ICS9DB202CK-01LFT IDT, Integrated Device Technology Inc, ICS9DB202CK-01LFT Datasheet - Page 11

• Manufacturer Part Number: ICS9DB202CK-01LFT
• Description: IC JITTER ATTENUATOR 32-VFQFPN
• Manufacturer: IDT, Integrated Device Technology Inc
• Series: HiPerClockS™r
• Type: Jitter Attenuatorr

Specifications of ICS9DB202CK-01LFT

• Input: HCSL, LVDS, LVHSTL, LVPECL, SSTL
• Output: HCSL
• Frequency - Max: 140MHz
• Voltage - Supply: 3.135 V ~ 3.465 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 32-VFQFN
• Frequency-max: 140MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 9DB202CK-01LFT

This section provides information on power dissipation and junction temperature for the ICS9DB202-01.
Equations and example calculations are also provided.
1. Power Dissipation.
The total power dissipation for the ICS9DB202-01 is the sum of the core power plus the power dissipated in the load(s).
The following is the power dissipation for V
NOTE: Please refer to Section 3 for details on calculating power dissipated in the load.
2. Junction Temperature.
Junction temperature, Tj, is the temperature at the junction of the bond wire and bond pad and directly affects the reliability of the
device. The maximum recommended junction temperature for HiPerClockS
In order to calculate junction temperature, the appropriate junction-to-ambient thermal resistance θ
flow and a multi-layer board, the appropriate value is 34.8°C/W per Table 5 below.
Therefore, Tj for an ambient temperature of 70°C with all outputs switching is:
This calculation is only an example. Tj will obviously vary depending on the number of loaded outputs, supply voltage, air flow,
and the type of board (single layer or multi-layer).
T
IDT
ABLE
ICS9DB202-01
PCI EXPRESS JITTER ATTENUATOR
™
•
•
/ ICS
5. T
Power (core)
Power (outputs)
Total Power
The equation for Tj is as follows: Tj = θ
Tj = Junction Temperature
θ
Pd_total = Total Device Power Dissipation (example calculation is in Section 1 above)
T
70°C + 0.509W * 34.8°C/W = 87.7°C. This is well below the limit of 125°C.
™
JA
A
PCI EXPRESS JITTER ATTENUATOR
Multi-Layer PCB, JEDEC Standard Test Boards
= Ambient Temperature
HERMAL
= Junction-to-Ambient Thermal Resistance
R
_MAX
MAX
ESISTANCE
= V
MAX
(3.465V, with all outputs switching) = 464.3mW + 44.5mW = 508.81mW
= 44.5mW/Loaded Output pair
DD_MAX
θ θ θ θ θ
* (I
JA
FOR
DD_MAX
32-P
+ I
θ θ θ θ θ
JA
DD
DDA_MAX
= 3.3V + 5% = 3.465V, which gives worst case results.
P
0 Air Flow (Linear Feet per Minute)
IN
VFQFN, F
OWER
JA
)= 3.465V * (112mA + 22mA) = 464.3mW
* Pd_total + T
ORCED
C
ONSIDERATIONS
A
11
C
ONVECTION
34.8C/W
0
TM
devices is 125°C.
ICS9DB202CK-01 REV. B FEBRUARY 18, 2009
JA
must be used. Assuming no air