ICS844251BGI-14 REVISION A June 6, 2016

2

©2016 Integrated Device Technology, Inc.

ICS844251I-14 Data Sheet

FEMTOCLOCK™ CRYSTAL-TO-LVDS CLOCK GENERATOR

Table 1. Pin Descriptions

NOTE: Pulldown refers to internal input resistors. See Table 2, Pin Characteristics, for typical values.

Table 2. Pin Characteristics

Number

Name

Type

Description

1VDDA

Output

Analog supply pin.

2

GND

Power

Power supply ground.

3,

4

XTAL_OUT

XTAL_IN

Input

Crystal oscillator interface. XTAL_IN is the input, XTAL_OUT is the output.

5

FREQ_SEL

Input

Pulldown

Frequency select pin. LVCMOS/LVTTL interface levels.

6, 7

nQ, Q

Output

Differential output pair. LVDS interface levels.

8VDD

Power

Core supply pin.

Symbol

Parameter

Test Conditions

Minimum

Typical

Maximum

Units

CIN

Input Capacitance

4pF

RPULLDOWN Input Pulldown Resistor

51

k

