TSI148-133CL IDT, Integrated Device Technology Inc, TSI148-133CL Datasheet - Page 186

• Manufacturer Part Number: TSI148-133CL
• Description: IC PCI-VME BRIDGE 456PBGA
• Manufacturer: IDT, Integrated Device Technology Inc
• Series: Tsi148&Trade;r

Specifications of TSI148-133CL

• Applications: PCI-to-VME Bridge
• Interface: PCI
• Voltage - Supply: 3.3V
• Package / Case: 456-PBGA
• Mounting Type: Surface Mount
• Package Type: BGA
• Rad Hardened: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 800-1906

9. Electrical Characteristics > Thermal Characteristics
9.4
9.4.1
186
Table 30
determined by subtracting the Total Core Logic Power from the Total Power Dissipation.
Table 30: Tsi148 Power Dissipation Division
Thermal Characteristics
Based on the worst case die power dissipation of 1.84W the Tsi148’s thermal performance
does meet the industrial grade requirements. These results are based on the Tsi148 being
routed on an 8 layer PCB. It should be noted that the thermal simulations for a JEDEC
standard 4 layer PCB with a worst case power dissipation of 1.84W, the Tsi148 does not have
sufficient thermal performance to meet the industrial grade requirements. If the worst case die
power dissipation is less than or equal to 1.7W, the Tsi148 does have sufficient thermal
performance to meet the industrial grade requirements when routed on a 4 layer PCB.
The maximum ambient temperature of the Tsi148 can be calculated as follows:
Ta <= Tj - Theta ja * P
Where,
Ta = Ambient temperature ( °C )
Tj = Maximum Tsi148 Junction temperature (°C) = 122°C
Theta ja = Ambient to Junction Thermal Impedance ( °C /Watt)
P = Tsi148 power consumption (Watts)
Junction-to-Ambient Thermal Characteristics (Theta ja)
The junction-to-ambient thermal impedance (Theta ja) is dependent on the air flow in
meters per second over the Tsi148.
Total Core Logic Power
shows how the power dissipation is divided in the Tsi148. The IO portion can be
PLL Power
Source
(“Power Consumption” on page
Nominal (W)
1.322
0.030
Tsi148 PCI/X-to-VME Bus Bridge User Manual
185).
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