8525BGLF Integrated Device Technology (Idt), 8525BGLF Datasheet - Page 9

• Manufacturer Part Number: 8525BGLF
• Description: Clock Driver 2-IN LVHSTL 20-Pin TSSOP Tube
• Manufacturer: Integrated Device Technology (Idt)

Specifications of 8525BGLF

• Package: 20TSSOP
• Configuration: 1 x 2:1
• Input Signal Type: LVCMOS|LVTTL
• Maximum Output Frequency: 266 MHz
• Operating Supply Voltage: 3.3 V

ICS8525
L
S
, 1-
-4
OW
KEW
TO
LVCMOS-
-LVHSTL F
B
TO
ANOUT
UFFER
3. Calculations and Equations.
The purpose of this section is to derive the power dissipated into the load.
LVHSTL output driver circuit and termination are shown in Figure 2.
V
DDO
Q1
V
OUT
RL
50
F
2. LVHSTL D
C
T
IGURE
RIVER
IRCUIT AND
ERMINATION
To calculate worst case power dissipation into the load, use the following equations which assume a 50 load.
Pd_H is power dissipation when the output drives high.
Pd_L is the power dissipation when the output drives low.
Pd_H = (V
/R
) * (V
- V
)
OH_MIN
L
DDO_MAX
OH_MIN
Pd_L = (V
/R
) * (V
- V
)
OL_MAX
L
DDO_MAX
OL_MAX
Pd_H = (1V/50 ) * (2V - 1V) = 20mW
Pd_L = (0.4V/50 ) * (2V - 0.4V) = 12.8mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 32.8mW
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8525BG
REV. D AUGUST 1, 2010
9