DS31256 Maxim Integrated Products, DS31256 Datasheet - Page 178

• Manufacturer Part Number: DS31256
• Description: IC CTRLR HDLC 256-CHANNEL 256BGA
• Manufacturer: Maxim Integrated Products

Specifications of DS31256

• Controller Type: HDLC Controller
• Interface: Serial
• Voltage - Supply: 3 V ~ 3.6 V
• Current - Supply: 500mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 256-BGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

16.
Table 16-A. Thermal Properties, Natural Convection
Note 1: The package is mounted on a four-layer JEDEC standard test board with no airflow and dissipating maximum power.
Note 2: Theta-JA (θ
Table 16-B. Thermal Properties vs. Airflow
Figure 16-1. 27mm x 27mm PBGA with 256 Balls, 2oz Planes, +70°C
Ambient, Under Natural Convection at 3.0W
Ambient Temperature
Junction Temperature
Theta-JA (θ
Psi-JB (Ψ
Psi-JT (Ψ
FORCED AIR (m/s)
with no airflow and dissipating maximum power.
THERMAL CHARACTERISTICS
JT
2.5
JB
PARAMETER
0
1
), Still Air
), Still Air
JA
), Still Air
JA
) is the junction-to-ambient thermal resistance, when the package is mounted on a four-layer JEDEC standard test board
THETA-JA (θ
15.4°C/W
13.0°C/W
11.9°C/W
(Note 1)
(Note 2)
JA
CONDITIONS
)
178 of 183
Psi-JB (Ψ
7.03°C/W
6.77°C/W
6.53°C/W
JB
)
MIN
0
0
Psi-JT (Ψ
TYP
15.4
7.03
0.07
0.07°C/W
0.40°C/W
0.57°C/W
JT
+125°C
+70°C
MAX
)
UNITS
°C/W
°C/W
°C/W
°C
°C