Preliminary

PLL501-22

27MHz Multiple Output VCXO with Audio Clock

47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991

Rev 02/26/04 Page 1

FEATURES

• 2 VCXO outputs at 27MHz (27MHz crystal input).

• Selectable Audio Clocks supporting:

32kHz, 44.1kHz, 48kHz, 64kHz and 96kHz

sampling rates

256, 384 and 512 oversampling ratios

8.192, 11.2896, 12.288, 16.9344, 16.384,

18.432, 22.5792, 24.576MHz audio frequencies

• +/- 120ppm pull range

• Power down tri-state selector.

• 3.3V Operating Voltage.

• No external load capacitor or varicap required.

• Available in 16-Pin SSOP.

DESCRIPTION

The PLL501-22 is a low cost integrated VCXO IC with

power down feature, designed to work with a

fundamental 27MHz crystal in order to provide most

common audio clocks (8.192, 11.2896, 12.288,

16.9344, 16.384, 18.432, 22.5792, and 24.576MHz)

required by sampling rates of 32kHz, 44.1kHz, 48kHz,

64kHz and 96kHz (256, 384 and 512 oversampling

ratios). The audio clock follows the pulled 27MHz

signal of the VCXO. The wide pull-range makes it

ideal for STB and MPEG Video applications.

PACKAGE PIN CONFIGURATION

Note: ^: Internal pull-up resistor. The internal pull-up resistor

results in a default high value when no pull-down resistor is

connected to this pin.

AUDIO CLOCK SELECTION

S2

S1

S0

ACLK (MHz)

0

0

0

8.192

0

0

1

11.2896

0

1

0

12.288

0

1

1

16.9344

1

0

0

18.432

1

0

1

16.384

1

1

0

22.5792

1

1

1

24.576

BLOCK DIAGRAM

1

2

3

4

5

6

7

8

XIN

9

10

11

12

13

14

15

16

XOUT

VDD

VDD

VIN

GND

GND

PDOWN^

S1^

27MHz

VDD

S0^

27MHz

GND

ACLK

S2^

XIN = 27 MHz

Xout

PDOWN

27MHz

Xin

[S2-S0]

Audio

PLL

VCXO

Vin

ACLK

27MHz