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Home > Products > Integrated Circuits (ICs) > Embedded > Microcontrollers

Texas Instruments MSP430F1122IPW

Name: MSP430F1122IPW
Brand: Texas Instruments
SKU: MSP430F1122IPW
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MSP430F1122IPW

Manufacturer:: Texas Instruments

Category:: Microcontrollers

Package:: 20-TSSOP (0.173", 4.40mm Width)

Datasheet:: MSP430F1122IPW.pdf

Description:: IC MCU 16BIT 4KB FLASH 20TSSOP

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Product details

Overview

MSP430F1122IPW from Texas Instruments is an ultralow-power 16-bit RISC microcontroller with 4KB flash, 256B RAM, 10-bit 200-ksps ADC, Timer_A3 with three capture/compare registers, and serial communication support (UART/SPI only in x12x2 variants). It operates from 1.8 V to 3.6 V and targets battery-powered sensor nodes and portable measurement systems.

For engineers reviewing the MSP430F1122IPW datasheet, MSP430F1122IPW pinout, MSP430F1122IPW application, or MSP430F1122IPW equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases, and validated alternative options for embedded design and sourcing decisions.

Technical Context

The MSP430F1122IPW 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 internal resistors - enabling wake-up from standby mode in under 6 µs.

This device belongs to the MSP430x11x2 family and lacks USART0 hardware; it supports only Timer_A3, ADC10 with internal reference and DTC, and two 8-bit I/O ports (P1: 8 pins, P2: 6 pins). No P3 port or UART/SPI peripherals are present - confirmed by functional block diagram and terminal function tables.

Key Specifications

Parameter	Value and Actual Design Meaning
Core Architecture	16-bit RISC CPU with 16 general-purpose registers and constant generators; enables efficient code execution and low-cycle-count interrupt response.
Flash / RAM	4KB flash + 256B RAM; sufficient for compact firmware with ADC data buffering and timer-based control logic in space-constrained designs.
ADC Resolution & Speed	10-bit SAR ADC with 200 ksps sampling rate and integrated reference; supports real-time analog monitoring without external reference components.
Power Modes	Five low-power modes including LPM4 (0.1 µA RAM retention); extends battery life in intermittent-sensing applications like environmental loggers.
Supply Voltage Range	1.8 V to 3.6 V; compatible with single-cell Li-ion, LiFePO₄, or dual alkaline batteries without regulation overhead.
Wake-Up Time	<6 µs from standby mode; enables rapid response to external interrupts (e.g., motion or threshold triggers) while preserving energy efficiency.
Timer Peripheral	16-bit Timer_A3 with three capture/compare registers; supports PWM generation, input capture for pulse-width measurement, and precise interval timing.

Pinout & Package

Package: 20-pin TSSOP (PW), body size 6.5 mm × 4.4 mm, 0.65 mm pitch. Thermal pad not present. Pin 1 marked via dot or bevel.

Pin/Terminal	Circuit Role	Design Meaning
1 / TEST	JTAG test mode select	Input that enables JTAG debug interface on P1.x pins; must be pulled low during normal operation to avoid unintended test activation.
2 / VCC	Supply voltage	Main power input (1.8–3.6 V); requires local 100 nF ceramic decoupling adjacent to pin for stable core and analog operation.
3 / P2.5/ROSC	DCO resistor input	Analog input for external resistor setting DCO nominal frequency; open-drain compatible, no pull-up required.
4 / VSS	Ground reference	Digital and analog ground return; must be connected to low-impedance PCB ground plane to minimize noise in ADC and timer operation.
5 / XOUT	Crystal oscillator output	Output from internal inverter driving 32-kHz crystal; requires matched load capacitance (typically 12.5 pF) per crystal spec.
6 / XIN	Crystal oscillator input	Input to internal inverter; connects directly to crystal terminal; sensitive to PCB trace length and noise coupling.
7 / RST/NMI	Reset/nonmaskable interrupt	Active-low reset input; also serves as NMI source; internal pull-up ensures reliable startup when external RC network used.
8 / P2.0/ACLK/A0	Port P2.0 / ACLK output / ADC channel A0	Multi-function pin: outputs ACLK for peripheral sync, serves as analog input A0, or general I/O; configured via P2SEL register.
9 / P2.1/INCLK/A1	Port P2.1 / INCLK input / ADC channel A1	Accepts external clock into Timer_A; also ADC input A1 and digital I/O; INCLK routing enables independent timer clocking.
10 / P2.2/TA0/A2	Port P2.2 / Timer_A CCI0B / ADC channel A2	Supports capture of external events on TA0, analog input A2, or GPIO; used for BSL receive in bootloader mode.
11 / P2.3/TA1/A3/VREF−	Port P2.3 / Timer_A CCI1B / ADC channel A3 / VREF−	Provides negative reference for ADC; also supports TA1 capture and general I/O; VREF− connection enables ratiometric measurements.
12 / P2.4/TA2/A4/VREF+	Port P2.4 / Timer_A CCI2B / ADC channel A4 / VREF+	Supplies positive ADC reference; configurable as internal 2.5 V or external source; critical for accuracy in precision sensing.
13 / P1.0/TACLK/ADC10CLK	Port P1.0 / Timer_A clock input / ADC conversion clock	Accepts external clock for Timer_A or ADC timing; allows synchronous sampling aligned to system events or external triggers.
14 / P1.1/TA0	Port P1.1 / Timer_A CCI0A / BSL transmit	Primary capture input for TA0; also transmits BSL serial data; dual-use simplifies programming interface in field-deployed units.
15 / P1.2/TA1	Port P1.2 / Timer_A CCI1A	Capture input for TA1; supports edge-triggered event logging (e.g., encoder pulses or switch bounce detection).
16 / P1.3/TA2	Port P1.3 / Timer_A CCI2A	Capture input for TA2; enables third independent timing channel for multi-signal correlation (e.g., phase difference measurement).
17 / P1.4/SMCLK/TCK	Port P1.4 / SMCLK output / JTAG TCK	Outputs sub-main clock for peripheral sync or serves as JTAG test clock; SMCLK routing aids in debugging clock-dependent modules.
18 / P1.5/TA0/TMS	Port P1.5 / Timer_A Out0 / JTAG TMS	Timer_A compare output or JTAG mode select; shared function requires careful pinmux configuration during debug vs. runtime.
19 / P1.6/TA1/TDI/TCLK	Port P1.6 / Timer_A Out1 / JTAG TDI / test clock	Delivers TA1 output or accepts JTAG data; TCLK option supports boundary scan testing without dedicated clock line.
20 / P1.7/TA2/TDO/TDI	Port P1.7 / Timer_A Out2 / JTAG TDO/TDI	Timer output or JTAG data I/O; TDO/TDI selection controlled by JTAG instruction - prevents bus contention in mixed-mode use.

Key Features

Feature	Design Value
Ultralow-power active mode	200 µA at 1 MHz and 2.2 V - enables continuous sensor polling for >1 year on CR2032 coin cell in duty-cycled applications.
Integrated ADC with DTC	10-bit ADC with autoscan and Data Transfer Controller eliminates CPU involvement during multi-channel conversions, reducing firmware overhead.
Digitally controlled oscillator (DCO)	Stabilizes in <6 µs from LPM3/LPM4 - supports fast wake-up for time-critical interrupts without external crystal startup delay.
Programmable code protection	Security fuse prevents unauthorized flash read-out - essential for protecting proprietary algorithms in deployed edge devices.
Supply voltage brownout protection	Internal POR/BOR circuit ensures reliable reset below 1.7 V - avoids erratic behavior during battery depletion or supply transients.
On-chip debug interface	JTAG support via TEST, TCK, TMS, TDI, TDO pins enables full-speed debugging and flash programming without external adapters.

Applications

Portable Gas Sensor Node	Industrial Temperature Logger
Use Scenario: Battery-powered CO₂ sensor using electrochemical cell with analog output, logging readings every 30 seconds. IC Role / Device Role / Timing Role: MSP430F1122IPW performs ADC sampling, applies calibration math, stores data to flash, and manages sleep/wake cycles. Use Value: 0.1 µA off-mode current and integrated reference enable 5+ year operation on AA batteries without external regulators or references.	Use Scenario: DIN-rail mounted temperature monitor with thermistor inputs, RS-485 interface (via external transceiver), and local LED status. IC Role / Device Role / Timing Role: MSP430F1122IPW reads four thermistor channels via ADC10, computes linearized values, and drives UART-linked transceiver. Use Value: 200 ksps ADC supports oversampling for noise reduction; Timer_A3 generates precise 1-second intervals for periodic sampling.
Smart Water Meter Interface	Low-Power Motion Detector
Use Scenario: Ultrasonic flow meter front-end capturing echo signals, calculating time-of-flight, and transmitting via LoRaWAN gateway. IC Role / Device Role / Timing Role: MSP430F1122IPW triggers ultrasonic burst, captures return signal via ADC, computes TOF, and wakes radio only on event. Use Value: Sub-6 µs wake-up and 16-bit Timer_A3 allow µs-resolution timing for accurate distance calculation without high-frequency clocks.	Use Scenario: PIR-based occupancy sensor in office lighting control, detecting movement and signaling DALI ballast via optocoupler. IC Role / Device Role / Timing Role: MSP430F1122IPW conditions PIR analog output, detects threshold crossings using ADC comparator mode, and controls output timing. Use Value: Five power-saving modes let device remain in LPM4 (0.1 µA) between detections; TA0/TA1 handle debounce and hold-off timing autonomously.

Portable Gas Sensor Node

Industrial Temperature Logger

Use Scenario: Battery-powered CO₂ sensor using electrochemical cell with analog output, logging readings every 30 seconds.

IC Role / Device Role / Timing Role: MSP430F1122IPW performs ADC sampling, applies calibration math, stores data to flash, and manages sleep/wake cycles.

Use Value: 0.1 µA off-mode current and integrated reference enable 5+ year operation on AA batteries without external regulators or references.

Use Scenario: DIN-rail mounted temperature monitor with thermistor inputs, RS-485 interface (via external transceiver), and local LED status.

IC Role / Device Role / Timing Role: MSP430F1122IPW reads four thermistor channels via ADC10, computes linearized values, and drives UART-linked transceiver.

Use Value: 200 ksps ADC supports oversampling for noise reduction; Timer_A3 generates precise 1-second intervals for periodic sampling.

Smart Water Meter Interface

Low-Power Motion Detector

Use Scenario: Ultrasonic flow meter front-end capturing echo signals, calculating time-of-flight, and transmitting via LoRaWAN gateway.

IC Role / Device Role / Timing Role: MSP430F1122IPW triggers ultrasonic burst, captures return signal via ADC, computes TOF, and wakes radio only on event.

Use Value: Sub-6 µs wake-up and 16-bit Timer_A3 allow µs-resolution timing for accurate distance calculation without high-frequency clocks.

Use Scenario: PIR-based occupancy sensor in office lighting control, detecting movement and signaling DALI ballast via optocoupler.

IC Role / Device Role / Timing Role: MSP430F1122IPW conditions PIR analog output, detects threshold crossings using ADC comparator mode, and controls output timing.

Use Value: Five power-saving modes let device remain in LPM4 (0.1 µA) between detections; TA0/TA1 handle debounce and hold-off timing autonomously.

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
MSP430F1132IPW	8KB flash, same 256B RAM, identical peripherals and pinout; no USART0 support.	Supports larger firmware (e.g., BLE stack adaptation or extended calibration tables) without changing PCB layout.	Select when firmware growth exceeds 4KB but USART0 is unnecessary; drop-in replacement with no hardware changes.
MSP430F1222IPW	Same memory (4KB/256B), adds USART0 (UART/SPI), P3 port (8 pins), and two extra ADC inputs (A5–A7); 28-pin TSSOP.	Enables direct UART communication with host MCU or SPI sensors; requires PCB redesign due to 28-pin footprint and additional signals.	Choose when serial connectivity is required and board revision is feasible; not pin-compatible with MSP430F1122IPW.

Compared with MSP430F1132IPW, the MSP430F1122IPW trades flash capacity for cost and die size; compared with MSP430F1222IPW, it omits USART0 and P3 to reduce complexity and power in minimal-footprint sensing roles.

Availability

MSP430F1122IPW is available at Aetrix Electronics and suitable for portable medical monitors, industrial data loggers, and smart utility meter interfaces requiring stable component supply across multi-year production cycles.

Supply support for MSP430F1122IPW 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 over 50 years of innovation in low-power design.

The MSP430F1122IPW belongs to the MSP430x11x2 ultralow-power microcontroller product line, engineered for extended battery life in portable measurement and sensing applications where energy efficiency and integration are critical.

FAQ

What is the maximum ADC sampling rate supported by the MSP430F1122IPW?

The MSP430F1122IPW features a 10-bit ADC10 module rated at 200 ksps (kilo-samples per second) under specified conditions - achievable with internal reference and optimized timing. This rate supports oversampling for noise reduction or fast transient capture in sensor applications, and the Data Transfer Controller (DTC) enables automatic storage without CPU intervention.

Does the MSP430F1122IPW include hardware UART or SPI peripherals?

No, the MSP430F1122IPW does not include USART0 or any hardware UART/SPI peripheral. That functionality is exclusive to the MSP430x12x2 family (e.g., MSP430F1222IPW). The MSP430F1122IPW relies on software-based bit-banging or external transceivers for serial communication.

What package type is used for the MSP430F1122IPW?

The MSP430F1122IPW is packaged in a 20-pin plastic TSSOP (Thin Shrink Small Outline Package), designated "PW" in TI's ordering nomenclature. Its dimensions are 6.5 mm × 4.4 mm with 0.65 mm lead pitch, and it includes no thermal pad.

Can the MSP430F1122IPW operate from a single 1.8-V supply?

Yes, the MSP430F1122IPW supports a minimum supply voltage of 1.8 V across its full operating temperature range (−40°C to 85°C), making it compatible with single-cell lithium chemistries and low-voltage energy harvesting systems without boost regulation.

How many I/O pins does the MSP430F1122IPW provide?

The MSP430F1122IPW provides 14 usable digital I/O pins: Port P1 offers 8 programmable bits (P1.0–P1.7), and Port P2 offers 6 bits (P2.0–P2.5). No P3 port is implemented - confirmed by functional block diagram, terminal tables, and family documentation.

MSP430F1122IPW Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Package/Case:: 20-TSSOP (0.173", 4.40mm Width)

Series:: MSP430x1xx

Packaging:: Bulk

Product Status:: Active

Programmable:: 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:

MSP430F1122IPW FAQ

1.How can I place an order for MSP430F1122IPW through Aetrix?

Please submit a Request for Quotation (RFQ) for MSP430F1122IPW 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 MSP430F1122IPW reliable?

The price and inventory of MSP430F1122IPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F1122IPW is usually 5 days.

3.What payment methods are accepted for MSP430F1122IPW?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F1122IPW transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MSP430F1122IPW?

MSP430F1122IPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MSP430F1122IPW 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 MSP430F1122IPW?

For technical support, including MSP430F1122IPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F1122IPW requirements.

6.How does Aetrix verify that MSP430F1122IPW is sourced from the original manufacturer or authorized distributors?

All MSP430F1122IPW 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 MSP430F1122IPW meets industry standards.

7.What is the process for return or replacement of MSP430F1122IPW?

All MSP430F1122IPW units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F1122IPW, 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 MSP430F1122IPW part is unused and in its original packaging.

Return procedure for MSP430F1122IPW:

1.Submit a request within 90 days.

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

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