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Texas Instruments MSP430G2121IRSA16T — Microcontrollers & Processors (MCU / MPU / DSP)

TI MSP430G2121IRSA16T 16-Bit MCU, 16 MHz, 1 KB Flash, 16-QFN

MPNMSP430G2121IRSA16T
NRND

Texas Instruments MSP430G2xx series 16-bit MCU, MSP430G2121IRSA16T, 16 MHz CPU, 1 KB Flash, 128 B RAM, I²C, SPI, 10 I/O, 1.8 V–3.6 V, -40°C to 85°C, 16-QFN (4x4) exposed pad, Tape & Reel.

$1.1193Ref. price · indicative, final on quote
Texas Instruments MSP430G2121IRSA16T datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

MSP430G2121IRSA16T specifications
ParameterValue
SeriesMSP430G2xx
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.8V ~ 3.6V
Operating temperature-40°C~85°C(TA)
Speed16MHz
PackageTape & Reel (TR)
RAM size128 x 8
Core size16-Bit
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
ConnectivityI²C, SPI
Number of i (O)10
Core processorMSP430 CPU16
Case16-VQFN Exposed Pad
Program memory size1KB (1K x 8)

Product details

The Texas Instruments MSP430G2121IRSA16T is a 16-bit MCU from the MSP430G2xx series, clocked at 16 MHz with 1 KB of Flash program memory and 128 bytes of RAM.

TI lists the MSP430G2121IRSA16T as Not Recommended for New Designs (NRND). That means the part is still available for existing production runs, but TI will not invest in new wafer starts or extended lifetime buys. For a BOM freeze or a new design, the safer path is to evaluate a current-production MSP430G2xx or MSP430FRxx sibling with compatible pinout and memory footprint.

I/O and serial interface

Ten digital I/O lines are available, with hardware I²C and SPI modules on dedicated pins.

Frequently asked questions

What is the closest pin-compatible alternative to MSP430G2121IRSA16T?

TI does not list a direct pin-compatible successor for this exact order code. Within the MSP430G2xx family, parts with higher Flash density (e.g., 2 KB or 4 KB) often share the same 16-QFN footprint and peripheral set — check the specific device datasheet for pin compatibility before substituting.

What is MSP430G2121IRSA16T's listed speed?

The CPU runs at 16 MHz, which is the maximum clock frequency supported by the internal oscillator or an external clock source.

Where can I buy MSP430G2121IRSA16T and how is it quoted?

We source this NRND part to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time.