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Microchip Technology AT49BV161T-70TI
- Part No.:
- AT49BV161T-70TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV161T-70TI.pdf
- Description:
- IC FLASH 16MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49BV161T-70TI from Microchip Technology (formerly Atmel) is a 16-Mbit (1M × 16 / 2M × 8) single-supply 3.0V Flash memory IC with sector erase architecture, 70 ns access time, and dual-mode byte/word operation controlled by the BYTE pin. It supports in-system programming in embedded microcontroller boot applications requiring nonvolatile code storage with hardware write protection and sector lockdown.
For engineers reviewing the AT49BV161T-70TI datasheet, AT49BV161T-70TI pinout, AT49BV161T-70TI application, or AT49BV161T-70TI equivalent, key selection considerations include TSOP/CBGA package compatibility, RDY/BUSY open-drain signaling, VPP-assisted accelerated erase/program, suspend/resume capability for real-time firmware updates, and 128-bit protection register support for secure boot code integrity.
Technical Context
The AT49BV161T-70TI implements a command-register-based Flash architecture with internal state machine control for erase, program, and suspend operations. It features two distinct operating modes-byte (I/O0–I/O7 active, I/O15 = A−1) and word (I/O0–I/O15 active)-selected via the BYTE pin, enabling flexible interface integration with 8-bit or 16-bit microcontrollers.
Its 39-sector organization includes thirty-one 64KB (32K-word) sectors and eight 8KB (4K-word) sectors, each individually lockable. Erase and program operations are verified using Data Polling (I/O7), Toggle Bit (I/O6), and dedicated status bits (I/O5, I/O3), with RDY/BUSY output provided exclusively on the AT49BV161T variant for hardware timing synchronization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (1,048,576 × 16 or 2,097,152 × 8), enabling full boot loader + application firmware storage in compact footprint |
| Access Time | 70 ns maximum - meets timing requirements for 14 MHz bus interfaces without wait states |
| Supply Voltage | 2.65V to 3.3V (BV version) - compatible with 3.3V logic systems and low-power embedded designs |
| Program Time | 20 µs per word - enables rapid field firmware patching during maintenance windows |
| Erase Time | 300 ms per sector - allows selective update of application partitions without full chip reflash |
| Standby Current | 10 µA - supports battery-backed retention in always-on IoT edge nodes |
| Sector Architecture | 39 sectors (31 × 64KB + 8 × 8KB) - permits granular protection of boot code (SA0–SA1) while updating user application sectors |
Pinout & Package
AT49BV161T-70TI is available in 48-lead TSOP Type I and 45-ball/48-ball CBGA packages. Pin functions are identical across both packages; ball/lead numbering differs per mechanical layout but electrical mapping is consistent.
| 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/O15 | Data I/O (x16) / I/O0–I/O7 + A−1 (x8) | Configurable 16-bit or 8-bit data path; BYTE pin selects mode - critical for MCU bus width matching |
| CE, OE, WE | Chip Enable, Output Enable, Write Enable | Three-control-line interface prevents bus contention; supports standard microprocessor timing |
| RDY/BUSY | Open-drain Ready/Busy Output | Hardware handshake signal - enables interrupt-driven erase/program completion detection (AT49BV161T-specific) |
| VPP | Write Protection & Acceleration Supply | Enables 5V/12V-accelerated programming/erase; <0.8V disables writes - essential for robust in-field update security |
| RESET | Device Initialization Input | Halts ongoing operations and forces high-impedance outputs - required for safe power-cycle recovery and lockdown reset |
| BYTE | Mode Selection Input | Logic-high = x16 word mode; logic-low = x8 byte mode with I/O15 repurposed as LSB address (A−1) |
Key Features
| Feature | Design Value |
|---|---|
| Suspend/Resume for Erase & Program | Allows concurrent read from one sector while erasing/programming another - enables real-time firmware updates without system freeze |
| Sector Lockdown | Per-sector write-protection activated via command sequence - preserves boot ROM integrity during field upgrades of application code |
| 128-bit Protection Register | Factory-programmed Block A + user-programmable Block B (lockable) - supports cryptographic key binding and anti-cloning in secure boot chains |
| VPP-Controlled Write Acceleration | 5V or 12V on VPP reduces program/erase times vs. VCC-only operation - optimizes production programming throughput and field update latency |
| Hardware Data Protection | VCC sense, noise filtering (<15 ns), and control-line inhibit logic prevent spurious writes - critical for automotive and industrial ECU reliability |
Applications
| Industrial PLC Firmware Storage | Automotive ECU Boot Memory |
|---|---|
|
Use Scenario: Storing bootloader and safety-critical firmware in programmable logic controllers subject to frequent field updates and EMC stress. IC Role / Device Role / Timing Role: Nonvolatile code storage with sector lockdown protecting startup routines and RDY/BUSY signaling for deterministic update sequencing. Use Value: Prevents corruption during brown-out events via VCC-sense protection and enables partial reflash of application modules without rebooting the entire control system. |
Use Scenario: Holding ASIL-B compliant boot code in engine control units where tamper resistance and secure firmware validation are mandated. IC Role / Device Role / Timing Role: Secure boot memory with 128-bit protection register for key binding and hardware-accelerated erase/program under diagnostic mode. Use Value: Enables certified secure boot chain via factory-block A uniqueness and user-lockable block B for OEM-specific keys - meeting ISO 21434 requirements. |
| Medical Device Configuration Storage | Networking Equipment Boot Image |
|
Use Scenario: Retaining calibrated sensor parameters and regulatory-compliant configuration profiles in portable diagnostic equipment with battery backup. IC Role / Device Role / Timing Role: Low-power (10 µA standby) nonvolatile storage with byte-mode interface for 8-bit microcontroller host and sector-level write lock. Use Value: Guarantees parameter persistence over 10+ year shelf life while allowing clinical staff to update calibration tables without risking boot image corruption. |
Use Scenario: Hosting primary and fallback boot images in enterprise switches/routers requiring zero-downtime firmware upgrades. IC Role / Device Role / Timing Role: Dual-image storage with suspend/resume capability - reads active image while erasing/programming standby partition. Use Value: Achieves sub-second failover during upgrade cycles by decoupling read and write operations across protected sectors - eliminating service interruption. |
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 | 48-pin TSOP, 70 ns access, 16 Mbit x16, no RDY/BUSY pin, no VPP acceleration, no 128-bit protection register | Lacks hardware suspend/resume and secure boot features; suitable only for basic code storage without field update or security needs | Select when cost sensitivity outweighs need for secure boot, accelerated programming, or real-time suspend capability |
| MX29LV160ETTI-70G | 48-pin TSOP, 70 ns access, 16 Mbit x16/x8, includes RDY/BUSY, no VPP pin, no 128-bit protection register, different command set | Supports suspend/resume and RDY/BUSY but lacks VPP-controlled acceleration and factory-unique security block | Choose for RDY/BUSY-driven timing and suspend/resume where VPP acceleration and cryptographic binding are not required |
Compared with SST39VF1601C-70-4C-EKE and MX29LV160ETTI-70G, the AT49BV161T-70TI uniquely combines RDY/BUSY signaling, VPP-accelerated erase/program, per-sector lockdown, and factory-programmed 128-bit security - making it the only option among the three qualified for certified secure boot implementations with real-time firmware update resilience.
Availability
AT49BV161T-70TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive ECU boot memory, medical device configuration storage, and networking equipment boot image applications requiring stable component supply, long-lifecycle support, and guaranteed traceability.
Supply support for AT49BV161T-70TI 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 ownership of the AT49BV/LV16X(T) Flash memory family. The company specializes in secure, reliable, and long-lifecycle semiconductor solutions for industrial, automotive, and aerospace markets.
The AT49BV/LV16X(T) product line was designed specifically for embedded systems requiring robust in-system programmable nonvolatile memory with hardware-enforced security, real-time update flexibility, and extended temperature operation - targeting mission-critical boot and firmware storage.
FAQ
What is the difference between AT49BV161T-70TI and AT49BV160T-70TI?
The AT49BV161T-70TI supports configurable byte/word operation via the BYTE pin, whereas the AT49BV160T-70TI operates exclusively in word mode. Additionally, AT49BV161T-70TI includes the RDY/BUSY open-drain output pin for hardware timing synchronization - a feature absent in the AT49BV160T-70TI. Both share identical density, access time, and sector architecture, but AT49BV161T-70TI offers greater interface flexibility and real-time operation visibility.
Does AT49BV161T-70TI support 5V-tolerant inputs?
Yes, AT49BV161T-70TI supports 5.5V-tolerant address and control inputs (A0–A19, CE, OE, WE, RESET, BYTE) when operating from a 2.65V–3.6V VCC supply - simplifying level-shifting in mixed-voltage systems. However, I/O lines are limited to 0–(VCC + 0.6V), and VPP must be either 0–0.8V (inhibit) or 5.0V ±0.5V / 12.0V ±0.5V (accelerate); 5V tolerance does not apply to I/O or VPP pins.
How is sector lockdown enabled and released on AT49BV161T-70TI?
Sector lockdown on AT49BV161T-70TI is enabled per sector using the six-bus-cycle Sector Lockdown command with the target sector address. Once locked, the sector becomes read-only until the next power-up or RESET assertion - there is no software unlock command. This ensures that protected boot sectors remain immutable during field updates unless explicitly reset, meeting functional safety requirements for locked-down firmware regions.
Can AT49BV161T-70TI be used in byte-mode with an 8-bit microcontroller?
Yes, AT49BV161T-70TI operates in byte mode when the BYTE pin is held low, activating I/O0–I/O7 for data transfer and repurposing I/O15 as the LSB address input (A−1). This matches standard 8-bit MCU bus interfaces without external logic. CE, OE, and WE retain full functionality, and all sector erase, program, and suspend commands remain valid - making AT49BV161T-70TI directly compatible with legacy 8-bit embedded platforms.
What happens if VPP is left unconnected on AT49BV161T-70TI?
VPP must never be left floating on AT49BV161T-70TI. An unconnected VPP pin may float above 0.8V, unintentionally enabling program/erase operations and causing data corruption. Per the datasheet, VPP should be tied to VSS (ground) to disable accelerated operations and enforce VCC-only programming, or actively driven to 5.0V ±0.5V / 12.0V ±0.5V when acceleration is required. Leaving VPP unconnected violates absolute maximum ratings and risks device malfunction.
AT49BV161T-70TI 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 ~ 3.3V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSOP
AT49BV161T-70TI FAQ
1.How can I place an order for AT49BV161T-70TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV161T-70TI 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 AT49BV161T-70TI reliable?
The price and inventory of AT49BV161T-70TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV161T-70TI is usually 5 days.
3.What payment methods are accepted for AT49BV161T-70TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV161T-70TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV161T-70TI?
AT49BV161T-70TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV161T-70TI 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 AT49BV161T-70TI?
For technical support, including AT49BV161T-70TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV161T-70TI requirements.
6.How does Aetrix verify that AT49BV161T-70TI is sourced from the original manufacturer or authorized distributors?
All AT49BV161T-70TI 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 AT49BV161T-70TI meets industry standards.
7.What is the process for return or replacement of AT49BV161T-70TI?
All AT49BV161T-70TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV161T-70TI, 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 AT49BV161T-70TI part is unused and in its original packaging.
Return procedure for AT49BV161T-70TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV161T-70TI Tags
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