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Texas Instruments MSP430F156IRTDT
- Part No.:
- MSP430F156IRTDT
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 64-VFQFN Exposed Pad
- Datasheet:
-
MSP430F156IRTDT.pdf
- Description:
- IC MCU 16BIT 24KB FLASH 64VQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MSP430F156IRTDT from Texas Instruments is an ultralow-power 16-bit mixed-signal microcontroller with 24KB+256B flash memory, 1KB RAM, dual 12-bit DACs, 12-bit ADC with autoscan, two 16-bit timers (Timer_A3 and Timer_B3), USART0 supporting UART/SPI/I²C, and integrated DMA controller. It operates from 1.8 V to 3.6 V and targets battery-powered sensor systems and portable instrumentation.
For engineers reviewing the MSP430F156IRTDT datasheet, MSP430F156IRTDT pinout, MSP430F156IRTDT application, or MSP430F156IRTDT equivalent, key selection criteria include its 64-pin QFN (RTD) package, LPM4 standby current of 0.2 μA, 125-ns instruction cycle, dual USART capability (USART0 only), and Timer_B3 with three capture/compare registers - all confirmed for this exact variant.
Technical Context
The MSP430F156IRTDT implements a 16-bit RISC CPU with seven addressing modes and constant generators for high code efficiency. Its clock system includes digitally controlled oscillator (DCO), ACLK, SMCLK, and MCLK, enabling wake-up from LPM4 in under 6 μs.
It integrates analog peripherals including a 12-bit ADC with internal reference and sample-and-hold, dual voltage-output 12-bit DACs (DAC0/DAC1 on P6.6/P6.7), and a comparator. Digital peripherals include three-channel DMA, watchdog timer, and JTAG-based debugging via TCK/TMS/TDI/TDO pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 125-ns instruction cycle; register-to-register operations execute in one CPU clock cycle. |
| Flash / RAM | 24KB+256B flash program memory + 1KB RAM; supports in-system programming via BSL or JTAG. |
| ADC | 12-bit SAR ADC with 8-channel input (A0–A7), internal reference, sample-and-hold, and autoscan mode. |
| DAC | Dual 12-bit voltage-output DACs (DAC0/DAC1); outputs mapped to P6.6 and P6.7 respectively. |
| Timers | Timer_A3 with three capture/compare registers; Timer_B3 with three capture/compare registers and shadow registers. |
| Communication | USART0 supporting asynchronous UART, synchronous SPI, and I²C protocols; no USART1 (confirmed absent in F15x series). |
| Power Modes | Five low-power modes; LPM4 draws 0.2 μA (RAM retention), with wake-up time <6 μs to active mode. |
Pinout & Package
Package: 64-pin QFN (RTD), exposed thermal pad connected to DVSS per TI recommendation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST/NMI | Reset / Nonmaskable Interrupt Input | Active-low reset pin; also serves as NMI input and BSL entry trigger. |
| TCK / TMS / TDI/TCLK / TDO/TDI | JTAG Test Interface | Four-pin boundary-scan interface for programming, emulation, and debug; TDI/TCLK shares pin function. |
| P1.0–P1.7, P2.0–P2.7, P3.0–P3.7, P4.0–P4.7, P5.0–P5.7, P6.0–P6.7 | General-Purpose I/O Ports | 48 total GPIO pins with interrupt capability; multiple pins support peripheral functions (e.g., TA0, TB0, URXD0, UTXD0, A0–A7, DAC0/DAC1). |
| XIN / XOUT | XT1 Crystal Oscillator | Connects to low-frequency crystal (e.g., 32.768 kHz) for ACLK generation. |
| XT2IN / XT2OUT | XT2 Crystal Oscillator | Supports high-frequency crystal (up to 8 MHz) for SMCLK/MCLK; not present in all F15x configurations but pin-assigned. |
| VREF+ / VREF− / VeREF+ | ADC/DAC Reference | VREF+ outputs internal 2.5V reference; VREF− is common negative terminal; VeREF+ accepts external reference up to DVCC. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow-Power Operation | 0.2 μA in LPM4 (RAM retention) enables multi-year battery life in remote sensors and metering devices. |
| Dual 12-Bit DAC Outputs | Simultaneous voltage-mode analog outputs on P6.6 (DAC0) and P6.7 (DAC1) support closed-loop control and waveform generation. |
| Integrated 12-Bit ADC with Autoscan | Hardware-accelerated sequential conversion across up to 8 analog inputs without CPU intervention, reducing firmware overhead. |
| Three-Channel DMA Controller | Enables zero-CPU data transfers between peripherals (e.g., ADC → RAM, USART → RAM), critical for real-time data acquisition. |
| Bootstrap Loader (BSL) | UART-based in-field firmware update using P1.1 (TX) and P2.2 (RX); password-protected and requires no external programming voltage. |
Applications
| Portable Gas Sensor Node | Industrial Temperature Transmitter |
|---|---|
Use Scenario: Battery-powered handheld gas detector acquiring analog signals from electrochemical sensors and driving local display/LED alerts. IC Role / Device Role / Timing Role: Central MCU managing ADC sampling, DAC-based bias voltage generation, UART communication to host, and ultra-low-power sleep scheduling. Use Value: 0.2 μA LPM4 current extends AA battery life beyond 5 years; dual DACs precisely set sensor bias voltages independent of CPU load. | Use Scenario: DIN-rail mounted 4–20 mA temperature transmitter interfacing RTD/thermocouple sensors and communicating via HART protocol over UART. IC Role / Device Role / Timing Role: Signal conditioner and protocol handler: digitizes analog sensor output, computes linearization, generates 4–20 mA loop current via external DAC, and manages HART FSK modulation timing. Use Value: Integrated 12-bit ADC with internal reference eliminates external precision reference IC; USART0 supports both UART (HART) and SPI (external DAC interface) on shared pins. |
| Smart Water Meter Interface | Low-Power Data Logger |
Use Scenario: Ultrasonic flow meter module capturing pulse train inputs, computing flow rate, storing hourly readings, and transmitting via NB-IoT modem. IC Role / Device Role / Timing Role: Flow computation engine and nonvolatile data manager: processes timer-captured pulses, executes calibration algorithms, writes to flash info segments, and controls modem power sequencing. Use Value: 24KB flash accommodates firmware + calibration tables; 1KB RAM supports floating-point math buffers; LPM3 (1.1 μA) enables long idle periods between measurements. | Use Scenario: Environmental monitoring node logging temperature, humidity, and light intensity at 10-minute intervals using coin-cell battery. IC Role / Device Role / Timing Role: Autonomous logger: wakes on RTC alarm, reads sensors via ADC, stores timestamped values in RAM, and returns to LPM4 after write completion. Use Value: Wake-up from LPM4 in <6 μs minimizes active time; integrated DCO ensures accurate timing without external crystal for basic logging; 256B info flash stores unique device ID and calibration offsets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F155IRTDT | 16KB+256B flash, 512B RAM; identical peripherals and pinout; lower memory density. | Suitable where firmware footprint <16KB and RAM usage <512B; same power/performance profile. | Select when cost sensitivity outweighs memory headroom; software-compatible with MSP430F156IRTDT within memory limits. |
| MSP430F157IRTDT | 32KB+256B flash, 1KB RAM; identical peripherals and pinout; higher flash capacity. | Required for larger firmware (e.g., BLE stack integration, advanced signal processing) while retaining same I/O and analog resources. | Choose when future firmware expansion or feature-rich applications demand >24KB flash; drop-in replacement with no layout change. |
Compared with MSP430F155IRTDT, the MSP430F156IRTDT provides 50% more flash for complex sensor fusion algorithms; compared with MSP430F157IRTDT, it offers optimal balance of memory, cost, and power for mid-tier portable instrumentation without over-provisioning.
Availability
MSP430F156IRTDT is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, smart utility meters, and battery-powered data loggers requiring stable component supply and long-term lifecycle support.
Supply support for MSP430F156IRTDT 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 personal electronics markets.
The MSP430F15x series is part of TI's ultralow-power MCU portfolio designed specifically for battery-operated measurement and sensing applications where extended runtime and precision analog integration are critical.
FAQ
What is the maximum operating frequency of the MSP430F156IRTDT?
The MSP430F156IRTDT supports a maximum MCLK frequency of 8 MHz using the internal DCO or external XT2 oscillator. Its 125-ns instruction cycle time corresponds to 8 MHz operation, and all timing specifications-including ADC conversion and timer resolution-are validated at this speed. The device does not require external clock circuitry to achieve full performance, as the DCO is factory-trimmed and software-tunable.
Does the MSP430F156IRTDT support I²C communication?
Yes, the MSP430F156IRTDT supports I²C communication via USART0 configured in I²C mode, using P3.1 (SDA) and P3.3 (SCL) pins. This capability is explicitly documented in the SLAS368G datasheet for the F15x family. The MSP430F156IRTDT does not include a dedicated hardware I²C peripheral, but USART0's I²C mode provides full master/slave functionality compliant with standard I²C protocol timing requirements.
How many capture/compare registers does Timer_B have on the MSP430F156IRTDT?
The MSP430F156IRTDT implements Timer_B3, which has three capture/compare registers (TBCCR0, TBCCR1, TBCCR2) and associated shadow registers. This is confirmed by the functional block diagram and terminal function table in SLAS368G, distinguishing it from the F16x/F161x families that use Timer_B7. All three registers support independent PWM generation, input capture, and output compare functions with interrupt capability.
Is the MSP430F156IRTDT pin-compatible with the MSP430F169IRTDT?
No, the MSP430F156IRTDT is not pin-compatible with the MSP430F169IRTDT. Although both use the 64-pin RTD package, the F169 includes USART1 and Timer_B7 with seven capture/compare registers-functions assigned to pins (e.g., P3.6/P3.7, P4.3–P4.6, P5.0–P5.3) that are general-purpose I/O or unused on the F156. These pins lack the required alternate functions on the MSP430F156IRTDT, making direct substitution impossible without PCB revision.
What development tools are supported for programming the MSP430F156IRTDT?
The MSP430F156IRTDT supports programming via JTAG using the MSP-FET430UIF (USB) or MSP-FET430PIF (parallel port) debuggers, and in-system via the UART-based Bootstrap Loader (BSL) using P1.1 and P2.2. TI's Code Composer Studio and naken430loader are fully compatible. The device includes an Embedded Emulation Module (EEM) for real-time debugging, breakpoint setting, and memory inspection without halting peripheral operation.
MSP430F156IRTDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 64-VFQFN Exposed Pad
- Series:
- MSP430x1xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPU16
- Core Size:
- 16-Bit
- Speed:
- 8MHz
- Connectivity:
- I2C, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, PWM, WDT
- Number of I/O:
- 48
- Program Memory Size:
- 24KB (24K x 8 + 256B)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 8x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430F156IRTDT FAQ
1.How can I place an order for MSP430F156IRTDT through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F156IRTDT 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 MSP430F156IRTDT reliable?
The price and inventory of MSP430F156IRTDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F156IRTDT is usually 5 days.
3.What payment methods are accepted for MSP430F156IRTDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F156IRTDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F156IRTDT?
MSP430F156IRTDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F156IRTDT 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 MSP430F156IRTDT?
For technical support, including MSP430F156IRTDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F156IRTDT requirements.
6.How does Aetrix verify that MSP430F156IRTDT is sourced from the original manufacturer or authorized distributors?
All MSP430F156IRTDT 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 MSP430F156IRTDT meets industry standards.
7.What is the process for return or replacement of MSP430F156IRTDT?
All MSP430F156IRTDT units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F156IRTDT, 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 MSP430F156IRTDT part is unused and in its original packaging.
Return procedure for MSP430F156IRTDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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