LIN D O C #: 5212 LX5212 9-LINE LOW CAPACITANCE, µP OWER SCSI TERMINATOR T H E I N F I N I T E P O W E R O F I P N N O VA T I O N R O D U C T I O N 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 D A T A S H E E T K E Y F E AT U R E S ■ 2.5pF OUTPUT CAPACITANCE DURING DISCONNECT 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 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. ■ 500nA SUPPLY CURRENT IN DISCONNECT MODE ■ 600µA SUPPLY CURRENT DURING NORMAL OPERATION ■ 30mA SINK CURRENT FOR ACTIVE NEGATION ■ LOGIC COMMAND DISCONNECTS ALL TERMINATION LINES ■ CURRENT LIMIT AND THERMAL PROTECTION ■ COMPATIBLE WITH SCSI 1, 2, 3, AND FAST 20 STANDARDS ■ HOT SWAP COMPATIBLE ■ CONSULT FACTORY FOR APPLICATION TEST REPORT: 5212TR ■ EVALUATION BOARD AVAILABLE 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 - 20MHZ D R I V I N G W AV E F O R M - 20MHZ Receiver Driver 1 Meter, AWG 28 LX5212 LX5212 LX5268 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 DIP N Plastic 16-pin LX5212CN TSSOP PWP Plastic 24-pin, Power LX5212CPWP SOIC DP Plastic 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 © 1997 Rev. 1.8 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 LX5212 9-LINE LOW CAPACITANCE, µP OWER SCSI TERMINATOR P R O D U C T I O N A B S O L U T E M A X I M U M R AT I N G S D A T A S H E E T PACKAGE PIN OUTS (Note 1) TermPwr Voltage ................................................................................................. +7V Signal Line Voltage ................................................................................... 0V to +7V Regulator Output Current ................................................................................... 0.4A Operating Junction Temperature Plastic (N, PWP, DP Packages) .................................................................... 150°C Storage Temperature Range .............................................................. -65°C to 150°C Lead Temperature (Soldering, 10 seconds) .................................................... 300°C T7 T8 T9 N.C. GND DISCONNECT T1 T2 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. T H E R MAL DATA N PACKAGE: THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ JA 65°C/W PWP PACKAGE: THERMAL RESISTANCE-JUNCTION TO LEADS, θJL 27°C/W THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ JA 100°C/W DP PACKAGE: THERMAL RESISTANCE-JUNCTION TO LEADS, θJL 20°C/W THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ JA 50°C/W Disconnect L H Open 2 Outputs Enabled HI Z HI Z Quiescent Current 600µA 0.5µA 0.5µA 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 T6 T5 REG OUT N.C. N.C. VTERM T4 T3 N PACKAGE (Top View) T7 T8 T9 N.C. GND HEATSINK/GND HEATSINK/GND HEATSINK/GND HEATSINK/GND DISCONNECT T1 T2 1 24 2 23 3 22 4 21 5 20 6 19 7 18 8 17 9 16 10 15 11 14 12 13 T6 T5 REG OUT N.C. HEATSINK/GND HEATSINK/GND HEATSINK/GND HEATSINK/GND N.C. VTERM T4 T3 PWP PACKAGE (Top View) 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. POWER UP / POWER DOWN FUNCTION TABLE 1 T7 T8 T9 HEATSINK/GND GND DISCONNECT T1 T2 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 T6 T5 REG OUT HEATSINK/GND HEATSINK/GND VTERM T4 T3 DP PACKAGE (Top View) Copyright © 1997 Rev. 1.8 11/97 PRODUCT DATABOOK 1996/1997 LX5212 9-LINE LOW CAPACITANCE, µP OWER SCSI TERMINATOR P R O D U C T I O N D A T A S H E E T 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 Symbol TermPwr Voltage Signal Line Voltage Disconnect Input Voltage Output Capacitor on REGOUT Operating Virtual Junction Temperature Range LX5212C (Note 2) Recommended Operating Conditions Min. Typ. Max. VTERM Units 4 0 0 2.2 5.25 5 VTERM V V V µF 0 125 °C Note 2. Range over which the device is functional. 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 = 0V. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.) Parameter Symbol Test Conditions Min. LX5212 Typ. Max. Units Supply Current Section TermPwr Supply Current ITERM Power Down Mode ITERM All term lines = Open All term lines = 0.5V Disconnect = Open 0.6 194 0.5 1.2 210 1 mA mA µA 110 110 2.9 -21.8 -21.8 -21.8 -21.8 10 10 1.8 30 116 120 Ω Ω V mA mA mA mA nA nA pF mA Output Section (Terminator Lines) Terminator Impedance ZOUT Terminator Output High Voltage Max. Output Current VOUT IOUT Output Leakage Output Capacitance Sink Current COUT IOUT = -5mA to -15mA, TA = 25°C IOUT = -5mA to -15mA VOUT = 0.5V, T A = 25°C VOUT = 0.5V VOUT = 0.5V, V TERM = 4V, TA = 25°C VOUT = 0.5V, VTERM = 4V Disconnect = Open, VOUT = 0.5V to 4V, TA = 25°C Disconnect = Open, VTERM = Open, VOUT = 0.5V to 4V, TA = 25°C Disconnect = Open, Note 3, DP Package VOUT = 4V 104 100 2.7 -20.3 -19.0 -19.5 -18.0 20 -23 -23 -23 -23 100 100 2.5 Regulator Section Regulator Output Voltage Line Regulation Load Regulation Drop Out Voltage Short Circuit Current Thermal Shutdown VREG VDO ISC 3.6 10 20 0.7 -200 150 VTERM = 4V to 6V I REG = 0 to -50mA IREG = -50mA VREG = 0V 20 50 1.0 -350 V mV mV V mA °C 2.0 40 V µA Disconnect Section Disconnect Threshold Input Current 0.8 Disconnect = 0V Note 3. This parameter, while guaranteed by design, is not 100% production tested. Copyright © 1997 Rev. 1.8 11/97 3 PRODUCT DATABOOK 1996/1997 LX5212 9-LINE LOW CAPACITANCE, µP OWER SCSI TERMINATOR P R O D U C T I O N D A T A S H E E T BLOCK DIAGRAM FIGURE 1 — LX5212 BLOCK DIAGRAM REG OUT VTERM VTERM DISCONNECT Channel 1 of 9 VBG 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 TERM POWER VTERM VTERM DB (0) DB (1) DB (0) DB (1) DB (6) DB (7) DB (P) DB (6) DB (7) DB (P) ~ ~ ~ REGOUT REGOUT 2.2µF TERMPWR TERMPWR ~ ~ ATN BSY ~ ~ ~ DISCONNECT VTERM ACK RST MSG VTERM SCSI CABLE ATN BSY LX5212 REGOUT 2.2µF 2.2µF LX5212 LX5212 2.2µF 5V DISCONNECT PERIPHERAL DISCONNECT 2.2µF ~ ~ 5V DISCONNECT HOST TERM POWER LX5212 ACK RST MSG REGOUT 2.2µF 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 © 1997 Rev. 1.8 11/97