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TSB81BA3D датащи(PDF) 10 Page - Texas Instruments |
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TSB81BA3D датащи(HTML) 10 Page - Texas Instruments |
10 / 61 page TSB81BA3D, TSB81BA3DI IEEE 1394b THREE-PORT CABLE TRANSCEIVER/ARBITER SLLS559E − DECEMBER 2002 − REVISED JUNE 2006 10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Terminal Functions (Continued) TERMINAL I/O DESCRIPTION NAME TYPE NO. I/O DESCRIPTION TPA2− TPA2+ TPB2− TPB2+ Cable 58 59 55 56 I/O Port 2 twisted-pair differential-signal terminals. Board traces from each pair of positive and negative differential signal terminals must be kept matched and as short as possible to the external load resistors and to the cable connector. Please request the S800 1394b layout recommendations document from your TI representative. TPBIAS0 TPBIAS1 TPBIAS2 Cable 47 54 60 I/O Twisted-pair bias output. This provides the 1.86-V nominal bias voltage needed for proper operation of the twisted-pair cable drivers and receivers, and for signaling to the remote nodes that there is an active cable connection in 1394a−2000 mode. Each of these terminals, except for an unused port, must be decoupled with a 1.0- μF capacitor to ground. For the unused port, this terminal can be left unconnected. Please request the S800 1394b layout recommendations document from your TI representative. XI Osc In 27 − Oscillator input. This terminal connects to a 98.304-MHz low jitter external oscillator. The XI terminal is a 1.8-V CMOS input. Oscillator jitter must be 5 ps RMS or better. If only 3.3-V oscillators can be acquired, then great care must be taken to not introduce significant jitter by the means used to level shift from 3.3 V to 1.8 V. If a resistor divider is used, then a high current oscillator and low-value resistors must be used to minimize RC time constants. If a level-shifting circuit is used, then it must introduce very little jitter. Please see layout recommendations document. absolute maximum ratings over operating free-air temperature (unless otherwise noted)† Supply voltage range, VDD (see Note 1) −0.3 V to 4 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input voltage range, VI (see Note 1) −0.5 V to VDD + 0.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output voltage range at any output, VO −0.5 V to VDD + 0.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous total power dissipation See Dissipation Rating Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating free air temperature, TA: TSB81BA3D 0 °C to 70°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TSB81BA3DI −40 °C to 85°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Storage temperature range, Tstg −65 °C to 150°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260 °C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE 1: All voltage values, except differential I/O bus voltages, are with respect to network ground. DISSIPATION RATING TABLE PACKAGE TA ≤ 25°C POWER RATING DERATING FACTOR‡ ABOVE TA = 25°C TA = 70°C POWER RATING TA = 85°C POWER RATING PFP§# 5.05 W 52.5 mW/ °C 2.69 W 1.9 W PFP¶# 3.05 W 31.7 mW/ °C 1.62 W 1.15 W ‡ This is the inverse of the traditional junction-to-ambient thermal resistance (RθJA). § 2 oz. trace and copper pad with solder. ¶ 2 oz. trace and copper pad without solder. # For more information, refer to TI application note PowerPAD ™ Thermally Enhanced Package, (SLMA002). PowerPAD is a trademark of Texas Instruments. |
Аналогичный номер детали - TSB81BA3D_16 |
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Аналогичное описание - TSB81BA3D_16 |
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