ICS85310AYI-21LN IDT, Integrated Device Technology Inc, ICS85310AYI-21LN Datasheet - Page 11

• Manufacturer Part Number: ICS85310AYI-21LN
• Description: IC FANOUT BUFFER 1-5 DUAL 32LQFP
• Manufacturer: IDT, Integrated Device Technology Inc
• Series: HiPerClockS™r
• Type: Fanout Buffer (Distribution)r

Specifications of ICS85310AYI-21LN

• Number Of Circuits: 2
• Ratio - Input:output: 1:5
• Differential - Input:output: Yes/Yes
• Input: HCSL, LVDS, LVHSTL, LVPECL, SSTL
• Output: ECL, LVPECL
• Frequency - Max: 700MHz
• Voltage - Supply: 2.375 V ~ 3.8 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-LQFP
• Frequency-max: 700MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 85310AYI-21LN

3. Calculations and Equations.
LVPECL output driver circuit and termination are shown in Figure 5.
T
voltage of V
Pd_H = [(V
[(2V - 0.9V)/50Ω] * 0.9V = 19.8mW
Pd_L = [(V
[(2V - 1.7V)/50Ω] * 1.7V = 10.2mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 30mW
85310AYI-21
o calculate worst case power dissipation into the load, use the following equations which assume a 50Ω load, and a termination
•
•
For logic high, V
(V
For logic low, V
(V
OL_MAX
OH_MAX
CCO_MAX
CCO_MAX
CCO
- 2V.
– (V
– (V
- V
- V
CCO_MAX
CCO_MAX
OH_MAX
OL_MAX
OUT
OUT
) = 1.7V
) = 0.9V
= V
- 2V))/R
- 2V))/R
= V
OL_MAX
OH_MAX
L
L
F
] * (V
= V
] * (V
IGURE
D
= V
CCO_MAX
IFFERENTIAL
CCO_MAX
CCO_MAX
CCO_MAX
5. LVPECL D
– 1.7V
- V
- V
– 0.9V
OL_MAX
OH_MAX
) = [(2V - (V
) = [(2V - (V
www.idt.com
-
TO
RIVER
V
Q1
CCO
-2.5V/3.3V ECL/LVPECL F
11
C
IRCUIT AND
CCO _MAX
CCO _MAX
- V
- V
T
OL_MAX
R L
ERMINATION
OH_MAX
V
50
CCO
V
- 2V
)) /R
)) /R
OUT
L
] * (V
L
] * (V
L
OW
CCO_MAX
CCO _MAX
ICS85310I-21
S
- V
KEW
- V
OL_MAX
OH_MAX
, D
ANOUT
) =
) =
REV. E AUGUST 13, 2010
UAL
, 1-
B
UFFER
TO
-5