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UCC5619 Datasheet(PDF) 3 Page - Texas Instruments |
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UCC5619 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 4 page 3 UCC5619 PIN DESCRIPTIONS DISCNCT: Taking this pin low causes all channels to become high impedance, and the chip to go into low-power mode; a high state or leaving it open allows the channels to provide normal termination. GND: Ground reference for the IC. LINE1 - LINE27: 110 Ω termination channels. REG: Output of the internal 2.7V regulator; bypass with a 4.7 F capacitor to GND. TRMPWR: Power for the IC; bypass with a 4.7 F capacitor to GND. ELECTRICAL CHARACTERISTICS Unless otherwise stated, these specifications apply for TA = 0°C to 70°C, TRMPWR = 4.75V, DISCNCT = 4.75V, TA = TJ. PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Output Section (CONT.) VLINE = 0.5V 22.4 mA Output Leakage DISCNCT = 0V, TRMPWR = 0V to 5.25V 10 400 nA Output Capacitance DISCNCT = 0V (Note 2) 2.5 4 pF Regulator Section Regulator Output Voltage 2.6 2.8 3.0 V Drop Out Voltage All Termination Lines = 0.2V 0.4 0.8 V Short Circuit Current VREG = 0V −650 −900 –1300 mA Sinking Current Capability VREG = 3.5V 300 500 900 mA Thermal Shutdown 170 °C Thermal Shutdown Hysteresis 10 °C Disconnect Section Disconnect Threshold 0.8 1.5 2.0 V Input Current DISCNCT = 0V –20 –60 µA 11 29 25 TERMPWR DISCNCT DATA BYTES 1AND 2 +2 PARITY BITS 7 REG 4.7 µF 4.7 µF TO SCSI BUS TERMPWR 17 LINE1 LINE27 CONTROL BYTES TO DRIVERS AND RECEIVERS UCC5619 Figure 1. Typical wide SCSI bus configuration using the UCC5619 UDG-98072 UNITRODE CORPORATION 7 CONTINENTAL BLVD. • MERRIMACK, NH 03054 TEL. (603) 424-2410 FAX (603) 424-3460 |
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