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Microchip Technology AT49BV802DT-70CU
- Part No.:
- AT49BV802DT-70CU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-VFBGA, CSPBGA
- Datasheet:
-
AT49BV802DT-70CU.pdf
- Description:
- IC FLASH 8MBIT PARALLEL 48CBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,100
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Product details
Overview
AT49BV802DT-70CU from Microchip Technology (formerly Atmel) is an 8-Mbit (512K × 16 / 1M × 8) 3.3V-only parallel Flash memory with 70 ns access time, sector erase architecture (15 × 64KB + 8 × 8KB), and suspend/resume capability for in-system programming. It supports byte/word configuration via BYTE pin and operates in TSOP-48 or CBGA-48 packages for embedded boot code storage.
For engineers reviewing the AT49BV802DT-70CU datasheet, AT49BV802DT-70CU pinout, AT49BV802DT-70CU application, or AT49BV802DT-70CU equivalent, key selection considerations include sector lockdown support, CFI compliance, RDY/BUSY signaling, 100,000 erase cycles, and single-supply 2.65–3.6V operation for industrial microcontroller boot memory.
Technical Context
The AT49BV802DT-70CU implements a parallel x16/x8 interface with CE/OE/WE control logic and a dedicated BYTE pin to select data bus width. Its internal write state machine handles embedded program/erase algorithms without external timing control.
It features three status detection methods-Data Polling (I/O7), Toggle Bit (I/O6), and RDY/BUSY open-drain output-and supports hardware reset-initiated recovery from failed operations. Sector Lockdown and 128-bit Protection Register provide secure boot code and user-defined security partitioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (524,288 × 16 or 1,048,576 × 8) |
| Access Time | 70 ns - guarantees read latency under worst-case VCC and temperature conditions |
| Supply Voltage | 2.65–3.6V - enables direct connection to 3.3V logic rails without level shifting |
| Erase Cycles | ≥100,000 per sector - ensures long-term field reliability for firmware update partitions |
| Program Time | 10 µs per byte/word - reduces in-system programming overhead during field upgrades |
| Sector Architecture | 23 sectors: 15 × 64KB + 8 × 8KB - enables granular protection of boot code and application data |
| Standby Current | 15 µA - minimizes power draw in sleep-mode embedded systems |
Pinout & Package
AT49BV802DT-70CU is available in 48-lead TSOP (Type 1) and 48-ball CBGA packages. Both variants share identical pin functions and signal mapping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-word addressing in x16 mode; A-1 alias on I/O15 in x8 mode |
| I/O0–I/O14 | Data I/O (x16) | Bi-directional data lines active in word mode; I/O8–I/O14 tri-stated in byte mode |
| I/O15 / A-1 | Mode-Dependent Pin | In x16: data bit 15; in x8: LSB address bit for accessing upper/lower byte of protection register |
| BYTE | Bus Width Select | Logic high = x16 mode (I/O0–I/O15 active); logic low = x8 mode (I/O0–I/O7 active, I/O15 = A-1) |
| CE, OE, WE | Control Enables | Three independent enables prevent bus contention; dual-line (CE+OE) read control matches standard EPROM timing |
| RDY/BUSY | Open-Drain Status | Active-low indicates ongoing program/erase; supports wired-OR with multiple devices on shared bus |
| RESET | Hardware Initialization | Pulsing low ≥500 ns forces return to read/standby mode and clears suspend states |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Suspend/Resume | Allows reading from non-erasing sectors while erasing another - critical for real-time firmware updates without halting system execution |
| Single-Pulse Program Mode | Reduces software overhead by replacing 4-cycle command sequence with single WE pulse after 6-byte entry - accelerates field programming |
| 128-bit Protection Register | Factory-programmed Block A + user-programmable Block B (lockable) - enables secure device authentication and anti-cloning |
| Common Flash Interface (CFI) | Standardized query table at fixed addresses - enables OS/driver auto-detection of geometry, timings, and commands without hard-coded algorithms |
| Hardware Data Protection | VCC sense (<1.8V inhibit), 10 ms power-on delay, and CE/OE/WE gating - prevents spurious writes during brown-out or power ramp |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Loader |
|---|---|
Use Scenario: Storing certified boot firmware and safety-critical configuration in programmable logic controllers operating in harsh EMI environments. IC Role / Device Role / Timing Role: Non-volatile boot memory mapped to microcontroller's address space; accessed via parallel bus during cold start and warm reset. Use Value: Sector lockdown protects bootloader region from accidental overwrite; 70 ns access ensures deterministic startup timing within 100 ms safety window. | Use Scenario: Holding FDA-compliant boot code and calibration data in portable diagnostic equipment requiring traceable firmware revisions. IC Role / Device Role / Timing Role: Secure x16 Flash memory with CFI support for automated driver initialization and field-upgrade verification. Use Value: 128-bit protection register stores cryptographic keys; 100,000 erase cycles support >5 years of scheduled calibration updates. |
| Automotive Infotainment Head Unit | Network Router Boot Image |
Use Scenario: Hosting primary boot image and fail-safe recovery partition in automotive-grade infotainment systems with ASIL-B requirements. IC Role / Device Role / Timing Role: Parallel-connected Flash providing fast read access to ARM Cortex-A application processor during power-on sequence. Use Value: Dual-sector erase architecture isolates recovery image (locked SA0–SA7) from main firmware (erasable SA8–SA22), enabling safe over-the-air updates. | Use Scenario: Storing verified U-Boot and Linux kernel images in carrier-class edge routers requiring zero-downtime firmware rollbacks. IC Role / Device Role / Timing Role: x8-configured Flash interfaced to MIPS-based SoC; RDY/BUSY line synchronized with DMA controller for background flash operations. Use Value: Erase suspend allows concurrent packet forwarding and firmware validation; CFI enables automatic compatibility check across router generations. |
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-EKE | Same density (8 Mbit), 70 ns access, but uses SST's SuperFlash technology with faster 18 µs program time and no CFI support | Lacks sector lockdown and 128-bit protection register; requires custom driver for status polling | Preferred where fastest program time dominates over security and standardization needs |
| MX29LV800CTTI-70G | Pin-compatible 8 Mbit Flash with 70 ns access, supports CFI and sector protection, but only 10,000 erase cycles and no erase suspend | No suspend/resume capability limits real-time update scenarios; lower endurance affects long-life deployments | Valid drop-in replacement if suspend functionality and >100K cycles are not required |
Compared with SST39VF800A-70-4C-EKE and MX29LV800CTTI-70G, the AT49BV802DT-70CU uniquely combines CFI compliance, hardware-enforced sector lockdown, and full erase/program suspend - making it the only option among the three qualified for safety-critical, updatable embedded boot memory with field-proven 100,000-cycle endurance.
Availability
AT49BV802DT-70CU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot loaders, automotive infotainment head units, and network router boot images requiring stable component supply across multi-year production lifecycles.
Supply support for AT49BV802DT-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 AT49BV802DT-70CU.
This device belongs to Atmel's parallel Flash memory product line, designed specifically for reliable, in-system programmable boot code storage in resource-constrained embedded systems with strict timing and security requirements.
FAQ
What is the difference between AT49BV802D and AT49BV802DT?
The AT49BV802DT-70CU is the top-boot configuration variant of the AT49BV802D family, meaning its smallest-addressed sector (SA0) contains boot code and is located at the lowest memory address (0x000000). The base AT49BV802D part number may refer to bottom-boot versions. This distinction directly affects sector lockdown assignment and bootloader placement in memory-mapped systems. The AT49BV802DT-70CU retains all core specifications - 70 ns access, 8 Mbit density, and CFI support - but enforces top-boot alignment for compatibility with standard ARM/PowerPC boot ROM expectations.
Does AT49BV802DT-70CU support both x8 and x16 data bus widths?
Yes, the AT49BV802DT-70CU supports configurable x8 or x16 operation via the BYTE pin. When BYTE = HIGH, the device operates in 16-bit mode with I/O0–I/O15 active; when BYTE = LOW, it operates in 8-bit mode with only I/O0–I/O7 active and I/O15 repurposed as A-1 for LSB address access. This flexibility allows direct integration with 8-bit microcontrollers or 16-bit processors without external glue logic. The AT49BV802DT-70CU's internal address decoding automatically adapts to the selected mode, maintaining full 8 Mbit capacity in both configurations.
How does sector lockdown work on AT49BV802DT-70CU?
Sector lockdown on the AT49BV802DT-70CU is enabled per-sector using a six-bus-cycle command sequence targeting a specific sector address. Once locked, that sector becomes permanently read-only until the next power cycle or RESET pulse - preventing accidental or malicious erasure or programming. Lockdown status is verified by reading address 00002H within the sector: I/O0 = HIGH indicates lockdown active. The AT49BV802DT-70CU supports independent lockdown of any combination of its 23 sectors, enabling secure separation of bootloader (e.g., SA0–SA7) from application firmware (SA8–SA22).
Can AT49BV802DT-70CU be used with 5V-tolerant microcontrollers?
Yes - the AT49BV802DT-70CU's address and control inputs (A0–A18, CE, OE, WE, RESET, BYTE) tolerate input voltages up to 5.5V even when VCC is 3.3V, allowing direct connection to 5V logic families without level shifters. However, I/O pins are limited to 0–VCC+0.6V (≤4.2V), so bidirectional data lines must be interfaced through voltage translators or clamping circuits when connecting to true 5V microcontrollers. This 5V-tolerant input design simplifies board layout for mixed-voltage systems while preserving the AT49BV802DT-70CU's 3.3V core operation and low-power benefits.
What status detection methods does AT49BV802DT-70CU provide for program/erase completion?
The AT49BV802DT-70CU offers three independent status detection methods: (1) RDY/BUSY open-drain output (active-low), (2) Data Polling on I/O7 (complement-to-data or high-on-complete depending on config register), and (3) Toggle Bit on I/O6 (toggles during operation, stops when complete). All three can be used simultaneously or selectively. The configuration register (set via Set Configuration Register command) determines whether the device auto-returns to read mode post-operation (00) or requires Product ID Exit command (01). This multi-method approach ensures robust timing-independent detection in diverse system architectures using the AT49BV802DT-70CU.
AT49BV802DT-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)
AT49BV802DT-70CU FAQ
1.How can I place an order for AT49BV802DT-70CU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV802DT-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 AT49BV802DT-70CU reliable?
The price and inventory of AT49BV802DT-70CU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV802DT-70CU is usually 5 days.
3.What payment methods are accepted for AT49BV802DT-70CU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV802DT-70CU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV802DT-70CU?
AT49BV802DT-70CU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV802DT-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 AT49BV802DT-70CU?
For technical support, including AT49BV802DT-70CU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV802DT-70CU requirements.
6.How does Aetrix verify that AT49BV802DT-70CU is sourced from the original manufacturer or authorized distributors?
All AT49BV802DT-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 AT49BV802DT-70CU meets industry standards.
7.What is the process for return or replacement of AT49BV802DT-70CU?
All AT49BV802DT-70CU units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV802DT-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 AT49BV802DT-70CU part is unused and in its original packaging.
Return procedure for AT49BV802DT-70CU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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