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Microchip Technology AT49LV161-70TI
- Part No.:
- AT49LV161-70TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49LV161-70TI.pdf
- Description:
- IC FLASH 16MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,003
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Product details
Overview
AT49LV161-70TI 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 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 legacy microprocessor systems.
For engineers reviewing the AT49LV161-70TI datasheet, AT49LV161-70TI pinout, AT49LV161-70TI application, or AT49LV161-70TI equivalent, key selection considerations include TSOP/CBGA package compatibility, sector lockdown security, RDY/BUSY open-drain signaling, VPP-assisted accelerated programming, and suspend/resume capability during erase or program cycles.
Technical Context
This device implements a command-register-based parallel Flash architecture with 39 independently erasable sectors (31 × 64 KB + 8 × 8 KB), internal write state machine, and configurable status reporting via I/O pins (I/O3, I/O5, I/O6, I/O7) or dedicated RDY/BUSY output. It uses standard microprocessor bus timing with CE/OE/WE control and supports both hardware and software product identification.
The AT49LV161-70TI features dual-voltage-programming support: VPP ≥ 1.65V enables normal program/erase; VPP = 5.0V ± 0.5V or 12.0V ± 0.5V accelerates operations. Its configuration register (default "00") determines post-operation read-mode recovery behavior and governs I/O7 status interpretation during Data Polling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (1,048,576 × 16-bit words or 2,097,152 × 8-bit bytes) |
| Access Time | 70 ns - defines maximum address-to-valid-data delay in read mode under specified VCC and load conditions |
| Supply Voltage Range | 2.65V to 3.3V - enables direct interface with 3.3V logic without level shifters |
| Program Time | 20 µs per word - determines minimum time between successive write commands in single-pulse or standard mode |
| Sector Erase Time | 300 ms max - sets worst-case latency when updating firmware partitions or configuration blocks |
| Standby Current | 10 µA - ensures ultra-low power retention during system sleep states |
| Active Current | 30 mA - specifies peak current draw during read or program operations |
Pinout & Package
AT49LV161-70TI is available in 48-pin TSOP Type I and 45-/48-ball CBGA packages. Pin functions are identical across packages except for ball/pad mapping; all variants support BYTE-controlled x8/x16 data width selection and share common control, address, and I/O signal definitions.
| 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 bidirectional data bus; BYTE=1 → x16 mode; BYTE=0 → x8 mode with I/O15 repurposed as LSB address |
| CE, OE, WE | Chip Enable, Output Enable, Write Enable | Three-line control prevents bus contention; supports standard microprocessor timing protocols |
| BYTE | Mode Select Input | Logic high enables 16-bit data path; logic low enables 8-bit path with tri-stated upper I/Os and A-1 function on I/O15 |
| RDY/BUSY | Open-Drain Status Output | Actively pulled low during internal program/erase; allows wired-OR of multiple devices on shared status line |
| VPP | Program/Erase Voltage Input | Enables write protection below 0.8V; selects VCC or external 5V/12V for accelerated programming based on voltage threshold |
| RESET | Hardware Initialization Input | Forces high-impedance outputs and resets internal state; required to exit suspend modes or recover from failed operations |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Architecture | 39 independent sectors (31 × 64 KB + 8 × 8 KB) enable granular firmware updates without full chip erase |
| Erase/Program Suspend & Resume | Allows real-time reading from non-erasing sectors during background erase, critical for responsive boot loaders |
| 128-bit Protection Register | Factory-programmed Block A + user-programmable Block B (lockable) provides secure storage for keys or calibration data |
| Hardware Data Protection | VCC sense, noise filtering (<15 ns), and VPP validation prevent spurious writes during power transients or EMI events |
| Top/Bottom Boot Block Configuration | Supports flexible boot code placement-critical for systems requiring fail-safe startup from protected memory regions |
Applications
| Industrial PLC Firmware Storage | Legacy x86 BIOS Boot Code |
|---|---|
Use Scenario: Storing field-upgradable ladder logic and I/O configuration in programmable logic controllers operating in harsh environments. IC Role / Device Role / Timing Role: Nonvolatile boot memory mapped to CPU address space; accessed via parallel bus during cold start and runtime reconfiguration. Use Value: Sector lockdown protects core runtime firmware while allowing safe update of application modules without risk of corruption. | Use Scenario: Hosting legacy PC BIOS code in embedded industrial motherboards where SPI Flash is unsupported by chipset. IC Role / Device Role / Timing Role: x16 parallel Flash memory providing <70 ns instruction fetch latency to 80486/Pentium-class processors. Use Value: RDY/BUSY pin enables precise timing coordination with CPU wait-state generators during flash programming sequences. |
| Medical Device Calibration Data | Avionics System Bootloader |
Use Scenario: Secure storage of sensor calibration coefficients and regulatory compliance logs in Class II medical equipment. IC Role / Device Role / Timing Role: Protected memory partition accessed only by trusted bootloader; 128-bit register stores encrypted integrity signatures. Use Value: Block B lockout prevents accidental overwrites during service calibration, ensuring traceability and audit readiness. | Use Scenario: Storing DO-254-compliant bootloader firmware in airborne computing units requiring deterministic erase/write timing. IC Role / Device Role / Timing Role: Top-boot configured Flash providing verified startup code with hardware reset recovery and suspend-aware update protocol. Use Value: 300 ms sector erase time and suspend/resume capability allow safe in-flight firmware patching without interrupting mission-critical tasks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF1601C-70-4C-EKE | 48-pin TSOP, 70 ns access, 16 Mbit, 2.7–3.6V supply; lacks RDY/BUSY pin and VPP acceleration | No hardware suspend signaling; relies solely on toggle bit/data polling; no VPP-assisted programming | Select when RDY/BUSY wiring is unavailable and VPP circuitry is omitted from PCB design |
| MX29LV160ETTI-70G | 48-pin TSOP, 70 ns access, 16 Mbit, 2.7–3.6V; includes CFI query support but no 128-bit protection register | CFI-compliant for auto-configuration in generic flash drivers; no factory-unique ID or user-lockable security block | Choose for Linux/UEFI systems requiring standardized flash detection and driver compatibility |
Compared with SST39VF1601C-70-4C-EKE and MX29LV160ETTI-70G, the AT49LV161-70TI uniquely combines RDY/BUSY signaling, VPP-accelerated programming, and a factory-programmed 64-bit security block-making it optimal for safety-critical or proprietary firmware deployments where timing determinism and hardware-enforced protection are mandatory.
Availability
AT49LV161-70TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy x86 BIOS boot code, medical device calibration data, and avionics system bootloaders requiring stable component supply across extended product lifecycles.
Supply support for AT49LV161-70TI 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 support for legacy Atmel Flash products including the AT49LV series.
The AT49LV161-70TI belongs to Atmel's parallel Flash memory product line, designed specifically for embedded systems requiring reliable, in-system programmable nonvolatile storage with hardware-level security and deterministic timing for boot and firmware applications.
FAQ
What is the correct power-up sequence for AT49LV161-70TI to ensure reliable initialization?
The AT49LV161-70TI powers on in read mode, but proper initialization requires VCC to stabilize within 2.65–3.3V before asserting RESET high. VPP must be either <0.8V (disabled) or ≥1.65V (enabled) prior to first access. Delaying CE/OE/WE activation until VCC is stable for ≥100 µs prevents spurious commands. This sequence ensures the configuration register defaults to "00" and avoids inadvertent entry into product ID or suspend modes during power ramp.
How does the BYTE pin affect address and data mapping in AT49LV161-70TI?
When BYTE = 1, AT49LV161-70TI operates in x16 mode: I/O0–I/O15 carry data, and A0–A19 provide full 20-bit addressing. When BYTE = 0, it switches to x8 mode: only I/O0–I/O7 are active for data, I/O15 becomes A-1 (LSB address), and I/O8–I/O14 are tri-stated. This dual-mode flexibility allows the same AT49LV161-70TI to interface with both 16-bit and 8-bit microcontrollers without redesigning the memory bus layout.
Can AT49LV161-70TI perform simultaneous read and program operations across different sectors?
Yes - the AT49LV161-70TI supports Erase Suspend and Program Suspend commands. After issuing Erase Suspend, the device halts the current sector erase and permits reads or writes to any other unerased sector within 15 µs. Similarly, Program Suspend allows reading any byte/word while suspending programming of another location. This capability is essential for real-time systems that must maintain responsiveness during firmware updates.
What happens if a sector lockdown command is issued to an already locked sector in AT49LV161-70TI?
Issuing a Sector Lockdown command to an already locked sector has no effect - the AT49LV161-70TI ignores redundant lockdown requests. Locked sectors remain read-only until a hardware RESET or power cycle clears the lockdown state. Attempting to erase or program a locked sector results in immediate termination (≤2 µs), I/O5 status bit assertion, and entry into status-read mode - requiring a Product ID Exit command to resume normal operation.
Is RDY/BUSY functionality available in all package variants of AT49LV161-70TI?
Yes - RDY/BUSY is a functional pin present in both 48-pin TSOP and 45-/48-ball CBGA variants of AT49LV161-70TI. The pin is open-drain and electrically identical across packages, enabling wired-OR connection of multiple AT49LV161-70TI devices on a shared status line. This feature simplifies system-level timing coordination without requiring additional GPIO resources from the host controller.
AT49LV161-70TI 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:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSOP
AT49LV161-70TI FAQ
1.How can I place an order for AT49LV161-70TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV161-70TI 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 AT49LV161-70TI reliable?
The price and inventory of AT49LV161-70TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV161-70TI is usually 5 days.
3.What payment methods are accepted for AT49LV161-70TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV161-70TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV161-70TI?
AT49LV161-70TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV161-70TI 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 AT49LV161-70TI?
For technical support, including AT49LV161-70TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV161-70TI requirements.
6.How does Aetrix verify that AT49LV161-70TI is sourced from the original manufacturer or authorized distributors?
All AT49LV161-70TI 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 AT49LV161-70TI meets industry standards.
7.What is the process for return or replacement of AT49LV161-70TI?
All AT49LV161-70TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV161-70TI, 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 AT49LV161-70TI part is unused and in its original packaging.
Return procedure for AT49LV161-70TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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