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Microchip Technology AT49BV163AT-55CU
- Part No.:
- AT49BV163AT-55CU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFBGA, CSPBGA
- Datasheet:
-
AT49BV163AT-55CU.pdf
- Description:
- IC FLASH 16MBIT PARALLEL 48CBGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49BV163AT-55CU from Microchip Technology (formerly Atmel) is a 16-Mbit (1M × 16 / 2M × 8) single-supply Flash memory IC designed for embedded code storage and data logging in microcontroller-based systems. It operates at 2.65–3.6 V, delivers 55 ns read access time, supports sector erase with 31 × 64 KB + 8 × 8 KB configuration, and features suspend/resume for concurrent read/program during erase - enabling real-time firmware updates in industrial controllers.
For engineers reviewing the AT49BV163AT-55CU datasheet, AT49BV163AT-55CU pinout, AT49BV163AT-55CU application, or AT49BV163AT-55CU equivalent, key selection criteria include its TSOP-48 package, byte/word mode flexibility via BYTE pin, sector lockdown for boot code protection, CFI compliance for auto-configuration, and 100,000 erase cycles for long-life field deployment.
Technical Context
This parallel-interface NOR Flash implements a command-set architecture using CE/OE/WE control logic and supports both x8 and x16 data bus widths via the BYTE pin. Its internal write state machine handles embedded program/erase timing, eliminating external pulse generation.
The device integrates multiple status detection methods - READY/BUSY open-drain output, Data Polling on I/O7, Toggle Bit on I/O6, and dedicated status bits on I/O2–I/O7 - all configurable via a programmable status register. Sector Lockdown and 128-bit Protection Register provide hardware-enforced security for boot code and system credentials.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (1,048,576 × 16-bit or 2,097,152 × 8-bit), enabling compact firmware storage without external address multiplexing |
| Read Access Time | 55 ns max - meets timing requirements for 18 MHz bus interfaces in legacy MCU designs |
| Supply Voltage | 2.65 V to 3.6 V - compatible with 3.3 V logic domains and eliminates need for dual-voltage rails |
| Erase Architecture | 39 sectors: 31 × 64 KB + 8 × 8 KB - allows granular firmware partitioning (e.g., bootloader, app, config) |
| Program/Erase End Detection | RDY/BUSY pin + Data Polling (I/O7) + Toggle Bit (I/O6) - enables interrupt-driven or polling-based host control without fixed delays |
| Erase/Program Cycles | ≥100,000 cycles - supports field firmware updates over 10+ years in industrial telemetry applications |
| Common Flash Interface | CFI-compliant (entry via 98h @ 55h) - permits automatic driver initialization and cross-vendor flash abstraction layers |
| Security Features | Sector Lockdown (per-sector write disable) + 128-bit Protection Register (factory-block A + user-lockable block B) - prevents unauthorized firmware modification or credential extraction |
Pinout & Package
AT49BV163AT-55CU is housed in a 48-lead TSOP Type I (0.55 mm pitch) package. Unlike AT49BV162A(T), it omits the VPP pin - all program/erase operations are controlled solely by VCC and command sequences.
| 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) or I/O0–I/O7 (x8) | Bi-directional data path; I/O8–I/O14 tri-stated in byte mode; I/O15 repurposed as A-1 LSB address input |
| I/O15 / A-1 | Mode-Dependent Terminal | In word mode: data bit 15; in byte mode: least-significant address bit for 8-bit addressing extension |
| BYTE | Bus Width Select | Logic high = x16 operation (I/O0–I/O15 active); logic low = x8 operation (I/O0–I/O7 active, I/O8–I/O14 high-Z) |
| CE, OE, WE | Chip/Output/Write Enable | Three independent controls prevent bus contention; OE/CE low + WE high = read; CE/WE low + OE high = write |
| RESET | Hardware Initialization | Pulsing low ≥500 ns forces return to read/standby mode and clears pending suspend states |
| RDY/BUSY | Open-Drain Status Output | Active-low indicates ongoing program/erase; supports wired-OR of multiple devices on shared status line |
| NC | No Connect | Two pins (Pin 12 and Pin 15 in TSOP top view) are unconnected - must be left floating or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Erase Suspend/Resume | Interrupts sector erase to read/program other sectors - enables live firmware patching without halting system operation |
| Program Suspend/Resume | Pauses active word programming to read any non-target sector - supports diagnostic access during update sequences |
| Sector Lockdown | Per-sector write-disable via six-cycle command - protects bootloader or calibration data from accidental overwrite |
| 128-bit Protection Register | Factory-programmed 64-bit ID + user-writable/lockable 64-bit block - stores cryptographic keys or device-specific secrets with hardware enforcement |
| Single-Pulse Program Mode | After six-byte entry sequence, single WE pulse writes data - reduces host CPU overhead during high-volume programming |
| Hardware Data Protection | VCC sense (<1.8 V inhibits write), power-on delay (10 ms), and control-line gating (OE low/CE high/WE high blocks programming) - prevents spurious writes during power transients |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Protection |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments with ambient temperatures up to 85°C. IC Role / Device Role / Timing Role: Non-volatile code storage with fast random-access reads and sector-erased field updates; 55 ns access ensures deterministic scan-cycle timing in real-time control loops. Use Value: Sector Lockdown prevents corruption of safety-critical bootloader during application firmware upgrades; 100,000 erase cycles support >10 years of scheduled maintenance cycles. | Use Scenario: Securing boot code and regulatory-compliant calibration data in portable diagnostic equipment requiring FDA 21 CFR Part 11 audit trails. IC Role / Device Role / Timing Role: Trusted execution root-of-trust element; 128-bit Protection Register stores device-unique keys used to sign firmware integrity checks at power-up. Use Value: Hardware-enforced lockdown prevents tampering with certified bootloader; CFI interface enables automated driver validation during production test. |
| Automotive Body Control Module | Telecom Remote Node Configuration |
Use Scenario: Holding vehicle-specific configuration tables (e.g., door lock logic, lighting profiles) in body control units operating across -40°C to +105°C automotive temperature range. IC Role / Device Role / Timing Role: Parameter storage with byte-mode access for efficient EEPROM-like updates; RDY/BUSY pin synchronizes writes with CAN bus idle periods. Use Value: Fast 12 µs word program time minimizes bus occupancy during over-the-air (OTA) updates; green Pb/Halide-free packaging meets AEC-Q100 material requirements. | Use Scenario: Storing protocol stacks and site-specific RF calibration data in cellular base station remote radio heads exposed to wide thermal cycling. IC Role / Device Role / Timing Role: Field-upgradable firmware repository with suspend/resume capability - allows background sector erase while serving live traffic data. Use Value: Erase Suspend enables zero-downtime firmware migration; TSOP-48 package supports high-density PCB layouts in space-constrained RF modules. |
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, 3.0–3.6 V supply, but lacks CFI support and has no sector lockdown feature | Requires custom driver development; unsuitable for secure boot applications requiring hardware write protection | Select only when CFI auto-detection and sector-level security are not required; verify RESET timing compatibility |
| MX29LV160ETTI-55G | 55 ns access, 16 Mbit, 2.7–3.6 V, includes CFI and boot-block configuration, but no 128-bit protection register | Supports standard bootloader partitioning but cannot store cryptographically bound device identities | Preferred for cost-sensitive designs needing CFI and top/bottom boot blocks; add external security IC if key storage is mandatory |
Compared with SST39VF1601C-55-4C-EKE and MX29LV160ETTI-55G, AT49BV163AT-55CU uniquely combines CFI compliance, per-sector lockdown, and factory-programmed 128-bit identity - making it the only option among the three qualified for secure, field-upgradable embedded systems requiring traceable firmware integrity.
Availability
AT49BV163AT-55CU is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics equipment, automotive body control modules, and telecom remote nodes requiring stable component supply across extended product lifecycles.
Supply support for AT49BV163AT-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 technical and manufacturing continuity for legacy Atmel Flash products including the AT49BV series.
The AT49BV163AT-55CU belongs to Atmel's parallel NOR Flash memory family, engineered for reliable in-system programmability in resource-constrained embedded systems where deterministic timing, sector-level security, and long-term data retention are critical.
FAQ
What is the maximum operating voltage for AT49BV163AT-55CU?
The AT49BV163AT-55CU operates within a strict 2.65 V to 3.6 V supply range. Operation above 3.6 V risks permanent damage, while voltages below 2.65 V may cause unreliable read/write behavior or failure to enter command modes. The device includes VCC sense circuitry that inhibits programming if VCC drops below ~1.8 V, ensuring data integrity during brown-out conditions. This specification is validated per the 3349H–FLASH–3/05 datasheet revision.
Does AT49BV163AT-55CU support both x8 and x16 data bus configurations?
Yes, AT49BV163AT-55CU supports both configurations via the BYTE pin: logic high enables x16 mode (I/O0–I/O15 active), logic low enables x8 mode (I/O0–I/O7 active, I/O8–I/O14 tri-stated, I/O15 repurposed as A-1 address input). This flexibility allows seamless integration with 8-bit microcontrollers or 16-bit DSPs without external glue logic. The mode is latched at power-up or reset and remains static until the next reset cycle.
How does sector lockdown work on AT49BV163AT-55CU?
Sector lockdown on AT49BV163AT-55CU is enabled per sector using a six-cycle command sequence targeting the sector address. Once locked, the sector becomes read-only - program and erase commands to that sector are ignored, and the I/O5 status bit asserts high to indicate failure. Lockdown persists across power cycles and is only cleared by hardware reset or power-on reset. This mechanism protects bootloader code from accidental overwrite during field firmware updates.
Is the VPP pin present on AT49BV163AT-55CU?
No, the VPP pin is absent on AT49BV163AT-55CU - it is only present on the AT49BV162A(T) variant. All program and erase functions on AT49BV163AT-55CU rely solely on VCC (2.65–3.6 V) and command sequences; no external high-voltage supply is required. This simplifies board design and eliminates VPP-related layout constraints or voltage translation circuitry.
What status detection methods does AT49BV163AT-55CU provide for program/erase completion?
AT49BV163AT-55CU offers three concurrent status detection methods: (1) RDY/BUSY pin (open-drain, active-low), (2) Data Polling on I/O7 (returns complemented data during programming, true data upon completion), and (3) Toggle Bit on I/O6 (toggles between 0/1 during operation, stabilizes upon completion). These can be used independently or in combination per the algorithms in Figures 4-1 through 4-4 of the datasheet to ensure robust end-of-operation detection in noise-prone environments.
AT49BV163AT-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)
AT49BV163AT-55CU FAQ
1.How can I place an order for AT49BV163AT-55CU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV163AT-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 AT49BV163AT-55CU reliable?
The price and inventory of AT49BV163AT-55CU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV163AT-55CU is usually 5 days.
3.What payment methods are accepted for AT49BV163AT-55CU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV163AT-55CU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV163AT-55CU?
AT49BV163AT-55CU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV163AT-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 AT49BV163AT-55CU?
For technical support, including AT49BV163AT-55CU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV163AT-55CU requirements.
6.How does Aetrix verify that AT49BV163AT-55CU is sourced from the original manufacturer or authorized distributors?
All AT49BV163AT-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 AT49BV163AT-55CU meets industry standards.
7.What is the process for return or replacement of AT49BV163AT-55CU?
All AT49BV163AT-55CU units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV163AT-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 AT49BV163AT-55CU part is unused and in its original packaging.
Return procedure for AT49BV163AT-55CU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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