Texas Instruments MSP430G2312IN20

Overview

MSP430G2312IN20 from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller in 20-pin PDIP packaging, featuring 4 KB flash, 256 B RAM, one 16-bit Timer_A with three capture/compare registers, Universal Serial Interface (USI) for SPI/I²C, and an 8-channel 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 MSP430G2312IN20 datasheet, MSP430G2312IN20 pinout, MSP430G2312IN20 application, or MSP430G2312IN20 equivalent, key selection criteria include its 20-pin PDIP package compatibility, absence of integrated ADC10 (distinguishing it from G2x52 variants), USI-based serial interface flexibility, and sub-1 µs wake-up from standby mode for responsive low-power sensing.

Technical Context

The MSP430G2312IN20 implements a 16-bit RISC CPU with constant generators and seven addressing modes, enabling single-cycle register operations. Its clock system integrates a digitally controlled oscillator (DCO) calibrated at four frequencies up to 16 MHz, plus LF and VLO oscillators - all configurable via BCSCTL registers without external components.

Peripheral integration includes USI supporting master/slave SPI and I²C protocols, Timer_A3 with three CC registers for PWM and capture timing, and Comparator_A+ with eight selectable inputs and internal reference options. Port P1 and P2 provide eight programmable I/O pins each, with individually configurable pullup/pulldown resistors and capacitive-touch enable bits.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2332IN20, the MSP430G2312IN20 omits ADC10 to reduce cost and power - making it optimal for comparator-based thresholding or digital-only I/O systems. Against MSP430G2212IN20, it provides double the RAM and 4× flash capacity for more complex state management and firmware updates.

Availability

MSP430G2312IN20 is available at Aetrix Electronics and suitable for smart sensor nodes, industrial control panels, portable medical monitors, and energy harvesting nodes requiring stable component supply across long-lifecycle embedded programs.

Supply support for MSP430G2312IN20 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 integration.

The MSP430G2xx family targets ultra-low-power portable measurement and sensing applications - designed to maximize battery life through intelligent power gating, fast wake-up, and integrated analog peripherals.

FAQ

What is the maximum operating frequency of the MSP430G2312IN20?

The MSP430G2312IN20 supports an internal digitally controlled oscillator (DCO) calibrated at four frequencies up to 16 MHz. While the DCO can be tuned beyond calibration points, TI specifies reliable operation up to 16 MHz under rated voltage and temperature conditions. The device does not include a high-frequency crystal oscillator option - XIN/XOUT pins support only 32-kHz watch crystals.

Does the MSP430G2312IN20 include an analog-to-digital converter (ADC)?

No, the MSP430G2312IN20 does not include the ADC10 module. It belongs to the G2x12 series, which omits the 10-bit SAR ADC present in G2x52 variants like MSP430G2352IN20. Instead, it provides an 8-channel Comparator_A+ for threshold detection, window comparison, and slope A/D conversion - requiring external RC networks for basic integrating ADC implementations.

How many I/O pins does the MSP430G2312IN20 offer in the 20-pin PDIP package?

The MSP430G2312IN20 provides 16 usable I/O pins in the 20-pin PDIP package: eight on Port P1 (P1.0–P1.7) and eight on Port P2 (P2.0–P2.7). Pins 1 (DVCC), 16 (RST/NMI/SBWTDIO), 17 (TEST/SBWTCK), 19 (XIN/P2.6/TA0.1), and 20 (DVSS) are power, reset, debug, or clock functions - not general-purpose I/O. All 16 I/O pins support individual direction, pullup/pulldown, and interrupt configuration.

Can the MSP430G2312IN20 be programmed in-system without removing it from the PCB?

Yes, the MSP430G2312IN20 supports in-system programming via its Spy-Bi-Wire (SBW) interface using only two pins: RST/NMI/SBWTDIO (pin 16) and TEST/SBWTCK (pin 17). This allows full flash programming, debugging, and security fuse configuration while soldered on the target board - no socket or external programmer adapter is required for development or field updates.

What low-power modes are supported by the MSP430G2312IN20, and what is the lowest current draw?

The MSP430G2312IN20 supports five software-selectable low-power modes (LPM0–LPM4). In LPM4 (RAM retention, all clocks disabled), it draws just 0.1 µA at 3 V and 25°C. This mode retains full register and RAM content while disabling the DCO, VLO, and crystal oscillator - enabling instantaneous wake-up upon interrupt while minimizing energy leakage during extended idle periods.