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Microchip Technology AT49LV161-70CI
- Part No.:
- AT49LV161-70CI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFBGA, CSPBGA
- Datasheet:
-
AT49LV161-70CI.pdf
- Description:
- IC FLASH 16MBIT PARALLEL 48CBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,450
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Product details
Overview
AT49LV161-70CI from Microchip Technology (formerly Atmel) is a 16-Mbit (1M × 16 / 2M × 8) 3.0V-only parallel 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 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 AT49LV161-70CI datasheet, AT49LV161-70CI pinout, AT49LV161-70CI application, or AT49LV161-70CI equivalent, key selection considerations include its TSOP-48/CBGA-45/48 package options, RDY/BUSY open-drain output, sector lockdown security, suspend/resume capability during erase/program, and VPP-assisted accelerated programming at 5V or 12V.
Technical Context
The AT49LV161-70CI implements a command-register-based architecture with internal write state machine, supporting six-byte software command sequences for chip/sector erase, program, lockdown, and protection register control. Its dual-bus-cycle status detection uses I/O5 (erase/program fail), I/O3 (VPP level), and I/O7/I/O6 (data polling/toggle bit) to signal operation completion or error.
It features hardware data protection including VCC sense (<1.8V inhibit), 10 ms VCC power-on delay, noise filtering (<15 ns pulse rejection), and VPP voltage validation. The device powers on in read mode and requires explicit command entry to enter program or erase states-no automatic transitions occur.
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 - single-supply operation enables direct interface with 3.3V logic without level shifters |
| Program Time | 20 µs per word - fixed internal timing eliminates need for external timing control during write |
| Sector Erase Time | 300 ms max per sector - deterministic internal timing allows predictable firmware timeout handling |
| Standby Current | 10 µA - enables ultra-low-power retention in battery-backed systems |
| Operating Temp | -40°C to +85°C - qualified for industrial temperature range per CI suffix |
Pinout & Package
AT49LV161-70CI is available in 48-pin TSOP Type I (JEDEC MO-142AA) and 45-ball CBGA (Microchip SGA-45-1) packages. Pin functions are identical across both packages except for NC placements and ball/pad mapping.
| 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) | Configurable 16-bit or 8-bit data path; BYTE pin selects mode; I/O15 serves as LSB address in byte mode |
| CE, OE, WE | Chip/Output/Write Enable | Three independent controls prevent bus contention; standard microprocessor timing compatible |
| RDY/BUSY | Open-drain status output | Actively pulled low during erase/program; supports wired-OR of multiple devices on shared line |
| VPP | Program/Erase voltage select | Enables accelerated programming at 5V/12V; inhibits writes if <0.8V; ignored if within 0.3V of VCC |
| RESET | Hardware initialization | Halts ongoing operation and forces high-impedance outputs; required to exit suspend or error states |
| BYTE | Mode select input | Logic high = x16 word mode (I/O0–I/O15 active); logic low = x8 byte mode (I/O0–I/O7 active, I/O15 = A-1) |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Architecture | 39 independently lockable sectors (31 × 64KB + 8 × 8KB) enables selective firmware updates without full chip erase |
| Erase/Program Suspend | Allows real-time read access to non-erasing sectors during background erase, critical for multitasking boot loaders |
| 128-bit Protection Register | Factory-programmed Block A + user-programmable Block B (lockable) provides secure boot code authentication and anti-cloning |
| VPP-Assisted Acceleration | Reduces program/erase times by >50% when 5V or 12V applied to VPP-verified in production programming fixtures |
| Hardware Data Protection | Five-layer protection (VCC sense, power-on delay, control-line gating, noise filter, VPP validation) prevents accidental writes in noisy environments |
Applications
| Industrial PLC Firmware Storage | Telecom Baseband Boot Memory |
|---|---|
Use Scenario: Stores boot loader and FPGA configuration bitstreams in programmable logic controllers operating in factory-floor environments with EMI and thermal cycling. IC Role / Device Role / Timing Role: Non-volatile parallel Flash memory providing x16 interface to ARM9 host processor; 70 ns access ensures deterministic boot timing. Use Value: Sector lockdown protects bootloader integrity while allowing field-upgradable application firmware in unprotected sectors. | Use Scenario: Holds DSP firmware and calibration tables in 3G/4G radio units requiring secure, field-upgradable code storage with tamper resistance. IC Role / Device Role / Timing Role: Boot memory mapped to CPU address space; RDY/BUSY pin synchronizes firmware load with RF subsystem initialization. Use Value: 128-bit protection register enables cryptographic binding of firmware images to hardware, preventing unauthorized firmware injection. |
| Medical Imaging System BIOS | Automotive Infotainment Head Unit |
Use Scenario: Stores diagnostic BIOS and safety-critical startup routines in MRI and CT scanner mainboards where data retention over 20 years is mandated. IC Role / Device Role / Timing Role: Parallel Flash accessed via PCI bridge; BYTE pin configured for x8 mode to match legacy controller bus width. Use Value: 10 µA standby current minimizes power draw during idle periods without compromising data retention at +85°C. | Use Scenario: Hosts infotainment OS kernel and UI assets in automotive head units subject to -40°C to +85°C ambient and ISO 16750-2 electrical transients. IC Role / Device Role / Timing Role: Primary boot device interfaced to i.MX6 processor; TSOP-48 package selected for reflow compatibility with automotive PCB assembly. Use Value: Hardware data protection prevents corruption during vehicle battery brownouts or jump-start events. |
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, but lacks RDY/BUSY pin and suspend/resume feature | No hardware suspend capability limits use in real-time multitasking systems | Select when RDY/BUSY and suspend/resume are not required and cost is primary driver |
| MX29LV160ETTI-70G | 48-pin TSOP, 70 ns, 16 Mbit, includes RDY/BUSY but no 128-bit protection register or VPP acceleration | Lacks factory-programmed security block, limiting suitability for certified medical/automotive boot chains | Select when basic sector-locked Flash suffices and extended security features are unnecessary |
Compared with SST39VF1601C-70-4C-EKE and MX29LV160ETTI-70G, the AT49LV161-70CI uniquely combines RDY/BUSY signaling, full erase/program suspend/resume, and factory-seeded 128-bit protection-making it the only option among the three qualified for safety-critical boot applications requiring concurrent operation and cryptographic binding.
Availability
AT49LV161-70CI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, telecom baseband boot memory, medical imaging system BIOS, and automotive infotainment head units requiring stable component supply across extended product lifecycles.
Supply support for AT49LV161-70CI 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 the AT49LV series Flash memories, including long-term manufacturing, documentation, and technical assistance.
The AT49LV161-70CI belongs to Microchip's legacy parallel Flash product line designed specifically for reliable, in-system programmable boot memory in resource-constrained embedded systems with strict timing and security requirements.
FAQ
What is the guaranteed access time for AT49LV161-70CI across its full operating temperature range?
The AT49LV161-70CI guarantees 70 ns maximum access time over the full industrial temperature range of -40°C to +85°C, measured under worst-case conditions (VCC = 2.65V, CL = 30 pF). This specification is validated per JEDEC JESD22-A108 and appears in the official Microchip datasheet revision 1427L, ensuring deterministic read performance in time-critical boot sequences.
Does AT49LV161-70CI support both byte and word data interfaces, and how is mode selection implemented?
Yes, AT49LV161-70CI supports both 8-bit and 16-bit data interfaces. Mode selection is controlled by the BYTE pin: logic high configures the device for x16 word mode (I/O0–I/O15 active), while logic low enables x8 byte mode (I/O0–I/O7 active, I/O15 repurposed as A-1 address input). This dual-mode capability allows seamless integration with either 8-bit or 16-bit microcontrollers without external glue logic.
How does the RDY/BUSY pin on AT49LV161-70CI function during erase and program operations?
The RDY/BUSY pin on AT49LV161-70CI is an open-drain output that is actively pulled low during internal program or erase cycles and released (high-impedance) upon completion. This allows wired-OR connection of multiple AT49LV161-70CI devices to a single system RDY line. Unlike polling status bits, RDY/BUSY provides hardware-synchronized, zero-software-overhead operation status indication.
Can AT49LV161-70CI be programmed using only the VCC supply, or is an external VPP voltage required?
AT49LV161-70CI can be programmed using only the VCC supply (2.65–3.3V)-no external VPP is required for basic operation. However, applying 5.0V ±0.5V or 12.0V ±0.5V to the VPP pin accelerates program and erase times by >50%. If VPP is left unconnected or below 0.8V, programming remains fully functional but operates at standard speed.
What security mechanisms does AT49LV161-70CI provide to protect boot code from unauthorized modification?
AT49LV161-70CI provides three layered security mechanisms: (1) per-sector lockdown via six-byte command, permanently disabling erase/program on selected sectors; (2) 128-bit protection register with factory-programmed Block A and user-lockable Block B for cryptographic binding; and (3) hardware data protection including VCC sense, noise filtering, and VPP validation to prevent accidental writes during power transients.
AT49LV161-70CI 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)
AT49LV161-70CI FAQ
1.How can I place an order for AT49LV161-70CI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV161-70CI 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 AT49LV161-70CI reliable?
The price and inventory of AT49LV161-70CI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV161-70CI is usually 5 days.
3.What payment methods are accepted for AT49LV161-70CI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV161-70CI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV161-70CI?
AT49LV161-70CI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV161-70CI 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 AT49LV161-70CI?
For technical support, including AT49LV161-70CI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV161-70CI requirements.
6.How does Aetrix verify that AT49LV161-70CI is sourced from the original manufacturer or authorized distributors?
All AT49LV161-70CI 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 AT49LV161-70CI meets industry standards.
7.What is the process for return or replacement of AT49LV161-70CI?
All AT49LV161-70CI units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV161-70CI, 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 AT49LV161-70CI part is unused and in its original packaging.
Return procedure for AT49LV161-70CI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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