TL2218-285_14 Datasheet, PDF (4/13 Pages) Texas Instruments – EXCALIBUR CURRENT-MODE SCSI TERMINATOR

TL2218Ć285, TL2218Ć285Y
EXCALIBUR CURRENTĆMODE SCSI TERMINATOR
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SLVS072C − DECEMBER 1992 − REVISED OCTOBER 1995
2400
FREE-AIR TEMPERATURE
DISSIPATION DERATING CURVE
2200
2000
1800
1600
1400
1200
1000
800
600
400
200
0
25
R_θJA = 151°C/W
50
75
100
125
150
TA − Free-Air Temperature − °C
4800
4400
4000
3600
3200
2800
2400
2000
1600
1200
800
400
0
25
Figure 1
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CASE TEMPERATURE
DISSIPATION DERATING CURVE
R_θJC = 31°C/W
50
75
100
125
150
TC − Case Temperature − °C
Figure 2
4800
LEAD TEMPERATURE
DISSIPATION DERATING CURVE
4400
4000
3600
3200
2800
2400
2000
1600
1200
800
400
† _{RθJL = 50.5°C/W}
0
25
50
75
100
125
150
TL − Lead Temperature − °C
Figure 3
† _{RθJL is the thermal resistance between the junction and device lead. To determine the virtual junction temperature (TJ) relative to the device lead}
temperature, the following calculations should be used: TJ = PD x R_θJL + TL, where PD is the internal power dissipation of the device, and TL is
the device lead temperature at the point of contact to the printed wiring board. R_θJL is 50.5°C/W.
8−4
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