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Microchip Technology AT49BV3218-90TI
- Part No.:
- AT49BV3218-90TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV3218-90TI.pdf
- Description:
- IC FLASH 32MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49BV3218-90TI from Microchip Technology (formerly Atmel) is a 32-Mbit (2M × 16 / 4M × 8) single-supply Flash memory IC with 2.65–3.3 V operation, 90 ns access time, sector erase architecture (71 sectors), dual-plane concurrent read/program-erase capability, and TSOP-48 package. It serves as nonvolatile program/data storage in embedded boot code, firmware update, and industrial control systems.
For engineers reviewing the AT49BV3218-90TI datasheet, AT49BV3218-90TI pinout, AT49BV3218-90TI application, or AT49BV3218-90TI equivalent, key selection criteria include sector lockdown support, erase suspend/resume functionality, byte/word mode select via BYTE pin, RDY/BUSY signaling, and compatibility with 3.3 V microcontroller buses requiring fast in-system reprogramming.
Technical Context
This device 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. Reads from one plane may occur concurrently with program or erase operations in the other plane - enabling real-time firmware execution during background updates.
It supports hardware and software product identification (manufacturer code 1FH, device code 00D8H), 128-bit protection register (factory-block A + user-lockable block B), and Erase Suspend/Resume commands that pause active erases to allow reads or programming in other sectors of the same plane - with ≤15 µs suspend latency and no requirement for external clocks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (2,097,152 × 16-bit or 4,194,304 × 8-bit) - supports both word and byte data interfaces without external multiplexing. |
| Access Time | 90 ns max - ensures compatibility with high-speed 11 MHz bus timing (tACC ≤ 90 ns) in 3.3 V embedded systems. |
| Supply Voltage | 2.65 V to 3.3 V - enables direct interface with 3.3 V logic families and eliminates need for level shifters. |
| Active Current | 25 mA typical - low power consumption during read cycles reduces thermal load in space-constrained designs. |
| Standby Current | 10 µA typical - supports battery-backed or always-on applications requiring ultra-low quiescent power. |
| Sector Count | 71 sectors (63 × 64 KB + 8 × 8 KB) - enables granular firmware partitioning with independent lock/unlock per sector. |
| Program Time | 15 µs per word - accelerates field firmware patching and reduces system downtime during updates. |
| Erase Time | 200 ms per sector - predictable timing simplifies host-side timeout management for robust update protocols. |
Pinout & Package
AT49BV3218-90TI is packaged in a 48-pin Thin Small Outline Package (TSOP Type I), compliant with JEDEC MO-142 standard, with 0.5 mm pitch and body dimensions of 12.0 × 20.0 mm.
| 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. |
| CE | Chip Enable | Active-low chip select; used with OE to prevent bus contention in multi-device systems. |
| OE | Output Enable | Active-low output control; enables high-impedance state when inactive to isolate data bus. |
| WE | Write Enable | Active-low write strobe; latches command sequences and initiates program/erase cycles. |
| RESET | Device Reset | Active-low initialization signal; halts ongoing operations and returns device to read/standby mode. |
| RDY/BUSY | Status Output | Open-drain ready/busy indicator; allows OR-tying multiple devices for centralized status monitoring. |
| BYTE | Interface Mode Select | Logic high = 16-bit word mode (I/O0–I/O15 active); logic low = 8-bit byte mode (I/O0–I/O7 active). |
| I/O0–I/O15 | Data I/O | Bidirectional data bus; I/O15 doubles as LSB address input (A-1) in byte mode. |
| VPP | Optional Programming Supply | Pin 13 or 14 (TSOP); not required for standard 3.3 V operation - left unconnected in most designs. |
| VCC / VSS | Power / Ground | Single 2.65–3.3 V supply; dual ground pins (pins 24 & 48) reduce noise coupling in high-speed reads. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-plane architecture | Enables concurrent read from one memory plane while programming or erasing the other - eliminating wait states during firmware updates. |
| Erase suspend/resume | Pauses active sector erase to permit immediate read/program access to other sectors in same plane - critical for real-time interrupt handling. |
| Sector lockdown | Per-sector write-protection lockout prevents accidental overwrite of boot code or security-critical firmware partitions. |
| 128-bit protection register | Factory-programmed 64-bit ID block + user-programmable 64-bit block with lockable write capability - supports secure device authentication. |
| Hardware data protection | VCC sense, 10 ms power-on delay, noise filtering (<15 ns pulses rejected), and control-line inhibit prevent spurious writes during power transients. |
| Single-pulse program mode | Reduces programming overhead by accepting single WE pulses after six-byte entry sequence - cuts host controller software complexity. |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
Use Scenario: Storing and updating ladder logic programs and configuration parameters in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile storage for executable firmware images with sector-level lockdown to protect bootloader and safety-critical routines. Use Value: Concurrent read/erase capability allows runtime diagnostics and parameter logging during background firmware validation - minimizing machine downtime. | Use Scenario: Holding certified boot firmware and regulatory-compliant calibration data in portable diagnostic equipment with strict revision control requirements. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for FDA/IEC 62304-compliant startup code and encrypted calibration tables. Use Value: 128-bit protection register and sector lockdown ensure firmware integrity and traceability - meeting audit requirements for medical device lifecycle management. |
| Automotive Infotainment System Updates | Networking Equipment Configuration Storage |
Use Scenario: Hosting updatable UI assets, voice recognition models, and feature-enabling keys in vehicle head units with over-the-air (OTA) update capability. IC Role / Device Role / Timing Role: High-reliability Flash memory supporting AEC-Q100 Grade 3 temperature range (−40°C to +85°C) and robust erase suspend during CAN bus interrupts. Use Value: 90 ns access time and dual-plane operation enable seamless UI rendering while applying differential firmware patches - preserving perceived system responsiveness. | Use Scenario: Storing switch/router configuration profiles, MAC address tables, and protocol stacks in enterprise-grade networking hardware requiring zero-downtime failover. IC Role / Device Role / Timing Role: Dual-bank Flash with independent sector locking for active/inactive configuration banks - enabling atomic swap during hot restarts. Use Value: Erase suspend allows immediate read access to backup config sectors during primary bank erase - guaranteeing uninterrupted packet forwarding during maintenance windows. |
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, 3.0–3.6 V supply; lacks dual-plane architecture and erase suspend; uses different command set. | No concurrent read/program-erase; requires full wait-state blocking during erase - unsuitable for real-time systems needing background updates. | Select only if dual-plane operation is unnecessary and legacy SST command compatibility is required. |
| MX29LV320ETTI-90G | 32 Mbit x16, 90 ns, 3.0–3.6 V; includes CFI query support and common flash interface; no 128-bit protection register. | CFI compliance simplifies driver portability across vendors but lacks hardware-based sector lockdown and protection register security features. | Prefer for standardized flash abstraction layers (e.g., U-Boot CFI drivers); avoid where secure boot integrity is mandated. |
Compared with SST39VF3201-90-4C-EKE and MX29LV320ETTI-90G, the AT49BV3218-90TI uniquely delivers concurrent dual-plane operation and hardware-enforced sector lockdown - making it the only option among the three capable of safe, real-time firmware updates in safety-critical embedded systems.
Availability
AT49BV3218-90TI is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, automotive infotainment, and networking equipment requiring stable component supply and long-term obsolescence management.
Supply support for AT49BV3218-90TI 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 is a global semiconductor company specializing in microcontrollers, analog devices, Flash memory, and security solutions - acquired Atmel in 2016 and maintains full technical and manufacturing continuity for legacy Atmel Flash products.
The AT49BV/LV3218 family was designed for embedded systems requiring reliable, in-system programmable nonvolatile storage with advanced data protection, sector granularity, and real-time operational flexibility - particularly targeting boot code, firmware, and configuration retention.
FAQ
What voltage range does the AT49BV3218-90TI support for reliable operation?
The AT49BV3218-90TI operates within a single 2.65 V to 3.3 V supply range. This BV-series variant is optimized for 3.3 V systems and does not support the wider 3.0–3.6 V LV-range. Operation outside this window - including below 2.65 V - triggers hardware data protection that inhibits programming, ensuring bit integrity during brown-out conditions. The AT49BV3218-90TI datasheet specifies VCC = 2.65–3.3 V as the absolute functional range.
Does the AT49BV3218-90TI support both 8-bit and 16-bit data interfaces?
Yes, the AT49BV3218-90TI supports configurable 8-bit or 16-bit operation via the BYTE pin. When BYTE = HIGH, the device operates in 16-bit word mode with I/O0–I/O15 active; when BYTE = LOW, it enters 8-bit byte mode with I/O0–I/O7 active and I/O15 repurposed as A-1 (LSB address). This dual-interface capability allows flexible integration with microcontrollers offering either bus width - without requiring external glue logic or data multiplexing.
How does the dual-plane architecture of the AT49BV3218-90TI improve system performance?
The AT49BV3218-90TI's dual-plane architecture divides memory into Plane A (23 sectors) and Plane B (48 sectors), enabling simultaneous read from one plane while programming or erasing the other. This eliminates mandatory wait states during firmware updates - allowing real-time execution of application code from Plane A while background erasure occurs in Plane B. The AT49BV3218-90TI achieves true concurrency without arbitration overhead or external buffering.
Can the AT49BV3218-90TI be used in automotive applications requiring extended temperature operation?
Yes - the AT49BV3218-90TI is rated for −40°C to +85°C case temperature (Industrial grade), matching AEC-Q100 Grade 3 requirements. Its hardware data protection (VCC sense, noise filtering, power-on delay), sector lockdown, and erase suspend features provide robustness against automotive electrical transients and thermal cycling. While not officially AEC-Q100 certified, the AT49BV3218-90TI has been widely deployed in infotainment and telematics modules meeting Tier-1 automotive reliability standards.
What methods are available to detect completion of program or erase operations on the AT49BV3218-90TI?
The AT49BV3218-90TI provides three independent detection methods: (1) RDY/BUSY pin - open-drain output pulled low during internal operations; (2) Data Polling - complement of last written data appears on I/O7 until completion; (3) Toggle Bit - I/O6 toggles between 0/1 during operation and stabilizes upon completion. All three are fully supported in the AT49BV3218-90TI and may be used simultaneously or selectively based on system design constraints.
AT49BV3218-90TI 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:
- 20µs
- 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
AT49BV3218-90TI FAQ
1.How can I place an order for AT49BV3218-90TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV3218-90TI 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 AT49BV3218-90TI reliable?
The price and inventory of AT49BV3218-90TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV3218-90TI is usually 5 days.
3.What payment methods are accepted for AT49BV3218-90TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV3218-90TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV3218-90TI?
AT49BV3218-90TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV3218-90TI 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 AT49BV3218-90TI?
For technical support, including AT49BV3218-90TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV3218-90TI requirements.
6.How does Aetrix verify that AT49BV3218-90TI is sourced from the original manufacturer or authorized distributors?
All AT49BV3218-90TI 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 AT49BV3218-90TI meets industry standards.
7.What is the process for return or replacement of AT49BV3218-90TI?
All AT49BV3218-90TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV3218-90TI, 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 AT49BV3218-90TI part is unused and in its original packaging.
Return procedure for AT49BV3218-90TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV3218-90TI Tags
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