SI4021-A1-FT1R

Description：RF TX IC FSK 433/868MHZ 16TSSOP
Series：EZRadio®
Mfr：Silicon Labs
Package：Tape & Reel (TR)

SKU:bc3773d0a9d0 Category: RF Transmitters Brand: Silicon Labs

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Product introduction

SI4021-A1-FT1R is listed in the RF Transmitter range at ChipApex. The manufacturer field lists Silicon Labs. Its product description is RF TX IC FSK 433/868MHZ 16TSSOP. Review the specifications below when checking this part for your BOM.

RF Transmitter specifications for SI4021-A1-FT1R

Description：RF TX IC FSK 433/868MHZ 16TSSOP
Series：EZRadio®
Mfr：Silicon Labs
Package：Tape & Reel (TR)
Frequency：-
Applications：-
Modulation or Protocol：-
Data Rate (Max)：-
Power - Output：-
Current - Transmitting：-
Data Interface：-
Antenna Connector：-
Memory Size：-
Features：-
Voltage - Supply：-
Operating Temperature：-
Mounting Type：Surface Mount
Package / Case：16-TSSOP (0.173", 4.40mm Width)
Supplier Device Package：16-TSSOP
Grade：-
Qualification：-

RF Transmitter datasheet and documents for SI4021-A1-FT1R

SI4021-A1-FT1R

RF Transmitter Overview

The SI4021-A1-FT1R is a Sub-GHz RF transceiver from Silicon Labs, designed for FSK modulation within the 430.24 MHz to 929.27 MHz frequency range. It supports data rates up to 256 kb/s and operates on a supply voltage between 2.2 V and 3.8 V. The device features an SPI interface and is housed in a TSSOP-16 package. Key electrical parameters include a receive current of 13 mA, transmit current of 24 mA, output power of 7 dBm, and sensitivity of -110 dBm. It functions within a temperature range of -40°C to +85°C.

RF Transmitter Feature Summary

Supports FSK modulation for reliable wireless communication
Integrated low-power operation with defined current consumption profiles
Compatible with standard SPI digital interfaces for system integration

RF Transmitter Applications

Wireless sensor networks
Remote control systems
Metering applications

RF Transmitter Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm package integrity and pin alignment against TSSOP-16 specifications. Validate lot codes and date codes to ensure compliance with historical manufacturing standards. Cross-reference datasheet revisions to confirm parameter consistency before procurement.

RF Transmitter Selection Notes

Evaluate compatibility with existing SPI controller logic levels and voltage domains. Assess thermal management requirements given the operating temperature range. Consider antenna matching network design for the specific Sub-GHz frequency band. Review power budget constraints against the specified transmit and receive currents.

RF Transmitter Part Context

This component belongs to the Si4421/Si4021 family of wireless transceivers. It shares architectural similarities with other EZRadio devices but differs in specific frequency coverage and pinout configurations. The part represents a legacy solution for Sub-GHz applications requiring moderate data rates.