ICS85352AYI IDT, Integrated Device Technology Inc, ICS85352AYI Datasheet - Page 11

• Manufacturer Part Number: ICS85352AYI
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock Multiplexerr

Specifications of ICS85352AYI

• Number Of Clock Inputs: 2
• Mode Of Operation: Differential
• Output Frequency: 700MHz
• Output Logic Level: LVPECL
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.465V
• Package Type: TQFP EP
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 48
• Lead Free Status / Rohs Status: Not Compliant

Termination for 2.5V LVPECL Outputs
Figure 5A and Figure 5B show examples of termination for 2.5V
LVPECL driver. These terminations are equivalent to terminating 50Ω
to V
Figure 5A. 2.5V LVPECL Driver Termination Example
Figure 5C. 2.5V LVPECL Driver Termination Example
ICS85352I Data Sheet
ICS85352AYI REVISION B JULY 6, 2010
CC
V
V
CC
CC
– 2V. For V
2.5V LVPECL Driver
2.5V LVPECL Driver
= 2.5V
= 2.5V
CCO
= 2.5V, the V
50Ω
50Ω
50Ω
50Ω
CCO
R1
250Ω
2.5V
R2
62.5Ω
R1
50Ω
– 2V is very close to ground
R3
250Ω
R4
62.5Ω
R2
50Ω
+
+
–
–
2.5V
2.5V
11
level. The R3 in Figure 5B can be eliminated and the termination is
shown in Figure 5C.
Figure 5B. 2.5V LVPECL Driver Termination Example
V
CC
2.5V LVPECL Driver
= 2.5V
12 BIT, 2-TO-1, 3.3V, 2.5V LVPECL CLOCK BUFFER
50Ω
50Ω
©2010 Integrated Device Technology, Inc.
R1
50Ω
R2
50Ω
R3
18Ω
+
–
2.5V