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Microchip Technology AT49BV161-70CI
- Part No.:
- AT49BV161-70CI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFBGA, CSPBGA
- Datasheet:
-
AT49BV161-70CI.pdf
- Description:
- IC FLASH 16MBIT PARALLEL 48CBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,008
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Product details
Overview
AT49BV161-70CI from Microchip Technology (formerly Atmel) is a 16-Mbit (1M × 16 / 2M × 8) single-supply 3.0V Flash memory with 70 ns access time, sector erase architecture, 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 and firmware updates.
For engineers reviewing the AT49BV161-70CI datasheet, AT49BV161-70CI pinout, AT49BV161-70CI application, or AT49BV161-70CI equivalent, key selection considerations include sector lockdown support, VPP-accelerated program/erase, RDY/BUSY open-drain output, 128-bit protection register, and compatibility with 2.65–3.3V supply rails in industrial control and telecom baseband systems.
Technical Context
The AT49BV161-70CI implements a command-register-based Flash architecture with internal state machine control for erase, program, and suspend operations. It features dual-mode I/O (x8/x16) selected by the BYTE pin, independent 31×64KB + 8×8KB sector erase, and hardware data protection including VCC sense, noise filtering, and VPP voltage validation.
Its status reporting uses multiple mechanisms: RDY/BUSY open-drain output (active-low), Data Polling on I/O7, Toggle Bit on I/O6, and dedicated status bits on I/O5 (erase/program failure), I/O3 (VPP level), and I/O2 - all configurable via a user-settable configuration register that defaults to auto-return-to-read mode after successful operations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (1,048,576 × 16 or 2,097,152 × 8), enabling compact firmware storage for microcontrollers with limited external memory space |
| Access Time | 70 ns maximum, supporting high-speed read cycles in real-time boot and configuration loading |
| Supply Voltage | 2.65V to 3.3V (BV variant), allowing direct integration with 3.3V logic without level-shifting |
| Program Time | 20 µs per word/byte, reducing firmware update latency during field upgrades |
| Sector Erase Time | 300 ms max per sector, enabling selective reprogramming without full-chip erase overhead |
| Standby Current | 10 µA typical, minimizing power draw in sleep-mode embedded systems |
| Package Options | 48-pin TSOP Type I and 45-/48-ball CBGA, supporting both surface-mount density and thermal performance requirements |
Pinout & Package
AT49BV161-70CI is available in 48-pin TSOP Type I (JEDEC MO-142) and 45-/48-ball CBGA packages. The "-70CI" suffix denotes 70 ns speed grade and industrial temperature range (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A19 | Address Inputs | 20-bit address bus supporting full 1M-word addressing; A-1 function multiplexed 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 | Mode Select Input | Hardware-selectable interface width - eliminates software configuration overhead and ensures deterministic timing |
| CE, OE, WE | Chip, Output, Write Enable | Three independent controls prevent bus contention; CE+OE low + WE high = read; CE+WE low + OE high = write |
| RDY/BUSY | Open-Drain Status Output | Active-low signal indicating internal program/erase activity; supports wired-OR of multiple devices on shared status line |
| VPP | Write Protection & Acceleration Supply | Enables accelerated programming/erase at 5V or 12V; inhibits writes if <0.8V; must not float |
| RESET | Hardware Initialization Input | Forces high-impedance outputs and aborts ongoing operations; required to exit suspend or error states |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Architecture | 39 independently lockable sectors (31×64KB + 8×8KB) enable granular firmware partitioning - e.g., bootloader in protected bottom sectors, application in updatable top sectors |
| Erase/Program Suspend | 15 µs suspend latency allows concurrent read from non-erasing sectors - critical for real-time systems requiring background firmware updates without interrupting operation |
| 128-bit Protection Register | Factory-programmed Block A + user-programmable Block B (lockable) provides tamper-resistant device identity and secure key storage for authentication protocols |
| Hardware Data Protection | VCC sense, 15 ns noise filter on WE/CE, and VPP validation prevent accidental writes during power transients or EMI events - essential for unattended industrial deployments |
| Top/Bottom Boot Configuration | Flexible sector mapping supports either legacy top-boot (reset vector at highest address) or modern bottom-boot (vector at lowest address) architectures without hardware redesign |
Applications
| Industrial PLC Firmware Storage | Telecom Baseband Modem Code |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers operating in harsh factory environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Non-volatile boot memory providing fast 70 ns read access for cold-start execution and reliable sector-locked update zones for safe field upgrades. Use Value: Sector lockdown prevents corruption of safety-critical bootloader while allowing application code updates; 10 µA standby current extends battery-backed runtime during mains failure. | Use Scenario: Holding DSP firmware and protocol stacks in wireless baseband units deployed in outdoor cellular infrastructure cabinets. IC Role / Device Role / Timing Role: x16 Flash memory interfaced to a 16-bit microcontroller bus, using RDY/BUSY signaling to coordinate firmware patching without CPU polling overhead. Use Value: VPP-accelerated 300 ms sector erase enables sub-second over-the-air updates; CBGA package ensures thermal stability under sustained 65°C ambient conditions. |
| Medical Diagnostic Imaging Bootloader | Automotive ADAS Camera Module |
Use Scenario: Secure boot image storage in MRI and CT scanner subsystems where regulatory compliance requires immutable startup code and auditable firmware revisions. IC Role / Device Role / Timing Role: Trusted boot memory with 128-bit protection register used to store cryptographic keys and signed bootloader hashes verified at power-on reset. Use Value: Factory-block A provides unique device ID for traceability; user-lockable Block B stores revocation lists - meeting IEC 62304 Class C software lifecycle requirements. | Use Scenario: Firmware storage in surround-view camera ECUs subject to automotive AEC-Q100 Grade 2 qualification and ISO 26262 ASIL-B functional safety constraints. IC Role / Device Role / Timing Role: Industrial-grade Flash memory (–40°C to +85°C) serving as primary boot source for ARM Cortex-M7 SoC, with sector lockdown isolating safety monitor code. Use Value: Hardware RESET pin enables fail-safe recovery from corrupted programming attempts; suspend/resume avoids frame drop during concurrent image processing and firmware validation. |
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; requires SST-specific programming algorithm | No native suspend/resume; no 128-bit protection register; only top-boot configuration | Choose when migrating legacy SST39 designs or when RDY/BUSY signaling is unnecessary and cost is primary driver |
| MX29LV160ETTI-70G | 16 Mbit, 70 ns, supports CFI query, but has fixed top-boot block and no BYTE pin for x8/x16 mode switching | Lacks sector lockdown override via RESET; no VPP acceleration; different sector map (32×512KB + 2×16KB) | Prefer for systems requiring CFI-compliant drivers or where unified boot block size simplifies memory management firmware |
Compared with SST39VF1601C-70-4C-EKE and MX29LV160ETTI-70G, the AT49BV161-70CI offers unique hardware flexibility via BYTE-selectable bus width, true suspend/resume for real-time systems, and dual-block 128-bit security - making it optimal for safety-critical or field-upgradable embedded platforms demanding deterministic behavior and tamper resistance.
Availability
AT49BV161-70CI is available at Aetrix Electronics and suitable for industrial PLCs, telecom baseband modems, medical imaging subsystems, and automotive ADAS camera modules requiring stable component supply across extended product lifecycles.
Supply support for AT49BV161-70CI 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 legacy Atmel Flash products, including long-term manufacturing, documentation, and technical resources.
The AT49BV/LV16X(T) family was designed specifically for in-system programmable boot memory in resource-constrained embedded systems, emphasizing reliability, sector-level security, and seamless integration with 3.3V microcontrollers.
FAQ
What is the operating voltage range for AT49BV161-70CI?
The AT49BV161-70CI operates from 2.65V to 3.3V (BV variant). This single-supply range eliminates need for separate I/O and core voltage rails. VCCQ must be tied to VCC for 3.3V operation; the device includes VCC sense circuitry that inhibits programming if VCC drops below ~1.8V, ensuring data integrity during brown-out conditions. The AT49BV161-70CI does not support 5V operation.
How does the BYTE pin affect AT49BV161-70CI functionality?
The BYTE pin on AT49BV161-70CI determines data bus width: logic high selects x16 mode (I/O0–I/O15 active), logic low selects x8 mode (I/O0–I/O7 active, I/O15 becomes A-1 address input). Unlike AT49BV160, this pin enables hardware-selectable interface width without software configuration. In x8 mode, the AT49BV161-70CI presents 2,097,152 bytes; in x16 mode, it presents 1,048,576 words - both accessible via the same 20-bit address bus (A0–A19).
Does AT49BV161-70CI support sector lockdown, and how is it implemented?
Yes, AT49BV161-70CI supports per-sector lockdown via a six-bus-cycle command. Once enabled, a locked sector becomes read-only - its contents cannot be erased or programmed until the next power cycle or hardware RESET. Lockdown is optional and applied individually to any of the 39 sectors. The AT49BV161-70CI includes software detection: reading address 00002H within a sector returns I/O0=high if locked, I/O0=low if unlocked - enabling runtime verification before firmware updates.
What status signaling methods does AT49BV161-70CI provide for program/erase completion?
The AT49BV161-70CI provides three concurrent status methods: (1) RDY/BUSY open-drain pin (active-low), (2) Data Polling on I/O7 (complement-of-data during programming), and (3) Toggle Bit on I/O6 (toggling during operation, stops on completion). All are usable simultaneously. The AT49BV161-70CI also reports VPP level (I/O3) and erase/program success/failure (I/O5) - enabling robust error handling without polling overhead in time-critical applications.
Can AT49BV161-70CI be used in automotive applications?
The AT49BV161-70CI is rated for industrial temperature (–40°C to +85°C) and meets AEC-Q100 stress test requirements per Atmel's original qualification. While not officially certified for automotive use, its robust hardware data protection (VCC sense, noise filtering, VPP validation), sector lockdown, and suspend/resume make it suitable for ADAS camera modules and infotainment head units where extended temperature operation and field-upgrade safety are required - provided system-level qualification is performed per ISO 26262.
AT49BV161-70CI 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)
AT49BV161-70CI FAQ
1.How can I place an order for AT49BV161-70CI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV161-70CI 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 AT49BV161-70CI reliable?
The price and inventory of AT49BV161-70CI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV161-70CI is usually 5 days.
3.What payment methods are accepted for AT49BV161-70CI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV161-70CI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV161-70CI?
AT49BV161-70CI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV161-70CI 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 AT49BV161-70CI?
For technical support, including AT49BV161-70CI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV161-70CI requirements.
6.How does Aetrix verify that AT49BV161-70CI is sourced from the original manufacturer or authorized distributors?
All AT49BV161-70CI 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 AT49BV161-70CI meets industry standards.
7.What is the process for return or replacement of AT49BV161-70CI?
All AT49BV161-70CI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV161-70CI, 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 AT49BV161-70CI part is unused and in its original packaging.
Return procedure for AT49BV161-70CI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV161-70CI Tags
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