ics8624 Integrated Device Technology, ics8624 Datasheet - Page 12

• Manufacturer Part Number: ics8624
• Description: Differential-input Hstl-output 1 5 700-mhz Clock Zero-delay Buffer
• Manufacturer: Integrated Device Technology

3. Calculations and Equations.
The purpose of this section is to derive the power dissipated into the load.
HSTL output driver circuit and termination are shown in Figure 5.
T
Pd_H is power dissipation when the output drives high.
Pd_L is the power dissipation when the output drives low.
Pd_H = (V
Pd_L = (V
Pd_H = (1V/50Ω) * (2V - 1V) = 20mW
Pd_L = (0.4V/50Ω) * (2V - 0.4V) = 12.8mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 32.8mW
8624BY
o calculate worst case power dissipation into the load, use the following equations which assume a 50Ω load.
OL_MAX
OH_MIN
/R
/R
Integrated
Circuit
Systems, Inc.
L
L
) * (V
) * (V
DD_MAX
DD_MAX
- V
- V
OL_MAX
OH_MIN
F
)
)
IGURE
www.icst.com/products/hiperclocks.html
5. HSTL D
RIVER
V
Q1
DDO
12
C
D
IRCUIT AND
IFFERENTIAL
T
ERMINATION
RL
50Ω
-
TO
V
OUT
-HSTL Z
ERO
L
OW
D
S
ICS8624
ELAY
KEW
REV. C JUNE 15, 2004
, 1-
B
UFFER
TO
-5