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Texas Instruments MSP430F1122IDWR
- Part No.:
- MSP430F1122IDWR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MSP430F1122IDWR.pdf
- Description:
- IC MCU 16BIT 4KB FLASH 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,226
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Product details
Overview
MSP430F1122IDWR 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 basic clock module supporting internal DCO, 32-kHz crystal, or external resistor tuning. It operates from 1.8 V to 3.6 V and targets battery-powered sensor nodes and portable measurement systems.
For engineers reviewing the MSP430F1122IDWR datasheet, MSP430F1122IDWR pinout, MSP430F1122IDWR application, or MSP430F1122IDWR equivalent, key selection criteria include active-mode current (200 µA @ 1 MHz, 2.2 V), wake-up time (<6 µs from standby), RAM retention in off mode (0.1 µA), 20-pin TSSOP package compatibility, and absence of integrated USART (unlike MSP430x12x2 family).
Technical Context
The MSP430F1122IDWR implements a 16-bit RISC CPU with constant generators and seven addressing modes, enabling single-cycle register operations. Its five software-selectable low-power modes-including LPM4 (0.1 µA off mode with RAM retention)-are optimized for extended battery life in intermittent-sensing applications.
It integrates a 10-bit SAR ADC with internal reference, sample-and-hold, autoscan, and data transfer controller (DTC); a 16-bit Timer_A3 with three capture/compare registers supporting PWM and interval timing; and a basic clock module with digitally controlled oscillator (DCO) that stabilizes in under 6 µs. No USART peripheral is present-communication relies on bit-banged UART or external interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 125 ns instruction cycle; enables efficient signal processing in resource-constrained embedded firmware. |
| Flash / RAM | 4KB flash + 256B RAM; sufficient for compact firmware with ADC data buffering and low-overhead control logic. |
| ADC Resolution & Speed | 10-bit SAR ADC, 200 ksps with internal reference and DTC; supports autonomous sampling sequences without CPU intervention. |
| 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. |
| Wake-Up Time | <6 µs from standby to active mode via DCO; critical for rapid response to external interrupts in duty-cycled systems. |
| Clock Sources | Internal DCO, 32-kHz crystal, single external resistor, or high-frequency crystal; eliminates need for external oscillators in cost-sensitive designs. |
| Operating Voltage | 1.8 V to 3.6 V supply range; compatible with Li-ion, Li-SOCl₂, and dual-AA battery configurations across full discharge curve. |
Pinout & Package
Package: 20-pin plastic TSSOP (PW), RoHS-compliant, body size 6.5 mm × 4.4 mm × 1.2 mm, 0.65 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0/TACLK/ADC10CLK | Timer_A clock input / ADC conversion clock | Configurable as external timer clock source or ADC sampling trigger; enables synchronous timing control across analog/digital domains. |
| P1.1–P1.7 | General-purpose I/O with Timer_A capture/compare functions | Eight pins support interrupt-capable digital I/O, PWM output, or event capture-used for sensor interface, LED control, or pulse counting. |
| P2.0–P2.5 | Analog inputs A0–A4 / ACLK / INCLK / ROSC | Six pins serve dual roles: ADC channels (A0–A4), auxiliary clock output, internal clock input, and DCO tuning resistor connection. |
| RST/NMI | Reset or nonmaskable interrupt input | Hardware reset initiation or high-priority fault handling; level-sensitive with internal pullup. |
| TEST | JTAG test mode select | Enables boundary-scan and debug access via JTAG interface during development and production testing. |
| VCC / VSS | Supply voltage / ground reference | Single 1.8–3.6 V supply rail; requires local decoupling (e.g., 100 nF ceramic) near VCC pin for stable low-power operation. |
| XIN / XOUT | Crystal oscillator input/output | Supports 32.768 kHz watch crystal for precise real-time clock generation; no external load capacitors required per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow-power operation | 0.1 µA off-mode current with full RAM retention enables decade-scale battery life in sealed sensor deployments. |
| Integrated 10-bit ADC with DTC | Autoscan and data transfer controller allow up to 16-channel conversions stored directly to RAM-no CPU polling or ISR overhead. |
| 16-bit Timer_A3 with 3 CC registers | Supports simultaneous PWM generation, input capture, and interval timing-ideal for motor control, pulse-width measurement, or LED dimming. |
| Programmable code protection | Security fuse prevents unauthorized readout of flash contents, protecting proprietary firmware and calibration data. |
| Brownout protection | On-chip POR/BOR circuit ensures reliable reset during power ramp-up/down, preventing erratic execution at marginal supply voltages. |
Applications
| Wireless Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered temperature/humidity node transmitting data via sub-GHz RF transceiver on scheduled intervals. IC Role / Device Role / Timing Role: Central controller managing ADC sampling, sleep/wake scheduling, data formatting, and SPI communication to RF IC. Use Value: 0.1 µA off-mode current extends CR2032 battery life beyond 5 years; 6 µs wake-up ensures timely response to sensor-triggered events. |
Use Scenario: Handheld blood oxygen saturation (SpO₂) monitor with optical sensor, display, and button interface. IC Role / Device Role / Timing Role: Signal processor acquiring photodiode ADC samples, computing ratio-based SpO₂, and driving segment LCD. Use Value: Integrated 10-bit ADC with internal reference eliminates external precision voltage reference; 200 ksps supports oversampling for noise reduction. |
| Industrial Data Logger | Smart Meter Tamper Detection |
Use Scenario: Enclosed environmental logger recording temperature, pressure, and humidity every 10 minutes for 10+ years. IC Role / Device Role / Timing Role: Low-power host executing timed ADC reads, storing results in flash, and maintaining RTC via 32-kHz crystal. Use Value: Crystal oscillator support and LPM3 mode (0.3 µA typical) enable accurate timekeeping with minimal current draw between samples. |
Use Scenario: Utility meter detecting physical tampering (e.g., magnet, case opening) using reed switch and accelerometer inputs. IC Role / Device Role / Timing Role: Always-on supervisor monitoring GPIO interrupts, logging events to flash, and triggering secure alerts. Use Value: Wake-up from standby in <6 µs ensures immediate response to tamper events; programmable security fuse prevents firmware extraction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultralow-power microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F1132IDWR | 8KB flash, same 256B RAM, identical peripherals and pinout | Supports larger firmware images (e.g., BLE stack, advanced filtering algorithms) without layout change | Select when firmware size exceeds 4KB or future scalability is required; same PCB and toolchain compatibility. |
| MSP430F1222IPW | 28-pin TSSOP, adds USART0 (UART/SPI), 8KB flash, same RAM and ADC | Enables direct serial communication with modems, displays, or host processors-eliminates bit-banged UART overhead | Choose when hardware UART/SPI is mandatory; requires PCB redesign due to 28-pin footprint and additional peripheral routing. |
Compared with MSP430F1122IDWR, the F1132IDWR offers double flash capacity in identical packaging for seamless firmware growth, while the F1222IPW adds hardware serial capability at the cost of larger footprint and higher pin count-making it suitable only when communication bandwidth or protocol complexity justifies the layout impact.
Availability
MSP430F1122IDWR is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, and industrial data loggers requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant manufacturing.
Supply support for MSP430F1122IDWR 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 focused on analog, embedded processing, and connectivity technologies, serving industrial, automotive, and consumer markets with high-reliability components.
The MSP430F1122IDWR belongs to TI's ultralow-power mixed-signal MCU product line, designed specifically for battery-operated measurement and sensing applications where energy efficiency, integration, and long-term availability are critical.
FAQ
What is the maximum operating frequency of the MSP430F1122IDWR?
The MSP430F1122IDWR does not specify a maximum system clock frequency in its datasheet. Its DCO is factory-trimmed for ~1 MHz at 2.2 V, and the device achieves a 125 ns instruction cycle time-equivalent to 8 MHz effective throughput for register operations. However, all timing specifications (e.g., ADC, Timer_A) are validated up to 1 MHz, and operation above this frequency is not guaranteed or characterized.
Does the MSP430F1122IDWR support hardware UART or SPI communication?
No, the MSP430F1122IDWR does not include a hardware USART peripheral. Unlike the MSP430x12x2 series, it lacks UART/SPI capability. Serial communication must be implemented in firmware using GPIO bit-banging or external level-shifting transceivers. The MSP430F1222IPW is the nearest pin-compatible alternative with integrated USART0.
What package type is used for the MSP430F1122IDWR?
The MSP430F1122IDWR uses a 20-pin plastic TSSOP (Thin Shrink Small Outline Package), designated as PW in TI's ordering nomenclature. It has a 0.65 mm lead pitch, 6.5 mm × 4.4 mm body dimensions, and is RoHS-compliant. This package is distinct from the 20-pin SOWB (DW) and 32-pin QFN (RHB) variants offered for the same part number.
How much flash memory and RAM does the MSP430F1122IDWR contain?
The MSP430F1122IDWR contains 4KB of on-chip flash memory for program storage and 256 bytes of RAM for runtime variables and stack. Flash is organized in 512-byte segments, including dedicated interrupt vector space and information memory for calibration data. RAM is fully retained in LPM4 (off mode) at 0.1 µA.
Is the MSP430F1122IDWR pin-compatible with other MSP430x11x2 devices?
Yes, the MSP430F1122IDWR shares identical pinout and electrical characteristics with other 20-pin TSSOP variants in the MSP430x11x2 family, including MSP430F1132IDWR. Both devices use the same DW/PW package mapping, I/O function assignment, and power/ground pin locations-enabling drop-in replacement where flash size suffices.
MSP430F1122IDWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Series:
- MSP430x1xx
- Packaging:
- Tape & Reel (TR)
- 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:
MSP430F1122IDWR FAQ
1.How can I place an order for MSP430F1122IDWR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F1122IDWR 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 MSP430F1122IDWR reliable?
The price and inventory of MSP430F1122IDWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F1122IDWR is usually 5 days.
3.What payment methods are accepted for MSP430F1122IDWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F1122IDWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F1122IDWR?
MSP430F1122IDWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F1122IDWR 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 MSP430F1122IDWR?
For technical support, including MSP430F1122IDWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F1122IDWR requirements.
6.How does Aetrix verify that MSP430F1122IDWR is sourced from the original manufacturer or authorized distributors?
All MSP430F1122IDWR 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 MSP430F1122IDWR meets industry standards.
7.What is the process for return or replacement of MSP430F1122IDWR?
All MSP430F1122IDWR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F1122IDWR, 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 MSP430F1122IDWR part is unused and in its original packaging.
Return procedure for MSP430F1122IDWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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