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SI4770

HIGH-PERFORMANCE CONSUMER ELECTRONICS BROADCAST RADIO RECEIVER AND HD RADIO TUNER

Silicon Laboratories 

Si4770/77-A20

Table 5. Reference Clock and Crystal Characteristics

Parameter

Symbol

Test Condition

Reference Clock, Pin RCLK

RCLK Supported

Frequencies

Min

Typ

Max

Unit

—

36.4

—

37.8

37.209375

MHz

RCLK Frequency

Tolerance

RCLK = 36.4 MHz, 37.8 MHz, 37.209375 MHz

Phase Noise

100 Hz offset

1 kHz offset

Input Capacitance

10 kHz offset

≥ 100 kHz offset

Input Voltage

AC coupling capacitor = 1 µF

Square wave input

AC coupling capacitor = 1 µF

Sine wave input

Crystal Oscillator, Pins XTAL1, XTAL2

Crystal Frequency

–100

—

100

—

—

–86

—

—

–101

—

—

–108

—

—

–122

—

7

—

400

300

—

900

—

36.4

—

37.8

37.209375

ppm

dBc/Hz

dBc/Hz

dBc/Hz

dBc/Hz

pF

mVPP

mVPP

MHz

Crystal Frequency

Tolerance

Load Capacitance, Pro-

grammable, Each Pin to

GND

–100

—

100

ppm

5

—

21.8

pF

Rev. 0.9

9

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