85214AGLF IDT, Integrated Device Technology Inc, 85214AGLF Datasheet - Page 7

• Manufacturer Part Number: 85214AGLF
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock Driverr

Specifications of 85214AGLF

• Number Of Clock Inputs: 2
• Output Frequency: 700MHz
• Output Logic Level: HSTL
• 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 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 20
• Lead Free Status / RoHS Status: Compliant

Parameter Measurement Information, continued
Output Rise/Fall Time
Application Information
Wiring the Differential Input to Accept Single Ended Levels
Figure 2 shows how the differential input can be wired to accept
single ended levels. The reference voltage V_REF = V
generated by the bias resistors R1, R2 and C1. This bias circuit
should be located as close as possible to the input pin. The ratio of
R1 and R2 might need to be adjusted to position the V_REF in the
center of the input voltage swing. For example, if the input clock
swing is only 2.5V and V
R2/R1 = 0.609.
IDT™ / ICS™ HSTL FANOUT BUFFER
Clock
Outputs
ICS85214
LOW SKEW, 1-TO-5, DIFFERENTIAL-TO-HSTL FANOUT BUFFER
20%
80%
t
R
DD
= 3.3V, V_REF should be 1.25V and
80%
t
F
20%
DD
V
/2 is
SW I N G
7
Figure 2. Single-Ended Signal Driving Differential Input
CLK_IN
0.1uF
C1
ICS85214AG REV. B FEBRUARY 25, 2008
R1
1K
V_REF
R2
1K
V
DD
CLKx
nCLKx