Si4463-C2A-GM ISM Sub-GHz Transceiver
Sub-GHz ISM transceiver with differential RF LNA input, open-drain PA output, 4-line serial interface, GPIOs, nIRQ and 25-32 MHz crystal oscillator interface.
Aliase:Si4464, Si4463, Si4461, Si4460
QFN20 4x4mm Top View
21 Pins
Pinout Table21
| Pin | Signal / Name | Type | Alternative Functions |
|---|---|---|---|
| 1 | SDN | Digital | Shutdown input, active high. Keep at 0 except in shutdown mode |
| 2 | RXp | Analog | Differential RF input of LNA (positive) |
| 3 | RXn | Analog | Differential RF input of LNA (negative) |
| 4 | TX | Analog | Transmit output, open-drain PA output needing VDD via L-C match |
| 5 | NC | NC | No connect, not connected internally |
| 6 | VDD | Power | Supply voltage input to internal regulators, 1.8 to 3.6 V |
| 7 | TXRAMP | Analog | Programmable bias output with ramp for external FET PA |
| 8 | VDD | Power | Supply voltage input to internal regulators, 1.8 to 3.6 V |
| 9 | GPIO0 | Digital | General purpose digital I/O, configurable function |
| 10 | GPIO1 | Digital | General purpose digital I/O |
| 11 | ~IRQ | Digital | Interrupt status output, active low |
| 12 | SCLK | Digital | Serial clock input for 4-line serial bus |
| 13 | SDO | Digital | Serial data readback output |
| 14 | SDI | Digital | Serial data input for 4-line serial bus |
| 15 | ~SEL | Digital | Serial interface select input, active low |
| 16 | XOUT | Analog | Crystal oscillator output, leave floating when driven on XIN |
| 17 | XIN | Analog | Crystal oscillator input, 25 to 32 MHz crystal or external source |
| 18 | GND | Ground | Connect to PCB ground |
| 19 | GPIO2 | Digital | General purpose digital I/O, configurable function |
| 20 | GPIO3 | Digital | General purpose digital I/O, configurable function |
| EP | PADDLE_GND | Ground | Exposed paddle, RF and circuit ground, solder to PCB ground plane |