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Microchip Technology AT49LV161T-70TI
- Part No.:
- AT49LV161T-70TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49LV161T-70TI.pdf
- Description:
- IC FLASH 16MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,691
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Product details
Overview
AT49LV161T-70TI from Microchip Technology (formerly Atmel) is a 16-Mbit (1M × 16 / 2M × 8) 3.0V-only parallel Flash memory with 70 ns access time, sector erase architecture (31 × 64 KB + 8 × 8 KB), and suspend/resume capability for in-system programming. It supports byte/word mode selection via the BYTE pin and operates in TSOP or CBGA packages for embedded boot code storage.
For engineers reviewing the AT49LV161T-70TI datasheet, AT49LV161T-70TI pinout, AT49LV161T-70TI application, or AT49LV161T-70TI equivalent, key selection considerations include single-supply 2.65–3.3V operation, RDY/BUSY open-drain output, 128-bit protection register, sector lockdown, and VPP-assisted accelerated programming/erase.
Technical Context
The AT49LV161T-70TI implements a command-register-based architecture with internal write state machine, supporting six-byte chip erase, six-cycle sector erase, and four-cycle byte/word programming. Its dual-mode I/O interface (x16/x8) is controlled by the BYTE pin, enabling flexible bus-width integration in 8-bit or 16-bit microcontroller systems.
It features hardware data protection including VCC sense (<1.8V inhibit), noise filtering (<15 ns pulse rejection), and VPP voltage validation (I/O3 status bit). The RDY/BUSY pin provides active-low open-drain signaling synchronized to internal program/erase completion, enabling multi-device OR-tying without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (1,048,576 × 16 or 2,097,152 × 8), enabling full boot firmware storage for mid-complexity MCUs |
| Access Time | 70 ns max - meets timing requirements for 14 MHz asynchronous bus interfaces |
| Supply Voltage | 2.65–3.3V (BV range) - compatible with 3.3V system rails without level-shifting |
| Program Time | 20 µs per word - enables rapid field updates during production or maintenance |
| Sector Erase Time | 300 ms max per sector - allows selective firmware patching without full reflash |
| Standby Current | 10 µA - suitable for low-power battery-backed applications |
| Operating Temp | -40°C to +85°C - qualified for industrial temperature environments |
Pinout & Package
AT49LV161T-70TI is available in 48-pin TSOP Type I (300 mil) and 48-ball CBGA packages. Pin functions are identical across both packages per datasheet Rev. 1427L.
| 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 bus width: BYTE=1 → x16 mode; BYTE=0 → x8 mode with I/O15 repurposed as LSB address |
| CE, OE, WE | Chip Enable, Output Enable, Write Enable | Dual-line control (CE+OE) prevents bus contention; WE latches commands and data |
| RDY/BUSY | Open-drain status output | Active-low signal indicates internal program/erase activity; supports wired-OR for multi-device monitoring |
| VPP | Write protection & acceleration supply | Enables faster programming/erase at 5V or 12V; inhibits writes if <0.8V; validated via I/O3 status bit |
| RESET | Hardware initialization input | Halts ongoing operations and forces high-impedance outputs; required to exit suspend or error states |
| BYTE | Bus-width configuration select | Logic-high = x16 mode (I/O0–I/O15 active); logic-low = x8 mode (I/O0–I/O7 active, I/O15=A-1) |
Key Features
| Feature | Design Value |
|---|---|
| Suspend/Resume for Erase & Program | Enables concurrent read from non-erasing sectors or read during programming-critical for real-time firmware update without system freeze |
| Sector Lockdown | Per-sector write-protection via six-cycle command; preserves boot code integrity while allowing user data updates |
| 128-bit Protection Register | Factory-programmed 64-bit block A + user-programmable/lockable block B-supports secure device authentication and firmware binding |
| VPP-Assisted Acceleration | Reduces program/erase times when VPP = 5V or 12V; automatic VCC/VPP source selection avoids external switching logic |
| Hardware Data Protection | Five-layer safeguard: VCC sense, power-on delay, control-line inhibit, noise filter, and VPP validation-eliminates spurious writes in noisy environments |
Applications
| Industrial HMI Boot Storage | Medical Device Firmware Vault |
|---|---|
Use Scenario: Storing bootloader and safety-critical firmware in a panel-mounted HMI with isolated 3.3V supply and no external programmer access. IC Role / Device Role / Timing Role: Non-volatile boot memory providing deterministic 70 ns read access to MCU upon power-up; sector lockdown protects bootloader from accidental overwrite. Use Value: Ensures certified boot sequence integrity and enables field firmware patches to application sectors only-no risk of bricking the device. | Use Scenario: Securing FDA-regulated firmware images in portable diagnostic equipment requiring tamper-evident storage and audit-trail-capable updates. IC Role / Device Role / Timing Role: Trusted firmware repository with 128-bit protection register binding firmware to device identity; RDY/BUSY pin synchronizes update progress to host controller UI. Use Value: Meets IEC 62304 traceability requirements via locked block B registration and sector-level erase logging-no unlogged modifications possible. |
| Telecom Line Card Configuration | Automotive Body Control Module |
Use Scenario: Holding configuration profiles and calibration tables for hot-swappable line cards in carrier-grade DSLAMs operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Parallel Flash memory interfaced to FPGA or ARM9 controller; BYTE pin configured for x8 mode to match 8-bit local bus; TSOP package enables compact layout. Use Value: 10 µA standby current extends uptime during card idle states; sector erase permits per-port profile updates without disrupting active services. | Use Scenario: Storing ECU boot code and CAN message lookup tables in body control modules where vibration and thermal cycling demand robust non-volatility. IC Role / Device Role / Timing Role: Primary boot Flash with RESET-initiated recovery and VPP-enabled accelerated reprogramming during dealer service. Use Value: Hardware data protection prevents corruption from load-dump transients; suspend/resume allows diagnostics to read live memory during partial firmware update. |
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/x8, but lacks RDY/BUSY pin and VPP acceleration; uses different command set | No hardware suspend/resume or sector lockdown; requires software-managed erase sequencing | Choose when RDY/BUSY signaling and hardware protection are not required, and legacy SST command compatibility is preferred. |
| MX29LV160ETTI-70G | 48-pin TSOP, 70 ns, 16 Mbit x16/x8, includes RDY/BUSY and CFI support, but no 128-bit protection register or BYTE-pin-controlled mode switching | CFI compliance simplifies driver porting; lacks per-sector lockdown and factory-unique ID binding | Choose for standardized CFI-based systems needing broad toolchain support, where cryptographic binding is handled externally. |
Compared with SST39VF1601C-70-4C-EKE and MX29LV160ETTI-70G, the AT49LV161T-70TI uniquely combines hardware suspend/resume, sector lockdown, and 128-bit protection register in a single 3.0V parallel Flash-enabling secure, real-time firmware updates without software overhead or external security ICs.
Availability
AT49LV161T-70TI is available at Aetrix Electronics and suitable for industrial HMI, medical diagnostics, telecom line cards, and automotive body control modules requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for AT49LV161T-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 AT49LV161T-70TI belongs to Atmel's parallel Flash memory product line, designed specifically for reliable, in-system programmable boot code storage in resource-constrained industrial and automotive applications.
FAQ
What is the purpose of the BYTE pin on the AT49LV161T-70TI?
The BYTE pin on the AT49LV161T-70TI selects between x16 and x8 data bus configurations. When pulled high, the device operates in 16-bit mode with I/O0–I/O15 active. When pulled low, it switches to 8-bit 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 flexibility allows the AT49LV161T-70TI to interface seamlessly with both 8-bit and 16-bit microcontrollers without external glue logic.
How does the RDY/BUSY pin function on the AT49LV161T-70TI?
The RDY/BUSY pin on the AT49LV161T-70TI is an open-drain output that actively pulls low during internal program or erase cycles and releases (goes high-impedance) upon completion. It supports wired-OR connection with multiple devices on a shared status line. Unlike polling-based methods, RDY/BUSY provides deterministic hardware synchronization-critical for real-time systems where CPU polling would waste cycles or introduce latency in the AT49LV161T-70TI's operation.
Can the AT49LV161T-70TI be programmed using only the VCC supply, or is VPP required?
The AT49LV161T-70TI can be programmed and erased using only the VCC supply (2.65–3.3V); VPP is optional and used solely to accelerate programming and erase operations. When VPP is ≤ VCC or <1.65V, the device uses VCC. When VPP is set to 5.0V ±0.5V or 12.0V ±0.5V, it automatically selects VPP as the programming/erase source-reducing times significantly. VPP must never be left floating, and the AT49LV161T-70TI validates its level via I/O3 status bit to prevent invalid operations.
What happens if a sector is locked down on the AT49LV161T-70TI?
Once a sector is locked down on the AT49LV161T-70TI using the six-cycle Sector Lockdown command, that sector becomes permanently read-only until the next power cycle or hardware reset. Attempts to erase or program the locked sector will fail silently-the device enters status-read mode and sets the I/O5 erase/program status bit high. Locked sectors retain their contents across power loss and are ideal for storing immutable boot code. Unlocking requires only a reset or power cycle; no special unlock command exists.
Does the AT49LV161T-70TI support simultaneous read and program operations?
Yes-the AT49LV161T-70TI supports true concurrent operations via its Suspend/Resume feature. While erasing one sector, the host can read from or program any other non-erasing sector. Similarly, while programming one location, the host can read any other byte/word. Suspension takes ≤15 µs, and resume is immediate. This capability is implemented in hardware and requires no additional timing margins-making the AT49LV161T-70TI suitable for applications demanding zero-interrupt firmware updates.
AT49LV161T-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
AT49LV161T-70TI FAQ
1.How can I place an order for AT49LV161T-70TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV161T-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 AT49LV161T-70TI reliable?
The price and inventory of AT49LV161T-70TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV161T-70TI is usually 5 days.
3.What payment methods are accepted for AT49LV161T-70TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV161T-70TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV161T-70TI?
AT49LV161T-70TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV161T-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 AT49LV161T-70TI?
For technical support, including AT49LV161T-70TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV161T-70TI requirements.
6.How does Aetrix verify that AT49LV161T-70TI is sourced from the original manufacturer or authorized distributors?
All AT49LV161T-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 AT49LV161T-70TI meets industry standards.
7.What is the process for return or replacement of AT49LV161T-70TI?
All AT49LV161T-70TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV161T-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 AT49LV161T-70TI part is unused and in its original packaging.
Return procedure for AT49LV161T-70TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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