Texas Instruments MSP430G2352IPW20R

Overview

MSP430G2352IPW20R from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller featuring a 10-bit 200-ksps ADC, Universal Serial Interface (SPI/I²C), one 16-bit Timer_A with three capture/compare registers, and up to 8 capacitive-touch-enabled I/O pins. It operates from 1.8 V to 3.6 V and targets battery-powered sensor nodes and portable measurement systems.

For engineers reviewing the MSP430G2352IPW20R datasheet, MSP430G2352IPW20R pinout, MSP430G2352IPW20R application, or MSP430G2352IPW20R equivalent, key selection criteria include ADC10 channel count, USI interface support, TSSOP-20 package compatibility, low-power mode timing (e.g., <1 µs wake-up), and Spy-Bi-Wire debug capability.

Technical Context

The MSP430G2352IPW20R implements a 16-bit RISC CPU with 62.5-ns instruction cycle time and integrates a digitally controlled oscillator (DCO) calibrated to 1 MHz, 8 MHz, 12 MHz, and 16 MHz. Its clock system supports ACLK (LF oscillator or 32-kHz crystal), SMCLK (DCO-derived), and MCLK (system clock).

It includes a comparator with eight input channels, brownout detection, five power-saving modes (LPM0–LPM4), and on-chip emulation logic via Spy-Bi-Wire. The ADC10 module features internal reference, sample-and-hold, autoscan, and DMA-capable data transfer - all confirmed for the G2x52 series and active on this TSSOP-20 variant.

Key Specifications

Pinout & Package

Package: 20-pin TSSOP (PW), 0.65 mm pitch, body size 6.5 × 4.4 mm, thermal pad optional. Pinout validated per TI SLAS722G Rev. May 2013, Table 2 and PW-package top-view diagram.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power mixed-signal microcontroller applications.

Compared with MSP430G2452IPW20R, the MSP430G2352IPW20R offers identical package and core peripherals but reduced ADC channel count - lowering cost where 4 analog inputs suffice. Versus MSP430FR2355IPW20R, it trades FRAM durability and speed for proven Flash reliability and simpler migration from legacy MSP430G2x designs.

Availability

MSP430G2352IPW20R is available at Aetrix Electronics and suitable for environmental sensing, smart metering interfaces, capacitive touch remotes, and industrial control panels requiring stable component supply and long-term manufacturability.

Supply support for MSP430G2352IPW20R 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 connectivity technologies with over 50 years of innovation in low-power design.

The MSP430G2xx family was engineered for ultra-low-power portable measurement and sensing applications - prioritizing sub-µA standby, fast wake-up, and integrated analog peripherals to minimize external components.

FAQ

What is the maximum ADC sampling rate supported by the MSP430G2352IPW20R?

The MSP430G2352IPW20R supports a maximum ADC10 sampling rate of 200 kS/s, achievable with internal reference and optimized clock configuration. This rate is specified under typical conditions (VCC = 2.2 V, TA = 25°C) and enables high-fidelity signal capture for vibration monitoring or audio preprocessing. The MSP430G2352IPW20R ADC includes sample-and-hold and autoscan functionality to sustain this throughput across multiple channels without CPU intervention.

Does the MSP430G2352IPW20R support hardware UART communication?

No, the MSP430G2352IPW20R does not include a dedicated UART peripheral. It features a Universal Serial Interface (USI) that supports SPI and I²C protocols only. UART functionality must be implemented in software using Timer_A and GPIO - a common practice in ultra-low-power designs where asynchronous serial is infrequent. The MSP430G2352IPW20R USI does not provide start/stop bit generation or baud-rate auto-detection required for native UART.

What debug interface does the MSP430G2352IPW20R use, and how many pins are required?

The MSP430G2352IPW20R uses the Spy-Bi-Wire (SBW) interface, a 2-wire subset of JTAG that requires only two pins: RST/NMI/SBWTDIO (Pin 16) and TEST/SBWTCK (Pin 17). This minimizes debug footprint while maintaining full flash programming, breakpoint, and register inspection capability. The MSP430G2352IPW20R does not support standard 4-wire JTAG; SBW is the sole production-debug interface defined in its silicon.

Can the MSP430G2352IPW20R operate from a 1.8 V supply while running at 16 MHz?

No, the MSP430G2352IPW20R cannot operate at 16 MHz when supplied at 1.8 V. According to TI's SLAS722G specification, the maximum allowed CPU frequency at 1.8 V is 1 MHz. The 16 MHz DCO calibration is valid only at VCC ≥ 2.2 V. At 1.8 V, the device must use lower DCO settings (e.g., 1 MHz or 8 MHz with reduced VCC tolerance), and the MSP430G2352IPW20R datasheet explicitly restricts high-frequency operation to higher supply voltages to ensure timing margin and stability.

How many I/O pins on the MSP430G2352IPW20R support capacitive touch sensing?

The MSP430G2352IPW20R supports capacitive touch sensing on up to 8 I/O pins - specifically P1.0 through P1.7 - as confirmed in the functional block diagram and device description. Each pin includes a dedicated pin-oscillator enable bit (P1SEL.x) and programmable pullup/pulldown resistors (P1REN.x), enabling self-capacitance or mutual-capacitance touch implementations without external components. This capability is fully integrated and requires no additional hardware beyond standard decoupling.