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Microchip Technology AT49BV161T-90CI
- Part No.:
- AT49BV161T-90CI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFBGA, CSPBGA
- Datasheet:
-
AT49BV161T-90CI.pdf
- Description:
- IC FLASH 16MBIT PARALLEL 48CBGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49BV161T-90CI from Microchip Technology (formerly Atmel) is a 16-Mbit (1M × 16 / 2M × 8) 3.0V-only parallel Flash memory 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 x86-based systems requiring reliable nonvolatile program storage.
For engineers reviewing the AT49BV161T-90CI datasheet, AT49BV161T-90CI pinout, AT49BV161T-90CI application, or AT49BV161T-90CI equivalent, key selection criteria include sector lockdown capability, RDY/BUSY open-drain signaling, VPP-accelerated erase/program, suspend/resume functionality, and TSOP/CBGA package compatibility with legacy 48-pin footprint designs.
Technical Context
The AT49BV161T-90CI implements a command-register-based architecture with six-byte unlock sequences for erase and program operations, and supports both hardware (RESET) and software (Product ID Exit) recovery from failed cycles. Its internal write state machine manages autonomous timing for sector erase (300 ms max), word program (20 µs), and chip erase - all without external clocks.
It features dual voltage detection (VCC sense <1.8V inhibits programming; VPP <1.65V disables accelerated operations), noise filtering on WE/CE (<15 ns pulses ignored), and configurable status reporting via a programmable configuration register (default "00" returns to read mode automatically post-operation).
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 | 90 ns - guarantees maximum read latency under worst-case VCC = 2.65V, TA = +85°C conditions |
| Supply Voltage | 2.65V to 3.3V - single-supply operation enables direct replacement of 3.3V-only systems without level-shifting |
| Sector Architecture | 39 sectors: thirty-one 64KB + eight 8KB - enables granular firmware updates and secure boot partitioning |
| Program Time | 20 µs per word - fixed internal pulse generation eliminates need for external timing control |
| Erase Time | 300 ms per sector - internally timed; no external clock or polling overhead required |
| Standby Current | 10 µA - supports low-power hold states in battery-backed or energy-constrained embedded hosts |
| Operating Temp | -40°C to +85°C - qualified for industrial temperature range per device marking "CI" suffix |
Pinout & Package
AT49BV161T-90CI is available in 48-lead TSOP Type I (JEDEC MO-141AC) and 48-ball CBGA packages. The "CI" suffix denotes industrial temperature grade (-40°C to +85°C) and 48-pin TSOP packaging unless otherwise specified in ordering code.
| 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 interface; BYTE pin selects mode - critical for legacy 8-bit bus compatibility |
| 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 LSB) |
| CE, OE, WE | Chip Enable / Output Enable / Write Enable | Three independent controls prevent bus contention; OE/CE low + WE high = read; CE/WE low + OE high = write |
| RDY/BUSY | Open-Drain Status Output | Actively pulled low during erase/program; supports wired-OR of multiple devices on shared status line |
| VPP | Program/Erase Voltage Input | Enables accelerated operations at 5.0V ±0.5V or 12.0V ±0.5V; <0.8V disables programming entirely |
| RESET | Hardware Initialization Input | Pulsing low ≥500 ns forces return to read/standby mode and clears suspend states - essential for error recovery |
| VCCQ | Output Driver Power Supply | Separate 2.65–3.3V rail for I/O drivers; allows I/O voltage tuning independent of core VCC (e.g., 1.8V I/O with 3.0V core) |
Key Features
| Feature | Design Value |
|---|---|
| Sector Lockdown | Per-sector write protection activated via six-cycle command; prevents accidental overwrite of boot code while allowing field updates to application sectors |
| Erase/Program Suspend | 15 µs suspend latency enables concurrent read from non-erasing sectors - critical for real-time interrupt handling during firmware update |
| 128-bit Protection Register | Factory-programmed 64-bit block A + user-programmable/lockable block B - supports secure key storage and anti-cloning in trusted boot chains |
| VPP-Accelerated Operations | Reduces sector erase time by up to 5× when VPP = 5V or 12V - cuts total firmware update duration in production programming |
| Hardware Data Protection | Five-layer safeguard: VCC sense, power-on delay, control-line inhibit, noise filtering, and VPP validation - eliminates spurious writes in noisy industrial environments |
| Top/Bottom Boot Block | Configurable boot sector location (SA0–SA7 or SA31–SA38) - supports legacy BIOS-style or custom bootloader placement without PCB redesign |
Applications
| Industrial PLC Firmware Storage | Legacy x86 BIOS/UEFI Boot Code |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing deterministic 90 ns read access to initialization code during cold start; sector lockdown protects bootloader integrity. Use Value: Enables field-upgradable firmware without replacing PCBs; suspend/resume allows background diagnostics during partial reflash. |
Use Scenario: Hosting BIOS or UEFI firmware in embedded x86 platforms such as industrial PCs, medical imaging systems, and point-of-sale terminals. IC Role / Device Role / Timing Role: Primary boot ROM mapped at reset vector address; RDY/BUSY pin synchronizes CPU fetch cycles with erase/program completion. Use Value: Eliminates need for external wait-state generators; VPP acceleration reduces manufacturing flash time by >60% vs. standard 3.3V-only programming. |
| Telecom Line Card Configuration | Avionics Maintenance Data Logger |
Use Scenario: Storing configuration profiles, calibration tables, and protocol stacks in carrier-grade telecom line cards operating continuously for >10 years. IC Role / Device Role / Timing Role: Sector-erasable parameter store with individual write lockout; 10 µA standby current minimizes power draw during idle periods. Use Value: Supports over-the-air updates to specific functional modules without erasing mission-critical calibration data. |
Use Scenario: Recording flight-critical maintenance logs and sensor calibration history in certified avionics systems requiring DO-160E environmental resilience. IC Role / Device Role / Timing Role: Radiation-tolerant (non-SEL) Flash memory with hardware RESET recovery and sector lockdown for regulatory audit trail preservation. Use Value: Meets RTCA DO-178C traceability requirements via 128-bit protection register for firmware signature binding. |
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-90-4C-EKE | Same density (16Mbit), 90 ns access, but lacks RDY/BUSY pin and VPP acceleration; uses different command set (SST proprietary) | No suspend/resume support; requires software polling only - increases CPU overhead during erase/program | Select only if migrating from SST39VF family; not drop-in due to command incompatibility and missing RDY/BUSY |
| MX29LV160ETTI-90G | 16Mbit, 90 ns, top-boot configuration, but operates at 2.7–3.6V (wider range) and has no BYTE pin - fixed x16 interface | No byte-mode support; incompatible with 8-bit bus systems relying on I/O15=A-1 function | Use where x16-only interface suffices and wider VCC tolerance is needed; verify RESET timing and sector map alignment |
Compared with SST39VF1601C-90-4C-EKE and MX29LV160ETTI-90G, AT49BV161T-90CI uniquely delivers byte/word configurability, hardware RDY/BUSY signaling, and VPP-accelerated programming - making it the only option among the three supporting mixed-bus architectures and real-time suspend-aware firmware updates.
Availability
AT49BV161T-90CI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy x86 BIOS/UEFI boot code, telecom line card configuration, avionics maintenance logging, and embedded controller boot memory requiring stable component supply across extended product lifecycles.
Supply support for AT49BV161T-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 technical support, documentation, and long-term supply for the AT49BV/LV16X(T) Flash memory family.
The AT49BV161T-90CI belongs to Atmel's parallel Flash memory product line, designed specifically for embedded systems requiring in-system programmability, sector-level security, and industrial-grade reliability in space-constrained TSOP footprints.
FAQ
What does the "T" suffix in AT49BV161T-90CI signify?
The "T" in AT49BV161T-90CI indicates Top Boot Block configuration - meaning the smallest address sectors (SA0–SA7) are designated as protected boot code regions. This differs from the "B" variant (Bottom Boot), and affects how sector lockdown commands map to physical memory layout during firmware initialization.
Does AT49BV161T-90CI support both 8-bit and 16-bit data buses?
Yes, AT49BV161T-90CI supports both modes via the BYTE pin: logic high enables full 16-bit operation (I/O0–I/O15 active), while logic low configures it as an 8-bit device (I/O0–I/O7 active, I/O15 repurposed as A-1 address input). This flexibility allows reuse in legacy 8-bit microcontroller systems without bus-width conversion logic.
How does the RDY/BUSY pin function on AT49BV161T-90CI?
The RDY/BUSY pin on AT49BV161T-90CI is an open-drain output that pulls low during active erase or program cycles and releases (goes high-impedance) upon completion. It supports wired-OR connection with other Flash devices on a shared status line, enabling centralized monitoring of multi-chip programming operations without additional logic.
Can AT49BV161T-90CI be programmed using only the VCC supply, or is VPP required?
AT49BV161T-90CI can be programmed using only VCC (2.65–3.3V) - VPP is optional. When VPP is ≤ VCC, internal circuitry uses VCC for erase/program. VPP ≥ 5.0V enables accelerated operations, reducing sector erase time significantly. Leaving VPP unconnected or floating is prohibited; it must be tied to VSS or valid voltage.
What happens if a sector lockdown command is issued to AT49BV161T-90CI?
Issuing a sector lockdown command to AT49BV161T-90CI permanently disables erase and program operations for that sector until the next power cycle or RESET assertion. Once locked, the sector becomes read-only - protecting boot code from corruption during field firmware updates. Unlocking requires hardware reset; no software unlock command exists.
Is AT49BV161T-90CI compatible with the AT49BV160T-90CI pinout?
No, AT49BV161T-90CI is not pin-compatible with AT49BV160T-90CI. While both share the same 48-pin TSOP package, AT49BV161T-90CI includes the BYTE pin (pin 47) and RDY/BUSY (pin 46), whereas AT49BV160T-90CI uses those pins as NC. Direct substitution would cause undefined behavior or bus contention without PCB modification.
AT49BV161T-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)
AT49BV161T-90CI FAQ
1.How can I place an order for AT49BV161T-90CI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV161T-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 AT49BV161T-90CI reliable?
The price and inventory of AT49BV161T-90CI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV161T-90CI is usually 5 days.
3.What payment methods are accepted for AT49BV161T-90CI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV161T-90CI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV161T-90CI?
AT49BV161T-90CI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV161T-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 AT49BV161T-90CI?
For technical support, including AT49BV161T-90CI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV161T-90CI requirements.
6.How does Aetrix verify that AT49BV161T-90CI is sourced from the original manufacturer or authorized distributors?
All AT49BV161T-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 AT49BV161T-90CI meets industry standards.
7.What is the process for return or replacement of AT49BV161T-90CI?
All AT49BV161T-90CI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV161T-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 AT49BV161T-90CI part is unused and in its original packaging.
Return procedure for AT49BV161T-90CI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV161T-90CI Tags
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