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Texas Instruments MSP430A065IRBHR
- Part No.:
- MSP430A065IRBHR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
MSP430A065IRBHR.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,538
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Product details
Overview
MSP430A065IRBHR from Texas Instruments is an ultralow-power 16-bit RISC microcontroller featuring 4KB flash, 256B RAM, 10-bit ADC with internal reference and autoscan, Timer_A with three capture/compare registers, and integrated UART/SPI via USART0. It operates from 1.8 V to 3.6 V and supports wake-up from standby in <6 µs - ideal for battery-powered sensor nodes and portable measurement systems.
For engineers reviewing the MSP430A065IRBHR datasheet, MSP430A065IRBHR pinout, MSP430A065IRBHR application, or MSP430A065IRBHR equivalent, key selection criteria include its 32-pin QFN (RHB) package, 200 µA active current at 1 MHz/2.2 V, five low-power modes, JTAG debug support, and integrated DTC for autonomous ADC data transfer.
Technical Context
The MSP430A065IRBHR belongs to the MSP430x12x2 family and integrates a digitally controlled oscillator (DCO) enabling sub-6-µs wake-up from LPM3/LPM4. Its clock system supports ACLK (32-kHz crystal), SMCLK (DCO-derived), and MCLK (CPU clock), with configurable source selection via BCSCTL1/2 and DCOCTL registers.
It implements full USART0 hardware supporting both asynchronous UART (UTXD0/URXD0) and synchronous SPI (SIMO0/SOMI0/UCLK0/STE0) on dedicated P3 pins, alongside 22 GPIOs across P1–P3, 8-channel 10-bit ADC with VREF+/VREF− inputs, and Timer_A3 with three independent capture/compare channels and interrupt-capable overflow and compare events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 125 ns instruction cycle; register-based execution enables high code efficiency in embedded control. |
| Memory | 4KB flash + 256B RAM; supports in-system programming and BSL via UART using P1.1/P2.2. |
| ADC | 10-bit SAR ADC with 200 kSPS sample rate, internal reference, sample-and-hold, autoscan, and DTC for zero-CPU data movement. |
| Power Modes | Five software-selectable low-power modes (LPM0–LPM4); LPM4 draws only 0.1 µA with RAM retention. |
| Operating Voltage | 1.8 V to 3.6 V supply range; brownout protection ensures reliable reset during voltage sag. |
| Wake-up Time | <6 µs from standby (LPM3/LPM4) to active mode via DCO stabilization - critical for duty-cycled sensing. |
| Communication | Hardware USART0 supporting UART (P3.4/P3.5) and SPI (P3.1–P3.3/P3.0); double-buffered TX/RX reduces firmware overhead. |
Pinout & Package
Package: 32-pin QFN (RHB), 5 mm × 5 mm, exposed thermal pad (recommended connection to VSS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 30) | Supply voltage input | Primary power rail; must be decoupled near package with 100 nF ceramic capacitor. |
| VSS (Pin 1) | Ground reference | System ground return; connects to QFN thermal pad for thermal and EMI performance. |
| RST/NMI (Pin 5) | Reset / nonmaskable interrupt | Active-low reset input; also serves as NMI source for critical fault handling. |
| XIN (Pin 3) / XOUT (Pin 2) | Crystal oscillator terminals | Supports 32.768 kHz watch crystal for ACLK; requires external load capacitors per crystal spec. |
| P1.0/TACLK/ADC10CLK (Pin 21) | Timer/ADC clock input | Accepts external clock for Timer_A or ADC sampling; enables precise timing synchronization. |
| P2.4/TA2/A4/VREF+/VeREF+ (Pin 19) | Analog reference / ADC input | Provides positive reference voltage for ADC or serves as analog input channel A4. |
| P3.4/UTXD0 (Pin 13) / P3.5/URXD0 (Pin 14) | UART transmit/receive | Dedicated full-duplex UART interface; supports bootloader and host communication without GPIO bit-banging. |
| TEST (Pin 29) | JTAG test mode select | Enables JTAG debugging and programming when pulled high during power-up. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow-power operation | 200 µA active @ 1 MHz/2.2 V; 0.1 µA LPM4 with RAM retention - extends coin-cell life to years in intermittent-sensing applications. |
| Integrated data transfer controller (DTC) | Automatically moves ADC conversion results to memory without CPU intervention - frees MCU for background tasks. |
| Hardware USART0 | Single peripheral supporting UART and SPI protocols; eliminates need for external transceivers or software UART overhead. |
| Programmable security fuse | Prevents unauthorized read-out of flash contents - essential for protecting proprietary firmware in deployed devices. |
| On-chip digital-controlled oscillator (DCO) | Stabilizes in <6 µs; enables rapid wake-up from deep sleep - critical for time-sensitive event response in IoT edge nodes. |
Applications
| Wireless Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered environmental sensor collecting temperature, humidity, and motion data at 10-second intervals, transmitting via UART to BLE module. IC Role / Device Role / Timing Role: Central controller managing ADC sampling, DTC-driven data buffering, low-power scheduling, and UART handshaking with radio subsystem. Use Value: 0.1 µA LPM4 current and sub-6 µs wake-up minimize energy per measurement cycle, enabling >5-year operation on CR2032. | Use Scenario: Handheld pulse oximeter acquiring analog photodiode signals, computing SpO₂, and displaying results on LCD. IC Role / Device Role / Timing Role: Signal acquisition engine performing synchronized dual-channel 10-bit ADC conversions with internal reference and autoscan. Use Value: Integrated 10-bit ADC with DTC and internal VREF eliminates external precision references and reduces BOM count by two components. |
| Industrial Condition Monitor | Smart Utility Meter Interface |
Use Scenario: Vibration and temperature monitor mounted on motor housing, logging data to flash and triggering alerts via UART upon threshold breach. IC Role / Device Role / Timing Role: Real-time data logger using Timer_A3 for precise interval timing, flash write management, and interrupt-driven event capture. Use Value: Five low-power modes and programmable wake-up sources allow adaptive duty cycling - 99.8% sleep time under normal conditions. | Use Scenario: Sub-metering module interfacing with flow sensors and communicating consumption data to concentrator via RS-485 UART bridge. IC Role / Device Role / Timing Role: Protocol translator and sensor aggregator using USART0 in UART mode with hardware flow control (STE0 on P3.0). Use Value: Hardware UART with double-buffered TX/RX ensures glitch-free 9600–115.2 kbps communication without CPU polling or DMA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultralow-power mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F1232IRHB | 8KB flash, same 256B RAM, identical peripherals and pinout - direct code-compatible upgrade path. | Supports larger firmware images and complex algorithms; no change to PCB or driver layer required. | Select when future firmware expansion or OTA updates demand >4KB code space. |
| MSP430G2553IPW28 | 28-pin TSSOP, 16KB flash, 512B RAM, enhanced USCI (not USART0), but lacks integrated VREF and DTC. | Requires external reference for ADC accuracy; higher active current (220 µA) and no LPM4 0.1 µA guarantee. | Choose for cost-sensitive designs where pin count reduction and legacy toolchain compatibility outweigh ultra-low-power needs. |
Compared with MSP430F1232IRHB, the MSP430A065IRBHR trades flash capacity for lower unit cost and smaller footprint; versus MSP430G2553IPW28, it delivers superior power efficiency and integrated analog subsystem - making it optimal for long-life, sensor-centric deployments.
Availability
MSP430A065IRBHR is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, industrial condition monitors, and smart utility meter interfaces requiring stable component supply and long-term manufacturability.
Supply support for MSP430A065IRBHR 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 for industrial, automotive, and consumer markets.
The MSP430x12x2 product line was designed specifically for ultralow-power, battery-operated measurement and sensing applications - emphasizing extended runtime, integrated analog front-ends, and rapid wake-up responsiveness.
FAQ
What is the maximum ADC sampling rate supported by the MSP430A065IRBHR?
The MSP430A065IRBHR supports a maximum ADC sampling rate of 200 kSPS. This specification is achieved using the internal reference and DTC-assisted autoscan mode. The 10-bit SAR core delivers consistent resolution across the full 1.8–3.6 V supply range, and the MSP430A065IRBHR's ADC10 module includes dedicated registers (ADC10SA, ADC10DTC0/1) to configure burst sampling without CPU involvement.
Does the MSP430A065IRBHR support JTAG debugging and in-circuit programming?
Yes, the MSP430A065IRBHR supports full JTAG debugging and programming via the TEST pin (Pin 29) and P1.x JTAG pins (TCK/TMS/TDI/TDO). The device implements standard IEEE 1149.1 boundary-scan logic and is compatible with TI's MSP-FET and IAR Embedded Workbench. JTAG access remains functional even when the security fuse is blown, though flash readout is blocked - preserving debug capability while protecting firmware IP in the MSP430A065IRBHR.
What are the exact low-power modes available on the MSP430A065IRBHR and their typical current draw?
The MSP430A065IRBHR offers five software-configurable low-power modes: LPM0 (0.7 µA), LPM1 (0.7 µA), LPM2 (1.2 µA), LPM3 (0.3 µA), and LPM4 (0.1 µA). All values are measured at 2.2 V with ACLK active (32-kHz crystal) and RAM retention enabled. LPM4 disables all clocks including ACLK and stops the crystal oscillator - making it the deepest sleep state. Wake-up from any mode occurs in <6 µs via interrupt, and the MSP430A065IRBHR's DCO ensures immediate clock readiness.
Can the MSP430A065IRBHR operate without an external crystal?
Yes, the MSP430A065IRBHR can operate without an external crystal by using its internal digitally controlled oscillator (DCO) as the MCLK and SMCLK source. The DCO is factory-trimmed and supports frequency calibration via DCOCTL/BCSCTL registers. While ACLK requires either a 32-kHz crystal or external clock, the MSP430A065IRBHR's DCO enables full functionality - including ADC, Timer_A, and USART0 - using only VCC, VSS, and optional external resistor (ROSC on P2.5) for nominal frequency tuning.
Which pins on the MSP430A065IRBHR support analog input for the 10-bit ADC?
The MSP430A065IRBHR supports analog input on eight dedicated ADC channels: A0 through A7. These map to P2.0, P2.1, P2.2, P2.3, P2.4, P3.0, P3.6, and P3.7 - corresponding to Pins 6, 7, 8, 18, 19, 9, 15, and 16 in the RHB package. Each channel accepts 0–VCC or 0–VREF+ differential input, and the MSP430A065IRBHR's ADC10AE register controls analog enable per pin. VREF+ and VREF− are accessible on P2.4 and P2.3 respectively for precision single-ended or differential measurements.
MSP430A065IRBHR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 32-VFQFN Exposed Pad
- Series:
- MSP430x1xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430
- Core Size:
- 16-Bit
- Speed:
- 8MHz
- Connectivity:
- SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 22
- Program Memory Size:
- 8KB (8K x 8 + 256B)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 256 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:
MSP430A065IRBHR FAQ
1.How can I place an order for MSP430A065IRBHR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430A065IRBHR 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 MSP430A065IRBHR reliable?
The price and inventory of MSP430A065IRBHR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430A065IRBHR is usually 5 days.
3.What payment methods are accepted for MSP430A065IRBHR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430A065IRBHR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430A065IRBHR?
MSP430A065IRBHR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430A065IRBHR 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 MSP430A065IRBHR?
For technical support, including MSP430A065IRBHR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430A065IRBHR requirements.
6.How does Aetrix verify that MSP430A065IRBHR is sourced from the original manufacturer or authorized distributors?
All MSP430A065IRBHR 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 MSP430A065IRBHR meets industry standards.
7.What is the process for return or replacement of MSP430A065IRBHR?
All MSP430A065IRBHR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430A065IRBHR, 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 MSP430A065IRBHR part is unused and in its original packaging.
Return procedure for MSP430A065IRBHR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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