ICST AV9120M-09, AV9120M-08, ICS9120M-08, ICS9120M-09 Datasheet

Integrated Circuit Systems, Inc.

General Description

Features

ICS9120-08 ICS9120-09

XTAL OSC

14.318 MHz

X2(-08)

PD(-09)

REF (14.3MHz)

CLK3 (16.9MHz)

CLK2 (33.9MHz)

CLK1 (24.6MHz)

PLL

CLOCK

GEN

External

Crystal

Load Caps



÷2

Frequency Generator for Multimedia Audio Synthesis

9120-08 9120-09 Rev C 052297P

Block Diagram

The ICS9120-08 and ICS 9120-09 are high performance frequency generators designed to support stereo audio codec systems. It offers both clock frequencies required by stereo codecs such as the CS4231 and the AD1848 plus the clock needed for the OPL4 FM synthesizer. These frequencies can be synthesized from the existing 14.318 MHz system clock or from the on-chip oscillator using a 14.318 MHz crystal (-08 only).

High accuracy, low jitter PLLs meet the 0.125% frequency tolerance and -96dB signal-to-noise ratios required by 16 bit audio systems. Fast output clock edge rates minimize board induced jitter.

Unlike competitive devices, the ICS9120-08 and ICS9120-09 operate over the entire 3.0-5.5V range, with the

-09 providing power-down to minimize energy consumption.

• Generates 16.934 MHz and 24.576 MHz stereo codec

clocks plus the 33.868 MHz OPL4 clock

• Single 14.318MHz crystal or system clock reference

• Buffered REFCLK output

• 0.125% frequency accuracy meets OPL4 specifications

• 100 ps one sigma jitter maintains 16 bit performance

• Output rise/fall times less than 2.0 nS

• On chip loop filter components

• 3.3V - 5 V supply range

• 8 pin, 150mil SOIC package

Applications

• Specifically designed to support the high performance

requirements of multimedia audio systems.

ICS reserves the right to make changes in the device data identified in this publication without further notice. ICS advises its customers to obtain the latest version of all device data to verify that any information being relied upon by the customer is current and accurate.

ICS9120-08 ICS9120-09

Pin Configuration

Pin Descriptions for ICS9120-08

Functionality

PIN NUMBER PIN NAME TYPE DESCRIPTION 1 X1 Input Crystal or external clock source. Has feedback bias for crystal. 2V

Power Power supply input.

3 GND Power Ground return for Pin 2. 4 CLK3 Output 16.934 MHz target output clock for stereo codec.

5 CLK1 Output 24.576 MHz target output clock for stereo codec. 6 CLK2 Output 33.868 MHz target output clock for OPL4. 7 REF Output 14.318 MHz reference clock buffered output. 8 X2 Output Crystal output drive.

Pin Descriptions for ICS9120-09

PIN NUMBER PIN NAME TYPE DESCRIPTION 1 X1 Input External clock source. 2 VDD Power Power supply input. 3 GND Power Ground return for Pin 2. 4 CLK3 Output 16.934 MHz target output clock for stereo codec. 5 CLK1 Output 24.576 MHz target output clock for stereo codec. 6 CLK2 Output 33.868 MHz target output clock for OPL4. 7 REF Output 14.318 MHz reference clock buffered output. 8 PD# Input Power-down input powers down entire device when low; has pull-up.

Note: (Pin 8) is internally pulled-up to VDD and, therefore, may be left disconnected or driven by open collector logic.

8-Pin SOIC

X1, X2

(MHz)

(-09 only)

PD#

33.9

(MHz)

16.9

(MHz)

24.6

(MHz)

14.3

(MHz)

- 0 Low Low Low Low

14.318 1 33.868 16.934 24.576 14. 318

ICS9120-08 ICS9120-09

Absolute Maximum Ratings

Electrical Characteristics at 3.3 V

VDD = +3.0 to +3.7 V, TA = 0 to 70oC unless otherwise stated

Note 1: Parameter is guaranteed by design and characterization. Not 100% tested in production.

AVDD, VDD referenced to GND ...................................................................... 7 V

Operating temperature under bias................................................... 0C t o +70C

Storage temperature........................................................................ -65C to +150

Voltage on I/O pins referenced to GND ............... GND -0.5V to VDD +0.5V

Power dissipation ................................................................................... 0.5 Watts

Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect product reliability.

DC Characteristics

PAR AM ET ER SYM BO L TES T C OND IT I ON S MIN TYP MAX UNI TS

Input Low Voltage V

--0.2VDDV

Input High Voltage V

0.7V

--V

Input Low Current I

= 0 V (For -09 only) -8.0 -3.6 - µA

Input High Current I

VIN (For -09 only) --5.0µA

Output Low Voltage V

= 6 m A - 0 . 0 5V

0.1 V

Output High Voltage V

= -4.0 mA 0.85V

0.94V

-V

Out p ut Low C ur r e nt I

= 0.2V

15.0 24.0 - mA

Output High Curr ent I

= 0. 7V

--13.0-8.0mA

Supply Current I

Unload ed - 13.0 32.0 mA

Supply Current I

CC(PD)

Unloa d e d ( For -09 only) - 50.0 110. 0 µA

Pull-up Resistor Value R

*(For -09 only) - 620.0 900.0 k ohm

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