ICS85357AG-01 IDT, Integrated Device Technology Inc, ICS85357AG-01 Datasheet - Page 9

• Manufacturer Part Number: ICS85357AG-01
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock Multiplexerr

Specifications of ICS85357AG-01

• Number Of Clock Inputs: 4/2
• Mode Of Operation: Differential
• Output Frequency: 750MHz
• Output Logic Level: ECL/LVPECL
• Operating Supply Voltage (min): -3.135/3.135V
• Operating Supply Voltage (typ): -3.3/3.3V
• Operating Supply Voltage (max): -3.465/3.465V
• Package Type: TSSOP
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 20
• Lead Free Status / RoHS Status: Not Compliant

3. Calculations and Equations.
LVPECL output driver circuit and termination are shown in Figure 4.
T
voltage of V
Pd_H is power dissipation when the output drives high.
Pd_L is the power dissipation when the output drives low.
Pd_H = [(V
[(2V - 0.9V)/50 ] * 0.9V = 19.8mW
Pd_L = [(V
[(2V - 1.7V)/50 ] * 1.7V = 10.2mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 30mW
85357AG-01
o calculate worst case power dissipation into the load, use the following equations which assume a 50 load, and a termination
•
•
For logic high, V
(V
For logic low, V
(V
OL_MAX
OH_MAX
CC_MAX
CC_MAX
CC
- 2V.
– (V
– (V
- V
- V
OL_MAX
OH_MAX
CC_MAX
CC_MAX
OUT
OUT
) = 1.7V
) = 0.9V
- 2V))/R
- 2V))/R
= V
= V
OL_MAX
OH_MAX
L
L
F
] * (V
] * (V
IGURE
= V
= V
CC_MAX
CC_MAX
CC_MAX
D
CC_MAX
4. LVPECL D
IFFERENTIAL
- V
– 1.7V
- V
– 0.9V
OL_MAX
OH_MAX
) = [(2V - (V
) = [(2V - (V
www.idt.com
RIVER
V
-
Q1
CC
TO
9
-3.3V LVPECL / ECL C
C
CC_MAX
CC_MAX
IRCUIT AND
- V
- V
OL_MAX
OH_MAX
T
RL
V
50
ERMINATION
)) /R
CC
)) /R
- 2V
V
L
OUT
] * (V
L
] * (V
CC_MAX
CC_MAX
- V
- V
OL_MAX
OH_MAX
ICS85357-01
LOCK
) =
) =
M
4:1
ULTIPLEXER
REV. B JULY 29, 2010
OR
2:1