ICS845204

CRYSTAL-TO-MLVDS CLOCK SYNTHESIZER W/SPREAD SPECTRUM

ADVANCE INFORMATION

IDT™ / ICS™ M-LVDS CLOCK SYNTHESIZER

2

ICS845204AK SEPTEMBER 25, 2007

Table 1. Pin Descriptions

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

Table 2. Pin Characteristics

Number

Name

Type

Description

1

OE0

Input

Pullup

Output enable pin for Q0/nQ0 outputs. Logic High, outputs are enabled.

Logic LOW, outputs are in Hi-Z. LVCMOS/LVTTL interface levels.

2, 11

Power

Core supply pins.

3, 4

nQ3, Q3

Output

Differential output pair. M-LVDS interface levels.

Power

Output supply pin.

6, 8, 18, 23,

24, 27

nc

Unused

No connect.

7

FSEL0

Input

Pullup

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

9

FSEL1

Input

Pulldown

Output frequency select pin. See Table 3A. LVCMOS/LVTTL interface levels.

10,

19

SSC0,

SSC1

Input

Pullup

Spread spectrum control pins. See Table 3B. LVCMOS/LVTTL interface levels.

12

OE3

Input

Pullup

Output enable pin for Q3/nQ3 outputs. Logic High, outputs are enabled.

Logic LOW, outputs are in Hi-Z. LVCMOS/LVTTL interface levels.

13,

14

XTAL_IN

XTAL_OUT

Input

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

15

OE2

Input

Pullup

Output enable pin for Q2/nQ2 outputs. Logic High, outputs are enabled.

Logic LOW, outputs are in Hi-Z. LVCMOS/LVTTL interface levels.

16, 17, 22, 30

GND

Power

Power supply ground.

20, 21

nQ2, Q2

Output

Differential output pair. M-LVDS interface levels.

25, 26

nQ1, Q1

Output

Differential output pair. M-LVDS interface levels.

28

Power

Analog supply pin.

29

OE1

Input

Pullup

Output enable pin for Q1/nQ1 outputs. Logic High, outputs are enabled.

Logic LOW, outputs are in Hi-Z. LVCMOS/LVTTL interface levels.

31, 32

nQ0, Q0

Output

Differential output pair. M-LVDS interface levels.

Symbol

Parameter

Test Conditions

Minimum

Typical

Maximum

Units

Input Capacitance

4

pF

Input Pullup Resistor

51

k

Ω

Input Pulldown Resistor

51

k

Ω