Texas Instruments MSP430G2233IN20

Overview

MSP430G2233IN20 from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller featuring 2 KB flash, 256 B RAM, a 10-bit 200-ksps ADC with 8 channels and internal reference, two 16-bit Timer_A modules with three capture/compare registers each, USCI supporting UART/LIN/IrDA/SPI/I²C, and up to 16 capacitive-touch I/O pins in its 20-pin PDIP package. It targets battery-powered sensor nodes and portable measurement systems requiring sub-1 µs wake-up and <0.1 µA off-mode current.

For engineers reviewing the MSP430G2233IN20 datasheet, MSP430G2233IN20 pinout, MSP430G2233IN20 application, or MSP430G2233IN20 equivalent, key selection considerations include its 2 KB flash size, 10-bit ADC capability (absent in G2x03 variants), 20-pin PDIP mechanical compatibility, and Spy-Bi-Wire debug interface - all critical for legacy through-hole designs and low-cost industrial sensing.

Technical Context

The MSP430G2233IN20 implements a 16-bit CPU with constant generators and a digitally controlled oscillator (DCO) calibrated at factory for 1/8/12/16 MHz operation. Its clock system integrates LF crystal support (32 kHz), internal VLO, and DCO-based MCLK/SMCLK/ACLK routing - enabling precise timing control across five power modes including LPM4 (0.1 µA).

Peripherals are tightly coupled to the USCI and Timer_A modules: USCI_A0 supports LIN-compliant UART with auto-baud detection, while Timer_A0/A1 provide dual 16-bit timing with three CC registers each, supporting PWM, input capture, and interval counting - essential for sensor signal conditioning and communication protocol timing.

Key Specifications

Pinout & Package

Package: 20-pin PDIP (N20), 24.33 mm × 6.35 mm body, through-hole mounting compatible with legacy prototyping and industrial PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2233IPW, the MSP430G2233IN20 offers identical functionality in a through-hole PDIP package for manual assembly and legacy compatibility; versus MSP430G2333IN20, it trades flash capacity for lower unit cost and smaller die size - ideal for fixed-function sensor endpoints with minimal code footprint.

Availability

MSP430G2233IN20 is available at Aetrix Electronics and suitable for industrial sensor nodes, portable gas detectors, smart thermostat interfaces, and capacitive touch remotes requiring stable component supply and long-term manufacturability.

Supply support for MSP430G2233IN20 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 decades of expertise in ultra-low-power design.

The MSP430G2xx family was engineered for cost-sensitive, battery-operated applications demanding extended runtime, integrated analog peripherals, and robust development tooling - targeting industrial sensing, metering, and portable instrumentation.

FAQ

What is the maximum operating frequency of the MSP430G2233IN20?

The MSP430G2233IN20 supports a maximum system clock (MCLK) frequency of 16 MHz at VCC = 3.3 V, 12 MHz at 2.7 V, and 6 MHz at 1.8 V. This is achieved using the factory-calibrated DCO oscillator; external crystals are limited to 32 kHz for low-frequency operation. The MSP430G2233IN20's timing architecture ensures stable execution across its full voltage range without external PLLs or frequency multipliers.

Does the MSP430G2233IN20 include an analog-to-digital converter?

Yes, the MSP430G2233IN20 integrates a 10-bit, 200-ksps successive-approximation ADC (ADC10) with 8 input channels, internal reference (1.5 V or 2.5 V), sample-and-hold, and autoscan mode. This ADC is exclusive to the G2x33 family - absent in G2x03 variants - and is fully functional on the MSP430G2233IN20 with dedicated analog pins (A0–A7) mapped to Port 1.

What debug interface does the MSP430G2233IN20 support?

The MSP430G2233IN20 uses the Spy-Bi-Wire (SBW) interface, a two-wire variant of JTAG implemented on pins RST/NMI/SBWTDIO and TEST/SBWTCK. This interface enables full in-system programming, real-time debugging, and flash memory erase - all without requiring a 4-pin JTAG header. The MSP430G2233IN20's SBW implementation is fully supported by TI's MSP-FET and open-source tools like naken_asm.

Is the MSP430G2233IN20 pin-compatible with other MSP430G2xx devices in PDIP packages?

Yes, the MSP430G2233IN20 shares identical pinout and electrical characteristics with MSP430G2333IN20 and MSP430G2433IN20 in the 20-pin PDIP (N20) package. All three feature the same peripheral mappings, I/O functions, and power pin locations - allowing drop-in replacement where flash size requirements permit. However, MSP430G2x03 variants lack the ADC10 module and associated analog pins.

What low-power modes are available on the MSP430G2233IN20?

The MSP430G2233IN20 offers five configurable low-power modes: LPM0 (CPU off, MCLK disabled, SMCLK/ACLK active), LPM1 (MCLK/SMCLK off), LPM2 (DCO off), LPM3 (VLO active only), and LPM4 (all clocks off, RAM retention at 0.1 µA). Wake-up from LPM3/LPM4 occurs in under 1 µs via interrupts on any enabled I/O or timer - making the MSP430G2233IN20 ideal for event-driven sensing.