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MSP430F2121IDWR
Texas Instruments
IC MCU 16BIT 4KB FLASH 20SOIC
3772 Pcs New Original In Stock
MSP430 CPU16 MSP430F2xx Microcontroller IC 16-Bit 16MHz 4KB (4K x 8 + 256B) FLASH 20-SOIC
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5.0 / 5.0
- (380 Ratings)
MSP430F2121IDWR
Product Overview
1349907
DiGi Electronics Part Number
MSP430F2121IDWR-DGManufacturer
Texas Instruments
MSP430F2121IDWR
Description
IC MCU 16BIT 4KB FLASH 20SOICInventory
3772 Pcs New Original In Stock
MSP430 CPU16 MSP430F2xx Microcontroller IC 16-Bit 16MHz 4KB (4K x 8 + 256B) FLASH 20-SOIC
Quantity
Minimum 1
Minimum 1
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MSP430F2121IDWR Technical Specifications
Category
Embedded, Microcontrollers
Packaging
Cut Tape (CT) & Digi-Reel®
Series
MSP430F2xx
Product Status
Active
DiGi-Electronics Programmable
Not Verified
Core Processor
MSP430 CPU16
Core Size
16-Bit
Speed
16MHz
Connectivity
-
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O
16
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-SOIC
Package / Case
20-SOIC (0.295", 7.50mm Width)
Base Product Number
MSP430F2121
Datasheet & Documents
Manuals
MSP430x2xx User Guide
Manufacturer Product Page
MSP430F2121IDWR Specifications
HTML Datasheet
MSP430F2121IDWR-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
296-18113-2
296-18113-1
296-18113-6
2156-MSP430F2121IDWR
-296-18113-1
-296-18113-1-DG
TEXTISMSP430F2121IDWR
-MSP430F2121IDWR-NDR
Standard Package
2,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
가격이 착한데 포장도 친환경이라 믿고 구매하게 돼요.
de desembre 02, 2025
The customer service team shows genuine care and professionalism.
de desembre 02, 2025
Speedy delivery and attentive after-sales support made me a loyal customer.
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Frequently Asked Questions (FAQ)
When designing in the MSP430F2121IDWR, how do I ensure stable operation under marginal power supply conditions in a battery-powered sensor node?
The MSP430F2121IDWR operates from 1.8V to 3.6V, making it suitable for battery-powered applications, but voltage droop during RF transmission or sensor bursts can trigger brown-out resets. To ensure stable operation, use a low-quiescent current LDO with tight load regulation and bypass the supply with a 10µF X7R ceramic capacitor close to Vcc pins. Enable the built-in brown-out reset (BOR) module and consider setting a higher BOR threshold (e.g., 2.2V) via software if your system uses Li-MnO2 or supercapacitor backup. Monitor supply transients with an oscilloscope during active and LPM3 modes to validate reset integrity.
Can the MSP430F2121IDWR replace an aging MSP430F2013 in an existing design without board modifications?
Yes, the MSP430F2121IDWR is a functionally compatible drop-in replacement for the MSP430F2013 in most cases, sharing the same 20-SOIC package, pinout, and core architecture. However, verify that the program memory requirement of your firmware does not exceed the MSP430F2121IDWR’s 4KB flash, which is slightly less than the F2013’s 2KB + 512B information memory. Also, confirm peripheral register mappings for timers and ADC—while largely identical, minor differences may require firmware adjustments. Test all low-power modes to ensure current consumption meets expectations.
What are the risks of using the internal slope A/D converter in the MSP430F2121IDWR for precision temperature sensing?
The MSP430F2121IDWR's on-chip slope A/D converter lacks precision references and has limited resolution (~10-bit effective), making it sensitive to supply noise and temperature drift. For accurate temperature sensing using NTC or thermistors, include a stable external voltage reference (e.g., REF3025) and implement oversampling with firmware filtering (e.g., moving average or FIR). Avoid sharing the analog input pin with digital switching signals to reduce crosstalk. Validate accuracy over the full -40°C to 85°C range using calibration at two or more temperature points.
How can I minimize current consumption in LPM3 mode when using the MSP430F2121IDWR in a wireless IoT endpoint?
To minimize current in LPM3 with the MSP430F2121IDWR, disable all unused peripherals (e.g., ADC, Timer_A) via their control registers, set unused I/O pins as output low or high (avoid floating), and ensure the DAC and comparator are powered down. Use the internal VLO clock for the WDT+ as an interval wake-up source, but verify its drift (±20%) doesn’t affect timing accuracy. Measure ISUPPLY with a picoammeter to detect unexpected leakage—common culprits include pull-up resistors on disabled peripherals or PCB contamination. Aim for <1.5 µA typical, aligning with TI’s datasheet claims.
Is the MSP430F2121IDWR recommended for new designs given newer alternatives like the MSP430FR2000?
While the MSP430F2121IDWR is still active and reliable, newer FRAM-based devices like the MSP430FR2000 offer advantages in write endurance, lower write energy, and higher EEPROM equivalent emulation performance. However, if your design relies on proven stability, minimal code footprint, or legacy toolchain compatibility, the MSP430F2121IDWR remains viable. Evaluate total system cost and long-term availability—the MSP430F2121IDWR may be preferred in cost-sensitive, low-complexity applications with moderate update requirements. Check TI’s product roadmap to confirm extended support timelines before committing.
Quality Assurance (QC)
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MSP430F2121IDWR CAD Models
Texas Instruments MSP430F2121IDWR PCB symbols & footprints
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