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| LIN D O C #: 5212 LX5212 9-LINE LOW CAPACITANCE, POWER SCSI TERMINATOR T HE I NFINITE P OWER OF I N N O VAT I O N P RODUCTION D ATA S HEET DESCRIPTION The LX5212 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 LX5212 requires a meager 500nA of supply current while offering only 2.5pF of output capacitance. To enter this low-power mode, the disconnect pin can be left open (floating) or driven high, 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 LX5212 consumes only 600A 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 LX5212 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. And the LX5212 sinks up to 30mA of current, making it compatible with today's fast active negation drivers. The LX5212 is a superior, pin-for-pin replacement for a variety of industry products, such as the UC5614. K E Y F E AT U R E S s 2.5pF OUTPUT CAPACITANCE DURING DISCONNECT s 500nA SUPPLY CURRENT IN DISCONNECT MODE s 600A SUPPLY CURRENT DURING NORMAL OPERATION s 30mA SINK CURRENT FOR ACTIVE NEGATION s LOGIC COMMAND DISCONNECTS ALL TERMINATION LINES s CURRENT LIMIT AND THERMAL PROTECTION s COMPATIBLE WITH SCSI 1, 2, 3, AND FAST 20 STANDARDS s HOT SWAP COMPATIBLE s CONSULT FACTORY FOR APPLICATION TEST REPORT: 5212TR s EVALUATION BOARD AVAILABLE IMPORTANT: For the most current data, consult LinFinity's web site: http://www.linfinity.com. PRODUCT HIGHLIGHT RE C E I V I N G WAV E F O R M - 20MHZ DR I V I N G W AV E F O R M - 20MHZ Receiver 1 Meter, AWG 28 LX5212 LX5268 Driver LX5212 LX5268 NOTE: For An In-Depth Discussion On Applying SCSI, Request Linfinity Application Note: "Understanding The Single-Ended SCSI Bus" PA C K A G E O R D E R I N F O R M AT I O N TA (C) 0 to 70 N Plastic DIP 16-pin LX5212CN PWP Plastic TSSOP 24-pin, Power LX5212CPWP DP Plastic SOIC 16-pin, Power LX5212CDP Note: All surface-mount packages are available in Tape & Reel. Append the letter "T" to part number. (i.e. LX5212CDPT) Copyright (c) 1997 Rev. 1.8 11/97 LINFINITY MICROELECTRONICS INC. 11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570 1 PRODUCT DATABOOK 1996/1997 LX5212 9-LINE LOW CAPACITANCE, POWER SCSI TERMINATOR 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 T7 T8 T9 N.C. GND DISCONNECT T1 T2 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 ................................................................................... 0.4A Operating Junction Temperature Plastic (N, PWP, DP Packages) .................................................................... 150C Storage Temperature Range .............................................................. -65C to 150C Lead Temperature (Soldering, 10 seconds) .................................................... 300C 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. T6 T5 REG OUT N.C. N.C. VTERM T4 T3 N PACKAGE (Top View) T H E R MAL DATA N PACKAGE: THERMAL RESISTANCE-JUNCTION TO AMBIENT, JA PWP PACKAGE: THERMAL RESISTANCE-JUNCTION TO LEADS, JL THERMAL RESISTANCE-JUNCTION TO AMBIENT, JA DP PACKAGE: THERMAL RESISTANCE-JUNCTION TO LEADS, JL THERMAL RESISTANCE-JUNCTION TO AMBIENT, JA 20C/W 50C/W 27C/W 100C/W 65C/W T7 T8 T9 N.C. GND HEATSINK/GND HEATSINK/GND HEATSINK/GND HEATSINK/GND DISCONNECT T1 T2 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 T6 T5 REG OUT N.C. HEATSINK/GND HEATSINK/GND HEATSINK/GND HEATSINK/GND N.C. VTERM T4 T3 Junction Temperature Calculation: TJ = TA + (PD x JA). The JA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow. T7 T8 T9 HEATSINK/GND GND DISCONNECT T1 T2 PWP PACKAGE (Top View) 16 2 3 4 5 6 7 8 15 14 13 12 11 10 9 POWER UP / POWER DOWN FUNCTION TABLE Disconnect L H Open Outputs Enabled HI Z HI Z Quiescent Current 600A 0.5A 0.5A T6 T5 REG OUT HEATSINK/GND HEATSINK/GND VTERM T4 T3 DP PACKAGE (Top View) 2 Copyright (c) 1997 Rev. 1.8 11/97 PRODUCT DATABOOK 1996/1997 LX5212 9-LINE LOW CAPACITANCE, POWER SCSI TERMINATOR 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 REGOUT Operating Virtual Junction Temperature Range LX5212C 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 F C 125 ELECTRICAL CHARACTERISTICS (Unless otherwise specified, these specifications apply over the operating ambient temperature range of 0C T A 70C. TermPwr = 4.75V, Disconnect = 0V. 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. LX5212 Typ. Max. 0.6 194 0.5 1.2 210 1 116 120 -23 -23 -23 -23 100 100 2.5 Units ITERM ITERM ZOUT VOUT IOUT All term lines = Open All term lines = 0.5V Disconnect = Open IOUT = -5mA to -15mA, TA = 25C IOUT = -5mA to -15mA VOUT = 0.5V, T A = 25C VOUT = 0.5V VOUT = 0.5V, V TERM = 4V, TA = 25C VOUT = 0.5V, VTERM = 4V Disconnect = Open, VOUT = 0.5V to 4V, TA = 25C Disconnect = Open, VTERM = Open, VOUT = 0.5V to 4V, TA = 25C Disconnect = Open, Note 3, DP Package VOUT = 4V 104 100 2.7 -20.3 -19.0 -19.5 -18.0 mA mA A V mA mA mA mA nA nA pF mA V mV mV V mA C V A Output Section (Terminator Lines) Terminator Impedance Terminator Output High Voltage Max. Output Current 110 110 2.9 -21.8 -21.8 -21.8 -21.8 10 10 1.8 30 3.6 10 20 0.7 -200 150 0.8 Disconnect = 0V Output Leakage Output Capacitance Sink Current COUT 20 Regulator Section Regulator Output Voltage Line Regulation Load Regulation Drop Out Voltage Short Circuit Current Thermal Shutdown VREG VTERM = 4V to 6V I REG = 0 to -50mA IREG = -50mA VREG = 0V 20 50 1.0 -350 VDO ISC Disconnect Section Disconnect Threshold Input Current 2.0 40 Note 3. This parameter, while guaranteed by design, is not 100% production tested. Copyright (c) 1997 Rev. 1.8 11/97 3 PRODUCT DATABOOK 1996/1997 LX5212 9-LINE LOW CAPACITANCE, POWER SCSI TERMINATOR P RODUCTION D ATA S HEET BLOCK DIAGRAM FIGURE 1 -- LX5212 BLOCK DIAGRAM REG OUT VTERM DISCONNECT VBG T0 VTERM Channel 1 of 9 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 2.2F TERM POWER VTERM HOST PERIPHERAL TERM POWER VTERM 2.2F 5V DISCONNECT LX5212 REGOUT 2.2F LX5212 DB (6) DB (7) DB (P) DB (6) DB (7) DB (P) ~~~ REGOUT 2.2F TERMPWR VTERM TERMPWR DISCONNECT SCSI CABLE LX5212 REGOUT 2.2F LX5212 ACK RST MSG ACK RST MSG ~~~ REGOUT 2.2F Note: Add third LX5212 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. 4 Copyright (c) 1997 Rev. 1.8 11/97 DISCONNECT ATN BSY VTERM ATN BSY ~~ DISCONNECT DB (0) DB (1) ~~ DB (0) DB (1) |
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