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Microchip Technology AT49BV320C-70TI
- Part No.:
- AT49BV320C-70TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV320C-70TI.pdf
- Description:
- IC FLASH 32MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,357
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Product details
Overview
AT49BV320C-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 suspend/resume capability for concurrent read/program operations. It is used in embedded firmware storage, boot code retention, and industrial controller configuration memory.
For engineers reviewing the AT49BV320C-70TI datasheet, AT49BV320C-70TI pinout, AT49BV320C-70TI application, or AT49BV320C-70TI equivalent, key selection considerations include its TSOP-48 package, 12 µs word program time, CFI-compliant interface, flexible Softlock/Hardlock sector protection, and VPP/VPPS-enabled hardware write protection.
Technical Context
The AT49BV320C-70TI implements a command-driven Write State Machine (WSM) that manages internal program/erase pulses, status register polling (SR7–SR0), and hardware-based protection via VPP voltage sensing and WP pin control. Its dual-voltage I/O architecture separates VCCQ (output supply) from VCC (core supply), enabling 1.8–2.2 V output levels while maintaining 2.65–3.0 V core operation.
It supports Common Flash Interface (CFI) query mode (command 98h), enabling runtime detection of device geometry, timing parameters, and supported features. Sector erase and word program operations are fully suspendable-allowing reads from unlocked sectors during active erase or program cycles-with dedicated status bits (ESS, PSS) and resume commands (D0h).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (2,097,152 × 16-bit words); enables full firmware image storage for mid-tier microcontrollers. |
| Access Time | 70 ns; ensures compatibility with 14 MHz bus timing without wait states in legacy 80C51/68K-based systems. |
| Supply Voltage | 2.65–3.6 V single supply; eliminates need for separate VPP programming voltage in-system. |
| Word Program Time | 12 µs typical; reduces firmware update latency in field-upgradeable devices. |
| Sector Erase Time | 300 ms max per sector; balances speed and reliability for partial reconfiguration. |
| Erase Cycles | ≥100,000 per sector; supports long-life logging and parameter storage in industrial controllers. |
| Standby Current | 13 µA; critical for battery-backed real-time clock modules and low-power HMI subsystems. |
Pinout & Package
AT49BV320C-70TI is available in a 48-lead TSOP-I (Thin Small Outline Package) with standard JEDEC MO-141AC footprint. Pin assignment matches Type 1 configuration: A0–A20 address inputs, I/O0–I/O15 bidirectional data bus, CE/OE/WE control lines, RESET, VPP, WP, VCCQ, and dual GND pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus supporting full 2M-word addressing; A8–A20 required for sector selection in erase commands. |
| I/O0–I/O15 | Bidirectional Data Bus | 16-bit parallel interface; outputs status register bits SR7–SR0 on I/O7–I/O0 during Read Status Register mode. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read access; prevents bus contention in multi-device systems. |
| OE | Output Enable | Active-low output gate; toggling OE or CE latches status register contents to avoid read corruption. |
| WE | Write Enable | Active-low write strobe; rising edge latches command/data during program/erase sequences. |
| VPP | Write Protection Voltage | Must be ≥1.5 V for program/erase; <0.4 V disables all write functions-hardware failsafe against spurious writes. |
| WP | Write Protect Input | Controls Hardlock override: low = permanent sector lock; high = unlock possible via software command. |
| RESET | Device Initialization | Active-low reset halts ongoing WSM operation and forces return to read mode on release. |
Key Features
| Feature | Design Value |
|---|---|
| Suspend/Resume for Erase & Program | Enables concurrent read access from unlocked sectors during active erase/program-critical for real-time OS boot loaders. |
| Flexible Sector Protection (Softlock/Hardlock) | Two independent lock modes: Softlock allows dynamic unlock via command; Hardlock + WP pin provides tamper-resistant boot sector protection. |
| 128-bit Protection Register | Factory-programmed 64-bit ID + user-programmable 64-bit locked sector B-supports secure firmware signing and anti-cloning. |
| Common Flash Interface (CFI) | Standardized query table (entry command 98h) enables automatic driver initialization and multi-vendor flash abstraction layers. |
| Hardware Data Protection | VCC sense (<1.8 V inhibits program), VPP monitoring (SR3 flag), and control-line gating (OE/CE/WE logic) prevent accidental writes during power ramp. |
Applications
| Industrial PLC Firmware Storage | Automotive ECU Boot Memory |
|---|---|
|
Use Scenario: Storing ladder logic programs and I/O configuration tables in programmable logic controllers with field-upgrade capability. IC Role / Device Role / Timing Role: Nonvolatile boot and application code storage with sector-level erase granularity for incremental updates. Use Value: 71-sector architecture allows updating communication stack (SA0–SA7) without erasing safety-critical control routines (SA8–SA70), minimizing downtime. |
Use Scenario: Holding bootloader and calibration data in engine control units requiring ASIL-B compliant memory integrity. IC Role / Device Role / Timing Role: Primary boot ROM with hardware-protected boot sector (Hardlock + WP pin) and CFI-assisted driver initialization. Use Value: VPP status bit (SR3) and Clear Status Register command enable deterministic error recovery after brown-out events during flash programming. |
| Medical Device Configuration Memory | Networking Equipment Image Storage |
|
Use Scenario: Retaining user-adjustable therapy parameters and device calibration coefficients in portable infusion pumps. IC Role / Device Role / Timing Role: Parameter EEPROM replacement with 100k-cycle endurance and 13 µA standby current for battery operation. Use Value: Softlock protection allows clinical staff to update therapy profiles via USB host while keeping factory calibration data permanently locked. |
Use Scenario: Storing multiple firmware images (primary/backup/recovery) in enterprise switches and routers. IC Role / Device Role / Timing Role: Dual-image storage with independent sector locking-enabling atomic fail-safe firmware rollback. Use Value: Suspend/resume capability permits reading active image while programming backup image, eliminating service interruption during upgrades. |
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 | 32 Mbit, 70 ns, 2.7–3.6 V; lacks VPP pin and CFI support; uses different command set. | No hardware VPP-based write inhibit; requires software-only protection schemes. | Choose when cost sensitivity outweighs need for hardware write protection and CFI auto-detection. |
| MX29LV320ETTI-70G | 32 Mbit, 70 ns, 2.7–3.6 V; includes CFI but no VPP pin; supports top/bottom boot block only (no flexible sector lock). | Lacks per-sector Hardlock + WP integration; boot sector protection is fixed by pin strapping. | Select for designs already using Macronix toolchains and where boot-block-only protection suffices. |
Compared with SST39VF3201-70-4C-EKE and MX29LV320ETTI-70G, the AT49BV320C-70TI uniquely combines VPP-based hardware write disable, per-sector Softlock/Hardlock, and full CFI compliance-making it optimal for safety-critical or field-upgradable systems requiring robust, multi-layered protection.
Availability
AT49BV320C-70TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive ECU boot memory, medical device configuration memory, networking equipment image storage, and embedded controller code retention requiring stable component supply across extended product lifecycles.
Supply support for AT49BV320C-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 manufacturing continuity for the AT49BV series. The company specializes in secure, reliable nonvolatile memory and microcontroller solutions for industrial and automotive markets.
The AT49BV320C-70TI belongs to Atmel's legacy parallel Flash memory product line, designed specifically for in-system programmable boot and firmware storage in resource-constrained embedded systems with strict reliability and data integrity requirements.
FAQ
What is the function of the VPP pin on the AT49BV320C-70TI?
The VPP pin on the AT49BV320C-70TI serves as a hardware write-protection enable signal. When VPP is below 0.4 V, all program and erase operations are inhibited-even if correct command sequences are issued. When VPP is at or above 1.5 V, normal programming and erasing are permitted. This provides a fail-safe mechanism against unintended writes during power-up or brown-out conditions, and the AT49BV320C-70TI status register reports VPP status via SR3.
How does sector protection work on the AT49BV320C-70TI?
The AT49BV320C-70TI implements two independent sector protection modes: Softlock (software-unlockable) and Hardlock (hardware-gated by WP pin). Each of the 71 sectors can be individually configured. Softlock allows unlocking via a two-cycle command; Hardlock remains active unless WP is pulled high. At power-up, all sectors default to Softlock. The AT49BV320C-70TI status register reflects lock state via SR1, and sector lock status is readable at I/O1/I/O0 addresses within each sector.
Does the AT49BV320C-70TI support suspend/resume during erase or program operations?
Yes, the AT49BV320C-70TI supports both Erase Suspend and Program Suspend via dedicated command codes (B0h). After issuing suspend, the device halts the active operation within 15 µs (erase) or 20 µs (program), allowing reads or writes to other unlocked sectors/words. Resume is triggered with D0h. While suspended, only specific commands-including Read Status Register and Product ID Entry-are valid. This capability is integral to the AT49BV320C-70TI's Write State Machine architecture.
What is the purpose of the 128-bit protection register in the AT49BV320C-70TI?
The AT49BV320C-70TI contains a 128-bit protection register split into two 64-bit sectors: Sector A (factory-programmed, immutable) and Sector B (user-programmable and optionally lockable). Sector B can be permanently locked using the Lock Protection Register command (C0h/80h/FFFDh), preventing further writes. This feature enables secure firmware identification, cryptographic key storage, and anti-counterfeiting in systems using the AT49BV320C-70TI as trusted boot memory.
Is the AT49BV320C-70TI compatible with Common Flash Interface (CFI) hosts?
Yes, the AT49BV320C-70TI fully supports CFI per JEDEC JESD68-A. Entering CFI Query mode requires writing 98h to any address, after which standardized parameter tables-including device geometry, timing values, and command sets-are readable at defined offsets. This allows generic flash drivers to auto-configure for the AT49BV320C-70TI without hard-coded vendor-specific logic, simplifying migration and second-source validation.
AT49BV320C-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
AT49BV320C-70TI FAQ
1.How can I place an order for AT49BV320C-70TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV320C-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 AT49BV320C-70TI reliable?
The price and inventory of AT49BV320C-70TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV320C-70TI is usually 5 days.
3.What payment methods are accepted for AT49BV320C-70TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV320C-70TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV320C-70TI?
AT49BV320C-70TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV320C-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 AT49BV320C-70TI?
For technical support, including AT49BV320C-70TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV320C-70TI requirements.
6.How does Aetrix verify that AT49BV320C-70TI is sourced from the original manufacturer or authorized distributors?
All AT49BV320C-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 AT49BV320C-70TI meets industry standards.
7.What is the process for return or replacement of AT49BV320C-70TI?
All AT49BV320C-70TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV320C-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 AT49BV320C-70TI part is unused and in its original packaging.
Return procedure for AT49BV320C-70TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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