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Texas Instruments MSP430F1121AIPWR
- Part No.:
- MSP430F1121AIPWR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MSP430F1121AIPWR.pdf
- Description:
- IC MCU 16BIT 4KB FLASH 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:12,426
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Product details
Overview
MSP430F1121AIPWR from Texas Instruments is an ultralow-power 16-bit RISC mixed-signal microcontroller with 4KB + 256B flash memory, 256B RAM, and integrated Timer_A3, analog comparator, and 14 I/O pins. It operates from 1.8 V to 3.6 V, achieves 160 μA active current at 1 MHz/2.2 V, and wakes from standby in under 6 μs - optimized for battery-powered sensor nodes and portable measurement systems.
For engineers reviewing the MSP430F1121AIPWR datasheet, MSP430F1121AIPWR pinout, MSP430F1121AIPWR application, or MSP430F1121AIPWR equivalent, key selection criteria include flash-based programmability, sub-1 μA LPM3/LPM4 standby current, 20-pin TSSOP (PW) package compatibility, and integrated slope A/D capability via I/O pins on resistive sensors.
Technical Context
The MSP430F1121AIPWR implements a 16-bit CPU with seven addressing modes and constant generators for high code efficiency. Its basic clock module supports multiple sources: internal DCO (stabilizes <6 μs), 32-kHz crystal, high-frequency crystal, resonator, or external clock - enabling flexible low-power system timing.
It integrates Timer_A3 with three capture/compare registers for PWM, interval timing, and event capture; a comparator supporting slope A/D conversion and battery monitoring; and two 8-bit I/O ports (14 total usable pins, P1.0–P1.7 and P2.0–P2.5), all with individually configurable direction, pull-up/down, and edge-selectable interrupts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 125 ns instruction cycle; register-to-register ops execute in one MCLK cycle |
| Memory | 4KB + 256B flash program memory; 256B RAM; boot ROM included for BSL UART programming |
| Supply Voltage | 1.8 V to 3.6 V operating range; 2.7 V minimum required for flash programming/erase |
| Power Consumption | Active mode: 160 μA @ 1 MHz/2.2 V; LPM3: 0.7 μA @ 25°C; LPM4: 0.1 μA @ 25°C |
| Wake-Up Time | <6 μs from LPM3/LPM4 to active mode using internal DCO clock source |
| Timer & Analog | Timer_A3 with three capture/compare registers; comparator with CA0/CA1 inputs and CAOUT output |
| Operating Temperature | −40°C to +85°C industrial grade rating |
Pinout & Package
Package: 20-pin Plastic Small-Outline Thin (TSSOP), suffix PW - body width 4.4 mm, lead pitch 0.65 mm, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 2) | Supply voltage input | Primary power rail; decoupling capacitor required near pin |
| VSS (Pin 4) | Ground reference | System ground return; connects to PCB ground plane |
| RST/NMI (Pin 7) | Reset / nonmaskable interrupt | Pulled low to reset CPU; rising edge triggers NMI if enabled |
| XIN (Pin 6), XOUT (Pin 5) | Crystal oscillator inputs | Supports 32.768 kHz watch crystal or up to 8 MHz high-frequency crystal |
| P1.0–P1.7 (Pins 13–20) | General-purpose I/O port | 8-bit bidirectional port with individual direction/interrupt control; P1.0–P1.3 support Timer_A capture/compare |
| P2.0–P2.5 (Pins 8–12, 3) | General-purpose I/O port | 6-bit bidirectional port; P2.2–P2.4 serve as comparator inputs (CA0/CA1) and outputs (CAOUT) |
| TEST (Pin 1) | JTAG test interface enable | Used during programming/fuse blowing; must be pulled high for normal operation |
| P2.5/ROSC (Pin 3) | DCO resistor input | Connects external resistor to set nominal DCO frequency; enables fast wake-up without crystal |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow-power operation | Sub-1 μA standby (LPM3/LPM4) extends battery life in intermittent-sensing applications |
| Integrated slope A/D | Comparator + GPIO enables single-slope conversion on resistive sensors without external ADC |
| On-chip BSL | UART-based bootloader allows field firmware updates via P1.1 (TX) and P2.2 (RX) without JTAG hardware |
| Five low-power modes | LPM0–LPM4 provide granular power/performance trade-offs for real-time responsiveness vs energy savings |
| Flash memory security | Programmable fuse prevents unauthorized read-out of flash contents after programming |
Applications
| Wireless Sensor Node | Battery-Powered Data Logger |
|---|---|
Use Scenario: Compact environmental sensor node measuring temperature/humidity and transmitting data via RF link. IC Role / Device Role / Timing Role: Central controller managing sensor acquisition, low-power sleep scheduling, and RF interface timing. Use Value: Sub-1 μA LPM4 current enables multi-year operation on coin-cell batteries; fast wake-up ensures precise RF transmission timing. | Use Scenario: Portable device logging voltage, current, or vibration over hours/days using internal timer and analog inputs. IC Role / Device Role / Timing Role: Standalone data acquisition unit with internal slope A/D, flash storage, and real-time clock via ACLK. Use Value: Integrated comparator and Timer_A3 eliminate external components for analog-to-digital conversion and time-stamped sampling. |
| Portable Medical Monitor | Industrial Control Interface |
Use Scenario: Wearable pulse oximeter or glucose meter requiring low EMI, long battery life, and analog signal conditioning. IC Role / Device Role / Timing Role: Signal processor handling analog front-end comparison, LED drive timing, and user interface I/O. Use Value: Schmitt-trigger inputs reject noise on sensor lines; comparator accuracy supports precision threshold detection for physiological signals. | Use Scenario: Remote I/O module interfacing with switches, relays, and analog sensors in factory automation. IC Role / Device Role / Timing Role: Edge-sensitive interrupt handler for pushbutton inputs and periodic status polling via Timer_A3. Use Value: 14 GPIO pins with individual interrupt enable/edge select simplify wiring and reduce host MCU polling overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F1132IPW | Same 20-pin TSSOP package; adds 10-bit SAR ADC (12 channels) and 32KB flash | Required when higher-resolution analog acquisition or larger firmware footprint is needed | Select for designs needing integrated ADC instead of slope-based conversion |
| MSP430G2553IPW20 | Later-generation 20-pin TSSOP; 16KB flash, 512B RAM, enhanced USCI serial modules, but higher active current (220 μA @ 1 MHz) | Suitable for new designs prioritizing code space and serial flexibility over ultra-low standby | Choose when UART/SPI/I²C peripheral count outweighs sub-μA standby requirements |
Compared with MSP430F1132IPW and MSP430G2553IPW20, the MSP430F1121AIPWR delivers the lowest standby power and smallest flash footprint in the 20-pin TSSOP form factor - making it optimal for cost- and energy-constrained legacy-compatible sensor endpoints where slope A/D suffices.
Availability
MSP430F1121AIPWR is available at Aetrix Electronics and suitable for wireless sensor nodes, battery-powered data loggers, portable medical monitors, and industrial control interfaces requiring stable component supply across extended production lifecycles.
Supply support for MSP430F1121AIPWR 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 MSP430x11x1(A) product line targets ultralow-power portable measurement applications - emphasizing extended battery life through aggressive low-power modes, integrated analog peripherals, and efficient 16-bit RISC execution.
FAQ
What is the maximum operating frequency of the MSP430F1121AIPWR?
The MSP430F1121AIPWR supports a maximum system clock (MCLK) frequency of 8 MHz at 3.6 V supply, and 4.15 MHz at 1.8 V. This is achieved using the internal digitally controlled oscillator (DCO) or external crystal/resonator sources. The CPU executes instructions at 125 ns per cycle, enabling deterministic real-time response in time-critical sensor applications. MSP430F1121AIPWR performance scales linearly with supply voltage per published electrical characteristics.
Does the MSP430F1121AIPWR support in-system programming?
Yes, the MSP430F1121AIPWR supports in-system programming via its integrated bootstrap loader (BSL), accessible through UART using P1.1 (TX) and P2.2 (RX) pins. It also supports JTAG programming via TEST, TCK, TMS, TDI, and TDO pins. Flash memory can be programmed byte- or word-wise by the CPU itself, enabling firmware updates without external hardware programmers. MSP430F1121AIPWR BSL access is protected by a user-configurable password.
What low-power modes does the MSP430F1121AIPWR offer?
The MSP430F1121AIPWR provides six operating modes: Active Mode (AM) and five software-selectable low-power modes (LPM0–LPM4). LPM3 disables MCLK/SMCLK while retaining ACLK for real-time clock functions at 0.7 μA; LPM4 shuts down all clocks including ACLK for 0.1 μA retention. Wake-up from any LPM to AM takes under 6 μs using the DCO. MSP430F1121AIPWR's LPM selection directly impacts battery lifetime in duty-cycled sensor applications.
Can the MSP430F1121AIPWR perform analog-to-digital conversion without an external ADC?
Yes, the MSP430F1121AIPWR uses its integrated Comparator_A module with GPIO pins to implement single-slope analog-to-digital conversion. By charging a capacitor through a resistive sensor and comparing against a reference ramp, it achieves digitization using only internal resources. This eliminates the need for external ADC components in simple threshold or relative measurement applications. MSP430F1121AIPWR's CA0/CA1 inputs and CAOUT output are specifically routed for this function.
What is the package type and pin count of the MSP430F1121AIPWR?
The MSP430F1121AIPWR is packaged in a 20-pin Plastic Small-Outline Thin (TSSOP) package, designated "PW" in TI documentation. It measures 6.5 mm × 4.4 mm with 0.65 mm lead pitch and is RoHS-compliant. This package is pin-compatible with other MSP430F11x1A variants in the same family, including MSP430F1101AIPW and MSP430F1111AIPW. MSP430F1121AIPWR shares identical mechanical and thermal characteristics with these variants.
MSP430F1121AIPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Series:
- MSP430x1xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Verified
- Core Processor:
- MSP430 CPU16
- Core Size:
- 16-Bit
- Speed:
- 8MHz
- Connectivity:
- -
- Peripherals:
- POR, 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:
- Slope A/D
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430F1121AIPWR FAQ
1.How can I place an order for MSP430F1121AIPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F1121AIPWR 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 MSP430F1121AIPWR reliable?
The price and inventory of MSP430F1121AIPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F1121AIPWR is usually 5 days.
3.What payment methods are accepted for MSP430F1121AIPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F1121AIPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F1121AIPWR?
MSP430F1121AIPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F1121AIPWR 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 MSP430F1121AIPWR?
For technical support, including MSP430F1121AIPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F1121AIPWR requirements.
6.How does Aetrix verify that MSP430F1121AIPWR is sourced from the original manufacturer or authorized distributors?
All MSP430F1121AIPWR 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 MSP430F1121AIPWR meets industry standards.
7.What is the process for return or replacement of MSP430F1121AIPWR?
All MSP430F1121AIPWR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F1121AIPWR, 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 MSP430F1121AIPWR part is unused and in its original packaging.
Return procedure for MSP430F1121AIPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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