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Texas Instruments MSP430F1122IRHBR

Name: MSP430F1122IRHBR
Brand: Texas Instruments
SKU: MSP430F1122IRHBR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MSP430F1122IRHBR

Manufacturer:: Texas Instruments

Category:: Microcontrollers

Package:: 32-VFQFN Exposed Pad

Datasheet:: MSP430F1122IRHBR.pdf

Description:: IC MCU 16BIT 4KB FLASH 32VQFN

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Product details

Overview

MSP430F1122IRHBR from Texas Instruments is an ultralow-power 16-bit RISC microcontroller with 4KB flash, 256B RAM, 10-bit ADC, Timer_A3 with three capture/compare registers, and serial communication capability via UART/SPI (not implemented in this variant). It operates from 1.8 V to 3.6 V and supports five power-saving modes, enabling battery-powered sensor nodes and portable instrumentation.

For engineers reviewing the MSP430F1122IRHBR datasheet, MSP430F1122IRHBR pinout, MSP430F1122IRHBR application, or MSP430F1122IRHBR equivalent, key selection criteria include active-mode current (200 µA @ 1 MHz, 2.2 V), wake-up time (<6 µs from standby), 20-pin QFN (RHB) package, integrated DCO oscillator, and absence of USART0 hardware - distinguishing it from MSP430x12x2 family members.

Technical Context

The MSP430F1122IRHBR implements a 16-bit RISC CPU with 125 ns instruction cycle time and seven addressing modes. Its basic clock module integrates a digitally controlled oscillator (DCO), 32-kHz crystal support, and resistor-based frequency tuning via P2.5/ROSC - enabling sub-6-µs wake-up from LPM3/LPM4 without external timing components.

It features two 8-bit I/O ports (P1: 8 pins, P2: 6 pins), a 10-bit, 200-ksps ADC with internal reference and data transfer controller (DTC), and Timer_A3 with three independent capture/compare channels supporting PWM, input capture, and interval timing - all accessible via memory-mapped peripherals at fixed SFR addresses (e.g., TACCR0 at 017Ah, ADC10MEM at 01B4h).

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 MCLK cycle for deterministic timing.
Memory	4KB flash + 256B RAM + 1KB ROM boot loader; flash supports in-system programming via JTAG or BSL UART interface.
Power Consumption	Active mode: 200 µA @ 1 MHz, 2.2 V; Standby: 0.7 µA; Off mode (RAM retention): 0.1 µA - enables multi-year coin-cell operation.
ADC Performance	10-bit SAR ADC with 200 ksps sampling rate, internal reference, sample-and-hold, autoscan, and DTC - eliminates CPU overhead for burst acquisition.
Timer Subsystem	Timer_A3 with three capture/compare registers (TACCR0–2), supporting PWM generation, input capture on up to six pins, and interrupt-driven event timing.
Operating Voltage	1.8 V to 3.6 V supply range - compatible with single-cell Li-ion, LiFePO₄, or dual-AA alkaline systems without regulation.
Low-Power Modes	Five software-selectable modes (LPM0–LPM4); LPM4 disables all clocks including ACLK, reducing current to 0.1 µA with RAM retention.

Pinout & Package

Package: 32-pin QFN (RHB), 5 mm × 5 mm, 0.5 mm pitch, with exposed thermal pad connected to VSS.

Pin/Terminal	Circuit Role	Design Meaning
1	TEST	JTAG test mode select; required for boundary-scan and debug access during development and production testing.
2	VCC	Main power supply input (1.8–3.6 V); decoupling capacitor placement near this pin is critical for noise immunity.
3	P2.5/ROSC	External resistor connection for DCO frequency calibration; sets nominal DCO frequency without crystal.
4,17,20,31	NC	No-connect pins; must be tied to VSS per datasheet to prevent floating inputs and leakage current increase.
5	XOUT	Crystal oscillator output; drives external 32-kHz crystal when used with XIN for low-power real-time clock operation.
6	XIN	Crystal oscillator input; forms Pierce oscillator with external 32-kHz crystal for ACLK source in LPM3/LPM4.
7	RST/NMI	Reset or non-maskable interrupt input; active-low signal resets CPU and peripherals, initializes stack pointer and PC.
8	P2.0/ACLK/A0	Programmable I/O pin; outputs ACLK or serves as analog input channel A0 for ADC10.
9	P2.1/INCLK/A1	Programmable I/O pin; accepts external clock on INCLK or serves as analog input A1 for ADC10.
10	P2.2/TA0/A2	Programmable I/O pin; Timer_A capture/compare input/output or analog input A2; also BSL receive pin.
11	P2.3/TA1/A3/VREF−	Programmable I/O pin; Timer_A channel 1 I/O or analog input A3 or negative ADC reference terminal.
12	P2.4/TA2/A4/VREF+	Programmable I/O pin; Timer_A channel 2 I/O or analog input A4 or positive ADC reference terminal.
13	P1.0/TACLK/ADC10CLK	Programmable I/O pin; Timer_A clock input or ADC conversion clock source - synchronizes sampling to timer events.
14	P1.1/TA0	Programmable I/O pin; Timer_A channel 0 capture/compare I/O - supports PWM output or edge-triggered capture.
15	P1.2/TA1	Programmable I/O pin; Timer_A channel 1 capture/compare I/O - enables dual-edge PWM or quadrature decoding.
16	P1.3/TA2	Programmable I/O pin; Timer_A channel 2 capture/compare I/O - provides third independent PWM or capture channel.
18	P1.4/SMCLK/TCK	Programmable I/O pin; outputs SMCLK or serves as JTAG test clock (TCK) for debugging and programming.
19	P1.5/TA0/TMS	Programmable I/O pin; Timer_A channel 0 compare output or JTAG test mode select (TMS) for state machine control.
21	P1.6/TA1/TDI/TCLK	Programmable I/O pin; Timer_A channel 1 compare output or JTAG test data input (TDI) or test clock (TCLK).
22	P1.7/TA2/TDO/TDI	Programmable I/O pin; Timer_A channel 2 compare output or JTAG test data output (TDO) or data input (TDI) depending on instruction.
23–29	Reserved	Internally unconnected; must be tied to VSS to avoid floating nodes and increased current consumption.
30	VSS	Ground reference; connects to PCB ground plane and QFN thermal pad for thermal and EMI performance.
32	P2.5/ROSC	Duplicate pin assignment (same function as Pin 3); ensures robust resistor connection for DCO calibration.

Key Features

Feature	Design Value
Ultralow-power operation	0.1 µA off-mode current with RAM retention enables decade-scale battery life in energy-harvesting sensors.
Integrated DCO oscillator	Digitally controlled oscillator stabilizes in <6 µs - eliminates crystal startup delay and supports rapid wake-up from deep sleep.
Hardware-accelerated ADC	Data Transfer Controller (DTC) automates ADC result storage to RAM without CPU intervention - reduces active time by >90% in burst sampling.
Flexible I/O with interrupt	All P1 and P2 pins support edge-selectable interrupts (rising/falling), enabling low-power event-driven wake-up from LPM4.
On-chip security	Programmable code protection via security fuse prevents unauthorized flash read-out - essential for firmware IP protection.
Brownout detection	Supply voltage brownout protection resets MCU if VCC drops below threshold - prevents erratic behavior during battery depletion.

Applications

Portable Medical Sensors	Industrial Temperature Monitoring
Use Scenario: Wearable pulse oximeter acquiring analog photodiode signals under intermittent LED illumination. IC Role / Device Role / Timing Role: MSP430F1122IRHBR acts as system controller and signal acquisition engine, using ADC10 autoscan to digitize multiple channels while Timer_A triggers synchronized LED pulses. Use Value: 200-ksps ADC with DTC stores 128 samples to RAM in <650 µs, allowing CPU to remain in LPM3 for >99% of measurement cycle - extending CR2032 battery life to 3+ years.	Use Scenario: Wireless node measuring ambient temperature via thermistor bridge in factory HVAC ducts. IC Role / Device Role / Timing Role: MSP430F1122IRHBR performs ratiometric ADC measurements, computes temperature via lookup table, and transmits results via external RF transceiver. Use Value: 0.7 µA standby current permits 10-minute wake-up intervals; integrated DCO ensures precise 1-second timing between readings without quartz crystal cost or board space.
Smart Utility Metering	Asset Tracking Beacon
Use Scenario: Battery-powered water meter logging flow pulses and pressure over 10-year deployment. IC Role / Device Role / Timing Role: MSP430F1122IRHBR counts mechanical flow switch closures via P1 interrupt pins and logs timestamped events using Timer_A as real-time counter. Use Value: Five low-power modes allow dynamic scaling: LPM4 (0.1 µA) between pulses, LPM3 (0.7 µA) during RTC-based hourly self-checks, and brief AM for flash writes - achieving 15-year battery life.	Use Scenario: GPS-denied indoor asset tag reporting location via BLE beaconing only when motion is detected. IC Role / Device Role / Timing Role: MSP430F1122IRHBR interfaces with MEMS accelerometer, processes wake-on-motion thresholds, and controls external BLE SoC power state. Use Value: Edge-selectable P1 interrupts detect motion events in <1 µs; wake-up from LPM4 in <6 µs ensures no motion is missed while consuming <1 µA average current over 24-hour period.

Portable Medical Sensors

Industrial Temperature Monitoring

Use Scenario: Wearable pulse oximeter acquiring analog photodiode signals under intermittent LED illumination.

IC Role / Device Role / Timing Role: MSP430F1122IRHBR acts as system controller and signal acquisition engine, using ADC10 autoscan to digitize multiple channels while Timer_A triggers synchronized LED pulses.

Use Value: 200-ksps ADC with DTC stores 128 samples to RAM in <650 µs, allowing CPU to remain in LPM3 for >99% of measurement cycle - extending CR2032 battery life to 3+ years.

Use Scenario: Wireless node measuring ambient temperature via thermistor bridge in factory HVAC ducts.

IC Role / Device Role / Timing Role: MSP430F1122IRHBR performs ratiometric ADC measurements, computes temperature via lookup table, and transmits results via external RF transceiver.

Use Value: 0.7 µA standby current permits 10-minute wake-up intervals; integrated DCO ensures precise 1-second timing between readings without quartz crystal cost or board space.

Smart Utility Metering

Asset Tracking Beacon

Use Scenario: Battery-powered water meter logging flow pulses and pressure over 10-year deployment.

IC Role / Device Role / Timing Role: MSP430F1122IRHBR counts mechanical flow switch closures via P1 interrupt pins and logs timestamped events using Timer_A as real-time counter.

Use Value: Five low-power modes allow dynamic scaling: LPM4 (0.1 µA) between pulses, LPM3 (0.7 µA) during RTC-based hourly self-checks, and brief AM for flash writes - achieving 15-year battery life.

Use Scenario: GPS-denied indoor asset tag reporting location via BLE beaconing only when motion is detected.

IC Role / Device Role / Timing Role: MSP430F1122IRHBR interfaces with MEMS accelerometer, processes wake-on-motion thresholds, and controls external BLE SoC power state.

Use Value: Edge-selectable P1 interrupts detect motion events in <1 µs; wake-up from LPM4 in <6 µs ensures no motion is missed while consuming <1 µA average current over 24-hour period.

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
MSP430F1132IRHBR	8KB flash (vs. 4KB), same RAM, peripherals, and package; identical pinout and electrical specs.	Supports larger firmware images with complex protocol stacks or cryptographic libraries.	Select when firmware size exceeds 4KB or future scalability is required; drop-in replacement with no layout change.
MSP430F1222IRHBR	Adds USART0 hardware (UART/SPI), 28-pin SOWB/TSSOP or 32-pin QFN; otherwise identical core, memory, and analog specs.	Enables direct wired serial communication (e.g., RS-485 sensor bus) without external level shifter or UART IC.	Select when local serial interface is mandatory; requires PCB redesign due to different pin count and function mapping on P3 pins.

Compared with MSP430F1132IRHBR, the MSP430F1122IRHBR trades flash capacity for lower unit cost and smaller code footprint; compared with MSP430F1222IRHBR, it omits USART0 to reduce silicon area and power - making it optimal for pure sensor-node applications where wireless transceivers handle communication off-chip.

Availability

MSP430F1122IRHBR is available at Aetrix Electronics and suitable for portable medical sensors, industrial temperature monitoring, smart utility metering, and asset tracking beacons requiring stable component supply across long-lifecycle deployments.

Supply support for MSP430F1122IRHBR 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 personal electronics markets.

The MSP430F1122IRHBR belongs to the MSP430x11x2 ultralow-power mixed-signal MCU product line, designed specifically for battery-operated measurement systems where nanowatt-level standby current and fast wake-up are critical.

FAQ

Does the MSP430F1122IRHBR include a hardware USART peripheral?

No, the MSP430F1122IRHBR does not implement USART0. That peripheral is exclusive to the MSP430x12x2 family (e.g., MSP430F1222IRHBR). The MSP430F1122IRHBR relies on bit-banged UART or external transceivers for serial communication. This omission reduces die size and static current, aligning with its focus on minimal-power sensor nodes.

What is the maximum operating frequency of the MSP430F1122IRHBR?

The MSP430F1122IRHBR supports up to 1 MHz CPU operation at 2.2 V, with instruction cycle time of 125 ns. Its DCO can be calibrated to higher frequencies, but the device is characterized and guaranteed for reliable operation up to 1 MHz across the full 1.8–3.6 V supply range and −40°C to 85°C temperature range.

How many analog input channels does the ADC10 module support on the MSP430F1122IRHBR?

The ADC10 module on the MSP430F1122IRHBR supports six analog input channels: A0 through A4 plus VeREF+ (P2.4) and VeREF− (P2.3). Channels A0–A4 map directly to P2.0, P2.1, P2.2, P2.3, and P2.4, enabling simultaneous sampling of thermistors, battery voltage dividers, and reference sources within a single compact design.

Is the MSP430F1122IRHBR pin-compatible with the MSP430F1222IRHBR?

No, the MSP430F1122IRHBR and MSP430F1222IRHBR are not pin-compatible. Although both use the 32-pin RHB package, the MSP430F1222IRHBR allocates pins 9–16 to P3.x functions (e.g., UTXD0, URXD0, SIMO0), which are unimplemented and reserved on the MSP430F1122IRHBR. Direct substitution would require PCB redesign and firmware adaptation.

What debug interface does the MSP430F1122IRHBR support?

The MSP430F1122IRHBR supports JTAG debugging via four dedicated pins: TEST (Pin 1), TCK (P1.4), TMS (P1.5), TDI (P1.6/P1.7), and TDO (P1.7). These share functions with GPIO and Timer_A, requiring careful pin configuration during debug session setup. No Spy-Bi-Wire (SBW) support is documented for this variant.

MSP430F1122IRHBR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Package/Case:: 32-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:: -

Peripherals:: Brown-out Detect/Reset, POR, PWM, WDT

Number of I/O:: 14

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:: A/D 8x10b

Oscillator Type:: Internal

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

MSP430F1122IRHBR FAQ

1.How can I place an order for MSP430F1122IRHBR through Aetrix?

Please submit a Request for Quotation (RFQ) for MSP430F1122IRHBR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

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The price and inventory of MSP430F1122IRHBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F1122IRHBR is usually 5 days.

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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 MSP430F1122IRHBR?

For technical support, including MSP430F1122IRHBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F1122IRHBR requirements.

6.How does Aetrix verify that MSP430F1122IRHBR is sourced from the original manufacturer or authorized distributors?

All MSP430F1122IRHBR 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 MSP430F1122IRHBR meets industry standards.

7.What is the process for return or replacement of MSP430F1122IRHBR?

All MSP430F1122IRHBR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F1122IRHBR, 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 MSP430F1122IRHBR part is unused and in its original packaging.

Return procedure for MSP430F1122IRHBR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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