16 MHz, 4 KB Flash — sizing the part for the job
The 16 MHz clock is the same across the MSP430G2xx value line. The MSP430G2303IN20 has 4 KB Flash and 256 bytes RAM.

Texas Instruments MSP430G2303IN20, MSP430G2xx series 16-bit MCU, 16MHz, 4KB Flash, 256 x 8 RAM, 20-DIP through-hole, -40°C to 85°C, 1.8V to 3.6V supply.
| Parameter | Value |
|---|---|
| Series | MSP430G2xx |
| Mounting | Through Hole |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 1.8V ~ 3.6V |
| Operating temperature | -40°C~85°C(TA) |
| Speed | 16MHz |
| Package | Tube |
| RAM size | 256 x 8 |
| Core size | 16-Bit |
| Peripherals | Brown-out Detect/Reset, PWM, WDT |
| Connectivity | I²C, IrDA, LINbus, SCI, SPI, UART/USART |
| Number of i (O) | 16 |
| Core processor | MSP430 CPU16 |
| Case | 20-DIP (0.300\", 7.62mm) |
| Program memory size | 4KB (4K x 8) |
The 16 MHz clock is the same across the MSP430G2xx value line. The MSP430G2303IN20 has 4 KB Flash and 256 bytes RAM.
Yes, the MSP430G2303IN20 is obsolete and no longer in production by Texas Instruments.
The MSP430G2403IN20 is the closest pin-compatible replacement — same 20-DIP package, 16 MHz core, but with 8 KB Flash and 512 bytes RAM.
We source the MSP430G2303IN20 through independent surplus distribution; submit an RFQ for current availability and pricing.
The supply voltage range is 1.8 V to 3.6 V.
The CPU runs at 16 MHz.
It belongs to the MSP430G2xx series.