PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS83904-02
L
OW
S
KEW
, 1-
TO
-4
C
RYSTAL
-
TO
-LVCMOS/LVTTL F
ANOUT
B
UFFER
Type
Input
Input
Power
Input
Input
Input
Power
Output
Power
Description
Clock select inputs. See Table 3, Input Reference Function Table.
Pulldown
LVCMOS / LVTTL interface levels.
Cr ystal oscillator interface. XTAL_IN0 is the input.
XTAL_OUT0 is the output.
Core supply pin.
Cr ystal oscillator interface. XTAL_IN1 is the input.
XTAL_OUT1 is the output.
Pulldown Single-ended clock input. LVCMOS/LVTTL interface levels.
Output enable. When LOW, outputs are in HIGH impedance state.
Pullup
When HIGH, outputs are active. LVCMOS / LVTTL interface levels.
Output supply pins.
Single-ended clock outputs. LVCMOS/LVTTL interface levels.
Power supply ground.
T
ABLE
1. P
IN
D
ESCRIPTIONS
Number
1, 7
2, 3
4
5, 6
8
9
10, 16
11, 12, 14, 15
13
Name
CLK_SEL0,
CLK_SEL1
XTAL_OUT0,
XTAL_IN0
V
DD
XTAL_IN1,
XTAL_OUT1
CLK
OE
V
DDO
Q3, Q2, Q1, Q0
GN D
NOTE:
Pullup
and
Pulldown
refer to internal input resistors. See Table 2, Pin Characteristics, for typical values.
T
ABLE
2. P
IN
C
HARACTERISTICS
Symbol
C
IN
R
PULLUP
R
PULLDOWN
C
PD
Parameter
Input Capacitance
Input Pullup Resistor
Input Pulldown Resistor
Power Dissipation Capacitance
(per output)
V
DDO
= 3.465V
V
DDO
= 2.625V
V
DDO
= 2.0V
V
DDO
= 3.3V ± 5%
R
OUT
Output Impedance
V
DDO
= 2.5V ± 5%
V
DDO
= 1.8V ± 0.2V
Test Conditions
Minimum
Typical
4
51
51
8
7
7
19
TBD
TBD
Maximum
Units
pF
kΩ
kΩ
pF
pF
pF
Ω
Ω
Ω
T
ABLE
3. I
NPUT
R
EFERENCE
F
UNCTION
T
ABLE
Control Inputs
CLK_SEL1
CLK_SEL0
0
0
0
1
1
1
0
1
Reference
XTAL0 (default)
XTAL1
CLK
CLK
83904AG-02
www.icst.com/products/hiperclocks.html
2
REV. A JULY 8, 2005
ICS [ INTEGRATED CIRCUIT SYSTEMS ]
