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Texas Instruments MSP430F46181IPZ
- Part No.:
- MSP430F46181IPZ
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
MSP430F46181IPZ.pdf
- Description:
- IC MCU 16BIT 116KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,908
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Product details
Overview
MSP430F46181IPZ from Texas Instruments is an ultralow-power 16-bit mixed-signal microcontroller featuring 116KB+256B flash/ROM, 8KB RAM, integrated 160-segment LCD driver with regulated charge pump, dual 16-bit timers (Timer_A3 and Timer_B7), USCI_A0 (UART/IrDA/SPI), USCI_B0 (SPI/I²C), USART1 (UART/SPI), three-channel DMA, and comparator_A. It operates from 1.8 V to 3.6 V and targets portable medical devices and e-metering applications.
For engineers reviewing the MSP430F46181IPZ datasheet, MSP430F46181IPZ pinout, MSP430F46181IPZ application, or MSP430F46181IPZ equivalent, key selection criteria include its 100-pin TQFP package, absence of ADC12 module (distinguishing it from non-"1" variants), LCD segment drive capability up to 160 segments, and support for real-time clock via basic timer - all critical for battery-powered metering and display-centric embedded systems.
Technical Context
The MSP430F46181IPZ implements the MSP430x461x1 family architecture, omitting the ADC12 module while retaining full peripheral complement: two 16-bit timers with capture/compare functionality, USCI_A0 and USCI_B0 for multi-protocol serial communication, USART1 for legacy UART/SPI, and hardware multiplier. Its FLL+ system enables sub-6 µs wake-up from standby mode using SMCLK derived from DCO or external crystals.
It supports dual supply domains (DVCC1/DVCC2 and AVCC) with independent analog/digital ground pins (AVSS, DVSS1/DVSS2), enabling precise noise isolation for comparator_A and LCD charge pump operation. The LCD_A module drives up to 160 segments with 1–4 multiplexing and includes internal voltage regulation via LCDCAP/R33 capacitor connection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPUX with 16 registers and constant generators; enables single-cycle register operations and high code efficiency in ultra-low-power firmware. |
| Memory | 116KB+256B flash/ROM + 8KB RAM; sufficient for complex metering algorithms, secure bootloader, and persistent data logging without external memory. |
| Supply Voltage | 1.8 V to 3.6 V; compatible with single-cell Li-ion, Li-polymer, or dual alkaline batteries without regulation overhead. |
| Power Modes | Five low-power modes including Off mode (0.22 µA RAM retention); extends battery life in intermittent-readout applications like utility meters. |
| LCD Driver | Integrated LCD_A supporting up to 160 segments with regulated charge pump; eliminates need for external LCD bias IC in portable displays. |
| Timers | Timer_A3 (3 capture/compare registers) + Timer_B7 (7 shadowed capture/compare registers); enables simultaneous PWM generation, input capture, and real-time clock functions. |
| Serial Interfaces | USCI_A0 (UART/IrDA/SPI), USCI_B0 (SPI/I²C), USART1 (UART/SPI); provides flexible connectivity for sensor interfaces, IR remote control, and host MCU communication. |
Pinout & Package
Package: 100-pin TQFP (PZ), 14 mm × 14 mm, 0.5 mm pitch. Pinout validated per TI SLAS675 (MSP430x461x1 Terminal Functions, pages 10–12).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST/NMI | Reset / Nonmaskable Interrupt input | Active-low reset initiation and high-priority interrupt source; essential for fail-safe recovery in metering applications. |
| P1.0/TA0 | Timer_A0 capture/compare / BSL transmit | Primary UART TX for bootload communication; also serves as general-purpose I/O or timer output in application firmware. |
| P1.1/TA0/MCLK | Timer_A0 capture / MCLK output | Provides main system clock output for debug or external synchronization; TA0 input only on this pin per datasheet note. |
| P7.0/UCA0STE/S33 | USCI_A0 slave transmit enable / LCD segment 33 | Enables SPI slave mode for peripheral daisy-chaining; doubles as LCD segment driver in display-enabled configurations. |
| COM0–COM3 | LCD backplane outputs | Four dedicated common outputs supporting 1–4 multiplex LCDs; required for driving segmented displays in e-meters and medical handhelds. |
| LCDCAP/R33 | LCD charge pump capacitor terminal | Connects external capacitor to generate regulated VLCD voltage; enables stable contrast across battery voltage range without external DC-DC. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow-power operation | 0.22 µA in Off mode with RAM retention enables >10-year battery life in sealed utility meters using CR2032 or AA cells. |
| Integrated LCD driver | Drives 160 segments with internal charge pump and programmable bias; reduces BOM count and PCB area versus discrete LCD solutions. |
| Dual USCI modules | USCI_A0 and USCI_B0 support concurrent UART, IrDA, SPI, and I²C - ideal for interfacing with optical sensors, EEPROMs, and IR transceivers. |
| Real-time clock capability | Basic Timer with calendar mode provides accurate timekeeping without external RTC IC; critical for tariff-based energy metering. |
| Hardware multiplier | MPY/MPYS/MAC/MACS instructions accelerate math-intensive tasks like RMS calculation, harmonic analysis, and encryption in meter firmware. |
Applications
| Smart Electricity Meter | Portable Medical Glucometer |
|---|---|
Use Scenario: Utility-grade electricity meter measuring active/reactive power, storing consumption logs, and displaying real-time usage on segmented LCD. IC Role / Device Role / Timing Role: Primary controller executing metrology algorithms, managing LCD refresh, handling IR/RS-485 communication, and maintaining time via basic timer RTC. Use Value: Integrated LCD driver and ultralow standby current eliminate external bias IC and extend battery backup to >10 years during power outages. | Use Scenario: Handheld blood glucose monitor with LCD display, button interface, USB/IR data upload, and precision analog front-end for test strip reading. IC Role / Device Role / Timing Role: System-on-chip managing analog acquisition (via comparator_A), LCD rendering, button debouncing, and secure data transmission via USCI_A0 IrDA. Use Value: Single-chip solution reduces size/cost vs. MCU + display driver + comms IC; 1.8 V operation enables direct use of coin-cell batteries. |
| Industrial Flow Meter Display | Wireless Sensor Node Gateway |
Use Scenario: Local display unit for magnetic flow meters showing flow rate, totalized volume, and alarm status in hazardous environments with limited power budget. IC Role / Device Role / Timing Role: Dedicated display controller receiving Modbus RTU data over USART1, formatting values, and driving 128-segment LCD with adjustable contrast. Use Value: Regulated LCD charge pump maintains consistent segment brightness across 1.8–3.6 V supply range, eliminating contrast drift during battery discharge. | Use Scenario: Battery-powered gateway aggregating data from multiple I²C temperature/humidity sensors and relaying via UART to LoRaWAN module. IC Role / Device Role / Timing Role: Protocol bridge with USCI_B0 (I²C master) and USART1 (UART to radio), performing data buffering and low-power scheduling via five power modes. Use Value: Three-channel DMA offloads sensor readouts from CPU, reducing active time and extending node lifetime beyond 5 years on 2xAA batteries. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F4618IPZ | Includes ADC12 module (12-bit, 12-channel); otherwise identical memory, timers, and peripherals. | Required when analog sensor signal conditioning (e.g., shunt-based current measurement) is needed on-chip. | Select MSP430F4618IPZ only if ADC12 functionality is mandatory; MSP430F46181IPZ offers lower cost and same LCD/timing/comm features without ADC overhead. |
| MSP430F5438AIPZ | Higher performance (25 MHz max, 24KB RAM), integrated USB, but no LCD_A driver or regulated charge pump. | Suitable for USB-connected gateways or data loggers where display is external or omitted. | Choose MSP430F5438AIPZ for USB host/device capability and larger RAM; avoid when integrated LCD driving is required. |
Compared with MSP430F4618IPZ, the MSP430F46181IPZ removes ADC12 to reduce cost and power while preserving full LCD, timer, and communication capabilities - making it optimal for display-dominant, analog-light metering. Versus MSP430F5438AIPZ, it trades USB for integrated LCD support, targeting cost-sensitive, battery-operated display terminals.
Availability
MSP430F46181IPZ is available at Aetrix Electronics and suitable for smart electricity metering, portable medical diagnostics, industrial flow display units, and wireless sensor node gateways requiring stable component supply and long-term production continuity.
Supply support for MSP430F46181IPZ 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and digital signal technologies with decades of microcontroller innovation.
The MSP430x461x1 product line was designed specifically for ultralow-power, LCD-integrated applications in utility metering, portable healthcare, and industrial human-machine interfaces - emphasizing extended battery life, integrated display control, and robust mixed-signal integration.
FAQ
What distinguishes MSP430F46181IPZ from MSP430F4618IPZ?
The MSP430F46181IPZ omits the ADC12 module present in MSP430F4618IPZ, while retaining identical flash (116KB+256B), RAM (8KB), timers, USCI peripherals, LCD driver, and package. This makes MSP430F46181IPZ ideal for display-centric applications where external ADCs or comparator-based sensing suffices, reducing cost and power consumption without sacrificing core functionality.
Does MSP430F46181IPZ support real-time clock functionality?
Yes, MSP430F46181IPZ supports real-time clock (RTC) functionality through its Basic Timer module, which can be configured in calendar mode with alarms and interrupts. It uses ACLK (typically sourced from XT1 crystal or VLO) for accurate timekeeping, enabling timestamping and tariff scheduling in e-meter applications without external RTC ICs.
Can MSP430F46181IPZ drive a 4-mux LCD display?
Yes, MSP430F46181IPZ's LCD_A module supports 1-, 2-, 3-, and 4-mux configurations for up to 160 segments. With COM0–COM3 outputs and segment pins S0–S39 plus R03–R33, it natively drives 4-backplane displays - essential for high-information-content meter displays requiring compact digit/character rendering.
What serial communication interfaces are available on MSP430F46181IPZ?
MSP430F46181IPZ integrates USCI_A0 (supporting UART, IrDA, SPI), USCI_B0 (supporting SPI and I²C), and USART1 (supporting UART and SPI). These provide concurrent multi-protocol connectivity - for example, I²C to sensors, UART to radio, and IrDA to handheld readers - all managed independently via dedicated control registers.
Is the LCD charge pump in MSP430F46181IPZ regulated?
Yes, MSP430F46181IPZ features a regulated LCD charge pump controlled by the LCDCPEN bit. When enabled, it generates a stable VLCD voltage from DVCC, allowing consistent contrast across the full 1.8–3.6 V supply range. External capacitor LCDCAP/R33 sets output voltage level, and segments S0–S3 are disabled during charge pump operation per datasheet specification.
MSP430F46181IPZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- MSP430x4xx
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPUX
- Core Size:
- 16-Bit
- Speed:
- 8MHz
- Connectivity:
- I2C, IrDA, SCI, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT
- Number of I/O:
- 80
- Program Memory Size:
- 116KB (116K x 8 + 256B)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430F46181IPZ FAQ
1.How can I place an order for MSP430F46181IPZ through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F46181IPZ 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 MSP430F46181IPZ reliable?
The price and inventory of MSP430F46181IPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F46181IPZ is usually 5 days.
3.What payment methods are accepted for MSP430F46181IPZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F46181IPZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F46181IPZ?
MSP430F46181IPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F46181IPZ 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 MSP430F46181IPZ?
For technical support, including MSP430F46181IPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F46181IPZ requirements.
6.How does Aetrix verify that MSP430F46181IPZ is sourced from the original manufacturer or authorized distributors?
All MSP430F46181IPZ 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 MSP430F46181IPZ meets industry standards.
7.What is the process for return or replacement of MSP430F46181IPZ?
All MSP430F46181IPZ units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F46181IPZ, 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 MSP430F46181IPZ part is unused and in its original packaging.
Return procedure for MSP430F46181IPZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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