ICS874002AGLF IDT, Integrated Device Technology Inc, ICS874002AGLF Datasheet - Page 10

• Manufacturer Part Number: ICS874002AGLF
• Description: IC JITTER ATTENUATOR 20-TSSOP
• Manufacturer: IDT, Integrated Device Technology Inc
• Series: HiPerClockS™r
• Type: Jitter Attenuatorr

Specifications of ICS874002AGLF

• Input: HCSL, LVDS, LVHSTL, LVPECL, SSTL
• Output: LVDS
• Frequency - Max: 160MHz
• Voltage - Supply: 3.135 V ~ 3.465 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP
• Frequency-max: 160MHz
• Number Of Elements: 1
• Supply Current: 80mA
• Pll Input Freq (min): 98MHz
• Pll Input Freq (max): 128MHz
• Operating Supply Voltage (typ): 3.3V
• Operating Temp Range: 0C to 70C
• Package Type: TSSOP
• Output Frequency Range: 98 to 160MHz
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (max): 3.465V
• Operating Temperature Classification: Commercial
• Pin Count: 20
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 800-1213; 800-1213-5; 800-1213; 874002AGLF

T
IDT
This section provides information on power dissipation and junction temperature for the ICS874002.
Equations and example calculations are also provided.
1. Power Dissipation.
The total power dissipation for the ICS874002 is the sum of the core power plus the power dissipated in the load(s).
The following is the power dissipation for V
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
moderate air flow of 200 linear feet per minute and a multi-layer board, the appropriate value is 66.6°C/W per Table 6 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).
ABLE
ICS874002
PCI EXPRESS/JITTER ATTENUATOR
™
The equation for Tj is as follows: Tj =
Tj = Junction Temperature
Pd_total = Total Device Power Dissipation (example calculation is in section 1 above)
T
70°C + 0.700W * 66.6°C/W = 116.6°C. This is below the limit of 125°C.
/ ICS
JA
A
Single-Layer PCB, JEDEC Standard Test Boards
Multi-Layer PCB, JEDEC Standard Test Boards
NOTE: Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs.
6. T
= Ambient Temperature
= Junction-to-Ambient Thermal Resistance
Power (core)
Power (outputs)
Total Power
™
PCI EXPRESS/JITTER ATTENUATOR
HERMAL
R
ESISTANCE
MAX
_MAX
= V
MAX
= 318.78mW + 381.15mW = 699.93mW
= V
DD_MAX
DDO_MAX
* (I
JA
FOR
DD_MAX
* I
DDO_MAX
20-L
+ I
JA
DD
DDA_MAX
JA
= 3.465V * 110mA = 381.15mW
= 3.3V + 5% = 3.465V, which gives worst case results.
P
EAD
by Velocity (Linear Feet per Minute)
* Pd_total + T
OWER
) = 3.465V * (80mA + 12mA) = 318.78mW
TSSOP, F
C
A
ORCED
ONSIDERATIONS
114.5°C/W
73.2°C/W
10
C
0
ONVECTION
TM
devices is 125°C.
98.0°C/W
66.6°C/W
200
ICS874002AG REV. A DECEMBER 6, 2006
JA
88.0°C/W
63.5°C/W
must be used. Assuming a
500