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Microchip Technology AT49BV161T-70CI
- Part No.:
- AT49BV161T-70CI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFBGA, CSPBGA
- Datasheet:
-
AT49BV161T-70CI.pdf
- Description:
- IC FLASH 16MBIT PARALLEL 48CBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,895
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Product details
Overview
AT49BV161T-70CI 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 where low-voltage operation and sector-level write protection are required.
For engineers reviewing the AT49BV161T-70CI datasheet, AT49BV161T-70CI pinout, AT49BV161T-70CI application, or AT49BV161T-70CI equivalent, key selection considerations include its dual-mode BYTE-selectable interface, RDY/BUSY open-drain output, VPP-accelerated program/erase, suspend/resume capability, and 128-bit protection register for secure boot code storage.
Technical Context
The AT49BV161T-70CI implements a command-register-based Flash architecture with internal state machine control for erase, program, and suspend operations. It supports both x8 and x16 data widths via the BYTE pin, uses A-1 addressing in byte mode, and features dedicated status bits (I/O3, I/O5, I/O6, I/O7) plus RDY/BUSY for real-time operation monitoring.
Its sector architecture comprises 39 independently erasable sectors - thirty-one 64KB (32K-word) and eight 8KB (4K-word) blocks - with per-sector lockdown, hardware data protection (VCC sense, noise filtering), and configurable status register (00/01) governing automatic read-mode return after successful operations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (1,048,576 × 16 or 2,097,152 × 8) |
| Access Time | 70 ns - guarantees maximum read latency under worst-case VCC = 2.65V, TA = +85°C |
| Supply Voltage | 2.65V to 3.3V - single supply enables direct connection to 3.3V logic without level shifting |
| Program Time | 20 µs per word - fixed internal timing eliminates external timing circuitry |
| Sector Erase Time | 300 ms max per sector - deterministic erase duration simplifies system timeout design |
| Standby Current | 10 µA - ultra-low quiescent draw supports battery-backed or always-on firmware storage |
| Operating Temp | -40°C to +85°C - industrial-grade thermal range suitable for embedded control environments |
Pinout & Package
AT49BV161T-70CI is available in 48-pin TSOP Type I (JEDEC MO-142) and 48-ball CBGA (10 mm × 12 mm) packages. Pin functions are identical across both packages except for physical layout; the device uses common address/data multiplexing and dedicated control signals including RDY/BUSY (open-drain) and VPP for accelerated programming.
| 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 data width: BYTE=1 → x16; BYTE=0 → x8 with I/O15 repurposed as LSB address |
| CE, OE, WE | Chip/Output/Write Enable | Three independent controls prevent bus contention; standard microprocessor timing compatible |
| RDY/BUSY | Open-Drain Status Output | Active-low during internal program/erase; supports wired-OR of multiple devices on shared status line |
| VPP | Program/Erase Power Input | Enables accelerated programming at 5V or 12V; inhibits writes if < 0.8V; selects VCC if within ±0.3V of VCC |
| RESET | Hardware Initialization | Forces high-impedance outputs and resets internal state; required to exit suspend or error states |
| BYTE | Mode Select | Determines x8/x16 operation; critical for compatibility with 8-bit vs 16-bit host buses |
| VCCQ | Output Driver Supply | Separate 2.65–3.6V supply for I/O drivers; allows mixed-voltage interfacing when VCCQ ≠ VCC |
Key Features
| Feature | Design Value |
|---|---|
| Erase/Program Suspend & Resume | Allows concurrent read from non-erasing sector while erasing another - essential for real-time firmware updates without halting system execution |
| Sector Lockdown | Per-sector write-protection prevents accidental overwrite of boot code; lockdown persists until power cycle or reset |
| 128-bit Protection Register | Factory-programmed Block A + user-programmable Block B (lockable) - enables secure key storage and anti-cloning mechanisms |
| VPP-Accelerated Programming | Reduces program/erase times by applying 5V or 12V to VPP - cuts typical erase time from seconds to sub-second range |
| Hardware Data Protection | Five-layer safeguard: VCC sense, power-on delay, control-line inhibit, noise filter, and VPP threshold enforcement - prevents spurious writes during brown-out or EMI events |
Applications
| BIOS/UEFI Firmware Storage | Industrial PLC Program Memory |
|---|---|
Use Scenario: Storing boot firmware in x86 server motherboards requiring field-upgradable BIOS images with secure boot validation. IC Role / Device Role / Timing Role: Nonvolatile program storage with sector-lockdown protecting primary boot block and RDY/BUSY signaling for safe flash update sequencing. Use Value: Enables atomic firmware updates using suspend/resume to maintain system responsiveness during flash reprogramming. | Use Scenario: Retaining ladder logic programs and configuration data in programmable logic controllers deployed in factory automation systems. IC Role / Device Role / Timing Role: Reliable, long-retention data storage with 10 µA standby current minimizing energy use in battery-backed operation. Use Value: Sector erase architecture allows selective update of HMI graphics or motion control parameters without disturbing core runtime code. |
| Medical Device Bootloader Storage | Automotive Infotainment Firmware |
Use Scenario: Hosting certified bootloader code in Class II medical equipment where regulatory compliance mandates immutable boot integrity. IC Role / Device Role / Timing Role: Secure boot storage leveraging 128-bit protection register (Block A factory ID + Block B locked user key) and hardware lockdown. Use Value: Prevents unauthorized firmware modification through cryptographic binding between hardware identity and signed image verification. | Use Scenario: Storing navigation map data and UI assets in automotive head units requiring over-the-air (OTA) incremental updates. IC Role / Device Role / Timing Role: High-reliability Flash memory with 70 ns access time supporting fast GUI rendering and VPP-accelerated partial sector rewrites. Use Value: Fast 20 µs word programming and 300 ms sector erase enable rapid OTA patch deployment without extended vehicle downtime. |
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 | Same density (16 Mbit), 70 ns access, but uses different command set and lacks RDY/BUSY pin; no VPP acceleration | No suspend/resume; no 128-bit protection register; requires software polling only | Choose when legacy SST39 command compatibility is required and VPP acceleration is unnecessary |
| MX29LV160DBTI-70G | 16 Mbit, 70 ns, top-boot configuration; includes CFI query support but no BYTE pin - fixed x16 interface | No byte-mode flexibility; lacks sector lockdown and 128-bit register; different sector map (32 × 64KB + 2 × 8KB) | Prefer for designs already committed to Common Flash Interface (CFI) toolchains and requiring top-boot default behavior |
Compared with SST39VF1601C-70-4C-EKE and MX29LV160DBTI-70G, the AT49BV161T-70CI uniquely combines BYTE-selectable interface, hardware suspend/resume, RDY/BUSY signaling, and factory/user protection registers - making it optimal for secure, real-time updatable embedded systems where interface flexibility and robustness are critical.
Availability
AT49BV161T-70CI is available at Aetrix Electronics and suitable for BIOS firmware storage, industrial PLC program retention, medical bootloader security, and automotive infotainment OTA updates requiring stable component supply across multi-year production cycles.
Supply support for AT49BV161T-70CI 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 legacy AT49BV/LV Flash portfolio, providing long-term documentation, programming tools, and reliability data.
The AT49BV161T-70CI belongs to Atmel's BV-series 3.0V Flash memory product line, designed specifically for in-system programmable, low-power, secure firmware storage in space-constrained industrial and computing applications.
FAQ
What is the difference between AT49BV161T-70CI and AT49BV161-70CI?
The "T" suffix in AT49BV161T-70CI denotes top-boot block configuration - meaning the lowest-addressed sectors (SA0–SA7) are designated as boot blocks. This differs from the bottom-boot AT49BV161-70CI, where highest-addressed sectors serve as boot blocks. Both share identical electrical specs, pinout, and timing (70 ns), but boot sector mapping affects firmware initialization sequence and security partitioning. The AT49BV161T-70CI is commonly used in x86-compatible platforms requiring top-boot BIOS compatibility.
Does AT49BV161T-70CI support true x8 mode with separate I/O pins?
No. AT49BV161T-70CI does not have dedicated x8-only pins. In byte mode (BYTE = 0), it operates in x8 configuration using I/O0–I/O7 for data, while I/O8–I/O14 tri-state and I/O15 functions as A-1 (LSB address). This multiplexed approach shares physical pins between data and addressing - eliminating need for extra pins but requiring host-side handling of A-1 during byte accesses. The AT49BV161T-70CI retains full x16 capability when BYTE = 1.
How does the RDY/BUSY pin on AT49BV161T-70CI improve system design versus polling-only alternatives?
The RDY/BUSY pin on AT49BV161T-70CI provides active-low, open-drain status signaling that eliminates CPU polling overhead during program/erase cycles. Unlike pure software polling (e.g., Data Polling on I/O7), RDY/BUSY allows interrupt-driven operation and wired-OR connection of multiple AT49BV161T-70CI devices on a shared status line - simplifying multi-flash systems in servers or storage controllers. Its deterministic timing (≤15 µs suspend latency) ensures predictable real-time response, critical for safety-critical firmware updates.
Can the 128-bit protection register in AT49BV161T-70CI be used for cryptographic key storage?
Yes - the AT49BV161T-70CI's 128-bit protection register contains two 64-bit blocks: factory-programmed Block A (immutable, unique serial) and user-programmable Block B (lockable). Once Block B is locked via the Lock Protection Register command, its contents become read-only and tamper-resistant. This enables secure storage of symmetric keys, device certificates, or hash seeds - provided the host system implements proper authentication before lock activation. Block A's uniqueness supports device binding in secure boot chains.
What happens if VPP is left unconnected on AT49BV161T-70CI?
VPP must never be left floating on AT49BV161T-70CI. Per datasheet Rev. 1427L, an unconnected VPP may float to indeterminate voltage, causing unpredictable program/erase behavior or permanent inhibition of write operations. The recommended practice is to tie VPP to VCC (for standard-speed operation) or to a regulated 5.0V ±0.5V source (for accelerated programming). If VPP is unused, it must be actively driven to a valid logic level - either VCC or ground - not left open. Failure to do so risks failed firmware updates or corrupted memory contents.
AT49BV161T-70CI 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:
- 70 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-70CI FAQ
1.How can I place an order for AT49BV161T-70CI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV161T-70CI 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-70CI reliable?
The price and inventory of AT49BV161T-70CI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV161T-70CI is usually 5 days.
3.What payment methods are accepted for AT49BV161T-70CI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV161T-70CI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV161T-70CI?
AT49BV161T-70CI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV161T-70CI 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-70CI?
For technical support, including AT49BV161T-70CI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV161T-70CI requirements.
6.How does Aetrix verify that AT49BV161T-70CI is sourced from the original manufacturer or authorized distributors?
All AT49BV161T-70CI 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-70CI meets industry standards.
7.What is the process for return or replacement of AT49BV161T-70CI?
All AT49BV161T-70CI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV161T-70CI, 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-70CI part is unused and in its original packaging.
Return procedure for AT49BV161T-70CI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV161T-70CI Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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