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Microchip Technology AT49BV163AT-70TU
- Part No.:
- AT49BV163AT-70TU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV163AT-70TU.pdf
- Description:
- IC FLASH 16MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,161
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Product details
Overview
AT49BV163AT-70TU from Microchip Technology (formerly Atmel) is a 16-Mbit (1M × 16 / 2M × 8) single-supply 3V-only Flash memory IC used for nonvolatile code and data storage in embedded systems. It supports x16/x8 configurable data bus, sector erase architecture with 39 sectors (31 × 64KB + 8 × 8KB), and operates across 2.65V–3.6V supply. Its 55 ns read access time, 12 µs word program time, and suspend/resume capability make it suitable for in-system reprogrammable boot memory in industrial controllers and communication modules.
For engineers reviewing the AT49BV163AT-70TU datasheet, AT49BV163AT-70TU pinout, AT49BV163AT-70TU application, or AT49BV163AT-70TU equivalent, key selection considerations include sector lockdown support, CFI compliance, RDY/BUSY signaling, VPP-independent operation (VPP pin omitted), and TSOP-48 package compatibility with legacy 3V Flash designs.
Technical Context
The AT49BV163AT-70TU implements a command-driven Flash architecture with dual-mode addressing (BYTE pin selects x8/x16), CE/OE/WE control logic to prevent bus contention, and internal state machine for erase/program execution. It uses Data Polling (I/O7), Toggle Bit (I/O6), and open-drain RDY/BUSY to signal operation completion without external clocks.
Unlike the AT49BV162A(T), the AT49BV163AT-70TU omits the VPP pin-write protection relies solely on software-based sector lockdown and hardware inhibit conditions (CE high, OE low, WE high). Its CFI Query mode (entry via 98h at address 55h) enables runtime detection of timing parameters, sector map, and device identity for portable firmware drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (1,048,576 × 16-bit or 2,097,152 × 8-bit) |
| Read Access Time | 55 ns - determines minimum instruction fetch cycle in microcontroller boot loaders |
| Word Program Time | 12 µs - enables fast field firmware updates without long blocking delays |
| Sector Erase Time | 300 ms - defines worst-case latency when updating configuration blocks |
| End-of-Operation Detection | RDY/BUSY (open-drain), Data Polling (I/O7), Toggle Bit (I/O6) - provides flexible polling options for interrupt-driven or polling-based host firmware |
| Erase Endurance | 100,000 cycles - qualifies for long-life industrial logging or parameter storage applications |
| Supply Voltage Range | 2.65V to 3.6V - compatible with 3.3V system rails without level-shifting |
| Common Flash Interface | CFI-compliant - allows generic flash driver reuse across multiple vendors and densities |
Pinout & Package
AT49BV163AT-70TU is available in a 48-lead TSOP Type I (12mm × 20mm) package. Pinout differs from AT49BV162A(T) by replacing VPP with NC (No Connect), as confirmed in datasheet section 2.3 and pin function table footnote 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A19 | Address Inputs | 20-bit address bus supporting full 1M-word addressing; A-1 alias on I/O15 in byte mode |
| I/O0–I/O14 | Data I/O (x16) | Bi-directional data bus; I/O8–I/O14 tri-stated in byte mode |
| I/O15 / A-1 | Data I/O (x16) or LSB Address (x8) | Configurable: word mode = data bit 15; byte mode = address bit −1 for 8-bit alignment |
| BYTE | Bus Width Select | Logic high = x16 mode (I/O0–I/O15 active); logic low = x8 mode (I/O0–I/O7 active) |
| CE, OE, WE | Chip/Output/Write Enable | Three independent controls prevent bus contention; required low for read/write access |
| RESET | Hardware Initialization | Pulsing low ≥500 ns forces return to read/standby mode and clears pending operations |
| RDY/BUSY | Open-Drain Status Output | Active-low during erase/program; supports wired-OR of multiple devices on shared status line |
| NC | No Connect | VPP position replaced with NC - no external voltage required for write/erase |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Architecture | 39 independently erasable sectors (31 × 64KB + 8 × 8KB) enables granular firmware partitioning and secure boot block isolation |
| Erase/Program Suspend | Allows reading from or programming non-suspending sectors while erase/program runs elsewhere - critical for real-time OS firmware updates |
| Sector Lockdown | Software-enabled per-sector write protection prevents accidental overwrite of bootloader or calibration data after power-up |
| 128-bit Protection Register | Factory-programmed Block A + user-programmable (and lockable) Block B enables secure device identification and anti-cloning measures |
| CFI Compliance | Standardized query interface allows automatic driver configuration without hard-coded timing or geometry assumptions |
| Green Packaging | Pb/Halide-free TSOP-48 meets RoHS Directive 2011/65/EU for environmentally compliant manufacturing |
Applications
| Industrial PLC Firmware Storage | Telecom Line Card Boot Memory |
|---|---|
Use Scenario: Storing firmware images and configuration tables in programmable logic controllers deployed in factory automation environments with ambient temperatures up to 85°C. IC Role / Device Role / Timing Role: Nonvolatile boot memory mapped into CPU address space; provides deterministic 55 ns read access for fast startup and real-time task loading. Use Value: Sector lockdown protects bootloader integrity; 100,000 erase cycles ensure >10-year field life under periodic firmware upgrades. | Use Scenario: Holding boot code and protocol stack binaries in carrier-grade DSLAM and optical line terminal line cards requiring hot-swap capability and field-upgradable firmware. IC Role / Device Role / Timing Role: x16-configured Flash memory interfaced to 16-bit microcontroller bus; RDY/BUSY pin synchronizes firmware update routines without CPU polling overhead. Use Value: Erase suspend allows background firmware validation while maintaining real-time packet processing - zero service interruption during updates. |
| Medical Diagnostic Equipment Parameter Storage | Automotive Body Control Module Code Storage |
Use Scenario: Retaining calibration coefficients, sensor compensation tables, and regulatory audit logs in portable ultrasound and ECG devices subject to IEC 62304 software lifecycle requirements. IC Role / Device Role / Timing Role: x8-configured Flash accessed via BYTE=low; 12 µs word program time enables rapid recalibration writes during device self-test sequences. Use Value: 128-bit protection register stores unique device identifiers for traceability; CFI support simplifies FDA-mandated firmware version verification scripts. | Use Scenario: Hosting application firmware and EEPROM-emulated NV storage in 12V automotive body control units operating across −40°C to +105°C junction temperature range. IC Role / Device Role / Timing Role: Standalone 3V Flash memory decoupled from main MCU power domain; 13 µA standby current minimizes battery drain during vehicle sleep mode. Use Value: Hardware data protection (VCC sense, power-on delay) prevents corruption during cold-cranking voltage dips; TSOP-48 footprint ensures mechanical compatibility with legacy automotive PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF1601C-70-4C-EKE | Same density (16Mbit), 70 ns access, TSOP-48, but requires VPP = 12V for program/erase; lacks CFI and suspend/resume | Not suitable for VPP-free designs; no sector suspend capability limits real-time update flexibility | Select only if legacy VPP infrastructure exists and suspend features are unnecessary |
| MX29LV160DBTI-70G | 16Mbit, 70 ns, TSOP-48, VPP-free, CFI-compliant, but only supports top-boot configuration (no bottom-boot option) | Boot block location fixed; incompatible where bottom-boot layout is required for existing PCBs | Prefer when boot vector alignment matches top-boot requirement and CFI + suspend are needed |
Compared with SST39VF1601C-70-4C-EKE and MX29LV160DBTI-70G, the AT49BV163AT-70TU uniquely combines VPP-free operation, bottom/top boot configurability, full suspend/resume, and sector lockdown - making it the only choice for secure, real-time upgradable 3V Flash in constrained legacy footprints.
Availability
AT49BV163AT-70TU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, telecom line card boot memory, medical diagnostic equipment parameter storage, and automotive body control module code storage requiring stable component supply across extended product lifecycles.
Supply support for AT49BV163AT-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 support for legacy Atmel Flash products including the AT49BV163AT-70TU.
The AT49BV163AT-70TU belongs to Atmel's 3V Flash memory family, designed specifically for reliable, in-system programmable nonvolatile storage in resource-constrained embedded systems where power efficiency, data security, and long-term endurance are critical.
FAQ
Does the AT49BV163AT-70TU require an external VPP voltage for programming or erasing?
No, the AT49BV163AT-70TU does not require VPP - the VPP pin is omitted (replaced with NC) per datasheet section 2.3 and pin function table footnote 1. All program and erase operations execute using only the 2.65V–3.6V VCC supply. Write protection is enforced via sector lockdown commands and hardware inhibit conditions (CE high, OE low, WE high), eliminating need for external high-voltage circuitry. This simplifies board design and improves reliability in 3V-only systems.
What is the difference between AT49BV163AT-70TU and AT49BV162AT-70TU?
The AT49BV163AT-70TU omits the VPP pin (replaced with NC), while the AT49BV162AT-70TU retains it for optional write-protection voltage input. Both share identical density (16 Mbit), timing (55 ns read, 12 µs program), sector architecture (39 sectors), and feature set (suspend/resume, CFI, lockdown). The AT49BV163AT-70TU is intended for VPP-free designs; the AT49BV162AT-70TU supports designs where VPP-based hardware write lock is preferred. Pin compatibility is maintained except at the VPP/NC location.
Can the AT49BV163AT-70TU be used in byte-mode (x8) and word-mode (x16) configurations?
Yes, the AT49BV163AT-70TU supports both configurations via the BYTE pin: logic high enables x16 mode (I/O0–I/O15 active), logic low enables x8 mode (I/O0–I/O7 active, I/O8–I/O14 tri-stated, I/O15 repurposed as A-1 address input). This flexibility allows direct interface to 8-bit or 16-bit microcontrollers without external glue logic. Address mapping remains consistent - A0–A19 cover full 1M-word space in x16 mode, while x8 mode uses A-1 (via I/O15) for LSB alignment in 2M-byte addressing.
How does sector lockdown work on the AT49BV163AT-70TU, and can locked sectors be unlocked?
Sector lockdown is enabled per sector using the six-bus-cycle Sector Lockdown command (SA + 60h). Once locked, a sector becomes permanently read-only until the next power-up or RESET pulse - no software unlock command exists. At power-on or reset, all sectors default to unlocked. Lockdown status is verified by reading address 00002H within a sector: I/O0 = high indicates lockdown active. This mechanism protects bootloader or calibration data from accidental overwrite while allowing field updates to unprotected sectors - a key requirement for certified medical and industrial firmware.
Is the AT49BV163AT-70TU still recommended for new designs?
No - the official Atmel/Microchip documentation (datasheet 3349H–FLASH–3/05, page 1) explicitly states "Not Recommended for New Design" and advises contacting Microchip to discuss modern alternatives. However, the AT49BV163AT-70TU remains fully supported for legacy design refresh, repair, and long-lifecycle industrial programs. Aetrix Electronics maintains active inventory and provides full technical documentation, replacement guidance, and lifecycle coordination for customers sustaining existing AT49BV163AT-70TU-based systems.
AT49BV163AT-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:
- 16Mbit
- Memory Organization:
- 2M x 8, 1M 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
AT49BV163AT-70TU FAQ
1.How can I place an order for AT49BV163AT-70TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV163AT-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 AT49BV163AT-70TU reliable?
The price and inventory of AT49BV163AT-70TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV163AT-70TU is usually 5 days.
3.What payment methods are accepted for AT49BV163AT-70TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV163AT-70TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV163AT-70TU?
AT49BV163AT-70TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV163AT-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 AT49BV163AT-70TU?
For technical support, including AT49BV163AT-70TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV163AT-70TU requirements.
6.How does Aetrix verify that AT49BV163AT-70TU is sourced from the original manufacturer or authorized distributors?
All AT49BV163AT-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 AT49BV163AT-70TU meets industry standards.
7.What is the process for return or replacement of AT49BV163AT-70TU?
All AT49BV163AT-70TU units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV163AT-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 AT49BV163AT-70TU part is unused and in its original packaging.
Return procedure for AT49BV163AT-70TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV163AT-70TU Tags
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