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MSP430F1121AIPWR
Texas Instruments
IC MCU 16BIT 4KB FLASH 20TSSOP
3687 Pcs New Original In Stock
MSP430 CPU16 MSP430x1xx Microcontroller IC 16-Bit 8MHz 4KB (4K x 8 + 256B) FLASH 20-TSSOP
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5.0 / 5.0
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MSP430F1121AIPWR
Product Overview
1344009
DiGi Electronics Part Number
MSP430F1121AIPWR-DGManufacturer
Texas Instruments
MSP430F1121AIPWR
Description
IC MCU 16BIT 4KB FLASH 20TSSOPInventory
3687 Pcs New Original In Stock
MSP430 CPU16 MSP430x1xx Microcontroller IC 16-Bit 8MHz 4KB (4K x 8 + 256B) FLASH 20-TSSOP
Quantity
Minimum 1
Minimum 1
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MSP430F1121AIPWR Technical Specifications
Category
Embedded, Microcontrollers
Packaging
Cut Tape (CT) & Digi-Reel®
Series
MSP430x1xx
Product Status
Active
DiGi-Electronics 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)
Mounting Type
Surface Mount
Supplier Device Package
20-TSSOP
Package / Case
20-TSSOP (0.173", 4.40mm Width)
Base Product Number
MSP430F1121
Datasheet & Documents
Manufacturer Product Page
MSP430F1121AIPWR Specifications
HTML Datasheet
MSP430F1121AIPWR-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.31.0001
Additional Information
Other Names
296-26173-2
TEXTISMSP430F1121AIPWR
296-26173-6
2156-MSP430F1121AIPWR
296-26173-1
MSP430F1121AIPWR-DG
Standard Package
2,000
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
The consistent quality of their delivery service reflects their high standards.
de desembre 02, 2025
The combination of quick shipping and durable offerings makes them stand out in the electronics community.
de desembre 02, 2025
My shipment arrived a day earlier than expected, and the product’s performance has been flawless so far.
de desembre 02, 2025
I've never experienced delays or issues with their products’ reliability.
de desembre 02, 2025
DiGi Electronics ensures their products are well-protected during shipping.
de desembre 02, 2025
Excellent value for money—DiGi Electronics offers competitive pricing without sacrificing quality.
de desembre 02, 2025
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Frequently Asked Questions (FAQ)
What are the real-world trade-offs when using the TI MSP430F1121AIPWR with only 14 GPIOs in a battery-powered sensor node that needs six ADC channels, three I²C devices, and UART debug access?
In this MSP430F1121AIPWR design challenge, port-sharing is mandatory because 14 pins must cover power, reset, and your listed signals. Assign P1.0–P1.7 as dual-purpose: external sensor ADC (up to 8 slope-ADC channels) plus bit-banged I²C on two pins; reserve P2.0/P2.1 for hardware UART. Use 256-B RAM to execute software I²C to avoid external logic, but budget 2 mA extra active current vs. a hardware I²C MCU; for battery life, drop to 1-MHz MCLK and rely on the on-chip 12-kHz VLO for sleep wake-up every 8 s. If pin count becomes critical, migrate to MSP430G2553IPW20; it is code-compatible and adds hardware I²C/USCI, yet in TSSOP-20 keeps the same PCB footprint so you do not respin the board, only reset the BOM allocation and re-qualify 2.2-V brown-out levels.
Can the MSP430F1121AIPWR oscillator and 4 KB FLASH safely operate at -30 °C for 10-year data-logger reliability, or does this require external crystal and ECC firmware?
TI specs the MSP430F1121AIPWR internal RC oscillator at ±15 % over –40 °C to 85 °C, which is fine for UART below 9600 bps but drifts too much for 115 k or precise time-stamping in a 10-year logger. Add a 32.768 kHz watch crystal on XIN/XOUT: load caps 12 pF C0G, ESR < 50 kΩ; this keeps RTC error under ±2 min/year and removes the flash-writing time-stamp drift risk. 4 KB FLASH endurance is 100 k erase cycles; to reach 10 years at one 64-byte write per minute, enable the on-chip 16-bit CRC and implement a wear-levelling ring buffer in the top 2 KB, limiting any single sector to ~30 k cycles, within spec. Do not use the info-A segment for frequent writes—its endurance is identical, but a failed sector there bricks factory calibration constants.
Replacing an old MSP430F1121 (no ‘A’) with the MSP430F1121AIPWR in an existing socket caused LED ghosting—did the port-drive strength change, and how do I fix it without a new PCB?
The MSP430F1121AIPWR revision raised P1/P2 source/sink from 2 mA to 6 mA at 3 V to meet fast-slope timing; if the original design relied on 2 mA current limit to dim LEDs without resistors, the extra drive now over-charges FET gate capacitance and couples into neighboring traces. Quick board-level fix: solder 330 Ω 0603 in series with each LED on the backside pads, or enable reduced-drive bits (P1DS = 0) in the PxDS register—present only in the ‘A’ revision—to revert the buffer strength and maintain legacy luminance without a re-spin.
How do I migrate firmware from 3.3 V STM8S003F3 to 2.2 V MSP430F1121AIPWR without rewriting the whole codebase when external open-drain sensors need 5 V logic tolerance?
The MSP430F1121AIPWR has no 5 V-tolerant pins, unlike STM8S. Insert a bidirectional NXP NLSX4378 level-shifter between MSP430 ports and 5 V sensors; it auto-detects direction and keeps 2 ns skew, preserving your SPI timing. Recompile STM8 C-source with TI’s CCE v7.2: map STM8 GPIO ‘PD_ODR’ calls to MSP430 PxOUT, convert 16-bit timer auto-reload constant from STM8 prescaler (Fmaster = 16 MHz) to MSP430 SMCLK (8 MHz), halving overflow value. Validate 256 B RAM usage—STM8S has 1 KB; if stack exceeds 80 B, move constant look-up tables to FLASH with the ‘const’ keyword to avoid runtime stack overflow in the lower-voltage part.
Is the MSP430F1121AIPWR 20-TSSOP package pinout drop-in compatible with Microchip PIC16F1823T-I/SL for a solar energy harvester, and what passive component changes are required?
Pin count and pitch match, but PIC pin-4 is Vpp/RESET with internal weak pull-up while MSP430F1121AIPWR pin-4 is /RST tied to an NMI-style edge detector. Lift the PIC's 10 kΩ pull-up to VDD on the PCB because MSP430 needs < 50 kΩ total pull-down to guarantee reset release below 1.8 V; replace by 47 kΩ to VDD plus an optional 1 nF C to ground to keep 2 ms power-on delay. PIC pin-2-3 are crystal pins but on MSP430 they are P2.6/P2.7; leave your 32 kHz crystal in place, just populate 12 pF load caps, not the 15 pF used for PIC—MSP430 internal oscillator caps are 6 pF, so 12 pF external gives 18 pF total as required for Abracon ABS25 crystal. Finally, verify your 2-layer 1 oz copper solar-cell peak 3.6 V stays below the 3.8 V absolute max of the MSP430F1121AIPWR; if cold temperature pushes Voc higher, clip with an MCP1700T-3.3 LDO to protect the MSP430.
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MSP430F1121AIPWR CAD Models
Texas Instruments MSP430F1121AIPWR PCB symbols & footprints
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