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Microchip Technology AT49BV802A-70TU
- Part No.:
- AT49BV802A-70TU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV802A-70TU.pdf
- Description:
- IC FLASH 8MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,093
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Product details
Overview
AT49BV802A-70TU from Microchip Technology (formerly Atmel) is an 8-Mbit (524,288 × 16 or 1,048,576 × 8) single-supply Flash memory IC used for nonvolatile code and data storage in embedded systems. It supports 2.65–3.6 V operation, delivers 70 ns access time, features sector erase architecture with 15 × 64 KB + 8 × 8 KB sectors, and enables in-system programming via CE/OE/WE control logic.
For engineers reviewing the AT49BV802A-70TU datasheet, AT49BV802A-70TU pinout, AT49BV802A-70TU application, or AT49BV802A-70TU equivalent, key selection considerations include its TSOP-48 package, byte/word mode select via BYTE pin, suspend/resume capability for concurrent read/program operations, CFI compliance for auto-configuration, and 128-bit protection register for secure boot code storage.
Technical Context
The AT49BV802A-70TU implements a command-register-based Flash architecture with dual-mode (x8/x16) I/O interface controlled by the BYTE pin. Its internal write state machine handles embedded program/erase timing, eliminating external clocks during 12 µs byte/word programming and 300 ms sector erase cycles.
It integrates hardware data protection (VCC sense, 10 ms power-on delay), RDY/BUSY open-drain status signaling, Data Polling (I/O7) and Toggle Bit (I/O6) detection, and configurable status register behavior (00/01 mode) to support flexible system-level polling or interrupt-driven operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (524,288 × 16 or 1,048,576 × 8) - supports both word and byte addressing modes |
| Access Time | 70 ns - defines maximum read latency under worst-case VCC and temperature conditions |
| Supply Voltage | 2.65 V to 3.6 V - single supply enables direct integration with 3.3 V logic without level shifting |
| Program Time | 12 µs per byte/word - determines minimum write cycle duration for firmware updates |
| Erase Time | 300 ms per sector - sets timeout budget for background erase in real-time systems |
| Erase Endurance | 100,000 cycles - specifies guaranteed reprogrammability of each sector before wear-out |
| Standby Current | 13 µA - enables ultra-low-power retention in battery-backed or energy-harvesting applications |
Pinout & Package
AT49BV802A-70TU is packaged in a 48-lead TSOP Type I (Thin Small Outline Package) with 0.5 mm pitch, compliant with JEDEC MO-141. Pin 1 is marked by a notch or dot; pin numbering proceeds counterclockwise.
| 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 |
| I/O0–I/O14 | Data I/O (bidirectional) | Primary data path; I/O15 functions as A−1 (LSB address) in byte mode |
| I/O15 / A−1 | Mode-Dependent Terminal | In word mode: data bit 15; in byte mode: LSB address input for x8 configuration |
| BYTE | Configuration Input | 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 Inputs | Chip Enable, Output Enable, Write Enable - dual-line control prevents bus contention during read/write |
| RDY/BUSY | Open-Drain Status Output | Pulled low during internal program/erase; allows wired-OR connection of multiple devices |
| RESET | Asynchronous Initialization | Halts ongoing operation and forces high-impedance outputs; required to exit suspend or error states |
| NC | No Connect | Two pins (TSOP pins 9,10 and CBGA balls D1,E1) are unconnected and must be left floating |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Architecture | 23 independently erasable sectors (15 × 64 KB + 8 × 8 KB) enable granular firmware partitioning and field update safety |
| Erase/Program Suspend | Allows interruption of erase or program to read/program other sectors - critical for real-time OS boot loaders |
| Common Flash Interface (CFI) | Standardized query table at fixed addresses enables automatic driver generation and multi-vendor flash abstraction |
| 128-bit Protection Register | Factory-programmed Block A + user-programmable Block B (lockable) secures boot code against unauthorized modification |
| Sector Lockdown | Per-sector write-protection activated via six-cycle command - preserves bootloader integrity during application updates |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
Use Scenario: Storing firmware and configuration parameters in programmable logic controllers operating in harsh industrial environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast 70 ns read access for deterministic instruction fetch and sector-locked bootloader execution. Use Value: Sector lockdown prevents accidental overwrite of safety-critical startup routines; 100,000 erase cycles ensure >10-year field life under periodic firmware updates. | Use Scenario: Securing boot firmware and calibration data in FDA-regulated diagnostic equipment requiring traceable, tamper-resistant memory. IC Role / Device Role / Timing Role: Trusted boot storage with 128-bit protection register (Block A factory-unique, Block B user-lockable) and CFI for certified driver compatibility. Use Value: Hardware-enforced write protection eliminates software-only vulnerabilities; RDY/BUSY signaling enables deterministic watchdog timeout handling during firmware validation. |
| Automotive Infotainment System Updates | Networking Equipment Configuration Storage |
Use Scenario: Hosting updatable application binaries and UI assets in vehicle head units where over-the-air (OTA) updates require concurrent read/program capability. IC Role / Device Role / Timing Role: Dual-mode (x8/x16) Flash memory supporting OTA patching while maintaining live UI rendering from non-suspended sectors. Use Value: Erase suspend/resume allows background sector erase during active display operation - avoids UI freezes during firmware upgrades. | Use Scenario: Storing switch/router configuration tables, MAC address pools, and security certificates in enterprise-grade networking hardware with strict uptime requirements. IC Role / Device Role / Timing Role: High-reliability configuration store with Data Polling (I/O7) and Toggle Bit (I/O6) status feedback for robust NVRAM management in Linux-based BSPs. Use Value: 13 µA standby current minimizes power draw in always-on management controllers; CFI support simplifies cross-platform driver porting across ASIC families. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF800A-70-4C-NHE | Same density (8 Mbit), 70 ns access, but uses different command set and lacks CFI support; operates at 3.0–3.6 V only | No suspend/resume; no 128-bit protection register; requires custom driver adaptation | Choose when legacy SST39VF compatibility is required and CFI/suspend features are unused |
| MX29LV800CTTI-70G | 8 Mbit, 70 ns, 2.7–3.6 V; includes CFI and sector protection but no erase suspend; different sector map (16 × 4 KB + 1 × 64 KB) | Lacks program suspend capability; no BYTE pin for x8/x16 mode switching; incompatible sector lock command | Select for cost-sensitive designs where suspend functionality is unnecessary and existing MX29LV drivers exist |
Compared with SST39VF800A-70-4C-NHE and MX29LV800CTTI-70G, the AT49BV802A-70TU uniquely combines CFI compliance, full erase/program suspend, byte/word mode flexibility, and hardware-secured sector lockdown - making it optimal for safety-critical or real-time embedded systems requiring field-upgradable trusted boot.
Availability
AT49BV802A-70TU is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics, automotive infotainment, and networking equipment requiring stable component supply, long-term lifecycle support, and guaranteed Flash endurance.
Supply support for AT49BV802A-70TU 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 microcontrollers, analog, Flash memory, and security ICs for industrial, automotive, and communications markets.
The AT49BV802A-70TU belongs to Atmel's legacy parallel-interface Flash memory product line, designed specifically for embedded systems requiring reliable, in-system programmable nonvolatile storage with hardware-based security and real-time operational flexibility.
FAQ
What is the operating voltage range for the AT49BV802A-70TU?
The AT49BV802A-70TU operates from 2.65 V to 3.6 V DC. This single-supply range allows direct interfacing with 3.3 V logic families without level shifters. Operation below 2.65 V disables programming functions via built-in VCC sense circuitry, preventing inadvertent writes during brownout conditions. The AT49BV802A-70TU maintains full read functionality and valid timing specifications across this entire voltage window.
How does the BYTE pin affect the AT49BV802A-70TU's data interface?
The BYTE pin configures the AT49BV802A-70TU between x8 and x16 data bus modes. When pulled high, the device operates in 16-bit word mode with I/O0–I/O15 active; when pulled low, it switches to 8-bit byte mode with only I/O0–I/O7 active and I/O15 repurposed as address bit A−1. This pin must be held static during operation - changing it mid-access causes undefined behavior. The AT49BV802A-70TU's internal logic automatically adapts address decoding and I/O buffering based on BYTE state.
Does the AT49BV802A-70TU support simultaneous read and program operations?
Yes, the AT49BV802A-70TU supports concurrent operations via its Erase Suspend and Program Suspend features. While erasing one sector, the host can read from or program any other non-suspending sector. Similarly, during byte/word programming, the host may read from any sector outside the programming sector. These capabilities are enabled by dedicated suspend/resume commands (B0h/30h) and require no external hardware - the AT49BV802A-70TU manages internal state transitions autonomously within 15–20 µs.
What security mechanisms does the AT49BV802A-70TU provide for boot code protection?
The AT49BV802A-70TU provides three layered security features: (1) Sector Lockdown - per-sector write-protection activated via six-cycle command to prevent bootloader corruption; (2) 128-bit Protection Register - factory-programmed unique ID (Block A) plus user-programmable lockable block (Block B) for cryptographic keys; (3) Hardware Data Protection - VCC sensing and 10 ms power-on delay inhibit writes during unstable supply. All three mechanisms operate independently and are enforced at the silicon level - the AT49BV802A-70TU will not execute program/erase commands targeting locked sectors or registers.
How is end-of-erase or end-of-program detected on the AT49BV802A-70TU?
The AT49BV802A-70TU offers three independent status reporting methods: (1) RDY/BUSY pin - open-drain output pulled low during internal operations; (2) Data Polling - I/O7 returns complement of written data during programming, then true data upon completion; (3) Toggle Bit - I/O6 toggles between 0/1 during operation and stabilizes when complete. All methods work with either configuration register setting (00 or 01). The AT49BV802A-70TU also provides I/O5 as an error flag that goes high if erase/program exceeds internal pulse limits or targets a protected sector.
AT49BV802A-70TU 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:
- 8Mbit
- Memory Organization:
- 1M x 8, 512K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 200µs
- 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
AT49BV802A-70TU FAQ
1.How can I place an order for AT49BV802A-70TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV802A-70TU 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 AT49BV802A-70TU reliable?
The price and inventory of AT49BV802A-70TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV802A-70TU is usually 5 days.
3.What payment methods are accepted for AT49BV802A-70TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV802A-70TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV802A-70TU?
AT49BV802A-70TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV802A-70TU 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 AT49BV802A-70TU?
For technical support, including AT49BV802A-70TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV802A-70TU requirements.
6.How does Aetrix verify that AT49BV802A-70TU is sourced from the original manufacturer or authorized distributors?
All AT49BV802A-70TU 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 AT49BV802A-70TU meets industry standards.
7.What is the process for return or replacement of AT49BV802A-70TU?
All AT49BV802A-70TU units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV802A-70TU, 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 AT49BV802A-70TU part is unused and in its original packaging.
Return procedure for AT49BV802A-70TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV802A-70TU Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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