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Microchip Technology AT49BV161-90TI
- Part No.:
- AT49BV161-90TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV161-90TI.pdf
- Description:
- IC FLASH 16MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,311
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Product details
Overview
AT49BV161-90TI 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 data interface controlled by the BYTE pin. It supports in-system programming in embedded microcontroller boot code storage applications.
For engineers reviewing the AT49BV161-90TI datasheet, AT49BV161-90TI pinout, AT49BV161-90TI application, or AT49BV161-90TI equivalent, key selection considerations include sector lockdown capability, RDY/BUSY open-drain output, VPP-accelerated erase/program, suspend/resume functionality, and TSOP/CBGA package compatibility for space-constrained industrial control designs.
Technical Context
The AT49BV161-90TI implements a command-register-based Flash architecture with 39 independently erasable sectors (31 × 64KB + 8 × 8KB), internal write-state machine, and configurable status reporting via I/O5/I/O6/I/O7 or RDY/BUSY. It uses standard microprocessor timing for CE/WE/OE-controlled read/write cycles.
Its dual-mode interface-enabled by the BYTE pin-supports x16 word mode (I/O0–I/O15 active) or x8 byte mode (I/O0–I/O7 active, I/O15 repurposed as A−1 LSB address input)-enabling flexible integration with 8-bit and 16-bit bus systems without external logic.
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 - determines maximum sustained read throughput in high-speed microcontroller interfaces |
| Supply Voltage | 2.65V to 3.3V - enables direct connection to 3.3V system rails without level-shifting |
| Program Time | 20 µs per word - defines minimum write latency for firmware patching or configuration updates |
| Sector Erase Time | 300 ms per sector - sets worst-case delay for updating protected boot code regions |
| Standby Current | 10 µA - ensures ultra-low power retention during system sleep modes |
| Operating Temp | −40°C to +85°C - qualified for industrial temperature range operation |
Pinout & Package
AT49BV161-90TI is available in 48-lead TSOP Type I and 45-ball/48-ball CBGA packages. Pin functions are identical across both packages except for ball/pad mapping; all signals support 5.5V-tolerant inputs (A0–A19, CE, OE, WE, RESET, BYTE).
| 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 bidirectional data bus; BYTE pin selects mode - critical for 8/16-bit MCU compatibility |
| CE, OE, WE | Chip/Output/Write Enable | Three independent controls prevent bus contention; OE/CE low + WE high = read mode |
| BYTE | Mode Select Input | Logic high = x16 word mode; logic low = x8 byte mode with I/O15 → A−1 - no external glue logic required |
| RDY/BUSY | Open-Drain Status Output | Actively pulled low during program/erase; supports wired-OR of multiple devices on shared status line |
| VPP | Program/Erase Power Supply | Enables accelerated operations at 5V or 12V; inhibits programming if <0.8V - hardware write protection |
| RESET | Hardware Initialization | Forces high-impedance outputs and resets internal state; required to exit suspend/resume or error states |
Key Features
| Feature | Design Value |
|---|---|
| Sector Lockdown | Per-sector write-protection activation via 6-cycle command; prevents accidental overwrite of boot code after field deployment |
| Erase/Program Suspend | Interrupt long erase (300 ms) or program (20 µs) to read/program other sectors - enables real-time firmware update without halting system operation |
| 128-bit Protection Register | Factory-programmed 64-bit block A + user-programmable/lockable 64-bit block B - supports secure device authentication and anti-cloning |
| VPP-Controlled Acceleration | 5V or 12V on VPP reduces program/erase times vs. VCC-only operation - allows trade-off between speed and board-level voltage generation complexity |
| Hardware Data Protection | Five-layer safeguard: VCC sense (<1.8V inhibit), noise filtering (<15 ns pulse rejection), CE/OE/WE/VPP logic validation - eliminates spurious writes in noisy environments |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
Use Scenario: Storing certified boot loader and safety-critical initialization routines in programmable logic controllers requiring field-upgradable firmware with tamper resistance. IC Role / Device Role / Timing Role: Non-volatile boot memory mapped to MCU reset vector; provides deterministic 70 ns read access during cold start. Use Value: Sector lockdown prevents unauthorized modification of safety firmware; 10 µA standby current extends battery-backed operation during maintenance outages. | Use Scenario: Holding FDA-approved diagnostic application code in portable ultrasound or infusion pump systems where data integrity and regulatory traceability are mandatory. IC Role / Device Role / Timing Role: Primary x16 Flash storage for executable image; RDY/BUSY pin synchronizes firmware update verification with host processor. Use Value: 128-bit protection register enables cryptographic binding of firmware hash to device identity; VPP acceleration shortens production-line programming time. |
| Automotive Body Control Module | Telecom Base Station Configuration |
Use Scenario: Storing vehicle-specific calibration tables and CAN protocol stack in body control units exposed to −40°C to +85°C ambient conditions. IC Role / Device Role / Timing Role: Dual-mode (x8/x16) interface adapts to legacy 8-bit microcontrollers or modern 16-bit SoCs; CE/OE/WE timing complies with automotive ASAM standards. Use Value: TSOP package supports reflow soldering in high-volume automotive PCB assembly; sector erase isolates calibration updates from core firmware. | Use Scenario: Maintaining carrier-specific radio parameter sets and encryption keys in 4G/5G remote radio units requiring zero-downtime configuration swaps. IC Role / Device Role / Timing Role: Secure configuration store with suspend/resume - allows live parameter reload while baseband processing continues uninterrupted. Use Value: Erase suspend enables concurrent read of active config while writing new parameters to alternate sector; 30 mA active current minimizes thermal load in sealed enclosures. |
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, 3.0–3.6V supply; lacks RDY/BUSY pin and sector lockdown | No hardware-assisted boot code protection; requires software-managed sector locking | Select when RDY/BUSY signaling and factory-lockable sectors are not required; lower cost for basic firmware storage |
| MX29LV160ETTI-70G | 48-pin TSOP, 70 ns access, 16 Mbit x16, 3.0–3.6V; includes CFI compliance and 12-byte protection register (vs. 128-bit) | CFI interface simplifies auto-detection in BIOS/bootloader but offers less granular security than 128-bit register | Select for PC-compatible or UEFI-based platforms needing standardized Flash interrogation; not suitable for high-security medical/industrial use |
Compared with SST39VF1601C-70-4C-EKE and MX29LV160ETTI-70G, the AT49BV161-90TI uniquely combines RDY/BUSY hardware status signaling, per-sector lockdown, and 128-bit cryptographic protection - making it optimal for safety-certified and anti-tamper applications where firmware integrity is non-negotiable.
Availability
AT49BV161-90TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code retention, and automotive body control module applications requiring stable component supply across extended product lifecycles.
Supply support for AT49BV161-90TI 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 is a global semiconductor company specializing in microcontrollers, analog components, and Flash memory solutions for industrial, automotive, and communications markets.
The AT49BV/LV16X(T) family was designed specifically for reliable, in-system programmable boot code storage in resource-constrained embedded systems requiring sector-level security and real-time update capability.
FAQ
What is the difference between AT49BV161-90TI and AT49BV160-90TI?
The AT49BV161-90TI supports configurable byte/word operation via the BYTE pin, whereas the AT49BV160-90TI operates exclusively in x16 word mode. This makes AT49BV161-90TI compatible with both 8-bit and 16-bit microcontrollers without external bus translators. The AT49BV161-90TI also includes the RDY/BUSY pin, which is absent in the AT49BV160-90TI - enabling hardware-synchronized erase/program completion detection.
Does AT49BV161-90TI support in-system programming with a 3.3V supply only?
Yes, AT49BV161-90TI supports full read, program, and erase operations using only a 3.3V supply (2.65V–3.3V). VPP is optional: when held below 0.8V, program/erase is inhibited; at 1.65V–VCC, VCC powers operations; at 5V or 12V, VPP accelerates timing. No external high-voltage generator is required for basic ISP functionality.
How does sector lockdown work on AT49BV161-90TI?
Sector lockdown on AT49BV161-90TI is enabled per sector using a six-bus-cycle command (555h/AAh, AAh/55h, 555h/80h, 555h/AAh, AAh/55h, SA/60h). Once locked, the sector becomes read-only until power cycle or RESET. Lock status is verified by reading address 00002h within the sector: I/O0 = high indicates lockdown active. AT49BV161-90TI retains this state across power cycles unless explicitly unlocked via reset.
Can AT49BV161-90TI be used in byte mode with an 8-bit microcontroller?
Yes - when the BYTE pin is driven low, AT49BV161-90TI operates in x8 mode: I/O0–I/O7 become active data lines, I/O8–I/O14 tri-state, and I/O15 functions as A−1 (LSB address input). This allows seamless 8-bit bus interfacing without external multiplexers or address latches, preserving full 20-bit addressing capability (A0–A19 + A−1).
What status monitoring methods does AT49BV161-90TI provide for program/erase completion?
AT49BV161-90TI provides three concurrent status methods: (1) RDY/BUSY pin (open-drain, actively low during operation), (2) Data Polling on I/O7 (complement-of-data toggle), and (3) Toggle Bit on I/O6 (repeated reads cause toggling). All methods require checking I/O5 (erase/program error) and I/O3 (VPP fault) to confirm successful completion - per Figures 1–4 in the datasheet.
AT49BV161-90TI 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:
- 90 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
AT49BV161-90TI FAQ
1.How can I place an order for AT49BV161-90TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV161-90TI 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 AT49BV161-90TI reliable?
The price and inventory of AT49BV161-90TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV161-90TI is usually 5 days.
3.What payment methods are accepted for AT49BV161-90TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV161-90TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV161-90TI?
AT49BV161-90TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV161-90TI 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 AT49BV161-90TI?
For technical support, including AT49BV161-90TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV161-90TI requirements.
6.How does Aetrix verify that AT49BV161-90TI is sourced from the original manufacturer or authorized distributors?
All AT49BV161-90TI 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 AT49BV161-90TI meets industry standards.
7.What is the process for return or replacement of AT49BV161-90TI?
All AT49BV161-90TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV161-90TI, 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 AT49BV161-90TI part is unused and in its original packaging.
Return procedure for AT49BV161-90TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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