REG5601 BURR-BROWN | Alldatasheet

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Technical content

International Airport Industrial Park • Mailing Address: PO Box 11400 • Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd. • Tucson, AZ 85706 Tel: (520) 746-1111 • Twx: 910-952-1111 • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132 REG5601 18-LINE SCSI ACTIVE TERMINATOR

FEATURES

l COMPLIES WITH SCSI-2 SPECIFICATIONS l INTERNAL 2.9V REGULATOR l ON-CHIP TERMINATION RESISTORS l DISCONNECT ALL TERMINATION RESISTORS WITH A SINGLE LOGIC COMMAND l POWER-DOWN MODE: 150 µA max l LINE CAPACITANCE: 10pF typ l CURRENT LIMIT AND THERMAL SHUT- DOWN PROTECTION l 28-Lead SOIC and SSOP PACKAGES

DESCRIPTION

The REG5601 is an 18-line active terminator for SCSI-2 (Small Computer Systems Interface) circuitry. On-chip resistors and 2.9V regulator provide the pre- scribed 110Ω termination for low power dissipation and high speed data transmission. All line connections can be disconnected from the bus with a single logic control line to reduce standby power consumption. Output lines remain high imped- ance without power applied. Each line is individually clamped at ground to dissipate negative-going glitches. The 2.9V regulator is current-limited and thermally protected. Regulated output is available for external circuitry. The REG5601 is available in 28-lead SOIC and fine- pitch SSOP packages and is specified for operation over the 0°C to 70°C temperature range. Switch Drive 2.9V 110Ω 110Ω Thermal Shutdown Current Limit Switch Clamp Termpwr 2.9V Reg Out Signal Line 1 Signal Line 2 (18 Lines) Termpwr Ground Disconnect REG5601 REG5601 © 1994 Burr-Brown Corporation PDS-1216B Printed in U.S.A. August, 1995

CONNECTION DIAGRAM ABSOLUTE MAXIMUM RATINGS Top View SOIC SSOP REG5601U REG5601E PARAMETERS CONDITIONS MIN TYP MAX MIN TYP MAX UNIT POWER SUPPLY Termpwr Supply Voltage 4.0 5.25 4.0 5.25 V Termpwr Supply Current All Termination Lines = Open 14 25 14 25 mA All V TERM = 0.5V 385 430 385 430 mA Power-Down Mode Disconnect = Open (High) 100 150 100 150 µA TERMINATION LINES Termination Impedance ΔITERM = 5mA to 15mA 107 110 115 107 110 115.5 Ω Output High Voltage Termpwr = 4V (1) 2.65 2.8 2.65 2.8 V Termpwr = 4V, VTERM = 0.5V(1) 19.4 21 22.4 19 21 22.4 mA Output Leakage Disconnect = Open (High), Tempwr = 0V to 5.25V 20 400 20 400 nA Output Capacitance Disconnect = Open (High) 10 10 pF REGULATOR Line Regulation Termpwr = 4V to 6V 6 20 6 20 mV Load Regulation I REG = 0 to 400mA 20 50 20 50 mV Short-Circuit Current V REG = 0V 450 1350 1650 450 1350 1650 mA Current Sink V REG = 3.5V 8 11 8 11 mA Thermal Shutdown 170 170 °C DISCONNECT LOGIC INPUT Threshold Hysterisis 200 200 mV Input Current (Internal Pull-Up) Disconnect = 0V 6 15 6 15 µA TEMPERATURE RANGE Operating 07 0 0 7 0 °C Storage –40 150 –40 150 °C θJL (junction to lead) 20 20 °C/W NOTE: (1) Measurement of each termination line while the other 17 lines are held low (0.5V). Disconnect Termination Line 1 Termination Line 2 Termination Line 3 Termination Line 4 Termination Line 5 (Thermal) GND (Thermal) GND (Thermal) GND Termination Line 6 Termination Line 7 Termination Line 8 Termination Line 9 Termpwr GND Termination Line 18 Termination Line 17 Termination Line 16 Termination Line 15 Termination Line 14 GND (Thermal) GND (Thermal) GND (Thermal) Termination Line 13 Termination Line 12 Termination Line 11 Termination Line 10 Reg Out REG5601 NOTE: Pin 28 is electrical ground. Connect pins 7, 8, 9, 20, 21, 22 to large circuit trace for proper heat sinking. Connect to ground or leave open-circuit. TA = 0°C to +70°C, Termpwr = 4.75V, and Disconnect = 0V unless otherwise specified. PACKAGE/ORDERING INFORMATION PACKAGE DRAWING MODEL PACKAGE NUMBER (1) REG5601U Plastic 28-Lead SOIC 217 REG5601E Plastic 28-Lead SSOP 324 NOTE: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix D of Burr-Brown IC Data Book. ELECTROSTATIC DISCHARGE SENSITIVITY This integrated circuit can be damaged by ESD. Burr-Brown recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant any BURR-BROWN product for use in life support devices and/or systems.