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Microchip Technology AT49BV163A-55CU
- Part No.:
- AT49BV163A-55CU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFBGA, CSPBGA
- Datasheet:
-
AT49BV163A-55CU.pdf
- Description:
- IC FLASH 16MBIT PARALLEL 48CBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,347
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Product details
Overview
AT49BV163A-55CU from Microchip Technology (formerly Atmel) is a 16-Mbit (1M × 16 / 2M × 8) single-supply 3V-only parallel Flash memory IC used for nonvolatile code and data storage in embedded systems. It features 55 ns read access time, sector erase architecture with 39 sectors (31 × 64 KB + 8 × 8 KB), and supports byte/word programming with 12 µs typical program time. It operates across 2.65–3.6 V and is commonly deployed in industrial control firmware storage where in-system reprogrammability and sector-level write protection are required.
For engineers reviewing the AT49BV163A-55CU datasheet, AT49BV163A-55CU pinout, AT49BV163A-55CU application, or AT49BV163A-55CU equivalent, key selection considerations include its TSOP-48 package, absence of VPP pin (unlike AT49BV162A), CFI-compliant interface, suspend/resume capability for concurrent read/program during erase, and 100,000 erase cycle endurance - all critical for boot code integrity and field-upgradable firmware design.
Technical Context
The AT49BV163A-55CU implements a parallel x16/x8 configurable Flash architecture with dual-mode addressing via BYTE pin control and CE/OE/WE command-driven operation. Its internal state machine executes embedded erase and program algorithms without external timing control, using READY/BUSY, Data Polling (I/O7), and Toggle Bit (I/O6) for cycle completion detection.
It integrates hardware-based protections including sector lockdown (per-sector write lock), 128-bit user-programmable protection register (with factory-block A and user-lockable block B), and hardware data protection against low-VCC or floating VPP conditions. The device powers on in read mode and requires specific six-byte command sequences to enter chip/sector erase or lockdown modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (1,048,576 × 16-bit or 2,097,152 × 8-bit) |
| Read Access Time | 55 ns - enables direct execution from flash in real-time microcontroller applications |
| Supply Voltage Range | 2.65 V to 3.6 V - compatible with 3.3 V logic systems without level shifting |
| Program Time (Word) | 12 µs - reduces firmware update latency during field upgrades |
| Sector Erase Time | 300 ms max - allows selective firmware partition updates without full chip erase |
| Erase Endurance | 100,000 cycles - supports frequent over-the-air or service-mode firmware revisions |
| Operating Temperature | –40°C to +85°C - qualified for industrial ambient environments |
Pinout & Package
AT49BV163A-55CU is housed in a 48-lead TSOP-I (Thin Small Outline Package) with 0.5 mm pitch, footprint-compatible with JEDEC MO-141AC. Pin 1 is marked by a beveled corner; the package is RoHS-compliant and green (Pb/Halide-free).
| 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/O14 | Data I/O (x16/x8) | Bi-directional data bus; I/O8–I/O14 tri-stated in byte mode |
| I/O15 / A-1 | LSB Address Input or Data I/O | Configurable: data bit in word mode; A-1 (bit -1) in byte mode for 8-bit addressing |
| BYTE | Bus Width Select | Logic high = x16 mode (I/O0–I/O15 active); logic low = x8 mode (I/O0–I/O7 active) |
| CE | Chip Enable | Active-low chip select; enables device on bus when OE and WE are valid |
| OE | Output Enable | Active-low output gate; controls data bus drivers during read operations |
| WE | Write Enable | Active-low control for write command latching and internal program/erase initiation |
| RESET | Hardware Reset | Active-low input that halts ongoing operations and forces read/standby mode on release |
| RDY/BUSY | Open-Drain Status Output | Low during internal program/erase; released high at completion; supports wired-OR multi-device monitoring |
| VPP | Not connected (NC) | Pin 14 is NC on AT49BV163A-55CU - no external voltage required for program/erase |
| GND / VCC | Power Supply | Two GND pins (pins 24, 47); single VCC (pin 33) - decoupling essential for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Erase Suspend/Resume | Allows reading or programming from non-erasing sectors while erasing another - enables real-time firmware patching without system stall |
| Sector Lockdown | Per-sector software-enabled write protection prevents accidental overwrite of boot code or calibration data |
| Common Flash Interface (CFI) | Standardized query table at fixed addresses enables automatic driver configuration and second-source compatibility |
| 128-bit Protection Register | Factory-programmed 64-bit ID + user-programmable 64-bit block (lockable) for secure firmware binding or anti-cloning |
| Hardware Data Protection | Automatic inhibition of program/erase if VCC < 1.8 V or during power-on delay - prevents corruption during brown-out |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers operating in harsh factory environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Nonvolatile parallel Flash memory providing direct XIP-capable code storage with 55 ns read access for deterministic scan-cycle timing. Use Value: Sector lockdown protects bootloader and safety-critical routines; suspend/resume allows background firmware validation while maintaining real-time I/O scanning. | Use Scenario: Holding certified boot firmware and regulatory-compliant configuration data in portable diagnostic equipment requiring traceable, tamper-resistant storage. IC Role / Device Role / Timing Role: Secure code storage IC with 128-bit protection register enabling cryptographic binding of firmware image to hardware identity. Use Value: Block B lockability ensures immutable device serial number and calibration constants; CFI support simplifies FDA audit-ready driver qualification. |
| Telecom Base Station Configuration | Automotive Infotainment Module Update |
Use Scenario: Storing radio protocol stacks and site-specific RF calibration tables in outdoor telecom nodes exposed to thermal cycling and long-term reliability demands. IC Role / Device Role / Timing Role: Field-upgradable parallel Flash memory supporting sector-erased updates of protocol modules without disrupting active call processing. Use Value: 100,000 erase cycles and –40°C to +85°C rating ensure >10-year field life; RDY/BUSY pin enables precise timing of update handshakes with baseband processors. | Use Scenario: Hosting updatable UI assets, navigation maps, and vehicle parameter tables in automotive head units subject to AEC-Q100 stress requirements. IC Role / Device Role / Timing Role: In-system programmable Flash memory interfaced to ARM Cortex-A application processors via 16-bit parallel bus. Use Value: Fast 12 µs word program time accelerates map updates over CAN/FlexRay; top/bottom boot block configuration supports dual-bank fail-safe OTA mechanisms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF1601C-55-4C-EKE | 55 ns access, 16 Mbit, x16/x8, same TSOP-48 package but includes VPP pin and lacks CFI support | No built-in CFI query mode; requires custom driver integration instead of auto-detection | Choose when legacy driver reuse is prioritized over field-upgrade flexibility |
| MX29LV160ETTI-55G | 55 ns access, 16 Mbit, x16/x8, TSOP-48, supports CFI and sector lockdown but uses different command set (Intel-style vs Atmel) | Requires firmware adaptation for command sequences and status bit interpretation | Choose for cost-sensitive designs where second-source availability outweighs migration effort |
Compared with SST39VF1601C-55-4C-EKE and MX29LV160ETTI-55G, the AT49BV163A-55CU offers unique VPP-free operation, standardized CFI implementation, and Atmel-specific suspend/resume behavior - making it optimal for new designs requiring robust in-field firmware resilience and toolchain interoperability.
Availability
AT49BV163A-55CU is available at Aetrix Electronics and suitable for industrial control firmware storage, medical device boot code retention, telecom configuration management, and automotive infotainment module updates requiring stable component supply across extended product lifecycles.
Supply support for AT49BV163A-55CU 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 the AT49BV163A-55CU. The company specializes in microcontrollers, analog, Flash memory, and security ICs for industrial, automotive, and communications markets.
The AT49BV163A-55CU belongs to Atmel's legacy parallel Flash memory product line, designed specifically for embedded systems requiring reliable, in-system reprogrammable nonvolatile storage with sector-level granularity and hardware-assisted data integrity.
FAQ
Does AT49BV163A-55CU require an external VPP voltage for programming?
No, AT49BV163A-55CU does not require an external VPP voltage. Unlike the AT49BV162A variant, the VPP pin is unconnected (NC) on AT49BV163A-55CU - all program and erase operations are performed using only the 2.65–3.6 V VCC supply. This simplifies board design by eliminating the need for a separate 12 V or 9 V programming voltage rail.
What is the difference between AT49BV163A-55CU and AT49BV162A-55CU?
The AT49BV163A-55CU omits the VPP pin (marked NC), while AT49BV162A-55CU includes a functional VPP pin for write protection. Both share identical density, timing (55 ns), sector architecture, and command sets. The AT49BV163A-55CU is intended for systems where VPP-free operation is preferred, whereas AT49BV162A-55CU supports legacy designs requiring VPP-based hardware lockout.
Can AT49BV163A-55CU be used in byte-mode (x8) and word-mode (x16) configurations?
Yes, AT49BV163A-55CU supports both configurations via the BYTE pin. When BYTE = HIGH, it operates in x16 mode with I/O0–I/O15 active; when BYTE = LOW, it operates in x8 mode with only I/O0–I/O7 active and I/O15 repurposed as A-1 (LSB address). This flexibility allows seamless integration with 8-bit or 16-bit microcontroller buses without external glue logic.
How does the sector lockdown feature work on AT49BV163A-55CU?
The sector lockdown feature on AT49BV163A-55CU is enabled per sector using a six-cycle command sequence. Once activated, a locked sector becomes permanently read-only until the next power-on or RESET cycle. Lockdown protects critical firmware such as bootloaders or calibration data from accidental overwrite during field updates - a key requirement for certified industrial and medical devices.
Is AT49BV163A-55CU supported by modern flash programming tools?
Yes, AT49BV163A-55CU is supported by industry-standard programmers including Xeltek SuperPro series, BP Microsystems universal programmers, and FlashCAT USB tools - all leveraging its CFI-compliant query table for automatic device identification and parameter detection. Its command set and status reporting are fully documented in the original Atmel datasheet 3349H.
AT49BV163A-55CU 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:
- 55 ns
- Voltage - Supply:
- 2.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-CBGA (6x8)
AT49BV163A-55CU FAQ
1.How can I place an order for AT49BV163A-55CU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV163A-55CU 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 AT49BV163A-55CU reliable?
The price and inventory of AT49BV163A-55CU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV163A-55CU is usually 5 days.
3.What payment methods are accepted for AT49BV163A-55CU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV163A-55CU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV163A-55CU?
AT49BV163A-55CU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV163A-55CU 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 AT49BV163A-55CU?
For technical support, including AT49BV163A-55CU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV163A-55CU requirements.
6.How does Aetrix verify that AT49BV163A-55CU is sourced from the original manufacturer or authorized distributors?
All AT49BV163A-55CU 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 AT49BV163A-55CU meets industry standards.
7.What is the process for return or replacement of AT49BV163A-55CU?
All AT49BV163A-55CU units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV163A-55CU, 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 AT49BV163A-55CU part is unused and in its original packaging.
Return procedure for AT49BV163A-55CU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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