ICS8737AG-11LFT IDT, Integrated Device Technology Inc, ICS8737AG-11LFT Datasheet - Page 12

• Manufacturer Part Number: ICS8737AG-11LFT
• Description: IC CLOCK GEN LVPECL 20-TSSOP
• Manufacturer: IDT, Integrated Device Technology Inc
• Series: HiPerClockS™r
• Type: Fanout Buffer (Distribution), Divider, Multiplexerr

Specifications of ICS8737AG-11LFT

• Number Of Circuits: 1
• Ratio - Input:output: 2:2
• Differential - Input:output: Yes/Yes
• Input: CML, HCSL, LVDS, LVHSTL, LVPECL, SSTL
• Output: LVPECL
• Frequency - Max: 650MHz
• Voltage - Supply: 3.135 V ~ 3.465 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP
• Frequency-max: 650MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 8737AG-11LFT

3. Calculations and Equations.
LVPECL output driver circuit and termination are shown in Figure 6.
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
8737AG-11
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
CC_MAX
CC_MAX
- 2V.
– (V
– (V
- V
- V
OH_MAX
OL_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
CC_MAX
6. LVPECL D
- V
– 1.7V
- V
– 0.9V
OL_MAX
OH_MAX
D
) = [(2V - (V
) = [(2V - (V
IFFERENTIAL
www.idt.com
RIVER
V
Q1
CC
12
C
CC_MAX
CC_MAX
IRCUIT AND
-
- V
TO
- V
OL_MAX
OH_MAX
- 3.3V LVPECL C
T
RL
V
50
ERMINATION
)) /R
CC
)) /R
- 2V
V
L
] * (V
L
OUT
] * (V
CC_MAX
CC_MAX
- V
- V
OL_MAX
OH_MAX
L
ICS8737-11
OW
) =
LOCK
) =
S
KEW
REV. C AUGUST 9, 2010
G
ENERATOR
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