LX5107CDW

LIN D O C # : 5107 LX5107 9-L INE L OW C APACITANCE , µP OWER S CSI T ERMINATOR T HE I NFINITE P OWER OF I N N O VAT I O N P RODUCTION D ATA S HEET DESCRIPTION The LX5107 is a nine-line active terminator for the SCSI parallel bus. This SCSI standard recommends active termination at both ends of the SCSI bus. During disconnect mode, the LX5107 requires a meager 30µA of supply current while offering only 3.0pF of output capacitance. To enter this low-power mode, the disconnect pin should be driven low thereby disconnecting the terminating resistors and placing the internal low dropout regulator into low-power mode. In disconnect mode, each termination line presents a high impedance to the SCSI bus with the overall effect being to preserve high signal integrity and yield subsequent reliable, error free communications. During normal operation, the LX5107 consumes only 600µA of current which is the lowest enabled supply current of any terminator available on the market today. Linfinity's proprietary BiCMOS low dropout regulator architecture enables this unique and very efficient operating characteristic. The LX5107 also offers a precisely trimmed channel output current specified to a 5% tolerance. The maximum value of the output current is trimmed as closely as possible to the SCSI standard maximum specification to give the highest possible noise margin for fast SCSI operation. In addition, the LX5107 sinks up to 50mA of current making it compatible with today's fast active negation drivers. The LX5107 is a superior, pin-for-pin replacement for a variety of industry products such as the DS2107S and DS21S07A. K E Y F E AT U R E S s 3.0pF OUTPUT CAPACITANCE DURING DISCONNECT s 30µA SUPPLY CURRENT IN DISCONNECT MODE s 600µA SUPPLY CURRENT DURING NORMAL OPERATION s 50mA SINK CURRENT FOR ACTIVE NEGATION s LOGIC COMMAND DISCONNECTS ALL TERMINATION LINES s CURRENT LIMIT AND THERMAL PROTECTION s COMPATIBLE WITH SCSI 1, 2 AND 3 STANDARDS s MEETS SCSI HOT PLUGGING CAPABILITY s CONSULT FACTORY FOR APPLICATION TEST REPORT: 5107TR IMPORTANT: For the most current data, consult LinFinity's web site: http://www.linfinity.com. PRODUCT HIGHLIGHT R E C E I V I N G W AV E F O R M - 1 0MH Z D R I V I N G W AV E F O R M - 1 0MH Z Receiver 1 Meter, AWG 28 LX5107 LX5268 Driver LX5107 LX5268 PA C K A G E O R D E R I N F O R M AT I O N TJ (°C) 0 to 70 DW Plastic SOWB 16-pin LX5107CDW PWP Plastic TSSOP 20-pin, Power LX5107CPWP NOTE: For An In-Depth Discussion On Applying SCSI, Request Linfinity Application Note: "Understanding The Single-Ended SCSI Bus" Note: All surface-mount packages are available in Tape & Reel. Append the letter "T" to part number. (i.e. LX5107CDWT) Copyright © 1997 Rev. 1.2 11/97 LINFINITY MICROELECTRONICS INC. 11861 W ESTERN A VENUE, G ARDEN G ROVE, CA. 92841, 714-898-8121, F AX: 714-893-2570 1 PRODUCT DATABOOK 1996/1997 LX5107 9 -L INE L OW C APACITANCE , µP OWER S CSI T ERMINATOR P RODUCTION D ATA S HEET A B S O L U T E M A X I M U M R AT I N G S (Note 1) PACKAGE PIN OUTS VTERM R1 R2 R3 R4 R5 VREF1 GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 TermPwr Voltage ................................................................................................. +7V Signal Line Voltage ................................................................................... 0V to +7V Regulator Output Current ................................................................................... 0.5A Operating Junction Temperature Plastic (DW, PW Packages) ......................................................................... 150°C Storage Temperature Range .............................................................. -65°C to 150°C Lead Temperature (Soldering, 10 seconds) .................................................... 300°C Note 1. Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of the specified terminal. PD VREF2 N.C. R9 R8 R7 R6 VTERM DW PACKAGE (Top View) T H E R MAL DATA DW PACKAGE: THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ JA PWP PACKAGE: THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA 95°C/W 83°C/W VTERM HS-GND R1 R2 R3 R4 R5 HS-GND VREF1 GND 20 2 3 4 5 6 7 8 9 10 19 18 17 16 15 14 13 12 11 Junction Temperature Calculation: TJ = TA + (PD x θJA). The θ JA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow. PD VREF2 HS-GND N.C. R9 R8 R7 R6 HS-GND VTERM POWER UP / POWER DOWN FUNCTION T ABLE Disconnect L H Open Outputs HI Z Enabled Enabled Quiescent Current 30µA 600µA 600µA PWP PACKAGE (Top View) 2 Copyright © 1997 Rev. 1.2 11/97 PRODUCT DATABOOK 1996/1997 LX5107 9 -L INE L OW C APACITANCE , µP OWER S CSI T ERMINATOR P RODUCTION D ATA S HEET R E C O M M E N D E D O P E R AT I N G C O N D I T I O N S Parameter TermPwr Voltage Signal Line Voltage Disconnect Input Voltage Output Capacitor on VREF Operating Virtual Junction Temperature Range LX5107C Note 2. Range over which the device is functional. (Note 2) Symbol VTERM Recommended Operating Conditions Min. Typ. Max. 4 0 0 2.2 0 5.25 5 VTERM Units V V V µF °C 70 ELECTRICAL CHARACTERISTICS (Unless otherwise specified, these specifications apply over the operating ambient temperature range of 0°C ≤ T A ≤ 70°C. TermPwr = 4.75V, Disconnect = Open. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.) Parameter Supply Current Section TermPwr Supply Current Power Down Mode Symbol Test Conditions Min. LX5107 Typ. Max. 0.6 194 30 110 110 2.9 -21.8 -21.8 -21.8 -21.8 10 3.0 50 3.6 10 20 0.7 -425 150 2.0 210 70 Units All term lines = Open All term lines = 0.5V Disconnect = Low ITERM = -5mA to -15mA, TA = 25°C ITERM = -5mA to -15mA VOUT = 0.5V, T A = 25°C VOUT = 0.5V, 0°C ≤ TA ≤ 70°C VOUT = 0.5V, V TERM = 4V, TA = 25°C VOUT = 0.5V, V TERM = 4V, 0°C ≤ TA ≤ 70°C Disconnect = Low, VOUT = 0V to 4.0V, TA = +25°C Disconnect = Low VOUT = 4V VREF VTERM = 4V to 6V I REG = 0 to -50mA IREG = -50mA VREG = 0V mA mA µA Ω Ω V mA mA mA mA nA pF mA V mV mV V mA °C V µA Output Section (Terminator Lines) Terminator Impedance Terminator Output High Voltage Max. Output Current 100 2.6 -20.3 -19.0 -19.5 -18.0 120 -23 -23 -23 -23 250 Output Leakage Output Capacitance Sink Current 30 Regulator Section Regulator Output Voltage Line Regulation Load Regulation Drop Out Voltage Short Circuit Current Thermal Shutdown 20 50 1.0 -600 Disconnect Section Disconnect Threshold Input Current 0.8 Disconnect = 0V 1.4 2.0 65 Copyright © 1997 Rev. 1.2 11/97 3 PRODUCT DATABOOK 1996/1997 LX5107 9 -L INE L OW C APACITANCE , µP OWER S CSI T ERMINATOR P FIGURE INDEX RODUCTION D ATA S HEET GRAPH / CURVE INDEX Application Circuits FIGURE # 1. 2. LX5107 BLOCK DIAGRAM 8-BIT SCSI SYSTEM APPLICATION FIGURE # 3. 4. 5. 6. 7. 8. 9. Characteristic Curves OUTPUT CURRENT vs. JUNCTION TEMPERATURE OUTPUT VOLTAGE vs. JUNCTION TEMPERATURE OUTPUT CURRENT vs. TERMPWR OUTPUT CURRENT vs. OUTPUT VOLTAGE OUTPUT VOLTAGE vs. TERMPWR TERMPWR SUPPLY CURRENT vs. TEMPERATURE OUTPUT LEAKAGE vs. OUTPUT VOLTAGE 10. OUTPUT CURRENT vs. OUTPUT LINE (OUTPUT MATCHING) 11. OUTPUT VOLTAGE vs. TIME (HOTSWAP GRAPH) 4 Copyright © 1997 Rev. 1.2 11/97 PRODUCT DATABOOK 1996/1997 LX5107 9 -L INE L OW C APACITANCE , µP OWER S CSI T ERMINATOR P RODUCTION D ATA S HEET BLOCK DIAGRAM FIGURE 1 — LX5107 BLOCK DIAGRAM VREF VTERM DISCONNECT VBG VTERM Channel 1 of 9 T0 VTERM T8 A P P L I C AT I O N S C H E M AT I C FIGURE 2 — 8-BIT SCSI SYSTEM APPLICATION 5V 2.2µF TERM POWER VTERM HOST PERIPHERAL TERM POWER VTERM 2.2µF 5V DISABLE LX5107 VREF 2.2µF LX5107 DB (6) DB (7) DB (P) DB (6) DB (7) DB (P) ~~~ VREF 2.2µF TERMPWR VTERM TERMPWR ATN BSY ACK RST MSG TERMPWR VTERM TERMPWR DISABLE LX5107 VREF 2.2µF LX5107 ACK RST MSG ~~~ VREF 2.2µF Note: Add third LX5107 for 16-bit SCSI PRODUCTION DATA - Information contained in this document is proprietary to Lin Finity, and is current as of publication date. This document may not be modified in any way without the express written consent of LinFinity. Product processing does not necessarily include testing of all parameters. Linfinity reserves the right to change the configuration and performance of the product and to discontinue product at any time. Copyright © 1997 Rev. 1.2 11/97 DISABLE SCSI CABLE ATN BSY ~~ DISABLE DB (0) DB (1) ~~ DB (0) DB (1) 5