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Microchip Technology AT49BV161-90CI
- Part No.:
- AT49BV161-90CI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFBGA, CSPBGA
- Datasheet:
-
AT49BV161-90CI.pdf
- Description:
- IC FLASH 16MBIT PARALLEL 48CBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,642
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Product details
Overview
AT49BV161-90CI 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 support for byte/word programming in TSOP or CBGA packages. It enables in-system reprogramming in embedded controllers, BIOS storage, and firmware update modules.
For engineers reviewing the AT49BV161-90CI datasheet, AT49BV161-90CI pinout, AT49BV161-90CI application, or AT49BV161-90CI equivalent, key selection criteria include sector lockdown capability, RDY/BUSY open-drain signaling, BYTE-mode configurability, VPP-accelerated erase/program, and 128-bit protection register support for secure boot code storage.
Technical Context
The AT49BV161-90CI implements a command-register-based Flash architecture with 39 independently erasable sectors (31 × 64 KB + 8 × 8 KB), supporting both chip and sector erase via six-byte software commands. Its dual-mode I/O interface-configured by the BYTE pin-enables flexible x8 or x16 data bus operation without hardware redesign.
It integrates hardware data protection (VCC sense, noise filtering, program inhibit), suspend/resume functionality for concurrent read/program during erase, and status monitoring via RDY/BUSY, Data Polling (I/O7), Toggle Bit (I/O6), and dedicated status bits (I/O5, I/O3). The device powers on in read mode and uses internal state machines to manage erase/program timing without external clocks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (1,048,576 words × 16 bits or 2,097,152 bytes × 8 bits) |
| Access Time | 90 ns maximum - defines worst-case read latency under full VCC range (2.65–3.3V) |
| Supply Voltage | 2.65V to 3.3V - single-supply operation eliminates need for 5V or dual-rail support |
| Sector Architecture | 39 sectors: thirty-one 64 KB + eight 8 KB - enables granular firmware updates without full chip erase |
| Program Time | 20 µs per word - enables high-throughput field firmware patching |
| Erase Time | 300 ms per sector - deterministic timing supports real-time system scheduling |
| Standby Current | 10 µA - critical for battery-backed or low-power embedded applications |
| Operating Temp | -40°C to +85°C - qualified for industrial temperature range (CI suffix) |
Pinout & Package
AT49BV161-90CI is available in 48-pin TSOP Type I (JEDEC MO-142AA) and 45-ball/48-ball CBGA packages. The -90CI variant uses the 48-pin TSOP package with lead-free finish and industrial temperature rating.
| 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 data bus: BYTE=1 → x16 mode (I/O0–I/O15 active); BYTE=0 → x8 mode (I/O0–I/O7 active, I/O15=A-1) |
| BYTE | Bus Width Select | Hardware-configurable mode control - eliminates software bit-banging for bus-width adaptation |
| CE, OE, WE | Chip/Output/Write Enable | Dual-line CE/OE control prevents bus contention; WE latches command/data during programming cycles |
| RDY/BUSY | Open-Drain Status Output | Active-low signal indicates internal program/erase activity - supports wired-OR multi-device monitoring |
| VPP | Program/Erase Power Input | Enables accelerated operations at 5V or 12V; inhibits programming if <0.8V - provides hardware write lockout |
| RESET | Device Initialization | Halts ongoing operations and forces high-impedance outputs - essential for safe power-cycle recovery |
| VCCQ | Output Driver Supply | Separate 2.65–3.3V supply for I/O drivers - allows independent voltage scaling of core vs. interface |
Key Features
| Feature | Design Value |
|---|---|
| Sector Lockdown | Per-sector write-protection activation via software command - secures boot code while allowing runtime firmware updates elsewhere |
| Erase/Program Suspend | Interrupt long-duration erase/program to read or program other sectors - enables real-time responsiveness in multitasked systems |
| 128-bit Protection Register | Factory-programmed Block A + user-programmable Block B (lockable) - supports cryptographic key binding and anti-cloning |
| VPP-Controlled Acceleration | 5V or 12V on VPP reduces program/erase times - eliminates need for external high-voltage generators in production programmers |
| Hardware Data Protection | VCC sense, noise filtering (<15 ns), and control-line inhibit logic - prevents spurious writes during power transients or EMI events |
| Single-Pulse Program Mode | 6-byte entry sequence enables one-shot WE pulses for byte/word writes - simplifies firmware driver implementation |
Applications
| BIOS/UEFI Firmware Storage | Industrial PLC Configuration Memory |
|---|---|
Use Scenario: Storing boot firmware and UEFI variables in x86 server motherboards requiring field-upgradable, tamper-resistant nonvolatile memory. IC Role / Device Role / Timing Role: Primary boot code storage with sector lockdown protecting initial boot vector and recovery image. Use Value: Enables secure, atomic firmware updates without risking corruption of critical startup routines due to power loss or reset. | Use Scenario: Retaining ladder logic programs and I/O configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile parameter store with fast sector erase enabling rapid reconfiguration between production batches. Use Value: Reduces machine downtime during recipe changes by permitting selective sector erase instead of full flash reprogramming. |
| Medical Device Bootloader Storage | Automotive Telematics Module Firmware |
Use Scenario: Hosting certified bootloader code in Class II medical instruments where regulatory compliance mandates immutable boot integrity. IC Role / Device Role / Timing Role: Secure root-of-trust anchor with 128-bit protection register binding firmware signature keys to hardware identity. Use Value: Meets IEC 62304 requirements for verified boot by preventing unauthorized modification of bootloader execution path. | Use Scenario: Storing OTA-updatable firmware for cellular modem and GPS subsystems in connected vehicle ECUs operating across wide temperature ranges. IC Role / Device Role / Timing Role: Field-programmable code storage with RDY/BUSY signaling for coordinated multi-device firmware synchronization. Use Value: Ensures reliable over-the-air updates under automotive thermal stress (-40°C to +85°C) using deterministic 300 ms sector erase timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF1601C-90-4C-EKE | 48-pin TSOP, 16 Mbit, 90 ns, 3.0V, but lacks RDY/BUSY pin and 128-bit protection register | No hardware suspend/resume or sector lockdown - requires software-managed erase sequencing | Select when cost sensitivity outweighs need for secure boot features and real-time suspend capability |
| MX29LV160ETTI-90G | 48-pin TSOP, 16 Mbit, 90 ns, 3.0V, includes BYTE pin and sector protection, but no VPP acceleration or 128-bit register | Supports top/bottom boot block configuration and CFI query, but slower program time (50 µs vs. 20 µs) | Prefer for legacy CFI-compliant systems requiring standardized command sets and broader toolchain support |
Compared with SST39VF1601C-90-4C-EKE and MX29LV160ETTI-90G, the AT49BV161-90CI delivers unique value through integrated RDY/BUSY signaling, hardware-accelerated programming via VPP, and cryptographically enforceable sector lockdown - making it optimal for safety-critical and secure-boot applications where deterministic timing and tamper resistance are mandatory.
Availability
AT49BV161-90CI is available at Aetrix Electronics and suitable for BIOS storage, industrial PLC configuration, medical bootloader retention, and automotive telematics firmware requiring stable component supply across extended product lifecycles.
Supply support for AT49BV161-90CI 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 AT49BV/LV Flash family, including documentation, programming tools, and long-term supply commitments.
The AT49BV161-90CI belongs to Microchip's legacy parallel-interface Flash memory product line, designed specifically for embedded systems requiring in-system programmability, sector-level security, and industrial-grade reliability without external high-voltage circuitry.
FAQ
What does the "-90CI" suffix indicate in AT49BV161-90CI?
The "-90CI" suffix specifies three key attributes of the AT49BV161-90CI: "90" denotes 90 ns maximum access time; "C" indicates commercial voltage range (2.65–3.3V); and "I" certifies industrial temperature operation (-40°C to +85°C). This makes AT49BV161-90CI suitable for demanding embedded environments where thermal stability and timing predictability are critical.
How does the BYTE pin affect the operation of AT49BV161-90CI?
The BYTE pin on AT49BV161-90CI determines data bus width: when held high, the device operates in x16 mode with I/O0–I/O15 active; when pulled low, it switches to x8 mode where only I/O0–I/O7 drive data and I/O15 functions as the LSB address input (A-1). This hardware-selectable mode eliminates software configuration overhead and ensures compatibility with both 8-bit and 16-bit microcontroller buses.
Does AT49BV161-90CI support simultaneous read and program operations?
Yes, AT49BV161-90CI supports concurrent operations via its Erase Suspend and Program Suspend features. When erasing one sector, the system can suspend the operation and read or program any other non-erasing sector. Similarly, an active program operation can be suspended to read any byte/word elsewhere. This capability is implemented in hardware and requires no additional timing margins beyond the 15 µs suspend latency specified for AT49BV161-90CI.
What is the function of the RDY/BUSY pin on AT49BV161-90CI?
The RDY/BUSY pin on AT49BV161-90CI is an open-drain output that actively pulls low during internal program or erase cycles and releases (goes high-impedance) upon completion. Its wired-OR capability allows multiple AT49BV161-90CI devices to share a single system BUSY line, simplifying status monitoring in multi-flash architectures without requiring additional GPIO resources.
Can the 128-bit protection register in AT49BV161-90CI be used for secure key storage?
Yes, the 128-bit protection register in AT49BV161-90CI is explicitly designed for security-critical use: Block A contains factory-programmed unique identifiers, while Block B is user-writable and lockable. Once locked, Block B cannot be rewritten - enabling binding of cryptographic keys, device serial numbers, or firmware signatures to hardware identity. This feature is documented in the AT49BV161-90CI datasheet section "128-Bit Protection Register" and supported by dedicated Program/Lock commands.
AT49BV161-90CI 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:
- 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-CBGA (6x8)
AT49BV161-90CI FAQ
1.How can I place an order for AT49BV161-90CI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV161-90CI 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 AT49BV161-90CI reliable?
The price and inventory of AT49BV161-90CI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV161-90CI is usually 5 days.
3.What payment methods are accepted for AT49BV161-90CI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV161-90CI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV161-90CI?
AT49BV161-90CI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV161-90CI 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 AT49BV161-90CI?
For technical support, including AT49BV161-90CI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV161-90CI requirements.
6.How does Aetrix verify that AT49BV161-90CI is sourced from the original manufacturer or authorized distributors?
All AT49BV161-90CI 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 AT49BV161-90CI meets industry standards.
7.What is the process for return or replacement of AT49BV161-90CI?
All AT49BV161-90CI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV161-90CI, 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 AT49BV161-90CI part is unused and in its original packaging.
Return procedure for AT49BV161-90CI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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