85310AYI-11LF Integrated Device Technology (Idt), 85310AYI-11LF Datasheet - Page 11

• Manufacturer Part Number: 85310AYI-11LF
• Description: Clock Driver 2-IN ECL/LVPECL 32-Pin LQFP Tray
• Manufacturer: Integrated Device Technology (Idt)

Specifications of 85310AYI-11LF

• Package: 32LQFP
• Configuration: 1 x 2:1
• Input Signal Type: HCSL|LVDS|LVHSTL|LVPECL|SSTL
• Maximum Output Frequency: 700 MHz
• Operating Supply Voltage: -2.5|-3.3|3.3 V

ICS85310I-11 Data Sheet
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
ICS85310AYI-11 REVISION F JUNE 9, 2010
CC
V
V
CC
CC
– 2V. For V
2.5V LVPECL Driver
2.5V LVPECL Driver
= 2.5V
= 2.5V
CC
= 2.5V, the V
50Ω
50Ω
50Ω
50Ω
CC
R1
250Ω
– 2V is very close to ground
2.5V
R2
62.5Ω
R1
50Ω
R3
250Ω
R4
62.5Ω
R2
50Ω
+
+
–
–
2.5V
2.5V
LOW SKEW, 1-TO-10 DIFFERENTIAL-TO-3.3V, 2.5V LVPECL/ECL FANOUT BUFFER
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
50Ω
50Ω
©2010 Integrated Device Technology, Inc.
R1
50Ω
R2
50Ω
R3
18Ω
+
–
2.5V