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Home > Products > Integrated Circuits (ICs) > Embedded > Microcontrollers

Texas Instruments MSP430G2303IPW20R

Name: MSP430G2303IPW20R
Brand: Texas Instruments
SKU: MSP430G2303IPW20R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MSP430G2303IPW20R

Manufacturer:: Texas Instruments

Category:: Microcontrollers

Package:: 20-TSSOP (0.173", 4.40mm Width)

Datasheet:: MSP430G2303IPW20R.pdf

Description:: IC MCU 16BIT 4KB FLASH 20TSSOP

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Product details

Overview

MSP430G2303IPW20R from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller in TSSOP-20 package, featuring 4 KB Flash, 256 B RAM, two 16-bit Timer_A modules, USCI (UART/I²C/SPI), and 16 I/O pins with capacitive-touch capability - deployed in battery-powered sensor nodes and power management subsystems.

For engineers reviewing the MSP430G2303IPW20R datasheet, MSP430G2303IPW20R pinout, MSP430G2303IPW20R application, or MSP430G2303IPW20R equivalent, key selection criteria include active-mode current at 1 MHz (230 µA @ 2.2 V), standby current (0.5 µA), Spy-Bi-Wire debug interface, 1.8–3.6 V supply range, and absence of integrated ADC (distinguishing it from G2x33 variants).

Technical Context

The MSP430G2303IPW20R implements a 16-bit CPU with constant generators and six operating modes (including LPM4 with 0.1 µA RAM retention). Its clock system integrates a digitally controlled oscillator (DCO) calibrated to 1 MHz, 8 MHz, 12 MHz, and 16 MHz, plus internal VLO and external 32-kHz crystal support.

Peripherals include two Timer_A modules (each with three capture/compare registers), USCI_A0 (UART/LIN/IrDA/SPI) and USCI_B0 (SPI/I²C), and programmable pull-up/pull-down resistors on all I/O ports - but no ADC10, as confirmed by device comparison table and signal descriptions.

Key Specifications

Parameter	Value and Actual Design Meaning
Core Architecture	16-bit RISC CPU with 16 registers and constant generators; enables high code efficiency for embedded control tasks.
Flash / RAM	4 KB Flash program memory and 256 B RAM - sufficient for compact firmware with real-time sensor polling and communication stacks.
Supply Voltage	1.8 V to 3.6 V - supports direct operation from single-cell Li-ion, alkaline, or coin-cell batteries without regulation.
Active Current	230 µA at 1 MHz, 2.2 V - defines baseline power budget for continuous sensing or polling loops.
Standby Current	0.5 µA - enables multi-year operation in wake-on-event applications such as door/window sensors.
Debug Interface	Spy-Bi-Wire (2-wire JTAG) - allows in-system programming and debugging with minimal PCB footprint and pin count.
Max System Clock	16 MHz at 3.3 V - sets upper bound for real-time processing throughput and UART baud rate generation.
I/O Pins	16 GPIO with interrupt capability, capacitive-touch support, and configurable pull-up/pull-down - suitable for buttonless HMI and low-pin-count interfaces.

Pinout & Package

TSSOP-20 (PW20) package: 6.5 mm × 4.4 mm body, 0.65 mm pitch, surface-mount, leaded plastic package with exposed thermal pad not required.

Pin/Terminal	Circuit Role	Design Meaning
1: DVCC	Digital supply voltage input	Primary power rail for core logic and digital I/O; must be decoupled locally with 100 nF ceramic capacitor.
2: P1.0/TA0CLK/ACLK/A0	Multi-function I/O	Configurable as timer clock input, ACLK output, or general-purpose I/O - no ADC channel (A0 not functional on G2x03).
3: P1.1/TA0.0/UCA0RXD/A1	USCI_A0 receive input	Default UART RX pin; also serves as Timer0_A CCI0A input and GPIO - no ADC function (A1 disabled).
4: P1.2/TA0.1/UCA0TXD/A2	USCI_A0 transmit output	Default UART TX pin; dual-use as Timer0_A CCI1A input - no ADC function (A2 disabled).
5: P1.3/ADC10CLK/VREF-/VEREF-/A3	Reference voltage terminal	VREF−/VEREF− input only; ADC10CLK and A3 functions are absent - confirms no ADC10 peripheral on MSP430G2303.
6: P1.4/SMCLK/UCB0STE/UCA0CLK/A4	USCI clock control	Provides SMCLK output or USCI clock source; UCB0STE and UCA0CLK enable synchronous slave mode - no ADC A4.
7: P1.5/TA0.0/UCB0CLK/UCA0STE/A5	USCI clock/enable control	Supports SPI/I²C clocking and slave transmit enable; TA0.0 used for compare/output - no ADC A5.
14: P1.6/TA0.1/UCB0SOMI/UCB0SCL/A6	I²C clock or SPI data input	Configurable as SCL (I²C) or SOMI (SPI); TA0.1 for timer compare - no ADC A6.
15: P1.7/UCB0SIMO/UCB0SDA/A7	I²C data or SPI data output	Configurable as SDA (I²C) or SIMO (SPI); no ADC A7 - consistent with G2x03 family exclusion of ADC10.
8: P2.0/TA1.0	Timer1_A capture/compare	CCI0A input or Out0 output for Timer1_A - no analog function or alternate peripheral mapping.
9: P2.1/TA1.1	Timer1_A capture/compare	CCI1A/CCI1B input or Out1 output - supports quadrature decoding or PWM generation.
10: P2.2/TA1.1	Timer1_A capture/compare	Second CCI1B input path - enables dual-edge capture on same timer channel.
11: P2.3/TA1.0	Timer1_A capture/compare	Second CCI0B input path - supports redundant or differential timing inputs.
12: P2.4/TA1.2	Timer1_A capture/compare	CCI2A input or Out2 output - extends timer to three independent compare/capture channels.
13: P2.5/TA1.2	Timer1_A capture/compare	CCI2B input - enables dual-input capture per Timer1_A channel.
19: XIN/P2.6/TA0.1	Crystal oscillator input	Accepts 32-kHz crystal for ACLK; P2.6 retains TA0.1 functionality when crystal not used.
18: XOUT/P2.7	Crystal oscillator output	Drives external crystal; P2.7 remains available as GPIO if oscillator disabled.
16: RST/NMI/SBWTDIO	Reset and debug I/O	Active-low reset, NMI input, and bidirectional Spy-Bi-Wire data line - shared pin requires careful reset circuit design.
17: TEST/SBWTCK	Debug clock input	JTAG test mode select and Spy-Bi-Wire clock - must be pulled high during normal operation to avoid unintended test entry.
20: DVSS	Digital ground reference	Return path for DVCC; requires low-impedance connection to system ground plane.

Key Features

Feature	Design Value
Ultra-low-power operation	0.5 µA standby and 0.1 µA off-mode (RAM retention) enable decade-scale battery life in intermittent-sensing applications.
Digitally controlled oscillator (DCO)	Factory-calibrated to 1/8/12/16 MHz - eliminates need for external crystal in cost-sensitive designs while maintaining ±3% accuracy.
Spy-Bi-Wire debug interface	2-pin in-system programming and real-time debugging - reduces test fixture complexity and PCB routing overhead.
Capacitive-touch I/O capability	16 GPIO pins support capacitive sensing without external components - enables touch buttons, sliders, and proximity detection.
USCI communication modules	Independent USCI_A0 (UART/LIN/IrDA/SPI) and USCI_B0 (SPI/I²C) allow concurrent serial protocols - ideal for sensor hub architectures.
Five low-power modes	LPM0–LPM4 with sub-µs wake-up from LPM3 - supports event-driven execution with deterministic latency for time-critical interrupts.

Applications

Smart Utility Meter Sensor Node	Industrial Temperature Monitor
Use Scenario: Battery-powered gas/water meter reads pulse outputs from mechanical counters and transmits data via UART to RF module every 15 minutes. IC Role / Device Role / Timing Role: Central controller managing sleep/wake cycles, pulse counting via Timer_A capture, and UART framing for telemetry packets. Use Value: 0.5 µA standby current extends AA battery life beyond 10 years; Spy-Bi-Wire enables field firmware updates without meter disassembly.	Use Scenario: DIN-rail mounted temperature monitor samples thermistor voltage using external ADC, logs min/max values, and reports over I²C to PLC. IC Role / Device Role / Timing Role: Host processor coordinating I²C reads, nonvolatile logging, and watchdog supervision - no onboard ADC required. Use Value: 16 GPIO with configurable pull-ups simplify connection to discrete sensors and status LEDs; 1.8 V operation ensures compatibility with wide-input industrial PSUs.
Capacitive-Touch Remote Control	Low-Cost Power Management Unit
Use Scenario: IR remote uses touch pads instead of mechanical buttons; detects swipe gestures and sends encoded commands via IR LED driver. IC Role / Device Role / Timing Role: Capacitive-touch engine and IR carrier generator - leverages built-in touch I/O and Timer_A for 38 kHz modulation. Use Value: All 16 I/O pins support touch sensing - eliminates dedicated touch controller IC and reduces BOM count by one component.	Use Scenario: Embedded system supervises DC-DC converter sequencing, monitors undervoltage events, and asserts reset signals to FPGA and ASIC. IC Role / Device Role / Timing Role: Power sequencer and brownout detector - uses internal BOR and GPIO-controlled enable lines for multi-rail supplies. Use Value: Brownout detector triggers reset at 1.7 V (±2%), ensuring clean power-up across full 1.8–3.6 V range; no external supervisor IC needed.

Smart Utility Meter Sensor Node

Industrial Temperature Monitor

Use Scenario: Battery-powered gas/water meter reads pulse outputs from mechanical counters and transmits data via UART to RF module every 15 minutes.

IC Role / Device Role / Timing Role: Central controller managing sleep/wake cycles, pulse counting via Timer_A capture, and UART framing for telemetry packets.

Use Value: 0.5 µA standby current extends AA battery life beyond 10 years; Spy-Bi-Wire enables field firmware updates without meter disassembly.

Use Scenario: DIN-rail mounted temperature monitor samples thermistor voltage using external ADC, logs min/max values, and reports over I²C to PLC.

IC Role / Device Role / Timing Role: Host processor coordinating I²C reads, nonvolatile logging, and watchdog supervision - no onboard ADC required.

Use Value: 16 GPIO with configurable pull-ups simplify connection to discrete sensors and status LEDs; 1.8 V operation ensures compatibility with wide-input industrial PSUs.

Capacitive-Touch Remote Control

Low-Cost Power Management Unit

Use Scenario: IR remote uses touch pads instead of mechanical buttons; detects swipe gestures and sends encoded commands via IR LED driver.

IC Role / Device Role / Timing Role: Capacitive-touch engine and IR carrier generator - leverages built-in touch I/O and Timer_A for 38 kHz modulation.

Use Value: All 16 I/O pins support touch sensing - eliminates dedicated touch controller IC and reduces BOM count by one component.

Use Scenario: Embedded system supervises DC-DC converter sequencing, monitors undervoltage events, and asserts reset signals to FPGA and ASIC.

IC Role / Device Role / Timing Role: Power sequencer and brownout detector - uses internal BOR and GPIO-controlled enable lines for multi-rail supplies.

Use Value: Brownout detector triggers reset at 1.7 V (±2%), ensuring clean power-up across full 1.8–3.6 V range; no external supervisor IC needed.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MSP430G2203IPW20R	2 KB Flash, 128 B RAM, identical peripherals and pinout - lower memory capacity only.	Targeted at simpler firmware with smaller code footprint (e.g., basic GPIO sequencers).	Select when application fits within 2 KB Flash and does not require future feature expansion.
MSP430G2333IPW20R	Includes 10-bit 8-channel ADC10, same Flash/RAM, identical package and pinout - adds analog front-end capability.	Required where direct analog sensing (e.g., battery voltage, thermistor) is needed without external ADC.	Choose when analog signal acquisition is essential; note ADC10 consumes additional current and occupies A0–A7 pins.

Compared with MSP430G2203IPW20R, the MSP430G2303IPW20R provides double Flash and RAM for more complex control logic; compared with MSP430G2333IPW20R, it omits ADC10 to reduce cost and power in purely digital I/O or communication-centric designs.

Availability

MSP430G2303IPW20R is available at Aetrix Electronics and suitable for smart utility meter sensor nodes, industrial temperature monitors, capacitive-touch remotes, and low-cost power management units requiring stable component supply and long-term manufacturability.

Supply support for MSP430G2303IPW20R 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and consumer markets since 1930.

The MSP430G2xx family was designed for cost-sensitive, battery-operated applications demanding ultra-low power, integrated peripherals, and rapid development - targeting sensor interfaces, portable instrumentation, and energy-harvesting systems.

FAQ

Does MSP430G2303IPW20R include an analog-to-digital converter (ADC)?

No, MSP430G2303IPW20R does not include an ADC. It belongs to the G2x03 subfamily, which lacks the ADC10 module present in G2x33 variants like MSP430G2333IPW20R. Pin functions labeled A0–A7 on MSP430G2303IPW20R are not connected to an internal ADC and serve only as GPIO or timer/peripheral signals.

What is the maximum operating frequency of MSP430G2303IPW20R?

The MSP430G2303IPW20R supports a maximum system clock (MCLK) frequency of 16 MHz at 3.3 V, 12 MHz at 2.7 V, and 6 MHz at 1.8 V, as specified in the Recommended Operating Conditions table. The DCO is factory-calibrated to these frequencies and requires no external crystal for basic operation.

Which debug interface does MSP430G2303IPW20R support?

MSP430G2303IPW20R supports the Spy-Bi-Wire (SBW) interface using pins RST/NMI/SBWTDIO (Pin 16) and TEST/SBWTCK (Pin 17). This 2-wire protocol replaces full 4-wire JTAG and is fully compatible with TI's MSP-FET and LaunchPad debuggers for programming and real-time debugging.

Can MSP430G2303IPW20R drive capacitive-touch sensors directly?

Yes, MSP430G2303IPW20R supports capacitive-touch sensing on all 16 I/O pins without external components. Its GPIO structure includes programmable Schmitt triggers, controllable drive strength, and integrated RC oscillation measurement capability - enabling robust touch-button and slider implementations per the MSP430 CapTIvate™ design guidelines.

Is MSP430G2303IPW20R pin-compatible with other devices in the G2xx family?

Yes, MSP430G2303IPW20R is pin-compatible with other TSSOP-20 G2xx devices including MSP430G2203IPW20R and MSP430G2333IPW20R. All share identical pin numbering, electrical characteristics, and I/O functionality - allowing hardware reuse across memory and peripheral variants with only firmware changes required.

MSP430G2303IPW20R Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Package/Case:: 20-TSSOP (0.173", 4.40mm Width)

Series:: MSP430G2xx

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Core Processor:: MSP430 CPU16

Core Size:: 16-Bit

Speed:: 16MHz

Connectivity:: I2C, IrDA, LINbus, SCI, SPI, UART/USART

Peripherals:: Brown-out Detect/Reset, PWM, WDT

Number of I/O:: 16

Program Memory Size:: 4KB (4K x 8)

Program Memory Type:: FLASH

EEPROM Size:: -

RAM Size:: 256 x 8

Voltage - Supply (Vcc/Vdd):: 1.8V ~ 3.6V

Data Converters:: -

Oscillator Type:: Internal

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

MSP430G2303IPW20R FAQ

1.How can I place an order for MSP430G2303IPW20R through Aetrix?

Please submit a Request for Quotation (RFQ) for MSP430G2303IPW20R on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MSP430G2303IPW20R reliable?

The price and inventory of MSP430G2303IPW20R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430G2303IPW20R is usually 5 days.

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MSP430G2303IPW20R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MSP430G2303IPW20R order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MSP430G2303IPW20R?

For technical support, including MSP430G2303IPW20R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430G2303IPW20R requirements.

6.How does Aetrix verify that MSP430G2303IPW20R is sourced from the original manufacturer or authorized distributors?

All MSP430G2303IPW20R products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MSP430G2303IPW20R meets industry standards.

7.What is the process for return or replacement of MSP430G2303IPW20R?

All MSP430G2303IPW20R units undergo pre-shipment inspection (PSI). If there is an issue with MSP430G2303IPW20R, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MSP430G2303IPW20R part is unused and in its original packaging.

Return procedure for MSP430G2303IPW20R:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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