ABMX0127 Datasheet, PDF (1/4 Pages) Abracon Corporation – 27MHz XO IC with Audio Clock (for Set Top Boxes & MPEG Video)

Preliminary ABMX0127
27MHz XO IC with Audio Clock (for Set Top Boxes & MPEG Video)
FEATURES
• 27MHz reference output (from 27MHz crystal
input or clock input).
• Selectable Audio Clocks supporting:
ƒ F_s of 32kHz, 44.1kHz, 48kHz, 64kHz and 96kHz
ƒ 8.192MHz, 11.2896MHz, 12.288MHz, and
24.576MHz audio frequencies
• On-the-fly switching of the audio frequency.
• 3.3V Operating Voltage.
• Available in 8-Pin SOIC.
DESCRIPTION
The ABMX0127 is a low cost integrated XO IC
designed to work with a fundamental 27MHz crystal
or a clock input. In addition to a 27MHz clock
reference, it provides the most common audio clocks
(8.192, 11.2896, 12.288, and 24.576MHz) required by
sampling rates of 32kHz, 44.1kHz, 48kHz, 64kHz and
96kHz, making the chip ideal for STB and MPEG
Video applications.
PACKAGE PIN CONFIGURATION
XIN/FIN 1
VDD 2
GND 3
27MHz 4
8 XOUT
7 S0^
6 S1^
5 ACLK
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
S1
S0
ACLK (MHz)
0
0
8.192
0
1
11.2896
1
0
12.288
1
1
24.576
BLOCK DIAGRAM
[S1-S0]
Audio
PLL
ACLK
Xin
XO
Xout
27MHz
30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: [phone] www.Abracon.com 03/21/05 Page 1