Texas Instruments MSP430G2112IN20

Overview

MSP430G2112IN20 from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller in 20-pin PDIP packaging, featuring 1 kB Flash, 128 B RAM, one 16-bit Timer_A with three capture/compare registers, Universal Serial Interface (USI) for SPI/I²C, and an on-chip analog comparator. It operates from 1.8 V to 3.6 V and supports five power-saving modes - ideal for battery-powered sensor nodes and portable instrumentation.

For engineers reviewing the MSP430G2112IN20 datasheet, MSP430G2112IN20 pinout, MSP430G2112IN20 application, or MSP430G2112IN20 equivalent, key selection criteria include its 1 kB Flash size, absence of ADC10 (distinguishing it from G2x52 variants), 8 I/O pins with capacitive-touch capability, Spy-Bi-Wire debug interface, and PDIP-20 package compatibility with legacy through-hole prototyping.

Technical Context

The MSP430G2112IN20 implements a 16-bit RISC CPU with 62.5-ns instruction cycle time and constant generators for optimized code efficiency. Its clock system integrates a digitally controlled oscillator (DCO), internal low-frequency oscillator (VLO), and external crystal support (32 kHz), enabling sub-1 µs wake-up from standby mode.

Peripheral integration includes USI supporting master/slave SPI and I²C protocols, Timer_A3 with three capture/compare channels for PWM and timing, and Comparator_A+ with eight selectable inputs - all accessible via fully programmable digital I/O ports P1 and P2, each with individually configurable pullup/pulldown resistors and interrupt edge select.

Key Specifications

Pinout & Package

Package: 20-pin Plastic Dual In-line Package (PDIP), 0.600-inch width, through-hole mounting compatible with standard breadboards and PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with MSP430G2132IN20, the MSP430G2112IN20 omits ADC10 to reduce cost and silicon area while maintaining identical ultra-low-power operation and USI/timer/comparator functionality; versus MSP430G2212IN20, it trades Flash/RAM capacity for lower unit price in fixed-function deployments.

Availability

MSP430G2112IN20 is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, smart utility meter interfaces, and home automation controllers requiring stable component supply across long-lifecycle embedded programs.

Supply support for MSP430G2112IN20 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 delivering analog, embedded processing, and connectivity solutions with emphasis on energy efficiency and system-level innovation.

The MSP430G2xx family targets ultra-low-power mixed-signal applications - designed specifically for battery-operated sensing, measurement, and control systems where nanowatt-scale power consumption and integrated analog peripherals are critical.

FAQ

Does MSP430G2112IN20 include an analog-to-digital converter (ADC)?

No, MSP430G2112IN20 does not include ADC10 functionality. Per the official datasheet SLAS722G, ADC10 is exclusive to MSP430G2x52 devices. The MSP430G2112IN20 belongs to the G2x12 series and features only the analog comparator (Comparator_A+) - confirmed by Table 1 and terminal function notes indicating "ADC10 pin functions are available only on MSP430G2x52."

What is the maximum operating frequency of MSP430G2112IN20?

The MSP430G2112IN20 supports up to 16 MHz system clock via its factory-calibrated digitally controlled oscillator (DCO). This frequency is achievable across the full 1.8 V–3.6 V supply range and enables 62.5-ns instruction cycle time - verified in the "Clock System" section and calibration tables of SLAS722G.

Which debug interface does MSP430G2112IN20 support?

MSP430G2112IN20 supports Spy-Bi-Wire (2-wire JTAG) via pins RST/NMI/SBWTDIO (Pin 16) and TEST/SBWTCK (Pin 17). This interface enables full in-system programming, breakpoint debugging, and flash security fuse configuration - documented in the "On-Chip Emulation Logic" feature list and pinout diagrams of SLAS722G.

Can MSP430G2112IN20 drive capacitive-touch buttons?

Yes, MSP430G2112IN20 supports capacitive-touch sensing on up to 16 I/O pins using its integrated pin-oscillator circuitry. Though only 8 pins are exposed in the 20-pin PDIP package (P1.0–P1.7), each is individually configurable for touch operation - confirmed in the "Features" section and functional block diagram of SLAS722G.

What package type and pin count does MSP430G2112IN20 use?

MSP430G2112IN20 uses a 20-pin Plastic Dual In-line Package (PDIP) with 0.600-inch body width. This is explicitly listed in Table 1 ("Available Options") and confirmed in the "DEVICE PINOUTS" section of SLAS722G, where the "N" package designation corresponds to PDIP-20.