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Microchip Technology AT49BV320D-70CU
- Part No.:
- AT49BV320D-70CU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 47-VFBGA, CSBGA
- Datasheet:
-
AT49BV320D-70CU.pdf
- Description:
- IC FLASH 32MBIT PARALLEL 47CBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,748
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Product details
Overview
AT49BV320D-70CU 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 for concurrent read/program operations - used in embedded firmware storage and boot code retention for industrial controllers.
For engineers reviewing the AT49BV320D-70CU datasheet, AT49BV320D-70CU pinout, AT49BV320D-70CU application, or AT49BV320D-70CU equivalent, key selection considerations include sector protection flexibility (Softlock/Hardlock + WP/VPP control), CFI compliance for auto-configuration, 100,000 erase cycles endurance, TSOP-48 package compatibility, and dual-word programming acceleration at 10 V VPP.
Technical Context
This parallel-interface NOR Flash implements a command-based Write State Machine (WSM) that manages program, erase, suspend/resume, and status reporting via I/O7–I/O0. It supports Common Flash Interface (CFI) queries for runtime configuration discovery and uses dedicated VPP and WP pins to enforce hardware-level write protection independent of software commands.
The device integrates a 128-bit protection register (factory-programmed Sector A + user-programmable Sector B), flexible sector locking states determined by WP pin level and Softlock/Hardlock bits, and full hardware data protection including VCC sense, power-on delay, and input-level tolerance up to 5.5 V on address/control lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (2,097,152 × 16-bit words) - supports full firmware images for mid-complexity microcontrollers |
| Access Time | 70 ns - enables direct execution (XIP) from Flash in timing-critical boot sequences |
| Supply Voltage | 2.65–3.6 V - compatible with 3.3 V system rails without level-shifting |
| Erase Endurance | 100,000 cycles per sector - suitable for field-upgradable firmware with infrequent reprogramming |
| Sector Architecture | 71 sectors: sixty-three 64 KB + eight 8 KB - allows granular protection of boot code vs. application data |
| Program Time | 10 µs per word - reduces firmware update latency during in-system programming |
| Standby Current | 15 µA - minimizes power draw in sleep-mode embedded systems |
Pinout & Package
AT49BV320D-70CU is available in a 48-lead TSOP-I (Type 1) package with standard JEDEC footprint. Pin functions are electrically defined and validated per Atmel datasheet 3581D–FLASH–2/06.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus supporting full 2M-word addressing; A0–A7 used for command decoding |
| I/O0–I/O15 | Bidirectional Data Bus | 16-bit parallel interface; status register output 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 |
| OE | Output Enable | Active-low output control; toggling CE or OE latches status register contents on falling edge |
| WE | Write Enable | Active-low write strobe; rising edge latches command/data during program/erase sequences |
| VPP | Programming Voltage | Enables erase/program when ≥1.65 V; inhibits operation if <0.4 V; accelerates dual-word program at 10 V |
| WP | Hardware Write Protect | Controls Hardlock override: low = Hardlocked sectors immutable; high = unlockable via software command |
| RESET | Device Initialization | Active-low reset halts ongoing operations and forces return to read mode on deassertion |
| VCCQ | Output Driver Supply | Must tie to VCC for 2.65–3.6 V VOH = VCCQ − 0.1 V; isolates output swing from core logic supply |
Key Features
| Feature | Design Value |
|---|---|
| Erase/Program Suspend | Allows reading or programming any non-erasing sector while another sector erases - enables real-time firmware updates without halting system operation |
| Flexible Sector Protection | Independent Softlock (software-unlockable) and Hardlock (WP-gated) modes per sector - secures boot code while permitting application data updates |
| Common Flash Interface (CFI) | Standardized query structure accessible via 98h command - enables OS/bootloader auto-detection of geometry, timing, and command set |
| 128-bit Protection Register | Factory-programmed 64-bit ID + user-writable/lockable 64-bit sector - supports secure device authentication and anti-cloning in production systems |
| Dual-Word Programming | Accelerated 2-word parallel write at 10 V VPP - reduces manufacturing programming time for high-volume production |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
Use Scenario: Storing certified boot firmware and safety-critical configuration parameters in programmable logic controllers requiring long-term data integrity and field updates. IC Role / Device Role / Timing Role: Non-volatile boot memory providing XIP-capable 70 ns read access and sector-protected reprogramming via JTAG or serial interface. Use Value: 100,000 erase cycles and hardware write protection (VPP/WP) ensure firmware integrity across 10+ year product lifecycles in unattended operation. |
Use Scenario: Holding FDA-approved bootloader and calibration data in portable diagnostic equipment where data corruption must be physically prevented. IC Role / Device Role / Timing Role: Secure, lockable Flash storing immutable boot code (Hardlocked SA0–SA7) and field-updatable application partitions (Softlocked SA8–SA70). Use Value: Dual protection modes + 128-bit register enable traceable device identity and prevent unauthorized firmware modification during service. |
| Automotive Infotainment System BIOS | Networking Equipment Configuration Storage |
Use Scenario: Hosting boot ROM and recovery image in head-unit ECUs subject to AEC-Q100 temperature cycling and ESD stress. IC Role / Device Role / Timing Role: High-reliability parallel Flash with 125°C bias rating, CFI support for multi-vendor BIOS compatibility, and suspend-enabled safe updates. Use Value: TSOP-48 package meets automotive board space constraints; 70 ns access ensures fast cold-boot response within 500 ms startup window. |
Use Scenario: Storing switch/router configuration tables, MAC address pools, and firmware patches in carrier-grade Ethernet equipment. IC Role / Device Role / Timing Role: Sector-erasable non-volatile memory enabling atomic configuration commits and rollback via independent 8 KB sector updates. Use Value: Sixty-three 64 KB sectors allow partitioning of config data, logs, and firmware - minimizing erase wear during frequent small updates. |
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 | 3.0–3.6 V supply only; no VPP pin; lacks CFI support; 100 ns access time | No hardware-accelerated programming; no suspend/resume; limited sector protection granularity | Choose for cost-sensitive designs where CFI and suspend features are unnecessary and 70 ns timing is not required. |
| MX29LV320ETTI-70G | 3.0–3.6 V; 70 ns access; includes CFI and sector protection but no VPP pin or dual-word programming | Relies solely on software locking; no hardware VPP-based program acceleration or voltage-sense inhibit | Prefer when full Atmel-specific command set compatibility is not needed and simplified voltage rail design is prioritized. |
Compared with SST39VF3201-70-4C-EKE and MX29LV320ETTI-70G, AT49BV320D-70CU uniquely combines VPP-controlled program acceleration, dual protection modes (Softlock/Hardlock), and true erase/program suspend - making it optimal for safety-critical or real-time update scenarios where concurrent memory access is mandatory.
Availability
AT49BV320D-70CU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code retention, automotive infotainment BIOS, networking equipment configuration storage, and embedded system recovery image hosting requiring stable component supply across extended product lifecycles.
Supply support for AT49BV320D-70CU 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 legacy Flash product support, quality assurance, and documentation for industrial and automotive applications.
The AT49BV320D-70CU belongs to Atmel's parallel NOR Flash family designed for reliable, in-system programmable firmware storage in resource-constrained embedded systems with stringent data retention and security requirements.
FAQ
What is the operating voltage range for the AT49BV320D-70CU?
The AT49BV320D-70CU operates from 2.65 V to 3.6 V for core logic and I/O. The VPP pin requires either <0.4 V (to inhibit programming) or ≥1.65 V (for normal operation), with 10.0 V enabling accelerated dual-word programming. VCCQ must be tied to VCC to meet output voltage specifications.
Does the AT49BV320D-70CU support hardware write protection independent of software commands?
Yes. The AT49BV320D-70CU provides two hardware-enforced protection mechanisms: the VPP pin disables all program/erase functions below 0.4 V, and the WP pin gates Hardlock sector protection - when WP is low, Hardlocked sectors cannot be unlocked even via software command.
How does the Erase Suspend feature work in the AT49BV320D-70CU?
The AT49BV320D-70CU allows issuing an Erase Suspend command (B0h) to pause an ongoing sector erase. Within 15 µs, the device enters suspend state (SR6 = 1), enabling reads or programming in other sectors. Resume requires the Erase Resume command (D0h); no other erase operations may start during suspend.
What package types are offered for the AT49BV320D-70CU?
The AT49BV320D-70CU is packaged in a 48-lead TSOP-I (Type 1) with standard JEDEC MO-142AC footprint. While the datasheet references a 47-ball CBGA variant (AT49BV320DT), the -70CU suffix specifically denotes the TSOP-48 configuration with 70 ns access time.
Is the AT49BV320D-70CU compatible with Common Flash Interface (CFI) hosts?
Yes. The AT49BV320D-70CU fully implements the CFI specification. Entering CFI Query mode with the 98h command allows host software to read standardized parameter tables at defined addresses, enabling automatic detection of geometry, timing, and command set - critical for bootloader portability.
AT49BV320D-70CU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 47-VFBGA, CSBGA
- 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:
- 47-CBGA (7x10)
AT49BV320D-70CU FAQ
1.How can I place an order for AT49BV320D-70CU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV320D-70CU 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 AT49BV320D-70CU reliable?
The price and inventory of AT49BV320D-70CU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV320D-70CU is usually 5 days.
3.What payment methods are accepted for AT49BV320D-70CU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV320D-70CU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV320D-70CU?
AT49BV320D-70CU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV320D-70CU 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 AT49BV320D-70CU?
For technical support, including AT49BV320D-70CU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV320D-70CU requirements.
6.How does Aetrix verify that AT49BV320D-70CU is sourced from the original manufacturer or authorized distributors?
All AT49BV320D-70CU 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 AT49BV320D-70CU meets industry standards.
7.What is the process for return or replacement of AT49BV320D-70CU?
All AT49BV320D-70CU units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV320D-70CU, 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 AT49BV320D-70CU part is unused and in its original packaging.
Return procedure for AT49BV320D-70CU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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