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Microchip Technology AT49BV802D-70CU
- Part No.:
- AT49BV802D-70CU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-VFBGA, CSPBGA
- Datasheet:
-
AT49BV802D-70CU.pdf
- Description:
- IC FLASH 8MBIT PARALLEL 48CBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,132
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Product details
Overview
AT49BV802D-70CU from Microchip Technology (formerly Atmel) is a 8-Mbit (524,288 × 16-bit / 1,048,576 × 8-bit) 3V-only parallel Flash memory IC used for nonvolatile code and data storage in embedded systems. It supports single-voltage operation (2.65–3.6 V), delivers 70 ns access time, features sector erase architecture with 23 independently lockable sectors, and integrates Common Flash Interface (CFI) for runtime configuration discovery. It is commonly deployed in industrial control firmware storage and boot code retention applications.
For engineers reviewing the AT49BV802D-70CU datasheet, AT49BV802D-70CU pinout, AT49BV802D-70CU application, or AT49BV802D-70CU equivalent, key selection considerations include its 48-pin TSOP package, byte/word mode select via BYTE pin, suspend/resume capability during program/erase, 100,000 erase cycles endurance, and hardware data protection against inadvertent writes.
Technical Context
The AT49BV802D-70CU implements a parallel interface with CE/OE/WE control logic and supports both x8 and x16 data bus configurations selected by the BYTE pin. Its internal write state machine handles embedded program and erase algorithms without external timing control.
It uses command-based operation (e.g., six-byte sector erase, four-byte program) with status reporting via RDY/BUSY pin, I/O7 data polling, and I/O6 toggle bit - all configurable via a programmable status register. Sector lockdown and 128-bit protection register provide hardware-level security for boot code and sensitive configuration data.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (524,288 words × 16 bits or 1,048,576 bytes × 8 bits) - supports dual-bus-width firmware images and legacy 8-bit microcontroller interfaces. |
| Access Time | 70 ns - enables direct execution from flash (XIP) in timing-critical embedded controllers without wait states. |
| Supply Voltage | 2.65 V to 3.6 V - compatible with 3.3 V system rails and eliminates need for separate programming voltage (VPP). |
| Erase Endurance | ≥100,000 cycles - suitable for field-upgradable firmware with frequent patch deployments. |
| Sector Architecture | 23 sectors: fifteen 64 KB (32K-word) + eight 8 KB (4K-word) - allows granular update of boot loader (locked) and application (unlocked) regions. |
| Program Time | 10 µs per byte/word - reduces firmware update latency during in-system programming (ISP). |
| Standby Current | 15 µA - minimizes power draw in always-on industrial monitoring nodes. |
Pinout & Package
AT49BV802D-70CU is packaged in a 48-lead TSOP Type I (thin small-outline package) with 0.5 mm lead pitch, footprint-compatible with JEDEC MO-142AB. Pin functions are electrically identical between TSOP and CBGA variants; this part uses the TSOP variant as indicated by the "-70CU" suffix (U = TSOP).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-word (x16) or 1M-byte (x8) addressing space; A-1 alias on I/O15 in byte mode. |
| I/O0–I/O14 | Data I/O (bidirectional) | Primary data path; I/O15 serves dual role: data (x16) or LSB address (A-1, x8) depending on BYTE pin state. |
| BYTE | Bus Width Select | Logic high → x16 mode (I/O0–I/O15 active); logic low → x8 mode (I/O0–I/O7 active, I/O8–I/O14 tri-stated). |
| CE, OE, WE | Control Enables | Dual-line chip/output enable prevents bus contention; write enable triggers command latching and embedded operations. |
| RDY/BUSY | Open-drain Status Output | Active-low indicates ongoing program/erase; supports wired-OR connection across multiple flash devices on shared bus. |
| RESET | Hardware Initialization | Pulling low halts current operation and forces high-impedance outputs; required to exit suspend or error states. |
Key Features
| Feature | Design Value |
|---|---|
| Erase Suspend/Resume | Interrupt sector erase to read/program other sectors - enables real-time firmware updates without halting system operation. |
| Program Suspend/Resume | Pause byte/word programming to read alternate memory locations - supports background diagnostics during write sequences. |
| Sector Lockdown | Per-sector write-protection activated via command - secures boot code from accidental overwrite while allowing application partition updates. |
| 128-bit Protection Register | Factory-programmed 64-bit ID + user-programmable 64-bit block (lockable) - enables device authentication and secure key storage. |
| Common Flash Interface (CFI) | Standardized query table accessible at fixed addresses - allows bootloader to auto-detect geometry, timings, and commands without hard-coded assumptions. |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
Use Scenario: Storing ladder logic firmware and configuration parameters in programmable logic controllers requiring long-term data integrity and field updates. IC Role / Device Role / Timing Role: Nonvolatile code storage with sector-lock capability to protect bootloader while enabling application partition reprogramming. Use Value: 100,000 erase cycles and hardware sector lockdown ensure 10+ years of reliable field updates without risking boot corruption. | Use Scenario: Holding certified boot firmware and calibration data in FDA-regulated diagnostic equipment where tamper resistance is mandatory. IC Role / Device Role / Timing Role: Secure, CFI-compliant flash memory with 128-bit protection register for cryptographic key binding and anti-cloning. Use Value: Factory-programmed ID block and user-lockable block B prevent unauthorized firmware replacement and support regulatory audit trails. |
| Automotive Body Control Module (BCM) | Network Router Configuration Storage |
Use Scenario: Storing vehicle-specific configuration maps and CAN protocol stacks in body control units operating across extended temperature ranges. IC Role / Device Role / Timing Role: Parallel-interface flash with 70 ns access time and -40°C to +85°C industrial temp grade for deterministic boot timing. Use Value: Single 3.3 V supply and hardware data protection eliminate risk of corruption during battery transients or cold cranking events. | Use Scenario: Maintaining persistent routing tables, VLAN settings, and TLS certificates in enterprise-grade network switches with zero-downtime firmware upgrades. IC Role / Device Role / Timing Role: Dual-mode (x8/x16) flash supporting both legacy 8-bit management microcontrollers and modern 16-bit host processors. Use Value: Suspend/resume functionality allows concurrent packet forwarding and firmware validation during background OTA updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF800A-70-4C-NHE | Same density (8 Mbit), 70 ns access, 3.0–3.6 V supply, but lacks CFI and sector suspend/resume. | No built-in suspend capability limits use in real-time systems requiring concurrent read/write. | Choose when CFI and suspend features are unnecessary and cost sensitivity outweighs flexibility. |
| MX29LV800CTTI-70G | Pin-compatible 48-TSOP, same 8 Mbit density and 70 ns speed, includes CFI but no sector lockdown or 128-bit protection register. | Lacks hardware-level boot sector protection, requiring software-managed write locks. | Select when standardized CFI is required but advanced security features are handled externally. |
Compared with SST39VF800A-70-4C-NHE and MX29LV800CTTI-70G, the AT49BV802D-70CU uniquely combines sector suspend/resume, hardware lockdown, and factory-programmed ID - making it optimal for safety-critical or secure-boot designs where firmware integrity is non-negotiable.
Availability
AT49BV802D-70CU is available at Aetrix Electronics and suitable for industrial control firmware storage, medical device boot code retention, and automotive body control module applications requiring stable component supply and long lifecycle support.
Supply support for AT49BV802D-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 full support for legacy Atmel Flash products including the AT49BV series. The company specializes in microcontrollers, analog, and nonvolatile memory solutions for embedded markets.
The AT49BV802D-70CU belongs to Atmel's parallel Flash memory product line, designed specifically for in-system programmable, secure, and high-reliability code storage in resource-constrained industrial and automotive systems.
FAQ
What is the operating voltage range for the AT49BV802D-70CU?
The AT49BV802D-70CU operates from 2.65 V to 3.6 V - a true single-supply 3V flash memory. This eliminates the need for a separate VPP programming voltage and ensures compatibility with standard 3.3 V logic systems. Operation below 2.65 V disables programming via internal VCC sense circuitry, preventing accidental writes during brown-out conditions.
Does the AT49BV802D-70CU support both 8-bit and 16-bit data bus interfaces?
Yes, the AT49BV802D-70CU supports both x8 and x16 configurations via the BYTE pin. When BYTE = HIGH, I/O0–I/O15 are active for 16-bit operation; when BYTE = LOW, only I/O0–I/O7 are active (x8), and I/O15 functions as A-1 (LSB address). This dual-mode capability allows seamless integration with legacy 8-bit microcontrollers and modern 16-bit hosts without redesigning the PCB layout.
How does sector lockdown work on the AT49BV802D-70CU?
Sector lockdown on the AT49BV802D-70CU is enabled per sector using a six-cycle command sequence. Once locked, a sector becomes read-only - immune to program and erase commands until the next power cycle or RESET assertion. This feature is used to protect boot code stored in SA0–SA7 (the 8K sectors), ensuring system reliability even during field firmware updates to other partitions.
What methods does the AT49BV802D-70CU provide to detect end-of-erase or end-of-program?
The AT49BV802D-70CU offers three concurrent status detection methods: (1) RDY/BUSY pin (open-drain active-low signal), (2) Data Polling on I/O7 (complement-to-data or high-assertion depending on config register), and (3) Toggle Bit on I/O6 (toggling stops upon completion). All methods are usable simultaneously and supported regardless of whether the device is in x8 or x16 mode.
Is the AT49BV802D-70CU RoHS compliant and halogen-free?
Yes, the AT49BV802D-70CU is Green (Pb/Halide-free) per manufacturer documentation. It meets RoHS Directive 2011/65/EU requirements and contains no brominated flame retardants (BFRs), chlorinated flame retardants (CFRs), polybrominated biphenyls (PBBs), or polybrominated diphenyl ethers (PBDEs). The TSOP package uses matte tin lead finish and halogen-free molding compound.
AT49BV802D-70CU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 48-VFBGA, CSPBGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 8Mbit
- Memory Organization:
- 512K 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-CBGA (6x8)
AT49BV802D-70CU FAQ
1.How can I place an order for AT49BV802D-70CU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV802D-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 AT49BV802D-70CU reliable?
The price and inventory of AT49BV802D-70CU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV802D-70CU is usually 5 days.
3.What payment methods are accepted for AT49BV802D-70CU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV802D-70CU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV802D-70CU?
AT49BV802D-70CU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV802D-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 AT49BV802D-70CU?
For technical support, including AT49BV802D-70CU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV802D-70CU requirements.
6.How does Aetrix verify that AT49BV802D-70CU is sourced from the original manufacturer or authorized distributors?
All AT49BV802D-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 AT49BV802D-70CU meets industry standards.
7.What is the process for return or replacement of AT49BV802D-70CU?
All AT49BV802D-70CU units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV802D-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 AT49BV802D-70CU part is unused and in its original packaging.
Return procedure for AT49BV802D-70CU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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