HiPerClockS鈩?/div>
is a member of the HiPerClockS鈩?family of High
Performance Clock Solutions from ICS. The
ICS85357-11 has 4 selectable crystal
inputs. The device can support 10MHz - 25MHz parallel
resonant crystals by connecting external capacitors between
XTALIN/XTALOUT and ground. The select pins have
internal pulldown resistors and leaving one input
unconnected (pulled to logic low by the internal resistor) will
transform the device into a 2:1 multiplexer. The SEL1 lead is
the most significant line and the binary number applied to
the select pins will select the same numbered data input (i.e.,
00 selects XTALIN0/XTALOUT0).
,&6
B
LOCK
D
IAGRAM
P
IN
A
SSIGNMENT
V
CC
XTALIN0
XTALOUT0
XTALIN1
XTALOUT1
XTALIN2
XTALOUT2
XTALIN3
XTALOUT3
V
EE
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
SEL1
SEL0
V
CC
Q0
nQ0
V
CC
nc
nc
V
EE
XTALIN0
OSC
XTALOUT0
XTALIN1
OSC
XTALOUT1
XTALIN2
OSC
XTALOUT2
XTALIN3
OSC
XTALOUT3
SEL1 SEL0
11
10
01
Q0
nQ0
00
ICS85357-11
20-Lead TSSOP
4.40mm x 6.50mm x 0.92mm body package
G Package
Top View
85357AG-11
www.icst.com/products/hiperclocks.html
1
REV. A JULY 25, 2001