ICS87321AMILF IDT, Integrated Device Technology Inc, ICS87321AMILF Datasheet - Page 11

• Manufacturer Part Number: ICS87321AMILF
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock Dividerr

Specifications of ICS87321AMILF

• Number Of Clock Inputs: 1
• Mode Of Operation: Differential
• Output Logic Level: LVPECL
• Operating Supply Voltage (min): 2.375V
• Operating Supply Voltage (typ): 2.5/3.3V
• Operating Supply Voltage (max): 3.465V
• Package Type: SOIC N
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 8
• Lead Free Status / Rohs Status: Compliant

T
Figure 4A and Figure 4B show examples of termination for 2.5V
LVPECL driver. These terminations are equivalent to terminating
50 to V
IDT
F
ERMINATION FOR
ICS87321I
÷1, ÷2 DIFFERENTIAL-TO-3.3V LVPECL CLOCK GENERATOR
IGURE
VCCO=2.5V
VCCO=2.5V
™
F
/ ICS
IGURE
2,5V LVPECL
Driv er
2,5V LVPECL
Driv er
CC
4A. 2.5V LVPECL D
™
- 2V. For V
3.3V LVPECL CLOCK GENERATOR
4C. 2.5V LVPECL T
Zo = 50 Ohm
Zo = 50 Ohm
Zo = 50 Ohm
Zo = 50 Ohm
2.5V LVPECL O
CC
= 2.5V, the V
RIVER
2.5V
R1
250
ERMINATION
CC
R1
50
R2
62.5
- 2V is very close to ground
T
ERMINATION
R3
250
UTPUTS
R2
50
R4
62.5
E
XAMPLE
+
-
+
-
E
2.5V
2.5V
XAMPLE
11
level. The R3 in Figure 4B can be eliminated and the termination
is shown in Figure 4C.
F
IGURE
VCCO=2.5V
2,5V LVPECL
Driv er
4B. 2.5V LVPECL D
Zo = 50 Ohm
Zo = 50 Ohm
ICS87321AMI REV. A APRIL 7, 2009
RIVER
R1
50
T
ERMINATION
R2
50
R3
18
+
-
E
2.5V
XAMPLE