pin TSOP-I (Type 1) and 48-ball CBGA packages. Pin functions are identical across both packages; ball/pin numbering differs per mechanical layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus supporting full 32-Mbit addressing; A-1 function on I/O15 in byte mode |
| I/O0–I/O15 | Data I/O (x16) / I/O0–I/O7 + A-1 (x8) | Configurable 16-bit or 8-bit data interface; BYTE pin selects mode - critical for MCU bus width matching |
| CE, OE, WE | Chip Enable, Output Enable, Write Enable | Three-control-line interface prevents bus contention; supports standard microprocessor timing |
| RDY/BUSY | Open-drain status output | Active-low signal indicates internal program/erase activity; supports wired-OR multi-device monitoring |
| RESET | Hardware initialization input | Asynchronous reset halts ongoing operations and forces read/standby mode - essential for safe recovery after power glitches |
| BYTE | Interface width select | Logic high = x16 mode (I/O0–I/O15 active); logic low = x8 mode (I/O0–I/O7 active, I/O15 = A-1) - determines MCU data bus mapping |
| VPP | Optional programming voltage | Pin 13/14 (TSOP) or B3/C4 (CBGA); unconnected in standard 3.3 V operation - simplifies power design |
Key Features
| Feature | Design Value |
|---|---|
| Dual-plane architecture | Enables simultaneous read from one plane while programming/erasing the other - eliminates firmware update stalls in real-time systems |
| Erase suspend/resume | Interrupts sector erase to service urgent read/write requests in same plane - improves system responsiveness during field updates |
| Sector lockdown | Per-sector write-protection via six-cycle command; preserves boot code integrity while allowing application partition updates |
| 128-bit protection register | Factory-programmed 64-bit ID + user-programmable 64-bit block (lockable) - supports secure boot authentication and anti-cloning |
| Single-pulse program mode | Reduces programming overhead by replacing four-cycle command sequence with single WE pulse - accelerates in-system firmware loading |
Applications
| Industrial PLC Firmware Storage | Automotive Body Control Module |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers with runtime diagnostics. IC Role / Device Role / Timing Role: Non-volatile boot and application code storage with in-system reprogrammability and sector-level lockdown. Use Value: Enables field firmware patches without controller replacement; dual-plane operation maintains I/O scanning during updates. | Use Scenario: Holding boot loader and CAN gateway firmware in vehicle door modules with over-the-air update capability. IC Role / Device Role / Timing Role: Secure, temperature-rated Flash memory for safety-critical boot code and calibrated parameter tables. Use Value: Sector lockdown protects bootloader; 128-bit register supports cryptographic key binding; -40°C to +85°C rating ensures reliability under hood conditions. |
| Medical Diagnostic Equipment | Network Router Boot Image |
Use Scenario: Storing FPGA configuration bitstreams and application firmware in portable ultrasound devices requiring FDA-compliant traceability. IC Role / Device Role / Timing Role: High-reliability Flash memory with hardware data protection and power-fail-safe programming. Use Value: Hardware VCC sense and noise filtering prevent corruption during brown-out; erase suspend allows diagnostic interrupt handling mid-update. | Use Scenario: Hosting primary and fallback boot images in enterprise-grade routers with hot-failover capability. IC Role / Device Role / Timing Role: Dual-image Flash storage with independent sector locking for A/B firmware partitioning. Use Value: Concurrent read from inactive image during active image update ensures zero-downtime failover; RDY/BUSY pin synchronizes bootloader handoff. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF3201C-70-4I-EKE | 32 Mbit, 70 ns access, 3.0–3.6 V supply; no dual-plane or erase suspend; 48-TSOP only | Lacks concurrent read/erase and sector suspend - requires full system stall during updates | Choose when cost sensitivity outweighs real-time update needs and dual-plane features are unnecessary |
| MX29LV320ETTI-70G | 32 Mbit, 70 ns access, 3.0–3.6 V; top/bottom boot sectors only; no 128-bit protection register | Supports basic sector erase but lacks lockdown granularity and hardware security features | Prefer for legacy designs where Atmel-specific command set compatibility is not required |
Compared with SST39VF3201C-70-4I-EKE and MX29LV320ETTI-70G, the AT49BV3218T-11TI delivers unique value through dual-plane concurrency, erase suspend, and 128-bit protection - making it optimal for safety-aware, field-upgradable embedded systems where runtime continuity and firmware integrity are mandatory.
Availability
AT49BV3218T-11TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive body control modules, medical diagnostic equipment, and network router boot image applications requiring stable component supply across extended product lifecycles.
Supply support for AT49BV3218T-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 continues to support its Flash memory portfolio with long-term industrial and automotive qualification.
The AT49BV/LV3218(T) series was designed for embedded systems requiring robust, in-system programmable non-volatile storage with hardware security, real-time update capability, and industrial temperature resilience.
FAQ
What is the operating voltage range for the AT49BV3218T-11TI?
The AT49BV3218T-11TI operates from 2.65 V to 3.3 V (BV grade), making it compatible with standard 3.3 V logic systems. It does not require external voltage translation or auxiliary supplies, and its hardware data protection circuitry inhibits programming if VCC falls below ~1.8 V - ensuring reliable operation during power transients. The AT49BV3218T-11TI is not rated for 5 V operation.
How does the dual-plane architecture of the AT49BV3218T-11TI improve system performance?
The AT49BV3218T-11TI's dual-plane architecture allows reads from Plane B while erasing or programming Plane A - and vice versa - eliminating wait states during firmware updates. This concurrency enables real-time system operation (e.g., continuous sensor polling or motor control) even during background Flash maintenance. The AT49BV3218T-11TI achieves this without external arbitration logic or additional memory buffers.
Can the AT49BV3218T-11TI be used in byte-mode (x8) and word-mode (x16) configurations?
Yes - the AT49BV3218T-11TI supports both configurations via the BYTE pin: logic high enables x16 mode (I/O0–I/O15 active); logic low enables x8 mode (I/O0–I/O7 active, I/O15 repurposed as A-1 LSB address). This flexibility allows direct interfacing with 8-bit or 16-bit microcontrollers without glue logic. The AT49BV3218T-11TI's address and data mapping is fully defined for both modes in the sector address tables.
What mechanisms protect against accidental writes to the AT49BV3218T-11TI?
The AT49BV3218T-11TI includes multiple hardware safeguards: VCC sense (blocks programming below ~1.8 V), 10 ms power-on delay, noise filtering (rejects <15 ns pulses on CE/WE), and control-line inhibition (requires specific CE/OE/WE states). Additionally, sector lockdown and 128-bit protection register provide software-enforced write protection. These layers ensure the AT49BV3218T-11TI remains immune to spurious writes during EMI events or power instability.
Does the AT49BV3218T-11TI support in-system programming without external high-voltage supplies?
Yes - the AT49BV3218T-11TI performs all program and erase operations using only the 2.65–3.3 V VCC supply; no external VPP voltage is required. The VPP pin is optional and may be left unconnected. Programming is initiated via documented six-byte command sequences (e.g., Chip Erase, Sector Erase), and the AT49BV3218T-11TI internally generates necessary voltages - enabling true single-supply in-system reprogramming in space-constrained designs.
AT49BV3218T-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:
- 20µs
- 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
AT49BV3218T-11TI FAQ
1.How can I place an order for AT49BV3218T-11TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV3218T-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 AT49BV3218T-11TI reliable?
The price and inventory of AT49BV3218T-11TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV3218T-11TI is usually 5 days.
3.What payment methods are accepted for AT49BV3218T-11TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV3218T-11TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV3218T-11TI?
AT49BV3218T-11TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV3218T-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 AT49BV3218T-11TI?
For technical support, including AT49BV3218T-11TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV3218T-11TI requirements.
6.How does Aetrix verify that AT49BV3218T-11TI is sourced from the original manufacturer or authorized distributors?
All AT49BV3218T-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 AT49BV3218T-11TI meets industry standards.
7.What is the process for return or replacement of AT49BV3218T-11TI?
All AT49BV3218T-11TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV3218T-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 AT49BV3218T-11TI part is unused and in its original packaging.
Return procedure for AT49BV3218T-11TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV3218T-11TI Tags
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