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ICS83908I-02

1-TO-8 CRYSTAL-TO-LVCMOS FANOUT BUFFER


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PRELIMINARY
LOW SKEW, 1-TO-8 CRYSTAL-TO-LVCMOS
FANOUT BUFFER
ICS83908I-02
GENERAL DESCRIPTION
The ICS83908I-02 is a low skew, high performance
ICS 1-to-8 Crystal Oscillator/3.3V LVCMOS-to-3.3V
HiPerClockS™ LVCMOS fanout buffer and a member of the
HiPerClockS™ family of High Performance Clock
Solutions from IDT. The ICS83908I-02 has selectable
single ended clock or two crystal-oscillator inputs. There is an
output enable to disable the outputs by placing them into a high-
impedance state.
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Guaranteed output and part-to-part skew characteristics make
the ICS83908I-02 ideal for those applications demanding well
defined performance and repeatability.
FEATURES
Eight LVCMOS/LVTTL outputs
(19Ω typical output impedance)
Two Crystal oscillator input pairs
One LVCMOS/LVTTL clock input
Crystal input frequencry range: 10MHz - 40MHz
Output frequency: 200MHz (typical) CLK0
Output Skew: TBD
Part to Part Skew: TBD
• RMS phase jitter @ 25MHz (100Hz - 1MHz):
0.22ps (typical) VDD = VDDO = 3.3V
Offset
Noise Power
100Hz ............. -111.4 dBc/Hz
1kHz ............. -139.9 dBc/Hz
10kHz ............. -157.3 dBc/Hz
100kHz ............. -157.5 dBc/Hz
Supply Voltage Modes:
(Core/Output)
3.3V/3.3V
3.3V/2.5V
3.3V/1.8V
2.5V/2.5V
2.5V/1.8V
BLOCK DIAGRAM
OE Pullup
-40°C to 85°C ambient operating temperature
Available in both standard (RoHS 5) and lead-free (RoHS 6)
packages
CLK_SEL0 Pulldown
CLK_SEL1 Pulldown
XTAL_IN0
XTAL_OUT0
OSC
00
PIN ASSIGNMENT
Q0
VDD
XTAL_IN0
XTAL_OUT0
VDDO
Q0
Q1
GND
Q2
Q3
VDDO
CLK_SEL0
CLK0
1
2
3
4
5
6
7
8
9
10
11
12
24 GND
23 XTAL_IN1
22 XTAL_OUT1
21 VDDO
20 Q7
19 Q6
18 GND
17 Q5
16 Q4
15 VDDO
14 CLK_SEL1
13 OE
XTAL_IN1
XTAL_OUT1
OSC
CLK0 Pulldown
01
10
11
8 LVCMOS Outputs
Q7
ICS83908I-02
24-Lead, 173-MIL TSSOP
4.4mm x 7.8mm x 0.92mm
body package
G Package
Top View
The Preliminary Information presented herein represents a product in pre-production. The noted characteristics are based on initial product characterization
and/or qualification. Integrated Device Technology, Incorporated (IDT) reserves the right to change any circuitry or specifications without notice.
IDT/ ICSLVCMOS FANOUT BUFFER
1 ICS83908AGI-02 REV. B JULY 24, 2007



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ICS83908I-02
LOW SKEW, 1-TO-8 CRYSTAL-TO-LVCMOS FANOUT BUFFER
PRELIMINARY
TABLE 1. PIN DESCRIPTIONS
Number
Name
Type
Description
1 VDD Power
2, 3
XTAL_IN0,
XTAL_OUT0
Input
Core supply pin.
Crystal oscillator interface. XTAL_IN0 is the input.
XTAL_OUT0 is the output.
4, 10, 15, 21
5, 6, 8,
9, 16, 17,
19, 20
VDDO
Q0, Q1, Q2,
Q3, Q4, Q5,
Q6, Q7
Power
Output
Output supply pins.
Single-ended clock outputs. LVCMOS/LVTTL interface levels.
7, 18, 24
GND
Power
Power supply ground.
11,
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CLK_SEL0,
CLK_SEL1
Input
Pulldown
Clock select inputs. See Table 3, Input Reference Function Table.
LVCMOS / LVTTL interface levels.
12
CLK0
Input Pulldown Single-ended clock input. LVCMOS/LVTTL interface levels.
13
22, 23
OE
XTAL_OUT1,
XTAL_IN1
Input
Input
Pullup
Output enable. When LOW, outputs are in HIGH impedance state.
When HIGH, outputs are active. LVCMOS / LVTTL interface levels.
Crystal oscillator interface. XTAL_IN1 is the input.
XTAL_OUT1 is the output.
NOTE: Pullup and Pulldown refer to internal input resistors. See Table 2, Pin Characteristics, for typical values.
TABLE 2. PIN CHARACTERISTICS
Symbol
CIN
RPULLUP
RPULLDOWN
Parameter
Input Capacitance
Input Pullup Resistor
Input Pulldown Resistor
CPD
Power Dissipation Capacitance
(per output)
ROUT
Output Impedance
Test Conditions
VDDO = 3.465V
VDDO = 2.625V
V = 2V
DDO
VDDO = 3.3V ± 5%
VDDO = 2.5V ± 5%
VDDO = 1.8V ± 0.2V
Minimum
Typical
4
51
51
7
7
6
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
00
01
10
11
Reference
XTAL0 (default)
XTAL1
CLK0
CLK0
IDT/ ICSLVCMOS FANOUT BUFFER
2 ICS83908AGI-02 REV. B JULY 24, 2007



Part Number ICS83908I-02
Description 1-TO-8 CRYSTAL-TO-LVCMOS FANOUT BUFFER
Maker Integrated Device Technology - Integrated Device Technology
Total Page 16 Pages
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