ICS91720 View Datasheet(PDF) - Integrated Circuit Systems

Part Name

Description

MFG CO.

ICS91720

Low EMI, Spread Modulating, Clock Generator

Integrated Circuit Systems 

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ICS91720

Pin Description

PIN # PIN NAME

PIN DESCRIPTION

TYPE

1

CLKIN

PWR Input for reference clock.

2

VDD

IN Power supply, nominal 3.3V

3

GND

OUT Ground pin.

4

**CLKOUT/FS_IN0

I/O

Modulated clock output.

Frequency select latch input. Refer to the functionality table.

5

REF_OUT/FS_IN1*

I/O

Un-modulated 3.3V reference clock output.

Frequency select latch input. Refer to the functionality table.

6

SDATA

PWR Data pin for I2C circuitry 5V tolerant

7

SCLK

PWR Clock pin of I2C circuitry 5V tolerant

Asynchronous active low input pin used to power down the device into a

8

PD#*

PWR low power state. The internal clocks are disabled and the VCO and the

crystal are stopped. The latency of the power down will not be greater

than 1.8ms.

* Internal Pull-Up Resistor ** Internal Pull-Down Resistor

0698D—10/05/04

2

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