EV1527

The EV1527 is an encoder integrated circuit (IC) developed by Silvan Chip Electronics Tech. Co., Ltd. It has become a de facto standard in affordable remote controls due to its widespread adoption.

This IC defines an encoding scheme that transmits 24-bit ID numbers using On-Off Keying (OOK). The EV1527 chip includes four data pins, enabling remote controls with up to four distinct ID codes or channels. The first 20 bits of the ID number represent a unique identifier assigned by the manufacturer, differentiating each remote control. The remaining 4 bits correspond to the state of the four available channels, typically linked to remote control buttons.

EV1527 exclusively handles signal processing and is independent of the transport layer. In practice, it is commonly used with license-free RF ISM bands, such as 315MHz in the US and 433MHz in Europe and Asia. EV1527-compliant PCBs typically pair the encoder chip with an OOK transmitter or receiver, simplifying wireless communication by offloading complex signal processing.

Many manufacturers produce chips capable of encoding and decoding EV1527-compatible data, including Utmel. Generic unmarked chips on budget-friendly PCBs also often implement this functionality.