85214AGLF IDT, Integrated Device Technology Inc, 85214AGLF Datasheet - Page 9

• 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

Recommendations for Unused Input and Output Pins
Inputs:
LVCMOS Control Pins
All control pins have internal pull-ups or pull-downs; additional
resistance is not required but can be added for additional
protection. A 1kΩ resistor can be used.
CLK/CLK I
For applications not requiring the use of the differential input, both
CLK and CLK can be left floating. Though not required, but for
additional protection, a 1kΩ resistor can be tied from CLK0 to
ground.
CLK I
For applications not requiring the use of a clock input, it can be left
floating. Though not required, but for additional protection, a 1kΩ
resistor can be tied from the CLK input to ground.
Schematic Example
Figure 4 shows a schematic example of the ICS85214. In this
example, the input is driven by an IDT HiPerClockS HSTL driver.
The decoupling capacitors should be physically located near the
Figure 4. ICS85214 HSTL Buffer Schematic Example
IDT™ / ICS™ HSTL FANOUT BUFFER
ICS85214
LOW SKEW, 1-TO-5, DIFFERENTIAL-TO-HSTL FANOUT BUFFER
1.8V
NPUT
LVHSTL Driver
NPUTS
Zo = 50 Ohm
Zo = 50 Ohm
R9
50
R10
50
R12
1K
C2
0.1u
R11
1K
3.3V
1.8V
C1
0.1u
11
12
13
14
15
16
17
18
19
20
U1
GND
CLK_SEL
nc
nCLK
CLK
SCLK
nc
VDD
nCLK_EN
VDDO
ICS85214
9
nQ4
nQ3
nQ2
nQ1
nQ0
Outputs:
HSTL Outputs
All unused HSTL outputs can be left floating. We recommend that
there is no trace attached. Both sides of the differential output pair
should either be left floating or terminated.
power pin. For ICS85214, the unused clock outputs can be left
floating.
Q4
Q3
Q2
Q1
Q0
10
9
8
7
6
5
4
3
2
1
Zo = 50
Zo = 50
Zo = 50
Zo = 50
Zo = 50
Zo = 50
ICS85214AG REV. B FEBRUARY 25, 2008
R2
50
R8
50
R4
50
R1
50
R7
50
R3
50
+
-
+
-
+
-