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Microchip Technology AT49LV161T-70CI
- Part No.:
- AT49LV161T-70CI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFBGA, CSPBGA
- Datasheet:
-
AT49LV161T-70CI.pdf
- Description:
- IC FLASH 16MBIT PARALLEL 48CBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,566
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Product details
Overview
AT49LV161T-70CI from Microchip Technology (formerly Atmel) is a 16-Mbit (1M × 16 / 2M × 8) 3.0V-only parallel Flash memory with sector erase architecture, 70 ns access time, and dual-mode byte/word operation enabled by the BYTE pin. It supports in-system programming via single 2.65–3.3V supply and is used in embedded boot code storage for industrial controllers and telecom baseband modules.
For engineers reviewing the AT49LV161T-70CI datasheet, AT49LV161T-70CI pinout, AT49LV161T-70CI application, or AT49LV161T-70CI equivalent, key selection criteria include sector lockdown capability, RDY/BUSY open-drain signaling, VPP-accelerated erase/program, suspend/resume functionality, and TSOP/CBGA package compatibility with legacy 48-pin layouts.
Technical Context
The AT49LV161T-70CI implements a command-register-based architecture with six-byte unlock sequences for chip/sector erase and program operations. Its internal write state machine manages autonomous timing for 300 ms sector erase and 20 µs word program cycles without external clocks.
It features dual status reporting: hardware RDY/BUSY pin (open-drain, active-low) and software-accessible status bits (I/O3, I/O5, I/O6, I/O7) for VPP level, erase/program success, toggle bit, and data polling - configurable via a nonvolatile 2-bit configuration register defaulting to "00".
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (1,048,576 × 16-bit or 2,097,152 × 8-bit) |
| Access Time | 70 ns - guarantees maximum read latency under worst-case VCC = 2.65V, TA = +85°C |
| Supply Voltage | 2.65V to 3.3V - enables direct interface with 3.3V logic without level shifters |
| Sector Architecture | 39 sectors: thirty-one 64KB + eight 8KB - allows granular firmware update without full chip erase |
| Program Time | 20 µs per word - enables high-throughput field updates in boot loader routines |
| Erase Time | 300 ms per sector - deterministic timing simplifies timeout handling in host firmware |
| Standby Current | 10 µA - supports low-power retention in battery-backed systems |
Pinout & Package
AT49LV161T-70CI is available in 48-lead TSOP Type I and 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 alias on I/O15 in byte mode |
| I/O0–I/O15 | Data I/O (x16) / I/O0–I/O7 + A-1 (x8) | BYTE pin selects mode: x16 uses all 16 lines; x8 tri-states I/O8–I/O14 and repurposes I/O15 as LSB address |
| CE, OE, WE | Chip/Output/Write Enable | Dual-line control (CE+OE) prevents bus contention; WE latches command/data on rising edge |
| RDY/BUSY | Open-Drain Status Output | Active-low signal indicates ongoing program/erase; supports wired-OR of multiple devices |
| VPP | Program/Erase Voltage Input | Enables accelerated operation at 5V or 12V; inhibits programming if < 0.8V |
| RESET | Hardware Initialization | Forces read/standby mode and halts active operations; required to exit suspend states |
| BYTE | Mode Selection | Logic high = x16 word mode; logic low = x8 byte mode - critical for 8-bit microcontroller interfacing |
Key Features
| Feature | Design Value |
|---|---|
| Sector Lockdown | Per-sector write protection activated via 6-cycle command; preserves boot code during field updates |
| Erase/Program Suspend | 15 µs suspend latency enables concurrent read from unprotected sectors during erase/program |
| 128-bit Protection Register | Factory-programmed Block A + user-writable/lockable Block B for secure firmware authentication |
| VPP-Accelerated Operations | 5V or 12V on VPP reduces program/erase times vs. VCC-only mode - verified in datasheet timing tables |
| Hardware Data Protection | VCC sense, noise filtering (<15 ns), and control pin logic inhibit accidental writes - no external watchdog needed |
Applications
| Industrial PLC Firmware Storage | Telecom Baseband Boot Memory |
|---|---|
Use Scenario: Storing boot firmware and configuration parameters in programmable logic controllers operating in extended temperature ranges (-40°C to +85°C). IC Role / Device Role / Timing Role: Nonvolatile code storage with sector lockdown protecting bootloader while allowing application partition updates. Use Value: Eliminates need for external write-protection hardware; 70 ns access ensures real-time execution from flash without caching. |
Use Scenario: Holding DSP initialization code and calibration data in wireless infrastructure equipment requiring field-upgradable firmware. IC Role / Device Role / Timing Role: Parallel x16 interface provides bandwidth for fast boot; RDY/BUSY pin synchronizes host processor with erase cycles. Use Value: Suspend/resume capability enables background sector erasure while servicing real-time traffic - no system stall. |
| Medical Diagnostic Device BIOS | Automotive ECU Calibration Storage |
Use Scenario: Secure storage of device-specific calibration constants and safety-critical startup routines in FDA-regulated imaging systems. IC Role / Device Role / Timing Role: 128-bit protection register (Block B locked) binds firmware to hardware; sector lockdown prevents unauthorized modification. Use Value: Meets IEC 62304 traceability requirements via immutable factory ID (Block A) and auditable user data (Block B). |
Use Scenario: Retaining engine calibration maps and emission control parameters in engine control units exposed to automotive temperature cycling. IC Role / Device Role / Timing Role: Low 10 µA standby current extends battery life during vehicle sleep mode; VPP acceleration enables rapid reprogramming at service centers. Use Value: 300 ms sector erase time enables sub-second map updates - critical for dealership flash tools meeting OEM timing specs. |
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, single 3.0V supply; lacks RDY/BUSY pin and suspend/resume | No hardware status signaling - requires polling I/O6/I/O7; no concurrent read during erase | Choose for cost-sensitive designs where firmware update concurrency is not required |
| MX29LV160ETTI-70G | 48-pin TSOP, 70 ns, 16 Mbit, 3.0V; includes RDY/BUSY but no VPP pin or 128-bit protection register | Supports suspend/resume and sector lockdown, but no factory-unique ID or user-lockable security block | Choose when hardware status signaling is essential but cryptographic binding is handled externally |
Compared with SST39VF1601C-70-4C-EKE and MX29LV160ETTI-70G, the AT49LV161T-70CI uniquely combines RDY/BUSY signaling, VPP acceleration, and 128-bit protection - enabling faster, safer, and more deterministic firmware updates in safety-critical embedded systems.
Availability
AT49LV161T-70CI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, telecom baseband boot memory, medical diagnostic BIOS, and automotive ECU calibration storage requiring stable component supply across extended product lifecycles.
Supply support for AT49LV161T-70CI 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 AT49LV161T-70CI. The company specializes in secure, reliable microcontrollers and nonvolatile memory for industrial and automotive applications.
The AT49BV/LV16X(T) family was designed for in-system programmable boot code storage in resource-constrained embedded systems, emphasizing data integrity, sector-level flexibility, and hardware-assisted security features like lockdown and protection registers.
FAQ
What voltage range does the AT49LV161T-70CI support for normal read/write operation?
The AT49LV161T-70CI operates with a single supply voltage of 2.65V to 3.3V for both read and write functions. This range ensures compatibility with standard 3.3V logic families without level translation. Operation outside this range - such as below 2.65V - disables programming via VCC sense circuitry, and voltages above 3.3V may exceed absolute maximum ratings and risk damage.
Does the AT49LV161T-70CI support both byte and word data interfaces?
Yes, the AT49LV161T-70CI supports both modes via the BYTE pin. When BYTE = high, it operates in 16-bit word mode with I/O0–I/O15 active. When BYTE = low, it switches to 8-bit byte mode: I/O0–I/O7 carry data, I/O8–I/O14 are tri-stated, and I/O15 functions as the A-1 address input. This dual-mode capability enables seamless integration with both 8-bit and 16-bit microcontrollers.
How does the RDY/BUSY pin on the AT49LV161T-70CI function during program or erase cycles?
The RDY/BUSY pin on the AT49LV161T-70CI is an open-drain output that is actively pulled low during internal program or erase operations and released (high-impedance) upon completion. This allows multiple AT49LV161T-70CI devices to share a common RDY/BUSY line using wired-OR logic. Unlike polling-based methods, it eliminates software overhead and guarantees precise timing synchronization for host processors.
Can the AT49LV161T-70CI be used in systems requiring secure firmware authentication?
Yes, the AT49LV161T-70CI includes a 128-bit protection register with two 64-bit blocks: Block A is factory-programmed with a unique identifier and cannot be altered, while Block B is user-programmable and lockable. Once Block B is locked via the Lock Protection Register command, its contents become immutable - enabling hardware-rooted firmware binding and anti-cloning mechanisms in certified medical or industrial systems.
What happens if a sector is locked down on the AT49LV161T-70CI and an erase command is issued to it?
If a sector has been locked down on the AT49LV161T-70CI and a Sector Erase command targets that sector, the operation terminates within 2 µs and sets the I/O5 erase/program status bit to "1", indicating failure. The device enters status-read mode and requires the Product ID Exit command to return to normal operation. Locked sectors remain readable but cannot be erased or programmed until a power cycle or RESET resets the lockdown state.
AT49LV161T-70CI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 48-TFBGA, CSPBGA
- 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:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-CBGA (6x8)
AT49LV161T-70CI FAQ
1.How can I place an order for AT49LV161T-70CI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV161T-70CI 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 AT49LV161T-70CI reliable?
The price and inventory of AT49LV161T-70CI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV161T-70CI is usually 5 days.
3.What payment methods are accepted for AT49LV161T-70CI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV161T-70CI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV161T-70CI?
AT49LV161T-70CI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV161T-70CI 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 AT49LV161T-70CI?
For technical support, including AT49LV161T-70CI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV161T-70CI requirements.
6.How does Aetrix verify that AT49LV161T-70CI is sourced from the original manufacturer or authorized distributors?
All AT49LV161T-70CI 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 AT49LV161T-70CI meets industry standards.
7.What is the process for return or replacement of AT49LV161T-70CI?
All AT49LV161T-70CI units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV161T-70CI, 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 AT49LV161T-70CI part is unused and in its original packaging.
Return procedure for AT49LV161T-70CI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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