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Texas Instruments MSP430G2533IPW20R
- Part No.:
- MSP430G2533IPW20R
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MSP430G2533IPW20R.pdf
- Description:
- IC MCU 16BIT 16KB FLASH 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,798
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Product details
Overview
MSP430G2533IPW20R from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller featuring 16 KB Flash, 512 B RAM, a 10-bit 200-ksps ADC with 8 channels, two 16-bit Timer_A modules, USCI (UART/I²C/SPI), and capacitive-touch I/O capability - deployed in battery-powered sensor nodes and portable instrumentation requiring sub-1 µs wake-up and <0.1 µA off-mode retention.
For engineers reviewing the MSP430G2533IPW20R datasheet, MSP430G2533IPW20R pinout, MSP430G2533IPW20R application, or MSP430G2533IPW20R equivalent, key selection criteria include calibrated DCO frequency stability across 1.8–3.6 V, Spy-Bi-Wire debug interface compatibility, TSSOP-20 package footprint constraints, and ADC reference configuration options (internal/external/VREF±).
Technical Context
The MSP430G2533IPW20R implements a 16-bit RISC CPU with constant generators and six operating modes (including LPM4 at 0.1 µA), enabling deterministic low-power scheduling in embedded sensing systems. Its clock system integrates a digitally controlled oscillator (DCO) with four factory-calibrated frequencies (1/8/12/16 MHz), internal VLO, and external crystal support (32 kHz or high-frequency).
Peripherals are tightly coupled to power management: Timer_A modules support capture/compare with interrupt-driven event handling; USCI_A0 and USCI_B0 provide asynchronous/synchronous serial communication with LIN-compliant UART auto-baud detection; and the 10-bit ADC includes sample-and-hold, autoscan, and built-in temperature sensor - all functional within the same 20-pin TSSOP footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 62.5-ns instruction cycle; enables compact, deterministic firmware for real-time sensor processing. |
| Flash / RAM | 16 KB Flash (in-system programmable, no external VPP); 512 B RAM - sufficient for standalone firmware with ADC buffering and USCI protocol stacks. |
| ADC Resolution & Speed | 10-bit SAR ADC, 200 kSps max, 8-channel autoscan - supports simultaneous multi-sensor sampling in portable data loggers. |
| Power Modes | Active mode: 230 µA @ 1 MHz, 2.2 V; Standby: 0.5 µA; Off mode (RAM retention): 0.1 µA - extends coin-cell life to years in intermittent-read applications. |
| Wake-up Time | <1 µs from LPM3/LPM4 to active mode - critical for responsive wake-on-event designs like tamper detection or motion-triggered telemetry. |
| Communication Interfaces | USCI_A0 (UART/LIN/IrDA/SPI) + USCI_B0 (SPI/I²C) - enables dual-protocol connectivity (e.g., UART to host + I²C to local sensors) without external logic. |
| Supply Voltage Range | 1.8 V to 3.6 V - compatible with single-cell Li-ion, LiFePO₄, and alkaline battery systems without regulation overhead. |
Pinout & Package
TSSOP-20 package (6.5 mm × 4.4 mm, 0.65 mm pitch), lead-free, RoHS-compliant. Pin 1 marked by dot; exposed thermal pad not present in TSSOP variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DVCC) | Digital supply voltage | Primary 1.8–3.6 V digital rail; decoupling capacitor required within 10 mm of pin for stable core operation. |
| 2 (P1.0/TA0CLK/ACLK/A0) | Multi-function I/O | Configurable as timer clock input, ACLK output, or ADC channel 0 - enables synchronous sampling or low-jitter timing reference. |
| 5 (P1.3/ADC10CLK/VREF-/VEREF-/A3) | ADC reference & analog input | Supplies negative reference (VREF−) or analog input A3; supports ratiometric measurements when paired with VREF+ on P1.4. |
| 6 (P1.4/SMCLK/VREF+/VEREF+/A4) | System clock & ADC reference | Outputs SMCLK or supplies positive reference (VREF+) for ADC; allows internal 1.5 V reference or external precision reference selection. |
| 16 (RST/NMI/SBWTDIO) | Reset & debug I/O | Active-low reset with non-maskable interrupt capability; doubles as Spy-Bi-Wire data I/O for in-circuit programming and debugging. |
| 17 (TEST/SBWTCK) | Debug clock input | Provides Spy-Bi-Wire clock during programming; must be pulled high via 4.7 kΩ resistor in production to prevent unintended entry into test mode. |
| 19 (XIN/P2.6/TA0.1) | Clock input & timer I/O | Accepts 32 kHz crystal or external clock source; also serves as Timer0_A compare output - enables dual-use pin optimization. |
| 20 (DVSS) | Digital ground | Common return path for digital circuitry; requires low-impedance connection to PCB ground plane to minimize noise coupling into ADC. |
Key Features
| Feature | Design Value |
|---|---|
| Calibrated DCO frequencies | Four factory-trimmed DCO settings (1/8/12/16 MHz) eliminate need for external crystal in cost-sensitive applications while maintaining ±3% accuracy over voltage/temperature. |
| Capacitive-touch I/O | Up to 24 pins support CSD (Capacitive Sigma-Delta) sensing - enables button/slider interfaces with <1 µA standby current and no external RC components. |
| Brownout detector (BOR) | Programmable threshold (1.6–2.7 V) with reset and interrupt options - prevents erratic execution during battery sag or cold-start conditions. |
| On-chip emulation | Spy-Bi-Wire interface uses only two pins (SBWTDIO + SBWTCK) for full debug, flash programming, and boundary scan - reduces test fixture complexity. |
| Programmable code protection | Security fuse disables JTAG/Spy-Bi-Wire access after programming - protects firmware IP in production units without requiring external encryption hardware. |
Applications
| Smart Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered environmental sensor collecting temperature, humidity, and CO₂ data every 5 minutes, transmitting via UART to gateway. IC Role / Device Role / Timing Role: Central controller managing ADC sampling, SPI communication with sensor ICs, UART transmission, and deep-sleep scheduling. Use Value: 0.1 µA off-mode current extends CR2032 battery life beyond 3 years; integrated ADC reference eliminates external voltage reference IC. |
Use Scenario: Handheld pulse oximeter acquiring analog photodiode signals, computing SpO₂, and displaying results on segmented LCD. IC Role / Device Role / Timing Role: Signal acquisition MCU performing synchronized dual-channel ADC sampling, digital filtering, and LCD segment drive via GPIO. Use Value: Sub-1 µs wake-up ensures immediate response to user button press; 10-bit ADC resolution meets FDA Class II accuracy requirements for clinical-grade readings. |
| Industrial Control Panel | Energy Harvesting IoT Endpoint |
Use Scenario: DIN-rail mounted HMI panel monitoring relay status, reading analog 4–20 mA inputs, and logging events to EEPROM. IC Role / Device Role / Timing Role: Real-time I/O manager handling analog input conditioning, discrete I/O scanning, and non-volatile storage via SPI flash. Use Value: Dual USCI modules enable concurrent Modbus RTU (UART) and local sensor bus (I²C); robust ESD rating (±1000 V HBM) withstands industrial EMI. |
Use Scenario: Solar-powered soil moisture sensor using ambient light harvesting, waking hourly to measure capacitance and transmit via LoRaWAN. IC Role / Device Role / Timing Role: Ultra-low-power system orchestrator managing energy buffer control, ADC acquisition, and RF module handshaking. Use Value: 0.5 µA standby mode minimizes quiescent drain on supercapacitor; internal VLO provides reliable timing when solar input is absent. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430G2433IPW20R | 8 KB Flash, 512 B RAM, identical peripherals and pinout - lacks 16 KB program memory headroom. | Suitable for simpler sensor firmware without complex protocol stacks or large lookup tables. | Select when firmware size remains under 8 KB and cost sensitivity outweighs future scalability needs. |
| MSP430FR2433IPW20R | Ferroelectric RAM (FRAM) instead of Flash; 15 KB FRAM, 2 KB RAM; higher write endurance and lower active current (112 µA @ 1 MHz). | Preferred for frequent data logging or field firmware updates where Flash wear-out or erase latency is unacceptable. | Choose for applications demanding >10¹⁴ write cycles or sub-millisecond nonvolatile store operations. |
Compared with MSP430G2433IPW20R, the MSP430G2533IPW20R provides 2× Flash capacity for complex sensor fusion algorithms; versus MSP430FR2433IPW20R, it trades FRAM endurance for lower unit cost and proven Flash reliability in static firmware deployments.
Availability
MSP430G2533IPW20R is available at Aetrix Electronics and suitable for smart sensor nodes, portable medical monitors, industrial control panels, and energy harvesting IoT endpoints requiring stable component supply, long-term lifecycle support, and consistent TSSOP-20 packaging.
Supply support for MSP430G2533IPW20R 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 targets cost-sensitive, battery-operated applications requiring high integration, minimal external components, and guaranteed low-power performance - especially in sensor interface, capacitive touch, and portable instrumentation.
FAQ
What is the maximum system clock frequency supported by the MSP430G2533IPW20R?
The MSP430G2533IPW20R supports up to 16 MHz MCLK when VCC ≥ 3.3 V, 12 MHz at 2.7 V, and 6 MHz at 1.8 V - with all frequencies factory-calibrated in the DCO. This allows precise timing control without external crystals in many applications, and the MSP430G2533IPW20R maintains stable operation across its full 1.8–3.6 V supply range.
Does the MSP430G2533IPW20R support capacitive touch sensing on all I/O pins?
No - the MSP430G2533IPW20R supports capacitive touch on up to 24 I/O pins, but only those explicitly designated in the device-specific datasheet (e.g., P1.x and P2.x pins). Port P3 is not available in the TSSOP-20 package, limiting usable touch-capable pins to 16 in this variant. The MSP430G2533IPW20R's integrated CSD engine requires no external components and operates in all low-power modes.
Can the MSP430G2533IPW20R ADC use an external reference voltage?
Yes - the MSP430G2533IPW20R ADC supports external reference inputs via dedicated pins: VREF+ (P1.4) and VREF− (P1.3), enabling ratiometric or precision absolute measurements. When used with external references, the MSP430G2533IPW20R achieves improved linearity and reduced drift compared to internal 1.5 V reference, especially in varying temperature environments.
Is the MSP430G2533IPW20R pin-compatible with other devices in the MSP430G2x33 family?
Yes - the MSP430G2533IPW20R shares identical pinout and electrical characteristics with MSP430G2433IPW20R and MSP430G2333IPW20R in the TSSOP-20 package. Firmware and PCB layouts are interchangeable across these variants, allowing scalable memory selection without hardware redesign. The MSP430G2533IPW20R differs only in Flash size (16 KB vs. 8 KB or 4 KB) and associated calibration data.
What debug interface does the MSP430G2533IPW20R use, and what pins are required?
The MSP430G2533IPW20R uses the two-wire Spy-Bi-Wire (SBW) interface for programming and debugging, requiring only pins 16 (RST/NMI/SBWTDIO) and 17 (TEST/SBWTCK). This eliminates the need for full 4-wire JTAG, simplifying PCB layout and test fixture design. The MSP430G2533IPW20R supports full-speed emulation, flash programming, and real-time variable inspection via standard TI tools like MSP-FET and Code Composer Studio.
MSP430G2533IPW20R 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:
- 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:
- 16KB (16K 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:
- Surface Mount
- Supplier Device Package:
MSP430G2533IPW20R FAQ
1.How can I place an order for MSP430G2533IPW20R through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430G2533IPW20R 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 MSP430G2533IPW20R reliable?
The price and inventory of MSP430G2533IPW20R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430G2533IPW20R is usually 5 days.
3.What payment methods are accepted for MSP430G2533IPW20R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430G2533IPW20R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430G2533IPW20R?
MSP430G2533IPW20R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430G2533IPW20R 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 MSP430G2533IPW20R?
For technical support, including MSP430G2533IPW20R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430G2533IPW20R requirements.
6.How does Aetrix verify that MSP430G2533IPW20R is sourced from the original manufacturer or authorized distributors?
All MSP430G2533IPW20R 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 MSP430G2533IPW20R meets industry standards.
7.What is the process for return or replacement of MSP430G2533IPW20R?
All MSP430G2533IPW20R units undergo pre-shipment inspection (PSI). If there is an issue with MSP430G2533IPW20R, 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 MSP430G2533IPW20R part is unused and in its original packaging.
Return procedure for MSP430G2533IPW20R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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