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Microchip Technology AT49BV3218T-90TI
- Part No.:
- AT49BV3218T-90TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV3218T-90TI.pdf
- Description:
- IC FLASH 32MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,086
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Product details
Overview
AT49BV3218T-90TI 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, 90 ns access time, sector erase architecture with 71 sectors (63 × 64 KB + 8 × 8 KB), and dual-plane concurrent read/program-erase capability. It enables in-system reprogramming in embedded boot code storage and firmware update applications.
For engineers reviewing the AT49BV3218T-90TI datasheet, AT49BV3218T-90TI pinout, AT49BV3218T-90TI application, or AT49BV3218T-90TI equivalent, key selection criteria include sector lockdown support, erase suspend/resume functionality, 128-bit protection register, TSOP-48 package compatibility, and x8/x16 mode flexibility via BYTE pin control.
Technical Context
The AT49BV3218T-90TI implements a dual-plane Flash architecture: Plane A contains eight 4K-word (8K-byte) and fifteen 32K-word (64K-byte) sectors; Plane B contains forty-eight 32K-word sectors. This allows simultaneous read from one plane while programming or erasing the other - eliminating wait states during firmware updates.
It supports hardware- and software-based protection mechanisms including sector lockdown (per-sector write lock), 128-bit factory/user programmable protection register (with Block B lockout), and hardware data protection (VCC sense, noise filtering, CE/OE/WE inhibit). Erase suspend/resume commands enable interruption of sector erase to service real-time read/program requests within the same memory 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 firmware storage in one device. |
| Access Time | 90 ns max - meets timing requirements for 11 MHz bus interfaces without wait states. |
| Supply Voltage | 2.65 V to 3.3 V - compatible with 3.3 V logic systems and low-power embedded designs. |
| Sector Architecture | 71 sectors: 63 × 64 KB + 8 × 8 KB - supports granular firmware partitioning and secure boot block isolation. |
| Program Time | 15 µs per word - enables fast field firmware patching without system downtime. |
| Erase Time | 200 ms per sector - predictable latency for background erase operations. |
| Standby Current | 10 µA - suitable for battery-backed or always-on embedded controllers requiring ultra-low quiescent power. |
| Operating Temp | -40°C to +85°C - qualified for industrial temperature range operation. |
Pinout & Package
AT49BV3218T-90TI is packaged in a 48-pin Thin Small Outline Package (TSOP Type I), pin-compatible with industry-standard JEDEC MO-141AC. The package supports surface-mount assembly and thermal performance suitable for industrial PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus supporting full 32 Mbit addressing; A-1 used as LSB in byte mode only. |
| I/O0–I/O15 | Data I/O (x16) / I/O0–I/O7 + A-1 (x8) | Configurable 16-bit or 8-bit data interface; I/O15 serves dual role as data bit or LSB address in byte mode. |
| CE | Chip Enable | Active-low chip select; enables device on shared data bus and prevents contention when high. |
| OE | Output Enable | Active-low output control; gates data onto bus independently of CE for flexible bus timing. |
| WE | Write Enable | Active-low control for program/erase command latching and data write cycles. |
| BYTE | Interface Mode Select | Logic high = x16 word mode (I/O0–I/O15 active); logic low = x8 byte mode (I/O0–I/O7 active, I/O15 = A-1). |
| RDY/BUSY | Open-drain Status Output | Active-low indicates ongoing program/erase; supports wired-OR connection for multi-device status monitoring. |
| RESET | Hardware Initialization | Active-low resets internal state machine and forces read/standby mode - critical for recovery after failed programming. |
| VPP | Optional Programming Voltage | Pin 13 or 14 may be connected to 12 V for legacy high-voltage programming; not required for standard 3.3 V operation. |
| NC | No Connect | Unbonded pins (e.g., TSOP pin 13/14 when VPP unused) - must remain unconnected per design. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-plane concurrent operation | Enables uninterrupted reads from Plane B while erasing/programming Plane A - improves system responsiveness during firmware updates. |
| Erase suspend/resume | Halts active sector erase to service urgent read/program requests in same plane - avoids full erase abort and restart overhead. |
| Sector lockdown | Per-sector write-protection activated via command; locks boot code sectors permanently until power cycle - prevents accidental corruption. |
| 128-bit protection register | Factory-programmed 64-bit Block A + user-programmable/lockable Block B - supports secure device identification and anti-cloning. |
| Single-pulse program mode | Reduces software overhead by replacing 4-cycle programming with single WE pulse after 6-byte entry sequence - accelerates field updates. |
| Hardware data protection | VCC sense, 10 ms power-on delay, noise filtering (<15 ns), and CE/OE/WE inhibit prevent spurious writes - enhances reliability in noisy environments. |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers with runtime read access during background erase. IC Role / Device Role / Timing Role: Non-volatile boot and application memory with concurrent read/erase capability and sector lockdown for certified firmware partitions. Use Value: Eliminates controller downtime during firmware upgrades; sector lockdown ensures regulatory-compliant separation of safety-critical boot code from field-updatable logic. | Use Scenario: Securing boot loader and diagnostic firmware in FDA-cleared patient monitors requiring tamper-resistant storage. IC Role / Device Role / Timing Role: Trusted execution environment (TEE) companion memory with 128-bit protection register and hardware reset recovery. Use Value: Prevents unauthorized modification of boot code via sector lockdown and factory-unique ID; RDY/BUSY signaling enables deterministic boot timing verification. |
| Automotive Infotainment Update Module | Networking Equipment Configuration Storage |
Use Scenario: Hosting updatable UI assets and feature-enabling keys in head unit systems with over-the-air (OTA) update capability. IC Role / Device Role / Timing Role: Dual-plane Flash memory supporting background OTA image validation while maintaining responsive UI rendering from active plane. Use Value: Concurrent read/program-erase reduces OTA installation time by >40% versus single-plane alternatives; erase suspend handles real-time CAN message buffering during update. | Use Scenario: Storing configuration profiles, MAC addresses, and calibration data in managed Ethernet switches with hot-swap capability. IC Role / Device Role / Timing Role: High-reliability configuration store with sector-level write protection and 10 µA standby current for energy-efficient standby modes. Use Value: Sector lockdown isolates factory-set parameters from field-modified settings; low standby current extends uptime in fanless, thermally constrained enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF3201C-90-4C-EKE | 32 Mbit, 3.0–3.6 V, 90 ns, 48-pin TSOP, no dual-plane or erase suspend. | Lacks concurrent read/erase and sector lockdown - suitable only for simpler, non-real-time firmware storage. | Select when cost sensitivity outweighs need for advanced protection and concurrency features. |
| MX29LV320ETTI-90G | 32 Mbit, 3.0–3.6 V, 90 ns, 48-pin TSOP, top/bottom boot, no 128-bit protection register. | Supports boot-block architecture but lacks per-sector lockdown and dual-plane operation. | Choose for legacy boot code compatibility where sector granularity and security are secondary. |
Compared with SST39VF3201C-90-4C-EKE and MX29LV320ETTI-90G, the AT49BV3218T-90TI provides unique dual-plane concurrency, hardware-enforced sector lockdown, and 128-bit cryptographic identity - making it the only option among the three qualified for safety-critical, real-time firmware update scenarios.
Availability
AT49BV3218T-90TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code retention, automotive infotainment update modules, networking equipment configuration storage, and embedded system BIOS/UEFI storage requiring stable component supply across extended product lifecycles.
Supply support for AT49BV3218T-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 for industrial, automotive, and communications markets.
The AT49BV3218T-90TI belongs to Microchip's legacy parallel-interface Flash memory product line, designed specifically for embedded systems requiring robust in-system programmability, sector-level security, and deterministic timing in resource-constrained environments.
FAQ
What voltage range does the AT49BV3218T-90TI support for reliable operation?
The AT49BV3218T-90TI operates within a 2.65 V to 3.3 V supply range, optimized for 3.3 V logic systems. It includes hardware data protection that inhibits programming if VCC drops below ~1.8 V, and incorporates a 10 ms power-on delay to ensure stable internal circuitry before accepting commands. This ensures robust behavior in brown-out conditions and eliminates need for external voltage supervisors in most designs using AT49BV3218T-90TI.
How does the dual-plane architecture of the AT49BV3218T-90TI improve system performance?
The AT49BV3218T-90TI's dual-plane architecture divides memory into Plane A (23 sectors) and Plane B (48 sectors), allowing reads from one plane while programming or erasing the other. This eliminates mandatory wait states during firmware updates - for example, a GUI can render from Plane B while new firmware is written to Plane A. Unlike single-plane alternatives, AT49BV3218T-90TI delivers true concurrency without software workarounds or external buffering.
Can the AT49BV3218T-90TI be used in both 8-bit and 16-bit data bus configurations?
Yes, the AT49BV3218T-90TI supports configurable x8 and x16 operation via the BYTE pin. When BYTE = high, I/O0–I/O15 function as a 16-bit data bus; when BYTE = low, only I/O0–I/O7 are active as an 8-bit bus and I/O15 becomes the LSB address input (A-1). This flexibility allows direct integration into both legacy 8-bit microcontroller buses and modern 16-bit interfaces without level-shifting or glue logic - a key advantage of AT49BV3218T-90TI over fixed-width Flash devices.
What is the purpose and implementation of sector lockdown in the AT49BV3218T-90TI?
Sector lockdown in the AT49BV3218T-90TI is a hardware-enforced write-protection mechanism activated per sector via a six-bus-cycle command. Once enabled, a locked sector becomes read-only - immune to program, erase, or lockdown override commands until power cycle or RESET. This protects boot code from corruption during field updates. The AT49BV3218T-90TI supports lockdown detection via software read of address 00002H, enabling runtime verification of protected regions - a critical feature for certified embedded systems using AT49BV3218T-90TI.
Does the AT49BV3218T-90TI require external high-voltage programming circuitry?
No, the AT49BV3218T-90TI 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 (TSOP pins 13/14) is optional and intended only for legacy high-voltage programmers; it may be left unconnected in standard 3.3 V designs. Internal charge pumps generate necessary programming voltages, simplifying board layout and reducing BOM count - a significant advantage of AT49BV3218T-90TI over older Flash families requiring 12 V support.
AT49BV3218T-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
AT49BV3218T-90TI FAQ
1.How can I place an order for AT49BV3218T-90TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV3218T-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 AT49BV3218T-90TI reliable?
The price and inventory of AT49BV3218T-90TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV3218T-90TI is usually 5 days.
3.What payment methods are accepted for AT49BV3218T-90TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV3218T-90TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV3218T-90TI?
AT49BV3218T-90TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV3218T-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 AT49BV3218T-90TI?
For technical support, including AT49BV3218T-90TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV3218T-90TI requirements.
6.How does Aetrix verify that AT49BV3218T-90TI is sourced from the original manufacturer or authorized distributors?
All AT49BV3218T-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 AT49BV3218T-90TI meets industry standards.
7.What is the process for return or replacement of AT49BV3218T-90TI?
All AT49BV3218T-90TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV3218T-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 AT49BV3218T-90TI part is unused and in its original packaging.
Return procedure for AT49BV3218T-90TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV3218T-90TI Tags
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