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Microchip Technology AT49BV320CT-70TI
- Part No.:
- AT49BV320CT-70TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV320CT-70TI.pdf
- Description:
- IC FLASH 32MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49BV320CT-70TI from Microchip Technology (formerly Atmel) is a 32-Mbit (2M × 16) single-supply Flash memory IC operating at 2.65–3.6 V, featuring 70 ns access time, sector erase architecture with 71 independently lockable sectors, and integrated Erase/Program Suspend functionality for concurrent read/program operations during background erase. It is used in embedded firmware storage for industrial controllers requiring in-system reprogramming.
For engineers reviewing the AT49BV320CT-70TI datasheet, AT49BV320CT-70TI pinout, AT49BV320CT-70TI application, or AT49BV320CT-70TI equivalent, key selection considerations include TSOP-48/CBGA-47 package compatibility, CFI-compliant configuration detection, flexible Softlock/Hardlock sector protection, VPP-enabled hardware write protection, and 100,000-cycle endurance for field-upgradable systems.
Technical Context
The AT49BV320CT-70TI implements a command-based Write State Machine (WSM) that executes embedded erase and program algorithms without external timing control. Its dual-voltage architecture separates VCC (2.65–3.6 V) for core logic and VCCQ (2.0 V ±10% optional) for I/O levels, enabling mixed-voltage system interfacing.
It supports Common Flash Interface (CFI) query mode via 98h command for runtime device identification and parameter discovery, and uses a 128-bit protection register with factory-programmed Sector A and user-programmable, lockable Sector B for secure boot or configuration data storage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (2,097,152 × 16-bit words), enabling full firmware image storage for mid-tier microcontrollers |
| Access Time | 70 ns maximum - ensures deterministic read latency for real-time interrupt response in control applications |
| Supply Voltage | 2.65 V to 3.6 V single supply - eliminates need for auxiliary voltage rails in 3.3 V system designs |
| Erase Architecture | 71 sectors: sixty-three 64 KB + eight 8 KB sectors - allows granular firmware partitioning (e.g., bootloader vs. application) |
| Program/Erase Endurance | Minimum 100,000 erase cycles - supports frequent field updates in industrial telemetry gateways |
| Suspend Capability | Erase Suspend (15 µs max) and Program Suspend (20 µs max) - enables foreground reads while background erase proceeds |
| Protection Mechanism | VPP pin <0.4 V inhibits programming; WP pin enables Hardlock override - provides hardware-fail-safe write blocking |
Pinout & Package
AT49BV320CT-70TI is available in 48-pin TSOP Type I (thin small-outline package) and 47-ball CBGA (chip-scale ball grid array) packages. The -70TI suffix denotes the TSOP-48 variant with 70 ns speed grade and industrial temperature range (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus supporting full 2M-word addressing; A8–A20 ignored during CFI/Product ID modes |
| I/O0–I/O15 | Bidirectional Data Bus | 16-bit parallel interface; outputs driven to VCCQ − 0.1 V level, not VCC - requires VCCQ regulation for 1.8 V I/O |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read - prevents bus contention in shared-memory systems |
| OE | Output Enable | Active-low output control; toggling CE or OE latches status register bits - required for reliable polling of WSM completion |
| WE | Write Enable | Active-low write strobe; rising edge latches command/data during two-cycle sequences (e.g., Sector Erase Setup) |
| VPP | Write Protection Voltage | Must be ≥1.5 V for program/erase; <0.4 V disables all writes - hardwired to VCC or controlled via external switch for security |
| WP | Write Protect Input | Controls Hardlock override: low = permanent sector lock; high = unlock possible via software command |
| RESET | Hardware Reset | Active-high input; forces high-impedance outputs and returns device to read mode - synchronizes flash state after power-on or fault recovery |
| VCCQ | Output Power Supply | Separate 2.0 V ±10% rail for I/O drivers - enables 1.8 V system interfacing while maintaining 2.65–3.6 V core operation |
| NC | No Connect | Pin 9 (TSOP) and Ball D1 (CBGA) are unconnected - must be left floating or tied to ground per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Flexibility | 71 individually erasable sectors (63 × 64 KB + 8 × 8 KB) allow selective firmware update without full-chip erase - reduces downtime in OTA deployments |
| Erase/Program Suspend | Hardware-supported suspend/resume enables concurrent read access to non-erasing sectors - critical for real-time logging during firmware upgrade |
| Two-Tier Sector Protection | Softlock (software-unlockable) and Hardlock (WP-gated) modes per sector - isolates bootloader (Hardlocked) from field-updatable application (Softlocked) |
| 128-bit Protection Register | Factory-programmed 64-bit Sector A + user-writable, lockable Sector B - stores cryptographic keys or calibration data with irreversible write-protection |
| Common Flash Interface (CFI) | Standardized query table accessible via 98h command - enables generic flash driver support across multiple vendors in BSP development |
| Hardware Data Protection | VCC sense (<1.8 V inhibits program), 10 ms VCC power-on delay, and VPP power-on delay (100 ns) prevent spurious writes during power ramp - improves system robustness |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Partition |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments with ambient temperatures up to +85°C. IC Role / Device Role / Timing Role: Non-volatile code storage with in-system reprogrammability; 70 ns access ensures deterministic scan-cycle timing for motion control loops. Use Value: Sector-level erase enables updating only the application layer while preserving calibrated I/O module parameters in protected sectors. |
Use Scenario: Securing boot code and regulatory-critical calibration data in FDA-cleared diagnostic equipment requiring traceable firmware revisions. IC Role / Device Role / Timing Role: Trusted boot source with hardware-enforced write protection; VPP and WP pins provide dual-layer physical security against unauthorized modification. Use Value: 128-bit protection register stores device-specific serial numbers and encryption keys, with Sector B lockout preventing post-deployment tampering. |
| Telecom Base Station Configuration | Automotive Infotainment Update Cache |
Use Scenario: Holding radio protocol stacks and site-specific configuration profiles in remote cellular base stations subject to frequent over-the-air updates. IC Role / Device Role / Timing Role: High-endurance Flash memory supporting >100,000 field updates; CFI interface allows automatic driver adaptation across hardware revisions. Use Value: Erase suspend permits continuous packet forwarding during background sector reprogramming - maintains network uptime during maintenance windows. |
Use Scenario: Caching downloaded infotainment OS patches in automotive head units before atomic installation, requiring fast random-access reads during validation. IC Role / Device Role / Timing Role: Low-power code storage with 13 µA standby current; TSOP-48 footprint fits constrained PCB space near SoC memory bus. Use Value: Flexible top/bottom boot block configuration supports dual-image boot schemes for fail-safe A/B firmware rollouts. |
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, 32 Mbit (2M × 16), same TSOP-48 package but lacks CFI and 128-bit protection register | No built-in sector lock status reporting or hardware VPP gating - requires external logic for equivalent security | Choose when CFI and advanced protection are unnecessary and cost sensitivity outweighs feature parity |
| MX29LV320ETTI-70G | 3.0 V core, 70 ns, 32 Mbit (2M × 16), TSOP-48, supports CFI but uses different command set and lacks Erase Suspend | No suspend/resume capability - prohibits concurrent read/erase, limiting real-time update viability | Prefer where legacy driver compatibility exists and background erase concurrency is not required |
Compared with SST39VF3201-70-4C-EKE and MX29LV320ETTI-70G, the AT49BV320CT-70TI uniquely delivers integrated Erase Suspend, dual-mode sector locking with WP/VPP hardware gating, and a factory-programmed 128-bit protection register - making it the only option among the three suitable for safety-critical, field-upgradable embedded systems requiring both performance and security.
Availability
AT49BV320CT-70TI is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics equipment, telecom infrastructure, and automotive infotainment systems requiring stable component supply across extended product lifecycles.
Supply support for AT49BV320CT-70TI 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 technical and supply chain support for legacy Atmel Flash products including the AT49BV320CT-70TI.
The AT49BV320C(T) series was designed for embedded systems requiring reliable, in-system programmable non-volatile storage with hardware-assisted security and real-time update capabilities - targeting industrial control, medical, and communications markets.
FAQ
What is the operating temperature range for the AT49BV320CT-70TI?
The AT49BV320CT-70TI is rated for industrial temperature operation from –40°C to +85°C. This range is validated across all electrical specifications including 70 ns access time, 12 mA active current, and reliable sector erase functionality. The "TI" suffix explicitly denotes this industrial-grade qualification, distinguishing it from commercial variants.
Does the AT49BV320CT-70TI support true 1.8 V I/O interfacing?
Yes, the AT49BV320CT-70TI supports 1.8 V I/O through its dedicated VCCQ pin, which must be regulated to 2.0 V ±10%. When VCCQ is set to this level, output high levels are VCCQ − 0.1 V, enabling safe interfacing with 1.8 V logic families. Core VCC remains at 2.65–3.6 V for internal operation.
How does the VPP pin function in the AT49BV320CT-70TI?
In the AT49BV320CT-70TI, the VPP pin acts as a hardware write-enable gate: program and erase operations are inhibited when VPP < 0.4 V, and enabled when VPP ≥ 1.5 V. It must never be left floating. This provides a physical layer of protection against accidental writes during power transitions or ESD events.
Can the AT49BV320CT-70TI perform simultaneous read and erase operations?
Yes, the AT49BV320CT-70TI supports Erase Suspend: issuing the B0h command halts an ongoing sector erase within 15 µs, allowing immediate reads or word programming from any other sector. The erase resumes upon receiving the D0h command - enabling real-time data access during firmware updates.
What is the purpose of the 128-bit protection register in the AT49BV320CT-70TI?
The AT49BV320CT-70TI's 128-bit protection register contains factory-programmed Sector A (read-only, unique identifier) and user-programmable Sector B (lockable via C0h command). Once locked, Sector B cannot be rewritten - securing cryptographic keys, calibration constants, or regulatory data against field tampering.
Is the AT49BV320CT-70TI pin-compatible with other members of the AT49BV320C(T) family?
Yes, the AT49BV320CT-70TI shares identical pinout and package dimensions with all AT49BV320C(T) variants in TSOP-48, including speed grades (e.g., -90TI) and boot configurations (top/bottom). However, timing parameters and VPP requirements remain specific to the -70TI speed bin and must be verified in system-level timing analysis.
AT49BV320CT-70TI 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:
- 2M x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 120µs
- Access Time:
- 70 ns
- Voltage - Supply:
- 2.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSOP
AT49BV320CT-70TI FAQ
1.How can I place an order for AT49BV320CT-70TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV320CT-70TI 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 AT49BV320CT-70TI reliable?
The price and inventory of AT49BV320CT-70TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV320CT-70TI is usually 5 days.
3.What payment methods are accepted for AT49BV320CT-70TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV320CT-70TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV320CT-70TI?
AT49BV320CT-70TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV320CT-70TI 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 AT49BV320CT-70TI?
For technical support, including AT49BV320CT-70TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV320CT-70TI requirements.
6.How does Aetrix verify that AT49BV320CT-70TI is sourced from the original manufacturer or authorized distributors?
All AT49BV320CT-70TI 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 AT49BV320CT-70TI meets industry standards.
7.What is the process for return or replacement of AT49BV320CT-70TI?
All AT49BV320CT-70TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV320CT-70TI, 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 AT49BV320CT-70TI part is unused and in its original packaging.
Return procedure for AT49BV320CT-70TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV320CT-70TI Tags
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