PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS840001-31
F
EMTO
C
LOCKS
™ C
RYSTAL
-
TO
-
LVCMOS/LVTTL F
REQUENCY
S
YNTHESIZER
Type
Input
Input
Input
Pullup
Pullup
Description
Output enable pin. When HIGH, REF_CLK output is enabled.
When LOW, forces REF_CLK to HiZ state.
LVCMOS/LVTTL interface levels.
Cr ystal oscillator interface. XTAL_IN is the input.
XTAL_OUT is the output.
M divider input. 0 = ÷24, 1 = ÷15 (default).
LVCMOS/LVTTL interface levels.
No connect.
Core supply pin.
Power supply ground.
Output supply pin.
Single-ended clock output. LVCMOS/LVTTL interface levels.
20
Ω
typical output impedance.
Single-ended three-state reference clock output.
LVCMOS/LVTTL interface levels. 20
Ω
typical output impedance.
Analog supply pin.
T
ABLE
1. P
IN
D
ESCRIPTIONS
Number
1
2,3
4
5, 6, 7, 8,
14, 15
9
10
11
12
13
16
Name
OE
XTAL_IN,
XTAL_OUT
M
nc
V
DD
GND
V
DDO
Q
REF_CLK
V
DDA
Unused
Power
Power
Power
Output
Output
Power
NOTE:
Pullup
refers to internal input resistors. See Table 2, Pin Characteristics, for typical values.
T
ABLE
2. P
IN
C
HARACTERISTICS
Symbol
C
IN
C
PD
R
PULLUP
R
OUT
Parameter
Input Capacitance
Power Dissipation Capacitance
Input Pullup Resistor
Output Impedance
V
DD
, V
DDA,
V
DDO
= 3.465V
Test Conditions
Minimum
Typical
4
8
51
20
Maximum
Units
pF
pF
kΩ
Ω
840001-31AK
www.icst.com/products/hiperclocks.html
2
REV. A MAY 4, 2005
ICS [ INTEGRATED CIRCUIT SYSTEMS ]
