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Texas Instruments MSP430G2433IN20
- Part No.:
- MSP430G2433IN20
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
MSP430G2433IN20.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:311
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Product details
Overview
MSP430G2433IN20 from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller in 20-pin PDIP package, featuring 8 KB flash, 512 B RAM, 10-bit 200-ksps ADC with 8 channels, two 16-bit Timer_A modules, USCI with UART/LIN/IrDA/SPI/I²C, and capacitive-touch-enabled I/O. 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 MSP430G2433IN20 datasheet, MSP430G2433IN20 pinout, MSP430G2433IN20 application, or MSP430G2433IN20 equivalent, key selection criteria include calibrated DCO frequencies (1/8/12/16 MHz), brownout detection, Spy-Bi-Wire debug interface, and 24-capacitive-touch I/O capability across 20–32-pin variants - all validated for industrial temperature range (–40°C to 85°C) and 1.8–3.6 V operation.
Technical Context
The MSP430G2433IN20 implements a 16-bit CPU with constant generators and 62.5-ns instruction cycle time, paired with a digitally controlled oscillator (DCO) that enables wake-up from standby mode in under 1 µs. Its clock system supports internal LF oscillator, 32-kHz crystal, and external digital sources - all configurable via Basic Clock Module registers.
Peripherals include dual 16-bit Timer_A units (each with three capture/compare registers), USCI_A0 (UART/LIN/IrDA/SPI) and USCI_B0 (SPI/I²C), and a 10-bit ADC with internal reference, sample-and-hold, and autoscan - all operating within the same ultra-low-power framework that delivers 230 µA active current at 1 MHz/2.2 V.
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 | 8 KB flash memory and 512 B RAM - sufficient for standalone sensor firmware with calibration tables and communication stacks. |
| ADC Resolution | 10-bit SAR ADC with 8 input channels, 200-ksps sampling rate, and internal reference - supports precision analog sensing without external components. |
| Power Modes | Five low-power modes including Off mode (0.1 µA RAM retention) and Standby mode (0.5 µA) - extends battery life in intermittent-sampling applications. |
| Operating Voltage | 1.8 V to 3.6 V supply range - compatible with single-cell Li-ion, alkaline, or coin-cell batteries without regulation. |
| Max System Clock | 16 MHz MCLK at 3.3 V - provides real-time processing headroom for LIN bus timing, capacitive touch scanning, and ADC burst acquisition. |
| ESD Rating | ±1000 V HBM - ensures robustness during handling and PCB assembly in industrial environments. |
Pinout & Package
Package: 20-pin PDIP (N20), body size 24.33 mm × 6.35 mm, through-hole mounting, RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: DVCC | Digital supply voltage | Primary power rail for core logic and digital I/O; must be decoupled near pin with 100 nF ceramic capacitor. |
| 2: P1.0/TA0CLK/ACLK/A0 | Multi-function I/O | Configurable as timer clock input, ACLK output, or ADC channel 0 - enables flexible clock tree and analog signal routing. |
| 5: P1.3/ADC10CLK/VREF-/VEREF-/A3 | Analog reference & ADC input | Provides negative ADC reference (VREF−) and analog input A3; supports differential or single-ended ADC configurations. |
| 6: P1.4/SMCLK/UCB0STE/UCA0CLK/A4/VREF+/VEREF+ | System clock & peripheral interface | Delivers SMCLK to peripherals, serves as SPI slave transmit enable or UART clock, and supplies positive ADC reference (VREF+). |
| 16: RST/NMI/SBWTDIO | Reset & debug interface | Active-low reset input, non-maskable interrupt, and bidirectional Spy-Bi-Wire data line - enables in-system programming and debugging. |
| 17: TEST/SBWTCK | JTAG/Spy-Bi-Wire clock | Test mode select and Spy-Bi-Wire clock input - required for fuse blowing and boundary-scan testing. |
| 18: XOUT/P2.7 | Crystal oscillator output | Drives external 32-kHz crystal; must be used with XIN (pin 19) for low-frequency timing critical to RTC and low-power sleep modes. |
| 19: XIN/P2.6/TA0.1 | Crystal oscillator input | Accepts crystal input or external clock; also functions as Timer0_A compare output - supports dual-role timing resource sharing. |
| 20: DVSS | Digital ground | Reference return path for digital circuitry; must be connected to system ground plane with low-inductance path. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast wake-up | Sub-1 µs transition from Standby to Active mode - enables event-driven sampling with minimal latency and energy overhead. |
| Capacitive-touch I/O | Up to 24 pins support capacitive sensing without external components - reduces BOM cost and PCB area in HMI designs. |
| Integrated LIN support | USCI_A0 UART with automatic baud-rate detection - simplifies automotive body electronics integration without external LIN transceivers. |
| On-chip emulation | Spy-Bi-Wire interface with 2-pin debug - eliminates need for full JTAG header, saving board space and reducing debug complexity. |
| Calibrated DCO | Four factory-trimmed DCO frequencies (1/8/12/16 MHz) - eliminates external crystal for many timing-critical applications while maintaining ±2% accuracy. |
Applications
| Smart Sensor Node | Industrial Control Panel |
|---|---|
Use Scenario: Battery-powered environmental monitor measuring temperature, humidity, and light levels every 30 seconds, transmitting data via UART to gateway. IC Role / Device Role / Timing Role: Central controller managing ADC sampling, capacitive button interface, low-power sleep scheduling, and UART transmission timing. Use Value: 0.1 µA off-mode current and 230 µA active current at 1 MHz extend coin-cell life beyond 5 years; integrated ADC and calibrated DCO eliminate external timing and signal-conditioning components. |
Use Scenario: Front-panel interface for HVAC controller with tactile buttons, LED indicators, and RS-485 communication. IC Role / Device Role / Timing Role: Human-machine interface processor handling capacitive touch decoding, LED PWM dimming, and UART-to-RS-485 bridge timing. Use Value: 24-capacitive-touch I/O pins support multi-button layout without external ICs; USCI_B0 I²C interface connects to local temperature sensor; 8 KB flash stores localized UI firmware. |
| Portable Medical Device | Energy Harvesting System |
Use Scenario: Handheld pulse oximeter acquiring analog photodiode signals, performing real-time SpO₂ calculation, and displaying results on segment LCD. IC Role / Device Role / Timing Role: Mixed-signal processor executing ADC conversions, digital filtering, and LCD segment drive timing via Timer_A outputs. Use Value: 10-bit ADC with internal reference and autoscan supports simultaneous multi-channel acquisition; 512 B RAM accommodates filter coefficients and display buffers. |
Use Scenario: Solar-powered soil moisture sensor using supercapacitor storage, waking periodically to measure and transmit data via low-power UART. IC Role / Device Role / Timing Role: Power-aware system manager coordinating energy harvesting charge control, ADC-based moisture sensing, and scheduled RF wake-up triggers. Use Value: Brownout detector prevents erratic operation during capacitor discharge; five programmable low-power modes match duty-cycle requirements of intermittent harvesting sources. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430G2533IN20 | 16 KB flash, 512 B RAM, identical peripherals and pinout - higher memory capacity only. | Supports larger firmware images (e.g., OTA update stack + application) but requires same PCB layout and power design. | Select when firmware exceeds 8 KB or future scalability is required; no hardware change needed. |
| MSP430G2433IPW20 | Same silicon, TSSOP-20 package (6.5 mm × 4.4 mm) - smaller footprint, surface-mount only. | Better suited for space-constrained PCBs; requires reflow soldering instead of through-hole assembly. | Choose for automated manufacturing and compact designs; verify thermal performance under same ambient conditions. |
Compared with MSP430G2433IN20, the MSP430G2533IN20 offers double flash capacity without altering power or timing behavior, while the MSP430G2433IPW20 retains identical functionality in a surface-mount form factor - enabling layout optimization without firmware or peripheral redesign.
Availability
MSP430G2433IN20 is available at Aetrix Electronics and suitable for smart sensor nodes, industrial control panels, portable medical devices, and energy harvesting systems requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.
Supply support for MSP430G2433IN20 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 and industrial-grade reliability.
The MSP430G2x33 product line was engineered for cost-sensitive, battery-operated applications demanding extended runtime, integrated analog front-ends, and robust debug capabilities - targeting sensor interfaces, capacitive touch, and simple control systems.
FAQ
What is the maximum operating frequency of the MSP430G2433IN20?
The MSP430G2433IN20 supports a maximum system clock (MCLK) of 16 MHz at 3.3 V, 12 MHz at 2.7 V, and 6 MHz at 1.8 V. This frequency is generated by the calibrated digitally controlled oscillator (DCO) and governs CPU execution speed, peripheral timing, and ADC conversion rates. The MSP430G2433IN20 does not require an external crystal for basic operation due to factory-trimmed DCO frequencies.
Does the MSP430G2433IN20 support capacitive touch sensing?
Yes, the MSP430G2433IN20 supports capacitive touch sensing on up to 24 I/O pins across its package variants. In the 20-pin PDIP (N20) configuration, 16 I/O pins are available for capacitive touch - implemented using built-in RC oscillation timing and software libraries such as TI's CapTIvate™. No external components are required for basic touch button detection.
What debug interface does the MSP430G2433IN20 use?
The MSP430G2433IN20 uses the Spy-Bi-Wire (SBW) interface for on-chip emulation and programming, requiring only two pins: RST/NMI/SBWTDIO (pin 16) and TEST/SBWTCK (pin 17). This 2-wire interface replaces full 4-wire JTAG, reducing PCB footprint and connector cost while supporting full read/write memory access, breakpoint setting, and real-time variable inspection during development.
Can the MSP430G2433IN20 operate from a single 1.8-V supply?
Yes, the MSP430G2433IN20 is fully specified for operation from 1.8 V to 3.6 V. At 1.8 V, it delivers 6 MHz maximum MCLK, 230 µA active current at 1 MHz, and retains full functionality of ADC, timers, USCI modules, and capacitive-touch I/O. Brownout detection remains active across the entire voltage range to prevent undefined behavior during supply droop.
Is the MSP430G2433IN20 pin-compatible with other MSP430G2x33 variants?
Yes, the MSP430G2433IN20 is pin-compatible with other 20-pin MSP430G2x33 devices including MSP430G2533IN20 and MSP430G2333IN20 in the same PDIP package. All share identical pin functions, electrical characteristics, and timing behavior - allowing direct substitution where flash/RAM requirements align, without PCB or schematic changes.
MSP430G2433IN20 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Series:
- MSP430G2xx
- Packaging:
- Bulk
- 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:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 512 x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
MSP430G2433IN20 FAQ
1.How can I place an order for MSP430G2433IN20 through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430G2433IN20 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 MSP430G2433IN20 reliable?
The price and inventory of MSP430G2433IN20 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430G2433IN20 is usually 5 days.
3.What payment methods are accepted for MSP430G2433IN20?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430G2433IN20 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430G2433IN20?
MSP430G2433IN20 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430G2433IN20 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 MSP430G2433IN20?
For technical support, including MSP430G2433IN20 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430G2433IN20 requirements.
6.How does Aetrix verify that MSP430G2433IN20 is sourced from the original manufacturer or authorized distributors?
All MSP430G2433IN20 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 MSP430G2433IN20 meets industry standards.
7.What is the process for return or replacement of MSP430G2433IN20?
All MSP430G2433IN20 units undergo pre-shipment inspection (PSI). If there is an issue with MSP430G2433IN20, 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 MSP430G2433IN20 part is unused and in its original packaging.
Return procedure for MSP430G2433IN20:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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