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Microchip Technology AT49BV162A-70TU
- Part No.:
- AT49BV162A-70TU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV162A-70TU.pdf
- Description:
- IC FLASH 16MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,217
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Product details
Overview
AT49BV162A-70TU from Microchip Technology (formerly Atmel) is a 16-Mbit (1M × 16 / 2M × 8) single-supply 2.7V Flash memory IC with sector erase architecture, 55 ns read access time, and dual-mode byte/word data interface. It supports in-system programming via CE/OE/WE control, features Erase/Program Suspend for concurrent read/program operations, and targets embedded boot code storage and firmware update applications.
For engineers reviewing the AT49BV162A-70TU datasheet, AT49BV162A-70TU pinout, AT49BV162A-70TU application, or AT49BV162A-70TU equivalent, key selection considerations include its 48-pin TSOP package, VPP-based hardware write protection, Common Flash Interface (CFI) support for auto-configuration, and sector lockdown capability for secure boot code retention.
Technical Context
The AT49BV162A-70TU implements a command-register-based Flash architecture with 39 independently erasable sectors (31 × 64 KB + 8 × 8 KB), supporting both chip-erase and sector-erase via six-byte software commands. Its internal state machine handles timing-critical program/erase pulses without external clocks.
It provides three end-of-operation detection methods: READY/BUSY pin (open-drain), Data Polling on I/O7, and Toggle Bit on I/O6 - all configurable via a programmable status register. The BYTE pin selects between x8 (I/O0–I/O7 active, I/O15 as A−1) and x16 (I/O0–I/O15 active) data bus modes, enabling flexible microcontroller interface design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (1,048,576 words × 16 bits or 2,097,152 bytes × 8 bits) |
| Read Access Time | 55 ns - enables direct execution from flash in high-speed 8/16-bit microcontroller systems |
| Supply Voltage | 2.65V to 3.6V - single-supply operation compatible with 3.3V logic domains |
| Program Time | 12 µs per word - reduces firmware update latency during field upgrades |
| Erase Time | 300 ms per sector - predictable sector-level erase for partial firmware patching |
| Erase Cycles | ≥100,000 - supports long-life industrial firmware update cycles |
| Operating Temp | −40°C to +85°C - qualified for extended industrial temperature range |
| Package | 48-lead TSOP Type I (12mm × 20mm) - surface-mount compatible with standard PCB assembly |
Pinout & Package
AT49BV162A-70TU is housed in a 48-lead Thin Small Outline Package (TSOP Type I), pin-compatible with JEDEC MO-141AC. Pin functions are electrically defined and validated per Atmel datasheet 3349H.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A19 | Address Inputs | 20-bit address bus supporting full 1M-word addressing; A−1 function on I/O15 in byte mode |
| I/O0–I/O14 | Data I/O (x16) / I/O0–I/O7 + A−1 (x8) | In word mode: bidirectional 16-bit data path; in byte mode: 8-bit data + LSB address extension |
| I/O15 | Data I/O (x16) or A−1 Input (x8) | Configurable terminal - enables seamless transition between 8-bit and 16-bit host interfaces |
| CE, OE, WE | Chip/Output/Write Enable | Dual-line (CE+OE) read control prevents bus contention; WE controls write latching and command entry |
| 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) |
| VPP | Write Protection Voltage | Must be ≥0.9V for program/erase; <0.4V disables all writes - hardware lock against accidental corruption |
| RDY/BUSY | Open-Drain Status Output | Active-low during internal operations; supports wired-OR of multiple devices on shared status line |
| RESET | Hardware Initialization | Pulsing low ≥500 ns forces return to read/standby mode - critical for recovery after failed operations |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Architecture | 39 sectors (31 × 64 KB + 8 × 8 KB) with individual write lockout - enables granular firmware updates without full chip erase |
| Erase/Program Suspend | Allows reading from or programming non-suspending sectors while erase/program runs elsewhere - essential for real-time system responsiveness |
| 128-bit Protection Register | Factory-programmed Block A + user-programmable Block B (lockable) - supports secure boot authentication and device identity binding |
| Common Flash Interface (CFI) | Standardized query table at fixed addresses - enables OS/bootloader auto-detection of geometry, timing, and command sets |
| Sector Lockdown | Per-sector software lock preventing erase/program after activation - preserves immutable boot loader in designated sectors |
| Hardware Data Protection | VCC sense, power-on delays, and VPP threshold enforcement - prevents corruption during brown-out or unstable supply conditions |
Applications
| Embedded Boot Memory | Firmware Update Storage |
|---|---|
Use Scenario: Storing primary bootloader and initialization code for ARM Cortex-M or RISC-V microcontrollers during cold start. IC Role / Device Role / Timing Role: Non-volatile boot code repository accessed via parallel x8/x16 bus; executes directly (XIP) or copies to RAM. Use Value: Sector lockdown ensures boot code integrity across 100,000+ field updates; 55 ns access enables deterministic startup timing. | Use Scenario: Holding field-upgradable application firmware images in industrial PLCs or medical devices. IC Role / Device Role / Timing Role: Field-programmable storage partitioned into protected boot and updatable application sectors. Use Value: Erase suspend allows background download while maintaining real-time control execution from unlocked sectors. |
| Secure Identity Module | Legacy System Replacement |
Use Scenario: Providing tamper-resistant device identity and cryptographic key storage in IoT edge nodes. IC Role / Device Role / Timing Role: Secure storage element using 128-bit protection register (Block A factory-unique, Block B user-lockable). Use Value: Prevents cloning or unauthorized firmware replacement; lockable Block B enforces one-time provisioning of keys. | Use Scenario: Direct drop-in replacement for obsolete 28Fxxx or AM29xxx Flash in legacy telecom or test equipment. IC Role / Device Role / Timing Role: Pin- and command-compatible parallel Flash memory with identical TSOP-48 footprint and CFI support. Use Value: Eliminates PCB redesign; CFI compatibility ensures existing BIOS/bootloader drivers require no modification. |
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 (16 Mbit), 70 ns access, 3.0–3.6V supply; lacks VPP pin and sector lockdown | No hardware write protection or secure sector locking - unsuitable for boot code requiring tamper resistance | Select when cost sensitivity outweighs security requirements and CFI is not needed |
| MX29LV160DBTI-70G | 16 Mbit, 70 ns, 2.7–3.6V; includes CFI and boot-block configuration but no VPP pin or 128-bit protection register | Supports top/bottom boot blocks but lacks per-sector lockdown and factory-unique ID - weaker secure boot capability | Prefer for general-purpose firmware storage where boot block flexibility matters more than cryptographic identity |
Compared with SST39VF1601C-70-4C-EKE and MX29LV160DBTI-70G, the AT49BV162A-70TU uniquely combines VPP-based hardware write protection, per-sector lockdown, and a factory-programmed 128-bit ID - making it the only option among the three qualified for secure boot implementations requiring both physical and logical write inhibition.
Availability
AT49BV162A-70TU is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, and telecommunications infrastructure requiring stable component supply, long-lifecycle support, and verified Flash memory performance.
Supply support for AT49BV162A-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 supply chain responsibility for legacy Atmel Flash products including the AT49BV162A-70TU.
This device belongs to Atmel's parallel-interface Flash memory product line, designed specifically for embedded systems requiring reliable, in-system programmable non-volatile storage with robust data protection and secure boot capabilities.
FAQ
What is the operating voltage range for the AT49BV162A-70TU?
The AT49BV162A-70TU operates from 2.65V to 3.6V DC. It is a single-supply 3V-only Flash memory - no 5V tolerance on VCC. Operation below 2.65V may result in undefined behavior or failure to execute commands; above 3.6V risks permanent damage. The VPP pin requires ≥0.9V for program/erase but must never exceed VCC.
Does the AT49BV162A-70TU support both 8-bit and 16-bit data bus configurations?
Yes, the AT49BV162A-70TU supports both configurations via the BYTE pin. When BYTE = HIGH, it operates in 16-bit mode with I/O0–I/O15 active. When BYTE = LOW, it operates in 8-bit mode with I/O0–I/O7 active and I/O15 repurposed as address bit A−1. This dual-mode capability allows direct interfacing with either 8-bit or 16-bit microcontrollers without external glue logic.
How does sector lockdown work on the AT49BV162A-70TU?
Sector lockdown on the AT49BV162A-70TU is enabled per sector using a six-bus-cycle command. Once activated, the locked sector becomes read-only: erase and program operations are blocked until the next power cycle or RESET pulse. Lockdown status is detectable via software read at address 00002H within the sector. This feature ensures boot code integrity by preventing accidental or malicious overwrites during firmware updates.
What methods are available to detect completion of program or erase operations on the AT49BV162A-70TU?
The AT49BV162A-70TU provides three independent detection methods: (1) RDY/BUSY pin (active-low open-drain output), (2) Data Polling on I/O7 (complement-to-data then true data), and (3) Toggle Bit on I/O6 (toggling until operation completes). All methods are usable simultaneously and supported regardless of the status register configuration (00 or 01). The RDY/BUSY pin supports wired-OR for multi-device systems.
Is the AT49BV162A-70TU pin-compatible with other Flash memories in the same family?
Yes, the AT49BV162A-70TU shares identical pinout, package (48-lead TSOP), and command set with AT49BV162AT, AT49BV163A, and AT49BV163AT. Key differences include VPP presence (absent on AT49BV163x variants) and boot-block configuration (top vs. bottom). This enables direct substitution within the same PCB layout when functional requirements align - e.g., replacing AT49BV162A-70TU with AT49BV162AT for extended temperature grade.
AT49BV162A-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
AT49BV162A-70TU FAQ
1.How can I place an order for AT49BV162A-70TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV162A-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 AT49BV162A-70TU reliable?
The price and inventory of AT49BV162A-70TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV162A-70TU is usually 5 days.
3.What payment methods are accepted for AT49BV162A-70TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV162A-70TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV162A-70TU?
AT49BV162A-70TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV162A-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 AT49BV162A-70TU?
For technical support, including AT49BV162A-70TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV162A-70TU requirements.
6.How does Aetrix verify that AT49BV162A-70TU is sourced from the original manufacturer or authorized distributors?
All AT49BV162A-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 AT49BV162A-70TU meets industry standards.
7.What is the process for return or replacement of AT49BV162A-70TU?
All AT49BV162A-70TU units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV162A-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 AT49BV162A-70TU part is unused and in its original packaging.
Return procedure for AT49BV162A-70TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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