8538BG-31LFT IDT, Integrated Device Technology Inc, 8538BG-31LFT Datasheet - Page 3

• Manufacturer Part Number: 8538BG-31LFT
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock Driverr

Specifications of 8538BG-31LFT

• 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: 0C to 70C
• Operating Temperature Classification: Commercial
• Signal Type: LVCMOS/LVTTL
• Mounting: Surface Mount
• Pin Count: 28
• Lead Free Status / RoHS Status: Compliant

Function Tables
Table 3A. Control Input Function Table
After CLK_EN switches, the clock outputs are disabled or enabled following a rising and falling input clock or crystal oscillator edge as
shown in Figure 1. In the active mode, the state of the outputs are a function of the CLK input as described in Table 3B.
Figure 1. CLK_EN Timing Diagram
Table 3B. Clock Input Function Table
IDT™ / ICS™ LVPECL FANOUT BUFFER
nQ0:nQ7
CLK_EN
ICS8538-31
LOW SKEW, 1-TO-8, CRYSTAL OSCILLATOR/LVCMOS-TO-3.3V LVPECL FANOUT BUFFER
Q0:Q7
CLK_EN
Inputs
CLK
CLK
0
0
1
1
0
1
CLK_SEL
Q0:Q7
HIGH
LOW
0
1
0
1
Inputs
Outputs
Disabled
nQ0:nQ7
HIGH
XTAL_IN, XTAL_OUT
XTAL_IN, XTAL_OUT
LOW
Selected Source
CLK
CLK
3
Disabled; Low
Disabled; Low
Enabled
Enabled
Q0:Q7
Outputs
Enabled
Disabled; High
Disabled; High
nQ0:nQ7
Enabled
Enabled
ICS8538BG-31 REV. B FEBRUARY 5, 2008