My Inquiry
My Account
Texas Instruments MSP430F122IRHBT
- Part No.:
- MSP430F122IRHBT
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
MSP430F122IRHBT.pdf
- Description:
- IC MCU 16BIT 4KB FLASH 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:250
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MSP430F122IRHBT from Texas Instruments is an ultralow-power 16-bit RISC mixed-signal microcontroller featuring 4KB Flash + 256B RAM, 22 I/O pins, a 16-bit Timer_A with three capture/compare registers, on-chip analog comparator, and USART0 supporting UART/SPI protocols. It operates from 1.8 V to 3.6 V and targets battery-powered sensor systems requiring sub-μA standby current and fast wake-up.
For engineers reviewing the MSP430F122IRHBT datasheet, MSP430F122IRHBT pinout, MSP430F122IRHBT application, or MSP430F122IRHBT equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options for portable measurement and low-power embedded designs.
Technical Context
The MSP430F122IRHBT implements a 16-bit RISC CPU with constant generators and seven addressing modes, enabling single-cycle register operations. Its basic clock module integrates a digitally controlled oscillator (DCO), 32 kHz crystal support, and selectable internal resistors - enabling wake-up from LPM4 in under 6 μs.
Peripherals include a 16-bit Timer_A3 with three independent capture/compare registers, a comparator_A supporting slope A/D conversion and battery monitoring, and USART0 with dual-mode (UART/SPI) serial communication. All I/O ports (P1–P3) support programmable direction and interrupt-on-edge, with P1/P2 offering full interrupt flag control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 general-purpose registers and constant generators; enables high code efficiency and deterministic 125 ns instruction cycle at 1 MHz. |
| Memory | 4KB Flash + 256B RAM + 256B information memory; supports in-system programming via JTAG or UART BSL without external voltage. |
| Power Consumption | Active mode: 200 μA @ 1 MHz / 2.2 V; Standby: 0.7 μA; Off mode (RAM retention): 0.1 μA - optimized for multi-year battery life in sensing nodes. |
| Clock System | Digital-controlled oscillator (DCO) with <6 μs wake-up; supports 32 kHz crystal, high-frequency crystal, resonator, or single external resistor for flexible timing source selection. |
| Peripheral Set | Timer_A3 (3 CC registers), comparator_A (slope A/D, battery monitor), USART0 (software-selectable UART/SPI), watchdog timer, and JTAG debug interface. |
| Operating Range | −40°C to +85°C ambient temperature; 1.8 V to 3.6 V supply voltage - qualified for industrial and extended-temperature embedded applications. |
Pinout & Package
The MSP430F122IRHBT is housed in a 32-pin QFN (RHB) package with exposed thermal pad recommended to be connected to VSS. Pin functions are fully defined per SLAS312C Rev. September 2004.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0/TACLK | Timer input / I/O | Primary clock input for Timer_A; also serves as general-purpose digital I/O with interrupt capability. |
| P1.1/TA0 | Capture/Compare / I/O | Timer_A channel 0 capture input (CCI0A) and compare output (Out0); used for BSL transmit in bootloader mode. |
| P2.2/CAOUT/TA0 | Comparator output / Timer input | Comparator_A output signal; also provides CCI0B capture input for Timer_A channel 0 - enables synchronized analog-digital event triggering. |
| P3.4/UTXD0 | USART transmit / I/O | UART-mode serial data output; supports asynchronous communication at configurable baud rates using double-buffered TX path. |
| RST/NMI | Reset / interrupt input | Active-low reset or nonmaskable interrupt input; initiates power-on reset sequence or handles critical fault conditions. |
| TEST | JTAG test select | Enables JTAG emulation mode when pulled high during power-up; required for boundary-scan testing and flash programming via debugger. |
Key Features
| Feature | Design Value |
|---|---|
| Five software-selectable low-power modes | LPM0–LPM4 provide granular power control - LPM4 draws only 0.1 μA while retaining RAM, enabling decade-scale battery operation in sleep-dominated applications. |
| Integrated analog comparator | Supports precision slope A/D conversion on resistive sensors and real-time battery voltage supervision without external components or ADC resource usage. |
| Bootloader (BSL) over UART | Enables field firmware updates via P1.1 (TX) and P2.2 (RX) pins using standard UART interface - no JTAG hardware required for production programming. |
| 16-bit Timer_A3 with 3 CC registers | Delivers simultaneous PWM generation, input capture (e.g., pulse width measurement), and interval timing - all with independent interrupt vectors for deterministic response. |
| Programmable code protection | Security fuse prevents unauthorized read-out of Flash contents - essential for protecting proprietary algorithms and IP in deployed devices. |
Applications
| Wireless Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered environmental sensor collecting temperature/humidity data and transmitting wirelessly via UART-connected RF transceiver. IC Role / Device Role / Timing Role: Central controller managing sensor acquisition, slope A/D conversion via comparator_A, low-power scheduling, and UART framing for RF link. Use Value: Sub-μA LPM4 current extends coin-cell life beyond 5 years; <6 μs wake-up ensures rapid response to sensor events without missing critical samples. | Use Scenario: Wearable ECG front-end acquiring analog biopotential signals, performing baseline correction, and streaming digitized data to host MCU via SPI. IC Role / Device Role / Timing Role: Analog signal conditioner and digital coordinator - uses comparator_A for lead-off detection and Timer_A for precise sampling intervals. Use Value: Integrated comparator eliminates need for external op-amp/comparator IC; 22 GPIOs support direct connection to multiple electrodes and status LEDs. |
| Smart Utility Meter | Industrial Data Logger |
Use Scenario: Tamper-resistant electricity meter measuring AC parameters, storing billing data in Flash, and communicating via optical port or RS-485 interface. IC Role / Device Role / Timing Role: Main system controller executing metrology algorithms, managing secure Flash writes, and driving UART-based physical layer interface. Use Value: Code protection fuse prevents firmware tampering; 4KB Flash accommodates encrypted firmware and calibration tables with versioning support. | Use Scenario: Ruggedized environmental logger recording temperature, pressure, and humidity at fixed intervals and storing data in Flash for later USB retrieval. IC Role / Device Role / Timing Role: Autonomous data acquisition engine - uses Timer_A interrupts to trigger ADC conversions and comparator_A to detect threshold breaches. Use Value: Single-chip integration reduces BOM count and PCB area; wide −40°C to +85°C operating range ensures reliability in uncontrolled outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F123IRHBT | 8KB Flash + 256B RAM vs. 4KB Flash; identical peripherals, package, and pinout. | Required where firmware size exceeds 4KB or future feature expansion is anticipated. | Select MSP430F123IRHBT if code footprint exceeds 3.5KB or long-term scalability is needed - same layout and driver compatibility. |
| MSP430F2274IRHBT | 16KB Flash + 1KB RAM; enhanced USCI module (replaces USART0); 10-bit SAR ADC; higher MCLK max frequency (16 MHz). | Preferred for designs needing integrated ADC, larger program space, or faster processing without external components. | Choose MSP430F2274IRHBT when migrating to ADC-based sensing or requiring >4KB code space - not pin-compatible but same RHB package footprint. |
Compared with MSP430F122IRHBT, MSP430F123IRHBT offers doubled Flash capacity with zero hardware changes, while MSP430F2274IRHBT introduces ADC and higher performance at the cost of peripheral and register-level incompatibility - making the former ideal for scaling, the latter for functional upgrade.
Availability
MSP430F122IRHBT is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, and smart utility meters requiring stable component supply across multi-year production cycles.
Supply support for MSP430F122IRHBT 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 MSP430F122IRHBT belongs to the MSP430x12x ultralow-power mixed-signal microcontroller family, designed specifically for battery-operated measurement applications demanding extended runtime and rapid wake-up responsiveness.
FAQ
What is the maximum operating frequency of the MSP430F122IRHBT at 3.6 V?
The MSP430F122IRHBT supports a maximum system clock (MCLK) frequency of 8 MHz when operating at VCC = 3.6 V, as specified in the recommended operating conditions table of SLAS312C. This limit applies to both DCO-derived and external crystal-sourced clocks. At lower voltages such as 1.8 V, the maximum frequency drops to 4.15 MHz. The MSP430F122IRHBT's Timer_A and USART0 modules scale accordingly with MCLK, ensuring timing accuracy across the full voltage range.
Does the MSP430F122IRHBT include an analog-to-digital converter (ADC)?
No, the MSP430F122IRHBT does not integrate a dedicated ADC. Instead, it features an analog comparator (comparator_A) that supports slope-type A/D conversion using external RC networks - a technique documented in TI application reports like SLAA089. This method enables low-cost digitization of analog signals without consuming Flash or RAM resources, but requires external passive components and software timing control. For designs requiring true SAR or sigma-delta ADC functionality, alternatives like MSP430F2274IRHBT should be considered.
What package type and pin count does the MSP430F122IRHBT use?
The MSP430F122IRHBT uses a 32-pin QFN (Quad Flat No-lead) package designated as RHB, with an exposed thermal pad recommended to be connected to VSS for optimal thermal performance. This differs from the 28-pin SOWB (DW) and TSSOP (PW) variants of the MSP430F122 family. The RHB package provides improved thermal dissipation and smaller PCB footprint, making it suitable for space-constrained portable applications. Pin assignments are fully detailed in the SLAS312C datasheet Figure 1 (RHB top view) and Terminal Functions table.
How is the MSP430F122IRHBT programmed in-circuit without a JTAG debugger?
The MSP430F122IRHBT supports in-system programming via its built-in bootstrap loader (BSL), which operates over UART using P1.1 (TXD) and P2.2 (RXD) pins. The BSL is activated by holding the RST/NMI pin low while toggling the TEST pin, then sending a password-protected command sequence. This allows firmware updates in production or field deployment without JTAG hardware. The BSL resides in ROM and remains functional even if Flash security fuse is blown, provided the correct 32-byte password is supplied - a capability confirmed in SLAA089 and SLAS312C Section 8.
What are the key differences between MSP430F122IRHBT and MSP430F123IRHBT?
The MSP430F122IRHBT and MSP430F123IRHBT share identical peripherals, package (RHB), pinout, memory organization (256B RAM), and operating specifications. Their sole difference is Flash capacity: MSP430F122IRHBT contains 4KB Flash, while MSP430F123IRHBT contains 8KB Flash. Both parts are drop-in replacements in hardware design, and software migration requires only recompilation. TI explicitly lists them in the same "AVAILABLE OPTIONS" table of SLAS312C, confirming full compatibility except for program memory size.
MSP430F122IRHBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 32-VFQFN Exposed Pad
- Series:
- MSP430x1xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Verified
- Core Processor:
- MSP430 CPU16
- Core Size:
- 16-Bit
- Speed:
- 8MHz
- Connectivity:
- SPI, UART/USART
- Peripherals:
- POR, PWM, WDT
- Number of I/O:
- 22
- Program Memory Size:
- 4KB (4K x 8 + 256B)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 256 x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- Slope A/D
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430F122IRHBT FAQ
1.How can I place an order for MSP430F122IRHBT through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F122IRHBT 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 MSP430F122IRHBT reliable?
The price and inventory of MSP430F122IRHBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F122IRHBT is usually 5 days.
3.What payment methods are accepted for MSP430F122IRHBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F122IRHBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F122IRHBT?
MSP430F122IRHBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F122IRHBT 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 MSP430F122IRHBT?
For technical support, including MSP430F122IRHBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F122IRHBT requirements.
6.How does Aetrix verify that MSP430F122IRHBT is sourced from the original manufacturer or authorized distributors?
All MSP430F122IRHBT 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 MSP430F122IRHBT meets industry standards.
7.What is the process for return or replacement of MSP430F122IRHBT?
All MSP430F122IRHBT units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F122IRHBT, 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 MSP430F122IRHBT part is unused and in its original packaging.
Return procedure for MSP430F122IRHBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MSP430F122IRHBT Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
