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Texas Instruments MSP430F157IRTDR
- Part No.:
- MSP430F157IRTDR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 64-VFQFN Exposed Pad
- Datasheet:
-
MSP430F157IRTDR.pdf
- Description:
- IC MCU 16BIT 32KB FLASH 64VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,350
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Product details
Overview
MSP430F157IRTDR from Texas Instruments is an ultralow-power 16-bit mixed-signal microcontroller featuring 32KB+256B flash memory, 1KB RAM, a 12-bit ADC with internal reference and autoscan, dual 12-bit DACs, two 16-bit timers (Timer_A3 and Timer_B3), USART0 supporting UART/SPI/I²C, and three-channel DMA. It operates from 1.8 V to 3.6 V and targets battery-powered sensor systems and portable measurement devices.
For engineers reviewing the MSP430F157IRTDR datasheet, MSP430F157IRTDR pinout, MSP430F157IRTDR application, or MSP430F157IRTDR equivalent, key selection considerations include its 64-pin QFN (RTD) package, LPM4 standby current of 0.2 μA, 125-ns instruction cycle time, dual USART capability (USART0 only), and absence of USART1 and extended Timer_B7 channels found in MSP430F16x variants.
Technical Context
The MSP430F157IRTDR implements a 16-bit RISC CPU with seven addressing modes, constant generators, and 16 general-purpose registers 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.
Peripherals are memory-mapped and fully accessible via standard instructions. The device supports JTAG-based debugging via TCK/TMS/TDI/TDO pins and includes a bootstrap loader (BSL) accessible through P1.1 (TX) and P2.2 (RX), with password-protected flash programming over UART.
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. |
| Memory | 32KB+256B flash (main + info memory), 1KB RAM; supports in-system programming via JTAG or BSL UART interface. |
| ADC | 12-bit SAR ADC with 8 input channels, internal reference, sample-and-hold, and autoscan - enables continuous sensor data acquisition without CPU intervention. |
| DAC | Dual 12-bit voltage-output DACs (DAC0/DAC1 on P6.6/P6.7); synchronized operation supports precise analog waveform generation. |
| Timers | Timer_A3 with three capture/compare registers; Timer_B3 with three capture/compare registers and shadow registers - suitable for PWM, input capture, and interval timing. |
| Communication | USART0 supporting asynchronous UART, synchronous SPI, and I²C modes; no USART1 - limits dual-serial-channel applications. |
| Power Modes | Five low-power modes (LPM0–LPM4); LPM4 draws 0.2 μA with RAM retention - optimized for multi-year battery life in remote sensors. |
Pinout & Package
Package: 64-pin QFN (RTD), thermally enhanced, exposed pad connected to DVSS per TI recommendation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST/NMI | Reset / Nonmaskable Interrupt Input | Active-low reset initiation; also serves as NMI input or BSL entry trigger when held low during power-up. |
| P1.0/TACLK | Timer_A Clock Input | External clock source for Timer_A; configurable as general-purpose I/O when timer not in use. |
| P2.6/ADC12CLK/DMAE0 | ADC Conversion Clock / DMA Trigger | Provides dedicated clock for ADC12; also acts as external trigger for DMA channel 0 - enables autonomous sensor data transfer. |
| P3.1/SIMO0/SDA | USART0 SPI Master-Out / I²C Data | Shared function pin: SPI data output in master mode; bidirectional I²C data line - requires software-controlled mode switching. |
| P6.6/A6/DAC0 | Analog Input / DAC Output | Configurable as ADC input channel A6 or DAC0 voltage output - supports mixed-signal feedback loops and calibration signals. |
| TCK/TMS/TDI/TDO | JTAG Test Interface | Four-pin boundary-scan interface for programming, emulation, and real-time debugging - essential for production firmware validation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow-Power Operation | 0.2 μA in LPM4 (RAM retention) and 330 μA active at 1 MHz/2.2 V - extends coin-cell battery life to >5 years in periodic-sensing applications. |
| Integrated Analog Peripherals | Single-chip solution with 12-bit ADC, dual 12-bit DACs, and comparator - eliminates need for external signal-conditioning ICs in compact designs. |
| Three-Channel DMA | Enables background data movement between peripherals (e.g., ADC → RAM, RAM → DAC) without CPU involvement - reduces active time and power consumption. |
| Hardware Multiplier (MPY) | Not present - distinguishes MSP430F157 from F161x series; arithmetic-intensive tasks require software implementation or optimized assembly routines. |
| Bootloader Security | Password-protected UART-based BSL allows field firmware updates without JTAG hardware - simplifies maintenance while preventing unauthorized access. |
Applications
| Wireless Sensor Node | Portable Medical Meter |
|---|---|
|
Use Scenario: Battery-powered temperature/humidity node transmitting data via sub-GHz RF transceiver every 5 minutes. IC Role / Device Role / Timing Role: Central controller managing ADC sampling, data processing, low-power sleep scheduling, and UART communication with RF module. Use Value: LPM4 current of 0.2 μA and 6-μs wake-up enable >10-year operation on CR2032; integrated ADC/DAC simplify analog front-end design. |
Use Scenario: Handheld blood glucose meter requiring precise analog measurement, LCD drive, and USB/UART data export. IC Role / Device Role / Timing Role: Main MCU handling electrochemical sensor signal conditioning (via ADC), calibration DAC outputs, and user interface timing. Use Value: Internal 12-bit ADC reference and autoscan reduce external component count; 1.8–3.6 V supply range matches single-cell Li-ion or alkaline operation. |
| Industrial Process Monitor | Smart Utility Meter Interface |
|
Use Scenario: DIN-rail mounted analog input module acquiring 4–20 mA loop signals and reporting via RS-485. IC Role / Device Role / Timing Role: Signal acquisition engine using ADC with external precision reference, isolating digital logic via optocouplers driven by GPIO. Use Value: Dual DAC outputs (P6.6/P6.7) support analog test signal generation for self-calibration; USART0 in RS-485 half-duplex mode handles protocol stack. |
Use Scenario: AMI endpoint interfacing with metrology ASIC and PLC/G3-PLC communication chip via SPI and UART. IC Role / Device Role / Timing Role: Communication bridge and local intelligence unit managing time-stamped event logging and secure firmware updates. Use Value: BSL-enabled UART update path allows remote field upgrades; 32KB flash accommodates dual-bank bootloader and encrypted application image. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F167IRTDR | Same 32KB+256B flash and 1KB RAM, but adds USART1 and Timer_B7 (7 CCRs); higher peripheral count increases code size and power in active mode. | Required for dual-serial-channel systems (e.g., simultaneous Modbus RTU + BLE UART bridge); not drop-in compatible due to additional peripheral registers. | Select MSP430F167IRTDR only if USART1 or extra Timer_B capture/compare channels are needed; otherwise MSP430F157IRTDR offers lower cost and identical core functionality. |
| MSP430F156IRTDR | 24KB+256B flash, 1KB RAM, identical peripheral set and pinout - differs only in program memory size and default interrupt vector mapping. | Suitable for smaller firmware footprints (<24 KB); retains full compatibility for applications not requiring >24 KB code space. | Choose MSP430F156IRTDR when firmware size is confirmed ≤24 KB; provides identical timing, power, and I/O behavior with reduced memory cost. |
Compared with MSP430F167IRTDR, the MSP430F157IRTDR omits USART1 and Timer_B7 channels - reducing complexity and cost for single-serial-channel designs. Against MSP430F156IRTDR, it delivers 8 KB more flash for larger algorithms or future feature expansion without changing layout or firmware architecture.
Availability
MSP430F157IRTDR is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical meters, and industrial process monitors requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MSP430F157IRTDR 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 ultralow-power microcontrollers for industrial and sensing applications.
The MSP430F157IRTDR belongs to the MSP430F15x family - designed specifically for battery-operated measurement systems where nanowatt-level standby power, fast wake-up, and integrated analog peripherals are critical.
FAQ
What is the maximum operating frequency of the MSP430F157IRTDR?
The MSP430F157IRTDR supports a maximum CPU clock frequency of 8 MHz via the DCO or external crystals. Its 125-ns instruction cycle time corresponds to an 8-MHz system clock, and all timing specifications - including ADC conversion and timer resolution - are validated up to this rate under 1.8–3.6 V supply conditions. The MSP430F157IRTDR does not require external clock multiplication to achieve full performance.
Does the MSP430F157IRTDR support I²C communication?
Yes, the MSP430F157IRTDR supports I²C communication through USART0 configured in I²C mode, using P3.1 (SDA) and P3.3 (SCL) pins. This implementation complies with standard-mode (100 kbps) I²C protocol and includes hardware address recognition and arbitration logic. The MSP430F157IRTDR does not include a dedicated I²C peripheral - all signaling is handled by the USART0 module's I²C state machine.
How much RAM is available on the MSP430F157IRTDR?
The MSP430F157IRTDR integrates 1KB of on-chip RAM, mapped from address 0x0200 to 0x05FF. This memory is accessible in all power modes except full LPM4 with RAM disabled (not default). The RAM supports byte and word access, is used for stack, variables, and DMA buffers, and retains data during LPM4 with RAM retention enabled - a key feature for low-power state preservation in the MSP430F157IRTDR.
Is the MSP430F157IRTDR pin-compatible with other MSP430F15x devices?
Yes, the MSP430F157IRTDR is fully pin-compatible with MSP430F155IRTDR and MSP430F156IRTDR in the same 64-pin QFN (RTD) package. All share identical pin functions, electrical characteristics, and memory-mapped peripheral register layouts. Firmware written for MSP430F155IRTDR or MSP430F156IRTDR runs unmodified on the MSP430F157IRTDR, leveraging its larger 32KB flash for expanded functionality.
What development tools are supported for the MSP430F157IRTDR?
The MSP430F157IRTDR is supported by Texas Instruments' MSP-FET430UIF (USB JTAG emulator), MSP-GANG430 (production programmer), and Code Composer Studio IDE. Hardware debug interfaces include full JTAG (TCK/TMS/TDI/TDO) and Spy-Bi-Wire (SBW) via TCK/TDI. The MSP430F157IRTDR also supports UART-based BSL programming using P1.1 and P2.2, enabling firmware updates without dedicated debug hardware.
MSP430F157IRTDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 64-VFQFN Exposed Pad
- Series:
- MSP430x1xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 32KB (32K 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:
MSP430F157IRTDR FAQ
1.How can I place an order for MSP430F157IRTDR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F157IRTDR 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 MSP430F157IRTDR reliable?
The price and inventory of MSP430F157IRTDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F157IRTDR is usually 5 days.
3.What payment methods are accepted for MSP430F157IRTDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F157IRTDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F157IRTDR?
MSP430F157IRTDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F157IRTDR 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 MSP430F157IRTDR?
For technical support, including MSP430F157IRTDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F157IRTDR requirements.
6.How does Aetrix verify that MSP430F157IRTDR is sourced from the original manufacturer or authorized distributors?
All MSP430F157IRTDR 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 MSP430F157IRTDR meets industry standards.
7.What is the process for return or replacement of MSP430F157IRTDR?
All MSP430F157IRTDR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F157IRTDR, 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 MSP430F157IRTDR part is unused and in its original packaging.
Return procedure for MSP430F157IRTDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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