843751 Data Sheet

FEMTOCLOCK™ SAS/SATA CLOCK GENERATOR

843751 REVISION B 08.21.15

2

©2015 Integrated Device Technology, Inc.

Table 1. Pin Descriptions

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

Table 2. Pin Characteristics

Function Tables

Table 3. SSC_SEL[1:0] Function Table

Number

Name

Type

Description

1,

2

XTAL_OUT,

XTAL_IN

Input

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

3,

4

SSC_SEL0,

SSC_SEL1

Input

Pulldown

SSC select pins. See Table 3A. LVCMOS/LVTTL interface levels.

5VCC

Power

Power supply pin.

6, 7

Q, nQ

Output

Differential clock outputs. LVPECL interface levels.

8VEE

Power

Negative supply pin.

Symbol

Parameter

Test Conditions

Minimum

Typical

Maximum

Units

CIN

Input Capacitance

4pF

RPULLDOWN

Input Pulldown Resistor

51

k



Inputs

Mode

SSC_SEL1

SSC_SEL0

0 (default)

0 (default)

SSC Off

0

1

0.5% Down-spread

1

0

0.5% Up-spread

1

1

0.5% Center-spread