ICS83904-02 Datasheet, PDF (2/15 Pages) Integrated Circuit Systems – LOW SKEW, 1-TO-4 CRYSTAL-TO-LVCMOS/LVTTL FANOUT BUFFER

ICS83904-02
LOW SKEW, 1-TO-4, CRYSTAL-TO-LVCMOS/LVTTL FANOUT BUFFER
TABLE 1. PIN DESCRIPTIONS
Number
1, 7
2, 3
4
5, 6
8
9
10, 16
11, 12, 14, 15
Name
CLK_SEL0,
CLK_SEL1
XTAL_OUT0,
XTAL_IN0
V_DD
XTAL_IN1,
XTAL_OUT1
CLK
OE
V_DDO
Q3, Q2, Q1, Q0
Type
Description
Input
Input
Pulldown
Clock select inputs. See Table 3, Input Reference Function Table.
LVCMOS / LVTTL interface levels.
Crystal oscillator interface. XTAL_IN0 is the input.
XTAL_OUT0 is the output.
Power
Positive supply pin.
Input
Crystal oscillator interface. XTAL_IN1 is the input.
XTAL_OUT1 is the output.
Input Pulldown Single-ended clock input. LVCMOS/LVTTL interface levels.
Input
Pullup
Output enable. When LOW, outputs are in HIGH impedance state.
When HIGH, outputs are active. LVCMOS / LVTTL interface levels.
Power
Output supply pins.
Output
Single-ended clock outputs. LVCMOS/LVTTL interface levels.
13
GND
Power
Power supply ground.
NOTE: Pullup and Pulldown refer to internal input resistors. See Table 2, Pin Characteristics, for typical values.
TABLE 2. PIN CHARACTERISTICS
Symbol
C_IN
R_PULLUP
R_PULLDOWN
Parameter
Input Capacitance
Input Pullup Resistor
Input Pulldown Resistor
C_PD
Power Dissipation Capacitance
(per output)
R_OUT
Output Impedance
Test Conditions
V_DDO = 3.465V
V_DDO = 2.625V
V_DDO = 2.0V
V_DDO = 3.3V
V_DDO = 2.5V
V_DDO = 1.8V
Minimum
Typical
4
51
51
8
7
7
19
21
32
Maximum
Units
pF
kΩ
kΩ
pF
pF
pF
Ω
Ω
Ω
TABLE 3. INPUT REFERENCE FUNCTION TABLE
Control Inputs
CLK_SEL1 CLK_SEL0
0
0
0
1
1
0
1
1
Reference
XTAL0 (default)
XTAL1
CLK
CLK
IDT^™ / ICS^™ LVCMOS/LVTTL FANOUT BUFFER
2
ICS83904AG-02 REV. A SEPTEMBER 12, 2007