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Texas Instruments MSP430F157IRTDT
- Part No.:
- MSP430F157IRTDT
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 64-VFQFN Exposed Pad
- Datasheet:
-
MSP430F157IRTDT.pdf
- Description:
- IC MCU 16BIT 32KB FLASH 64VQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MSP430F157IRTDT from Texas Instruments is an ultralow-power 16-bit mixed-signal microcontroller with 32KB+256B flash memory, 1KB RAM, dual 12-bit DACs, a 12-bit ADC with internal reference and autoscan, two 16-bit timers (Timer_A3 and Timer_B3), three-channel DMA, and dual USART interfaces supporting UART, SPI, and I²C modes - deployed in portable sensor systems and battery-powered industrial meters.
For engineers reviewing the MSP430F157IRTDT datasheet, MSP430F157IRTDT pinout, MSP430F157IRTDT application, or MSP430F157IRTDT equivalent, key selection criteria include its 64-pin QFN (RTD) package, 1.8–3.6 V supply range, <6 μs wake-up from standby, 330 μA active-mode current at 1 MHz/2.2 V, and support for JTAG debugging and BSL serial programming without external voltage.
Technical Context
The MSP430F157IRTDT implements a 16-bit RISC CPU with constant generators and seven addressing modes, enabling single-cycle register operations and high code efficiency. Its clock system integrates DCO, ACLK, SMCLK, and MCLK with programmable dividers and supports crystal oscillators on XT1 (XIN/XOUT) and XT2 (XT2IN/XT2OUT).
It features two independent USART modules: USART0 supports UART, SPI, and I²C; USART1 supports UART and SPI only. The device includes a hardware comparator, supply voltage supervisor with programmable level detection, brownout detector, and embedded emulation module (EEM) for real-time debugging via JTAG.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 general-purpose registers and constant generators; enables efficient C compilation and deterministic timing. |
| Flash / RAM | 32KB + 256B flash memory and 1KB RAM; sufficient for firmware with analog signal processing and communication stacks. |
| ADC/DAC | 12-bit ADC with 8-channel input, internal reference, sample-and-hold, and autoscan; dual 12-bit voltage-output DACs synchronized to timer events. |
| Timers | Timer_A3 with three capture/compare registers; Timer_B3 with three capture/compare registers and shadow registers; supports PWM, input capture, and interval timing. |
| Power Modes | One active mode and five low-power modes (LPM0–LPM4); standby current 1.1 μA, off-mode (RAM retention) 0.2 μA. |
| Communication | USART0 (UART/SPI/I²C) and USART1 (UART/SPI); supports full-duplex serial control, sensor data streaming, and I²C peripheral interfacing. |
| Package | 64-pin QFN (RTD); 9 mm × 9 mm body, 0.5 mm pitch, exposed thermal pad connected to DVSS - optimized for compact, thermally constrained PCB layouts. |
Pinout & Package
64-pin QFN (RTD) package with exposed thermal pad (connected to DVSS). Pinout validated per SLAS368G Rev. March 2011, applicable to MSP430F155/156/157 family members.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST/NMI | Reset / Nonmaskable Interrupt | Active-low reset input; also serves as NMI source and BSL entry trigger when held during power-up. |
| TCK, TMS, TDI/TCLK, TDO/TDI | JTAG Test Interface | Four-pin boundary-scan interface for programming, debugging, and fuse configuration; supports MSP-FET430UIF and MSP-GANG430. |
| 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; multiplexed with peripherals including timers, ADC, DAC, USART, and comparator functions. |
| XIN / XOUT | XT1 Crystal Oscillator | Connects to low-frequency (32.768 kHz) watch crystal for ACLK generation and real-time clock applications. |
| XT2IN / XT2OUT | XT2 Crystal Oscillator | Supports high-frequency (4–16 MHz) crystal for precise MCLK/SMCLK; not available on all variants but present in MSP430F157IRTDT per SLAS368G. |
| VREF+ / VREF− / VeREF+ | Analog Reference | Internal 1.5V/2.0V/2.5V reference output (VREF+), negative reference input (VREF−), and external reference input (VeREF+) for ADC/DAC calibration. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow-Power Operation | 330 μA active at 1 MHz/2.2 V; 1.1 μA standby; 0.2 μA RAM-retention off-mode - extends battery life in portable instrumentation. |
| Dual USART Support | USART0 handles UART, SPI, and I²C; USART1 adds second UART/SPI channel - enables simultaneous sensor communication and host interface. |
| Integrated Analog Peripherals | 12-bit ADC with autoscan across 8 channels and dual 12-bit DACs with synchronization - eliminates need for external converters in closed-loop control. |
| Hardware DMA Controller | Three-channel DMA transfers data between peripherals and memory without CPU intervention - reduces active time and improves real-time response. |
| On-Chip Debug & Programming | Embedded Emulation Module (EEM) and Bootstrap Loader (BSL) enable in-system flash programming via UART or JTAG - no external programmer required for field updates. |
Applications
| Portable Sensor Node | Industrial Data Logger |
|---|---|
Use Scenario: Battery-powered environmental sensor node measuring temperature, humidity, and pressure with local signal conditioning and wireless upload. IC Role / Device Role / Timing Role: Central controller managing ADC sampling, DAC-based sensor excitation, USART0 I²C communication with sensors, and USART1 UART transmission to BLE module. Use Value: 0.2 μA off-mode current preserves multi-year battery life; 12-bit ADC autoscan enables synchronized multi-channel acquisition without CPU overhead. | Use Scenario: DIN-rail mounted industrial logger recording analog process signals (4–20 mA, 0–10 V) at 10 Hz with timestamping and SD card storage. IC Role / Device Role / Timing Role: Main MCU executing timed ADC conversions, computing moving averages, formatting data packets, and driving SPI-based SD card interface via USART0. Use Value: Dual 12-bit DACs generate precision excitation voltages for RTD/thermocouple circuits; 1.8–3.6 V operation ensures compatibility with wide-input DC-DC supplies. |
| Handheld Meter Interface | Low-Power Motor Control |
Use Scenario: Handheld multimeter with LCD display, keypad, and auto-ranging analog front-end requiring fast wake-up and low-noise measurement. IC Role / Device Role / Timing Role: Mixed-signal processor handling front-end ADC control, DAC-based offset correction, LCD segment drive timing, and USB-to-UART bridge via USART1. Use Value: <6 μs wake-up from LPM3 enables immediate response to button press; integrated comparator supports zero-crossing detection for AC measurements. | Use Scenario: Brushless DC motor controller in cordless power tools, requiring PWM generation, current sensing, and fault protection. IC Role / Device Role / Timing Role: Real-time controller generating complementary PWM outputs via Timer_B3, sampling current shunt via ADC12, and triggering shutdown on overcurrent using comparator interrupt. Use Value: Three capture/compare registers per timer support three-phase PWM with dead-time insertion; supply voltage supervisor detects brownout before MOSFET gate driver failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F167IRTDT | Same 32KB+256B flash and 1KB RAM, but includes Timer_B7 (7 CCRs) and USART1 with full UART/SPI/I²C support - unlike MSP430F157IRTDT's USART1 limited to UART/SPI. | Required for designs needing >3 PWM outputs or I²C master/slave on second USART; higher peripheral count increases firmware complexity. | Select MSP430F167IRTDT if additional capture/compare resources or dual I²C buses are needed; otherwise MSP430F157IRTDT offers optimal cost/performance balance. |
| MSP430F156IRTDT | 24KB+256B flash and 1KB RAM; identical peripheral set and pinout - differs only in program memory size and minor timing specs. | Suitable where firmware footprint is <24 KB and future code expansion headroom is limited; same PCB layout and debug infrastructure. | Choose MSP430F156IRTDT for cost-sensitive volume production with stable, smaller firmware; MSP430F157IRTDT provides 8KB extra flash for feature-rich upgrades. |
Compared with MSP430F167IRTDT, the MSP430F157IRTDT trades Timer_B7 and enhanced USART1 functionality for lower cost and identical footprint; versus MSP430F156IRTDT, it delivers 8KB more flash without altering power profile, I/O count, or peripheral capabilities - making it ideal for firmware-scalable sensor nodes.
Availability
MSP430F157IRTDT is available at Aetrix Electronics and suitable for portable sensor systems, industrial data loggers, and handheld meter applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature ranges.
Supply support for MSP430F157IRTDT 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 low-power microcontrollers and precision analog solutions.
The MSP430F15x series was designed specifically for ultralow-power mixed-signal applications in battery-operated instrumentation, sensor networks, and energy-constrained industrial controls - emphasizing rapid wake-up, integrated analog peripherals, and robust debug infrastructure.
FAQ
What is the maximum operating frequency of the MSP430F157IRTDT?
The MSP430F157IRTDT supports a maximum MCLK frequency of 8 MHz when using the internal DCO, and up to 16 MHz with external XT2 crystal oscillator. Its 125-ns instruction cycle time corresponds to 8 MHz operation, and all timing specifications in SLAS368G are validated across the 1.8–3.6 V supply range and −40°C to 85°C ambient temperature.
Does the MSP430F157IRTDT support I²C communication on both USART modules?
No, only USART0 on the MSP430F157IRTDT supports I²C mode; USART1 is limited to UART and SPI operation per SLAS368G functional block diagrams and terminal function tables. This distinction is confirmed by absence of I²C-related bits (e.g., I2CIFG, UCTLx.I2CEN) in USART1 control registers for MSP430F15x devices.
What is the pin-compatible alternative with larger RAM for memory-intensive firmware?
The MSP430F1610IRTDT is not pin-compatible but shares the same 64-pin RTD package and core peripheral set; however, it offers 5KB RAM versus 1KB in MSP430F157IRTDT. For true pin-compatible RAM upgrade, no direct option exists within the F15x family - MSP430F157IRTDT's RAM is fixed at 1KB per datasheet memory organization table.
How is the exposed thermal pad on the MSP430F157IRTDT QFN package connected?
The exposed thermal pad on the MSP430F157IRTDT (RTD package) must be soldered to a PCB copper plane connected to DVSS, as specified in TI's packaging documentation and SLAS368G footnote on page 9. This connection provides critical thermal dissipation and electrical stability for analog sections, especially during ADC/DAC operation.
Can the MSP430F157IRTDT perform simultaneous ADC conversion and DMA transfer without CPU involvement?
Yes, the MSP430F157IRTDT supports autonomous ADC12 conversion triggered by timer events or software, with results automatically transferred to memory via dedicated DMA channel 0 (DMAE0 mapped to ADC12IFG). This allows continuous background sampling at up to 200 kSPS while CPU remains in LPM3, verified in SLAS368G section "DMA Controller" and ADC12 register descriptions.
MSP430F157IRTDT 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:
- 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:
MSP430F157IRTDT FAQ
1.How can I place an order for MSP430F157IRTDT through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F157IRTDT 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 MSP430F157IRTDT reliable?
The price and inventory of MSP430F157IRTDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F157IRTDT is usually 5 days.
3.What payment methods are accepted for MSP430F157IRTDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F157IRTDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F157IRTDT?
MSP430F157IRTDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F157IRTDT 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 MSP430F157IRTDT?
For technical support, including MSP430F157IRTDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F157IRTDT requirements.
6.How does Aetrix verify that MSP430F157IRTDT is sourced from the original manufacturer or authorized distributors?
All MSP430F157IRTDT 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 MSP430F157IRTDT meets industry standards.
7.What is the process for return or replacement of MSP430F157IRTDT?
All MSP430F157IRTDT units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F157IRTDT, 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 MSP430F157IRTDT part is unused and in its original packaging.
Return procedure for MSP430F157IRTDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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