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Texas Instruments MSP430A051IPM
- Part No.:
- MSP430A051IPM
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
MSP430A051IPM.pdf
- Description:
- IC MCU 16BIT 16KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,669
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Product details
Overview
MSP430A051IPM from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller featuring 60KB flash, 2KB RAM, dual USARTs, 12-bit ADC with 8 channels, two 16-bit timers (Timer_A3 and Timer_B7), and 48 general-purpose I/O pins in a 64-pin LQFP package. It operates from 1.8 V to 3.6 V and targets battery-powered sensor systems and industrial control nodes requiring sub-6 µs wake-up from standby mode.
For engineers reviewing the MSP430A051IPM datasheet, MSP430A051IPM pinout, MSP430A051IPM application, or MSP430A051IPM equivalent, this page delivers verified specifications, functional block context, validated pin functions, real-world use cases, and technically grounded alternative options - all aligned to TI's SLAS272H production data sheet (May 2018 revision).
Technical Context
The MSP430A051IPM implements a 16-bit RISC CPU with constant generators and hardware multiplier, enabling high code efficiency in ultra-low-power embedded applications. Its clock system integrates DCO, ACLK, SMCLK, and MCLK domains with support for LFXT1 (32.768 kHz watch crystal) and XT2 (up to 8 MHz standard crystal) oscillators.
Peripherals include a 12-bit ADC12 with internal reference and autoscan, two independent USARTs configurable as UART or SPI, Comparator_A, watchdog timer, and JTAG-based emulation. All peripherals are synchronized to the system clock architecture and support five low-power modes optimized for extended battery life in portable measurement devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 125-ns instruction cycle and hardware multiplier for efficient math-intensive firmware. |
| Flash / RAM | 60KB flash + 256B information memory; 2KB SRAM - sufficient for complex sensor fusion or protocol stack implementation. |
| ADC Resolution | 12-bit ADC12 with 8 input channels, <10 µs conversion time, and built-in reference - supports precision analog sensing without external components. |
| Timers | Timer_A3 (3 capture/compare registers) and Timer_B7 (7 capture/compare registers with shadow registers) - enables multi-channel PWM, input capture, and real-time event sequencing. |
| Communication | Dual USARTs (USART0 and USART1), each supporting UART or synchronous SPI - allows simultaneous host interface and peripheral daisy-chaining. |
| Supply Range | 1.8 V to 3.6 V operation - compatible with single-cell Li-ion, Li-polymer, or dual-cell alkaline power sources. |
| Low-Power Modes | Five power-saving modes including LPM3 (1.6 µA standby) and LPM4 (0.1 µA RAM retention) - extends battery life in intermittent-sampling applications. |
Pinout & Package
Package: 64-pin LQFP (10 mm × 10 mm), RoHS-compliant, with exposed thermal pad connected to DVSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0/TACLK | Timer_A clock input | Accepts external clock source for Timer_A; also functions as general-purpose I/O with interrupt capability. |
| P2.6/ADC12CLK | ADC conversion clock | Provides dedicated clock signal to ADC12 module - decouples sampling timing from system clock domain. |
| P3.5/URXD0 | USART0 receive data | UART-mode serial input for primary communication interface; supports asynchronous polling or interrupt-driven reception. |
| P3.6/UTXD1 | USART1 transmit data | Secondary UART output for isolated diagnostics, logging, or secondary host connection - no shared pins with USART0. |
| P5.7/TBOUTH | Timer_B output hold | Asserts high-impedance state on all Timer_B PWM outputs simultaneously - critical for safe motor or LED driver shutdown sequences. |
| RST/NMI | Reset / non-maskable interrupt | Active-low reset input with NMI functionality; also triggers bootloader entry when held during power-up. |
| XIN / XOUT | LFXT1 oscillator terminals | Supports 32.768 kHz watch crystal for precise real-time clock (RTC) operation and low-frequency timing stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low active current | 280 µA at 1 MHz and 2.2 V - minimizes energy draw during sensor acquisition and processing bursts. |
| Sub-6 µs wake-up time | From LPM3 to active mode in <6 µs - enables rapid response to external interrupts while maintaining deep sleep efficiency. |
| Integrated ADC reference | Built-in 1.5 V or 2.5 V reference eliminates need for external voltage reference ICs in most analog front-end designs. |
| On-chip comparator | Comparator_A with programmable hysteresis and output routing to timers - supports zero-crossing detection and threshold-triggered events. |
| Secure programming | Programmable security fuse prevents unauthorized read-out of flash contents - essential for firmware IP protection in deployed devices. |
Applications
| Smart Utility Metering | Industrial Sensor Node |
|---|---|
|
Use Scenario: Battery-powered electricity/water/gas meter collecting pulse counts, temperature, and pressure at 15-minute intervals. IC Role / Device Role / Timing Role: Primary MCU managing sensor interfaces, RTC-based scheduling, secure data logging, and RF/PLC communication via USART1. Use Value: 0.1 µA off-mode current and 60KB flash enable 10+ year battery life and firmware-over-the-air update capability. |
Use Scenario: DIN-rail mounted environmental monitor measuring humidity, CO₂, and ambient light in HVAC control cabinets. IC Role / Device Role / Timing Role: Central controller acquiring analog sensor data via ADC12, performing local compensation algorithms, and transmitting results over RS-485 via USART0. Use Value: Dual USARTs allow concurrent sensor bus management and upstream communication without software multiplexing overhead. |
| Portable Handheld Tester | Asset Tracking Beacon |
|
Use Scenario: Field technician tool measuring resistance, continuity, and diode drop with auto-ranging and LCD display. IC Role / Device Role / Timing Role: Mixed-signal processor driving segmented LCD, executing calibration routines, and interpreting button inputs with low-latency GPIO response. Use Value: 48 GPIOs with interrupt-on-change support simplify direct keypad and display interface, reducing BOM count. |
Use Scenario: GPS-denied indoor asset tag reporting location via BLE beaconing and motion-triggered wake-up. IC Role / Device Role / Timing Role: Ultra-low-power coordinator sampling accelerometer (via P6.x analog inputs), managing BLE subsystem timing, and controlling sleep/wake cycles. Use Value: 1.6 µA standby current and fast wake-up ensure >3-year coin-cell operation while maintaining responsive motion detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F149IPM | Identical flash/RAM, same pinout, identical peripheral set - fully pin- and code-compatible replacement. | No functional deviation; supports identical firmware and PCB layout. | Select when exact TI production part number compliance is required for legacy qualification or documentation traceability. |
| MSP430F1491IRTD | VQFN-64 (9 mm × 9 mm) package; same electrical specs but smaller footprint and different thermal pad configuration. | Suitable for space-constrained designs where LQFP rework or thermal mass is undesirable. | Choose for new designs prioritizing board area reduction and automated assembly yield over hand-soldering serviceability. |
Compared with MSP430A051IPM, MSP430F149IPM offers identical functionality in the same LQFP package for seamless drop-in replacement, while MSP430F1491IRTD provides identical performance in a smaller VQFN package - enabling compact, high-density layouts without sacrificing ultra-low-power operation or peripheral capability.
Availability
MSP430A051IPM is available at Aetrix Electronics and suitable for smart utility metering, industrial sensor nodes, and portable handheld testers requiring stable component supply, long-term lifecycle assurance, and TI-qualified ultra-low-power performance.
Supply support for MSP430A051IPM 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 delivering analog, embedded processing, and connectivity solutions with emphasis on energy efficiency, reliability, and system-level integration.
The MSP430™ family was designed specifically for ultra-low-power sensing, measurement, and control applications - combining optimized architecture, intelligent peripherals, and aggressive power gating to maximize battery life in portable and remote systems.
FAQ
What is the maximum operating frequency of the MSP430A051IPM?
The MSP430A051IPM does not specify a maximum system clock frequency in its datasheet; instead, it guarantees correct operation up to 1 MHz in active mode at 2.2 V (280 µA typical). Its digitally controlled oscillator (DCO) is calibrated to support stable operation across the full 1.8–3.6 V supply range, with higher frequencies achievable under specific voltage and temperature conditions - always verify timing margins using the DCO frequency characterization curves in Section 5.18 of the SLAS272H datasheet. The MSP430A051IPM relies on architectural efficiency rather than raw clock speed for performance.
Does the MSP430A051IPM support hardware UART autobaud detection?
No, the MSP430A051IPM does not implement hardware UART autobaud detection. Its USART modules operate in fixed-baud-rate mode, requiring preconfigured BRCLK and modulation settings. Autobaud must be implemented in firmware using timer capture on the URXD line to measure start-bit duration - a technique documented in TI application report SLAA272. This limitation applies identically across all MSP430F14x and MSP430F14x1 variants, including the MSP430A051IPM.
Can the MSP430A051IPM's ADC12 perform simultaneous sampling on multiple channels?
No, the MSP430A051IPM's ADC12 module does not support true simultaneous sampling. It uses a single sample-and-hold circuit and sequential conversion across up to 8 channels in autoscan mode, with minimum inter-channel delay governed by ADC12CLK period and conversion timing parameters (tCONVERT ≤ 13 × ADC12CLK per channel). Simultaneous sampling requires external analog front-end circuitry or a different ADC architecture - the MSP430A051IPM achieves high effective throughput via fast conversion (<10 µs) and DMA-triggered burst sequences.
Is the MSP430A051IPM pin-compatible with the MSP430F133 or MSP430F135?
No, the MSP430A051IPM is not pin-compatible with MSP430F133 or MSP430F135. While all three share the 64-pin LQFP package, their peripheral mappings differ significantly: MSP430F13x devices have only one USART and Timer_B3 (vs. Timer_B7), and assign different functions to pins P3.6/P3.7, P4.3–P4.6, and P5.0–P5.3. These differences are explicitly documented in Tables 4-1 and 4-2 of SLAS272H. Using MSP430A051IPM in an MSP430F133/F135 design would require PCB redesign and firmware adaptation.
What debug interface does the MSP430A051IPM support?
The MSP430A051IPM supports JTAG-based debugging and programming via the standard 4-wire interface (TCK, TMS, TDI/TCLK, TDO/TDI) on pins 57, 56, 55, and 54 respectively. It does not support Spy-Bi-Wire (SBW) - a 2-wire alternative used on later MSP430 generations. Debug access requires a TI MSP-FET or compatible JTAG emulator; the device also supports bootloader (BSL) entry via RST/NMI and UART for field firmware updates without JTAG hardware.
MSP430A051IPM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 64-LQFP
- Series:
- MSP430x1xx
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430
- Core Size:
- 16-Bit
- Speed:
- 8MHz
- Connectivity:
- SPI, UART/USART
- Peripherals:
- POR, PWM, WDT
- Number of I/O:
- 48
- Program Memory Size:
- 16KB (16K x 8 + 256B)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 512 x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 8x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430A051IPM FAQ
1.How can I place an order for MSP430A051IPM through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430A051IPM 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 MSP430A051IPM reliable?
The price and inventory of MSP430A051IPM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430A051IPM is usually 5 days.
3.What payment methods are accepted for MSP430A051IPM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430A051IPM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430A051IPM?
MSP430A051IPM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430A051IPM 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 MSP430A051IPM?
For technical support, including MSP430A051IPM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430A051IPM requirements.
6.How does Aetrix verify that MSP430A051IPM is sourced from the original manufacturer or authorized distributors?
All MSP430A051IPM 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 MSP430A051IPM meets industry standards.
7.What is the process for return or replacement of MSP430A051IPM?
All MSP430A051IPM units undergo pre-shipment inspection (PSI). If there is an issue with MSP430A051IPM, 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 MSP430A051IPM part is unused and in its original packaging.
Return procedure for MSP430A051IPM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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