MSP430F122IDW - 8MHz 16-Bit MCU, 4KB Flash | Texas Instruments
料号： MSP430F122IDW ✓ 量产中MSP430F122IDW 概述
An ultralow-power mixed-signal microcontroller combines a low-power digital processor with analog and communication peripherals on one device. The MSP430 family uses a 16-bit RISC architecture with 16-bit registers and a 125 ns instruction cycle. Its five low-power modes are designed to extend operating time in portable measurement systems where the duty cycle alternates between active sensing and low-current standby or off periods.
The MSP430F122IDW provides 4 KB of Flash for program storage and 256 bytes of SRAM for working data. Its integrated timer supports periodic timing and event handling, while the analog comparator provides a basic threshold and signal-conditioning function for sensor-oriented designs. SPI and UART peripherals enable serial connection to sensors, transceivers, data loggers, or host equipment without requiring separate interface devices.
The CPU can operate at up to 8 MHz and includes five power-saving modes. Standby wake-up can occur in less than 1 microsecond, which helps limit the response delay in duty-cycled systems. Off Mode with RAM retention is specified at 0.1 microampere, providing a low-current state for applications that must preserve volatile operating data between measurement intervals.
Typical applications include battery-powered sensors, portable data loggers, industrial measurement instruments, digital thermometers, simple UART or SPI monitoring nodes, and compact control products that require mixed-signal capability without a separate comparator or communications IC. The 22 available I/O pins also allow the device to interface with buttons, displays, indicators, transducers, and external sensors.
Designers should preserve the MSP430F122IDW package footprint and pin assignments when comparing it with alternatives, because MCU compatibility depends on more than CPU speed. Validate the power-supply limits, clock configuration, memory requirements, peripheral assignments, and active-state current against the manufacturer datasheet. Request a current quotation when lead time, stock, and project-specific sourcing quantities are required.
This product page combines the manufacturer's device information with practical guidance for low-power sensing, peripheral integration, package selection, and migration decisions. It also distinguishes verified drop-in options from parts that are merely similar in architecture, helping engineers avoid an unsafe substitution based only on clock rate, memory size, or package family.
直接替换替代料： MSP430F122IDW ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料MSP430F122IDW 最大额定值与电气特性
| CPU Architecture | 16-bit RISC |
| 最大时钟频率 | 8 MHz |
| Instruction Cycle Time | 125 ns |
| Register Width | 16-bit |
| Flash Memory | 4 KB |
| SRAM | 256 bytes |
| General-Purpose I/O Pins | 22 pins |
| Built-In Timer | 16-bit timer |
| Analog Peripheral | Comparator A |
| Serial Interfaces | SPI and UART |
| Power-Saving Modes | 5 modes |
| Standby Wake-Up Time | Less than 1 us |
| Off Mode Current With RAM Retention | 0.1 uA |
| 工作温度范围 | -40 C to +85 C |
| 封装 | 28-pin SOIC (DW) |
| Package Width | 7.50 mm |
| 安装类型 | Surface mount |
MSP430F122IDW 7.50 mm 引脚配置指南
MSP430F122IDW（7.50 mm 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： MSP430F122IDW.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MSP430F122IDW 适用于 6 应用s: Portable Environmental Sensor, Battery-Powered Data Logger, Digital Thermometer, Industrial Process Monitor, Remote Sensing Node, Compact Control Panel.
Portable Environmental Sensor
The MSP430F122IDW fits portable environmental sensors because its 8 MHz 16-bit CPU can sample and process measurements while Comparator A provides a basic analog threshold function. The controller can spend most of its time in a low-power state, with standby wake-up specified in less than 1 microsecond and off-mode RAM retention at 0.1 microampere. SPI or UART can connect the sensor to a display, local logger, or external measurement module, while the 22 I/O pins support switches, indicators, and transducers.
Battery-Powered Data Logger
For a battery-powered data logger, the MSP430F122IDW provides 4 KB of Flash for compact embedded code and 256 bytes of SRAM for working data. Its timer supports periodic sampling and record timing, while UART provides a straightforward link to a host or external memory device. Duty-cycle the processor between measurement cycles to exploit the five low-power modes. The less-than-1-microsecond standby wake-up helps preserve fast response without keeping the MCU active continuously.
Digital Thermometer
MSP430F122IDW is appropriate for a digital thermometer that combines sensor conditioning, threshold detection, and local indication. Comparator A can monitor a sensor-derived voltage against a reference threshold, while the 16-bit timer can establish measurement and update intervals. The 22 I/O pins leave sufficient interface capacity for a display, pushbuttons, alarm output, and digital sensor. Low-power operation is particularly valuable when the instrument is battery powered and measurements are taken intermittently.
Industrial Process Monitor
The MSP430F122IDW can serve as the control and communications core of a compact industrial process monitor operating from -40 C to +85 C. UART and SPI permit connection to industrial sensors, converters, or local storage, and the timer supports periodic sampling. Its mixed-signal resources reduce component count by combining a microcontroller and comparator in one package. Confirm the power-supply range, EMC requirements, isolation needs, and applicable industrial qualification before deployment.
Remote Sensing Node
A remote sensing node benefits from the MSP430F122IDW's combination of low-power modes, fast standby wake-up, UART, SPI, and 22 I/O pins. It can remain in a low-current state between telemetry intervals and then acquire a sensor reading, perform a threshold decision with Comparator A, and transmit the result. The 4 KB Flash capacity is suitable for compact firmware, although applications requiring larger buffers, protocol stacks, or encrypted connectivity should assess the memory limits carefully.
Compact Control Panel
MSP430F122IDW can implement a compact control panel with local buttons, status indicators, a serial host connection, and periodic control actions. The 22 I/O pins provide flexible connection to human-interface elements and external actuators, while the built-in 16-bit timer supports periodic scanning and timing functions. SPI and UART allow expansion without adding a dedicated communications controller. Validate actuator drive levels and isolation because the MCU pins themselves are not substitutes for power-driver circuits.
工程参考数据： MSP430F122IDW ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 |
|---|---|
| Brand | Texas Instruments |
| Package | 28-pin SOIC (DW) |
| CPU Architecture | 16-bit RISC |
| Maximum Clock Frequency | 8 MHz |
| Flash Memory | 4 KB |
| SRAM | 256 bytes |
| General-Purpose I/O | 22 pins |
| Serial Interfaces | SPI and UART |
| Analog Peripheral | Comparator A |
| Operating Temperature Range | -40 C to +85 C |
设计说明
Design the duty cycle around the MSP430F122IDW's five low-power modes. For periodic measurements, retain required RAM state, enter the lowest suitable low-power state, and use the less-than-1-microsecond standby wake-up specification when response time is important. The 0.1-microampere off-mode value applies with RAM retention, so determine whether the application can tolerate the associated wake-up and initialization sequence before selecting that mode.
Use the manufacturer's 28-pin DW footprint, pin table, and recommended land pattern without translating the package into a generic SOIC layout based only on pin count. Route sensitive comparator inputs away from UART and SPI switching nodes, provide the specified bypass capacitance at the supply pins, and keep ground returns short. Confirm the final pin assignments and exposed thermal requirements directly from the device documentation before release.
Do not treat another 8 MHz MCU with a similar memory size as a drop-in replacement. Migration requires verification of the complete pin map, voltage range, clock and reset behavior, timer resources, Comparator A characteristics, UART and SPI multiplexing, programming interface, and temperature grade. An SOIC-28 alternative with unmatched functions can require board changes even when its nominal speed and flash capacity appear suitable.
合规信息
The available product information does not explicitly state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification status. AEC-Q100 is not applicable because no automotive qualification claim was identified.
