ICS8535AGI-31LF IDT, Integrated Device Technology Inc, ICS8535AGI-31LF Datasheet - Page 8

• Manufacturer Part Number: ICS8535AGI-31LF
• Description: IC CLK FAN BUFF MUX 1:4 20TSSOP
• Manufacturer: IDT, Integrated Device Technology Inc
• Series: HiPerClockS™r
• Type: Fanout Buffer (Distribution), Multiplexerr

Specifications of ICS8535AGI-31LF

• Number Of Circuits: 1
• Ratio - Input:output: 2:4
• Differential - Input:output: No/Yes
• Input: LVCMOS, LVTTL, Crystal
• Output: LVPECL
• Frequency - Max: 266MHz
• Voltage - Supply: 3.135 V ~ 3.465 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP
• Frequency-max: 266MHz
• Number Of Clock Inputs: 2
• Mode Of Operation: Single-Ended
• Output Frequency: 266MHz
• Output Logic Level: LVPECL
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.465V
• Package Type: TSSOP
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Signal Type: LVCMOS/LVTTL
• Mounting: Surface Mount
• Pin Count: 20
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 800-1960-5; 8535AGI-31LF; ICS8535AGI-31LF

Application Information
Recommendations for Unused Input and Output Pins
Inputs:
Crystal Inputs
For applications not requiring the use of the crystal oscillator input,
both XTAL_IN and XTAL_OUT can be left floating. Though not
required, but for additional protection, a 1kΩ resistor can be tied from
XTAL_IN to ground.
CLK Input
For applications not requiring the use of a clock input, it can be left
floating. Though not required, but for additional protection, a 1kΩ
resistor can be tied from the CLK to ground.
LVCMOS Control Pins
All control pins have internal pull-ups or pull-downs; additional
resistance is not required but can be added for additional protection.
A 1kΩ resistor can be used.
Crystal Input Interface
The ICS8535I-31 has been characterized with 18pF parallel resonant
crystals. The capacitor values shown in Figure 2 below were
determined using an 18pF parallel resonant crystal and were chosen
to minimize the ppm error.
.
Figure 2. Crystal Input Interface
ICS8535I-31
ICS8535AGI-31 REVISION A JANUARY 27, 2010
18pF Parallel Crystal
X1
C1
18p
C2
22p
XTAL_IN
XTAL_OUT
LOW SKEW, 1-TO-4, CRYSTAL OSCILLATOR/LVCMOS-TO-3.3V LVPECL FANOUT BUFFER
8
Outputs:
LVPECL Outputs
All unused LVPECL outputs can be left floating. We recommend that
there is no trace attached. Both sides of the differential output pair
should either be left floating or terminated.
These same capacitor values will tune any 18pF parallel resonant
crystal over the frequency range and other parameters specified in
this data sheet. The optimum C1 and C2 values can be slightly
adjusted for different board layouts
©2010 Integrated Device Technology, Inc.