Si473x-B20

4

Rev. 0.5

1. Product Overview

The Si473x receivers are the industry's first fully-integrated multiband radio receiver ICs from antenna input to

audio output. They require minimal external components with no factory alignment. The Si473x receivers reduce

the receiver footprint by >90% versus traditional AM/FM solutions. The Si473x also offer best-in-class performance

with the most features. The high integration and complete system production test simplifies design-in, increases

system quality, and improves manufacturability.

The Si473x receivers include advanced seek algorithms, adjustable soft mute, auto-calibrated digital tuning, and

FM stereo processing. In addition, the Si473x ICs provide a programmable reference clock and an I2C-compatible

2-wire control interface.

The Si4731/35/37/39 incorporates a digital processor for the European Radio Data System (RDS) and the North

American Radio Broadcast Data System (RBDS), including all required symbol decoding, block synchronization,

error detection, and error correction functions. Using these features, the Si4731/35/37/39 enables broadcast data

such as station identification and song name to be displayed to the end user.

2. Electrical Specifications

Table 1. Recommended Operating Conditions

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

Supply Voltage

2.7

—

5.5

V

Interface Supply Voltage

1.5

—

3.6

V

Power Supply Powerup Rise Time

10

—

—

µs

Interface Power Supply Powerup Rise Time

10

—

—

µs

Ambient Temperature

–20

25

85

C

Note: All minimum and maximum specifications are guaranteed and apply across the recommended operating conditions.

otherwise stated.