UltraMAX™ 9-CHANNEL PLUG T H E I N F I N I T E P O W E R O F I P N N O V A T I O N LX5218 AND PLAY SCSI TERMINATOR R O D U C T I O N D A T A H E E T KEY FEATURES DESCRIPTION The LX5218 SCSI terminator is part of Linfinity's UltraMAX family of high-performance, adaptive, nonlinear mode SCSI products, which are designed to deliver true UltraSCSI performance in SCSI applications. The low voltage BiCMOS architecture employed in their design offers superior performance to older linear passive and active techniques. Linfinity's UltraMAX architecture employs high-speed adaptive elements for each channel, thereby providing the fastest response possible — typically 35MHz, which is 100 times faster than the older linear regulator/ terminator approach used by other manufacturers. Products using this older linear regulator approach have bandwidths which are dominated by the output capacitor and which are limited to 500KHz (see further discussion in the Functional Description section). The UltraMAX architecture also eliminates the output compensation capacitor typical in earlier terminator designs. It is approved for use with SCSI1, -2, -3, UltraSCSI and beyond — providing the highest performance alternative available today. Another key improvement offered by the LX5218 lies in its ability to insure reliable, error free communications even in systems which do not adhere to recommended SCSI hardware design guidelines, such as the use of improper cable lengths and S SCSI PLUG AND PLAY, DUAL LOW DISCONNECT, LOGIC LOW COMMAND DISCONNECTS ALL TERMINATION LINES HOT SWAP COMPATIBLE ULTRA-FAST RESPONSE FOR FAST-20 SCSI APPLICATIONS 35MHz CHANNEL BANDWIDTH 3.5V OPERATION LESS THAN 3pF OUTPUT CAPACITANCE DISABLE-MODE CURRENT LESS THAN 275µA THERMALLY SELF LIMITING NO EXTERNAL COMPENSATION CAPACITORS IMPLEMENTS 8-BIT OR 16-BIT ( WIDE) APPLICATIONS COMPATIBLE WITH ACTIVE NEGATION DRIVERS (60mA / CHANNEL) COMPATIBLE WITH PASSIVE AND ACTIVE TERMINATIONS APPROVED FOR USE WITH SCSI-1, -2, -3 AND ULTRASCSI CONSULT FACTORY FOR APPLICATION TEST REPORT bs ol et e impedances. Frequently, this situation is not controlled by the peripheral or host designer and, when problems occur, they are the first to be made aware of the problem. The LX5218 architecture is much more tolerant of marginal system integrations. The LX5218 has two disconnect pins for SCSI Plug and Play (PnP) applications. Quiescent current is typically less than (275µA) in disable mode, while the output capacitance is also less than 3pF. The obvious advantage of extended battery life for portable systems is inherent in the product's sleepmode feature. Additionally, the disable function permits factory-floor or production-line configurability, reducing inventory and product-line diversity costs. Field configurability can also be accomplished without physically removing components which, often times results in field returns due to mishandling. Reduced component counts is also inherent in the LX5218 architecture. Traditional termination techniques require large stabilization and transient protection capacitors of up to 20µF in value and size. The LX5218 architecture does not require these components, allowing all the cost savings associated with inventory, board space, assembly, reliability, and component costs. IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com O PRODUCT HIGHLIGHT Receiver Driver 1 Meter, AWG 28 LX5218 TA (°C) 0 to 70 LX5218 LX5268 LX5268 -----NOTE----For An In-Depth Discussion On Apply SCSI, Visit www.microsemi.com/support/micnotes.asp and view the SCSI Solutions Section (Series 1200) PACKAGE ORDER INFO Plastic TSSOP Plastic SOWB DW 16-Pin PW 20-Pin RoHS Compliant / Pb-free Transition DC: 0516 RoHS Compliant / Pb-free Transition DC: 0442 LX5218CDW LX5218CPW Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX5218CDW-TR) Copyright © 1997 Rev. 1.7a,2005-03-01 LINFINITY MICROELECTRONICS INC. 11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570 1 P R O D U C T D ATA B O O K 1 9 9 6 / 1 9 9 7 UltraMAX LX5218 9-CHANNEL PLUG P AND 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 P L AY S C S I T E R M I N A T O R D A T A S H E E T (Note 1) Continuous Termination Voltage .......................................................................... 10V Continuous Output Voltage Range .............................................................. 0 to 5.5V Continuous Disable Voltage Range ............................................................. 0 to 5.5V Operating Junction Temperature ........................................................... 0°C to 125°C Storage Temperature Range ............................................................. -65°C to +150°C RoHS / Pb-free Peak Package Solder Relow Temp. (40 sec. max. exp.)....260°C (+0,-5) TERM POWER N.C. D0 D1 D2 D3 D4 GND 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 bs ol et e Note 1. Exceeding these ratings could cause damage to the device. PA C K A G E P I N O U T S DW PACKAGE (Top View) T H E R M A L D ATA DW PACKAGE: THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA PW PACKAGE: THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA TERM POWER DISC1 DISC2 D8 D7 D6 D5 GND 95°C/W 144°C/W Junction Temperature Calculation: TJ = TA + (PD x θJA). The θJA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow. TERM POWER N.C. N.C. D0 D1 D2 D3 D4 N.C. GND 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 10 12 11 TERM POWER DISC1 DISC2 D8 D7 N.C. D6 D5 N.C. GND PW PACKAGE (Top View) O RoHS / Pb-free 100% Matte Tin Lead Finish 2 Copyright © 1997 Rev. 1.7a P R O D U C T D ATA B O O K 1 9 9 6 / 1 9 9 7 UltraMAX LX5218 9-CHANNEL PLUG P AND R O D U C T I O N P L AY S C S I T E R M I N AT O R 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 Termination Voltage High Level Disable Input Voltage Low Level Disable Input Voltage Operating Virtual Junction Temperature Range LX5218C VTERM VIH VIL (Note 2) Recommended Operating Conditions Min. Typ. Max. Units 3.5 2 0 5.5 VTERM 0.8 V V V 0 125 °C bs ol et e Note 2. Range over which the device is functional. ELECTRICAL CHARACTERISTICS Term Power = 4.75V unless otherwise specified. Unless otherwise specified, these specifications apply at the recommended operating ambient temperature of TA = 25°C. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature. Parameter Symbol VOUT ICC Output Current Disable Input Current IOUT IIN Output Leakage Current Capacitance in Disabled Mode Channel Bandwidth Termination Sink Current, per Channel IOL COUT BW I SINK Min. 2.65 All data lines = open All data lines = 0.5V DISC1 Pin = DISC2 Pin = 0V VOUT = 0.5V DISC1 Pin = DISC2 Pin = 4.75V DISC1 Pin = DISC2 Pin = 0V DISC1 Pin = DISC2 Pin = 0V, V O = 0.5V VOUT = 0V, frequency = 1MHz VOUT = 4V -21 LX5218 Typ. Max. 2.85 6 215 275 -23 90 -10 10 3 35 60 9 225 -24 Units V mA mA µA mA µA nA nA pF MHz mA O Output High Voltage TermPwr Supply Current Test Conditions Copyright © 1997 Rev. 1.7a 3 P R O D U C T D ATA B O O K 1 9 9 6 / 1 9 9 7 UltraMAX LX5218 9-CHANNEL PLUG P AND R O D U C T I O N P L AY S C S I T E R M I N A T O R D A T A S H E E T BLOCK DIAGRAM TERM POWER CURRENT BIASING CIRCUIT 24mA CURRENT LIMITING CIRCUIT DATA OUTPUT PIN DB(0) bs ol et e THERMAL LIMITING CIRCUIT 2.85V DISC1 DISC2 1 OF 9 CHANNELS FUNCTIONAL DESCRIPTION O Cable transmission theory suggests to optimize signal speed respond to line demands by delivering 24mA on assertion and and quality, the termination should act both as an ideal voltage by imposing 2.85V on deassertion. In order to disable the reference when the line is released (deasserted) and as an device, the DISC1 and DISC2 pins must be driven logic Low. ideal current source when the line is active (asserted). This mode of operation places the device in a sleep state where Common active terminators, a meager 275µA of quiescent curwhich consist of Linear Regulators rent is consumed. Additionally, all POWER UP / POWER DOWN FUNCTION TABLE in series with resistors (typically outputs are in a Hi-Z (impedance) 110Ω), are a compromise. As the state. Sleep mode can be used for Quiescent DISC1 DISC2 Outputs line voltage increases, the amount power conservation or to comCurrent of current decreases linearly by the pletely eliminate the terminator H H Enabled 6mA equation V = I * R. The LX5218, from the SCSI chain. In the second H L Enabled 6mA with its unique new architecture case, termination node capacitance L H Enabled 6mA applies the maximum amount of is important to consider. The tercurrent regardless of line voltage minator will appear as a parasitic L L Disabled 275µA until the termination high threshdistributed capacitance on the line, Open Open Enabled 6mA old (2.85V) is reached. which can detract from bus perActing as a near ideal line terformance. For this reason, the minator, the LX5218 closely reproduces the optimum case LX5218 has been optimized to have only 3pF of capacitance when the device is enabled. To enable the device the DISC1 per output in the sleep state. and DISC2 Pins must be pulled logic High, Open, or any An additional feature of the LX5218 is its compatibility with combination of both High and Low. During this mode of active negation drivers. The device handles up to 60mA of operation, quiescent current is 6mA and the device will sink current for drivers which exceed the 2.85V output high. 4 Copyright © 1997 Rev. 1.7a P R O D U C T D ATA B O O K 1 9 9 6 / 1 9 9 7 UltraMAX LX5218 9-CHANNEL PLUG P AND P L AY S C S I T E R M I N AT O R R O D U C T I O N D A T A S GRAPH / CURVE INDEX H E E T FIGURE INDEX Waveforms Application Circuits FIGURE # FIGURE # 1A. RECEIVING WAVEFORM (Freq. = 1.0MHz) 16. 8-BIT SCSI SYSTEM APPLICATION 1B. DRIVING WAVEFORM 2A. RECEIVING WAVEFORM (Freq. = 5.0MHz) 2B. DRIVING WAVEFORM 10MHz WAVEFORM 4. 20MHz WAVEFORM bs ol et e 3. Characteristic Curves FIGURE # 5. OUTPUT HIGH VOLTAGE vs. JUNCTION TEMPERATURE 6. OUTPUT CURRENT vs. JUNCTION TEMPERATURE 7. OUTPUT CURRENT vs. OUTPUT HIGH VOLTAGE (VT = 4.75V) 8. OUTPUT CURRENT vs. OUTPUT HIGH VOLTAGE (VT = 3.3V) 9. TERMINATION VOLTAGE vs. SUPPLY CURRENT 10. TERMPWR SUPPLY CURRENT vs. TERMINATION VOLTAGE (Disabled) — LX5218 11. OUTPUT HIGH VOLTAGE vs. JUNCTION TEMPERATURE (VT = 3.3V) 12. OUTPUT CURRENT vs. JUCTION TEMPERATURE (VT = 3.3V) 13. OUTPUT HIGH VOLTAGE vs. TERMINATION VOLTAGE 14. OUTPUT CURRENT vs. TERMINATION VOLTAGE O 15. OUTPUT CURRENT MATCHING CHANNEL TO CHANNEL Copyright © 1997 Rev. 1.7a 5 P R O D U C T D ATA B O O K 1 9 9 6 / 1 9 9 7 UltraMAX LX5218 9-CHANNEL PLUG P AND R O D U C T I O N P L AY S C S I T E R M I N A T O R D CHARACTERISTIC FIGURE 1A. — RECEIVING WAVEFORM S A T A CURVES FIGURE 1B. — DRIVING WAVEFORM 3.5 3.5 freq.=1.03844MHz freq.=1.00266MHz 3 3 2.5 2.5 Line Voltage - (V) bs ol et e Line Voltage - (V) H E E T 2 1.5 1 2 1.5 1 0.5 0.5 GND GND -0.5 -0.5 Time - (250ns/Div.) Time - (250ns/Div.) END-DRIVEN CABLE Receiver Fig. 1A Driver Fig. 1B 6 Meter, 92W LX5218 LX5218 75C08 O 75C08 6 Copyright © 1997 Rev. 1.7a P R O D U C T D ATA B O O K 1 9 9 6 / 1 9 9 7 UltraMAX LX5218 9-CHANNEL PLUG P AND R O D U C T I O N P L AY S C S I T E R M I N AT O R D CHARACTERISTIC FIGURE 2A. — RECEIVING WAVEFORM S A T A CURVES FIGURE 2B. — DRIVING WAVEFORM 3.5 3.5 freq.=4.9961MHz freq.=5.0092MHz 3 3 2.5 2.5 Line Voltage - (V) bs ol et e Line Voltage - (V) H E E T 2 1.5 1 2 1.5 1 0.5 0.5 GND GND -0.5 -0.5 Time - (50ns/Div.) Time - (50ns/Div.) END-DRIVEN CABLE Receiver Fig. 2A Driver Fig. 2B 6 Meter, 92W LX5218 LX5218 75C08 O 75C08 Copyright © 1997 Rev. 1.7a 7 P R O D U C T D ATA B O O K 1 9 9 6 / 1 9 9 7 UltraMAX LX5218 9-CHANNEL PLUG P AND R O D U C T I O N P L AY S C S I T E R M I N A T O R D A T A CHARACTERISTIC FIGURE 3. — 10MHz WAVEFORM S CURVES FIGURE 4. — 20MHz WAVEFORM 4 4 Ch2 Freq.=20.020MHz Ch2 Freq.=10.096MHz 3 3 2 2 #1 #2 bs ol et e #2 Line Voltage - (V) Line Voltage - (V) H E E T 1 #1 0 #3 4 1 0 #3 4 GND GND Time - (10ns/Div.) Time - (20ns/Div.) END-DRIVEN CABLE 4.75V LX5218 1 6 Meter, 72W LX5268 2 4.75V LX5218 LX5268 O 3 8 Copyright © 1997 Rev. 1.7a P R O D U C T D ATA B O O K 1 9 9 6 / 1 9 9 7 UltraMAX LX5218 9-CHANNEL PLUG P AND R O D U C T I O N P L AY S C S I T E R M I N AT O R D A T A CHARACTERISTIC H E E T CURVES FIGURE 6. — OUTPUT CURRENT vs. JUNCTION TEMP. 30 4 25 (IOUT) Output Current - (mA) 4.5 bs ol et e (VOUT) Output High Voltage - (V) FIGURE 5. — OUTPUT HIGH VOLTAGE vs. JUNCTION TEMP. S 3.5 3 2.5 20 15 10 VT = 4.75V 2 5 0 25 50 75 125 100 0 (TJ) Junction Temperature - (°C) 25 50 75 FIGURE 8. — OUTPUT CURRENT vs. OUTPUT HIGH VOLTAGE 25 25 VT = 4.75V TA = 25°C VT = 3.3V TA = 25°C (IOUT) Output Current - (mA) 20 O (IOUT) Output Current - (mA) 125 (TJ) Junction Temperature - (°C) FIGURE 7. — OUTPUT CURRENT vs. OUTPUT HIGH VOLTAGE 15 10 5 0 20 15 10 5 0 0 0.4 0.8 1.2 1.6 2 2.4 2.8 (VOUT) Output High Voltage - (V) Copyright © 1997 Rev. 1.7a 100 3.2 0 0.4 0.8 1.2 1.6 2 2.4 2.8 3.2 (VOUT) Output High Voltage - (V) 9 P R O D U C T D ATA B O O K 1 9 9 6 / 1 9 9 7 UltraMAX LX5218 9-CHANNEL PLUG P AND R O D U C T I O N P L AY S C S I T E R M I N A T O R D A T A CHARACTERISTIC FIGURE 9. — TERMPWR SUPPLY CURRENT S CURVES FIGURE 10. — LX5218 TERMPWR SUPPLY CURRENT vs. TERMINATION VOLTAGE (Disabled) 400 6 350 (ICC) TermPwr Supply Current - (µA) 7 300 bs ol et e (ICC) TermPwr Supply Current - (mA) vs. TERMINATION VOLTAGE 5 4 3 2 1 0 2.5 250 200 150 100 50 0 3.5 3 4 4.5 5 6 5.5 0 (VTERM) Termination Voltage - (V) 2 3 4 5 6 FIGURE 12. — OUTPUT CURRENT vs. JUNCTION TEMP. 30 4.5 VT = 3.3V (IOUT) Output Current - (mA) VT = 3.3V 4 O (VOUT) Output High Voltage - (V) 1 (VTERM) Termination Voltage - (V) FIGURE 11. — OUTPUT HIGH VOLTAGE vs. JUNCTION TEMP. 3.5 3 2.5 25 20 15 10 5 2 0 25 50 75 100 (TJ) Junction Temperature - (°C) 10 H E E T 125 0 25 50 75 100 125 (TJ) Junction Temperature - (°C) Copyright © 1997 Rev. 1.7a P R O D U C T D ATA B O O K 1 9 9 6 / 1 9 9 7 UltraMAX LX5218 9-CHANNEL PLUG P AND R O D U C T I O N P L AY S C S I T E R M I N AT O R D CHARACTERISTIC FIGURE 13. — OUTPUT HIGH VOLTAGE S A T A H E E T CURVES FIGURE 14. — OUTPUT CURRENT vs. TERMINATION VOLTAGE vs. TERMINATION VOLTAGE 25 (VOUT) Output High Voltage - (V) 3.5 3 20 bs ol et e (VOUT) Output High Voltage - (V) 4 2.5 2 1.5 1 15 10 5 0.5 0 0 3 3.5 4 4.5 5 5.5 3 3.5 4 4.5 5 5.5 6 (VTERM) Termination Voltage - (V) O (VTERM) Termination Voltage - (V) 6 Copyright © 1997 Rev. 1.7a 11 P R O D U C T D ATA B O O K 1 9 9 6 / 1 9 9 7 UltraMAX LX5218 9-CHANNEL PLUG P AND R O D U C T I O N P L AY S C S I T E R M I N A T O R D A T A CHARACTERISTIC S H E E T CURVES FIGURE 15. — OUTPUT CURRENT CHANNEL TO CHANNEL MATCHING 24 bs ol et e 23.5 Io (mA) 23 23.5 - 24 23 - 23.5 22.5 - 23 22 - 22.5 21.5 - 22 21 - 21.5 22.5 22 21.5 i8 i6 21 i4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 i0 Part # 21 22 23 24 25 Channel i2 A P P L I C A T I O N S C H E M AT I C FIGURE 16 — 8-BIT SCSI SYSTEM APPLICATION HOST TERM POWER DISC1 VTERM LX5218 O DISC2 TERMPWR ~ ~ LX5218 ~ ~ ~ DISC2 DB (0) DB (1) DB (0) DB (1) DB (6) DB (7) DB (P) LX5218 DB (6) DB (7) DB (P) TERMPWR VTERM DISC1 TERM POWER VTERM ~ ~ 2.2µF PERIPHERAL ~ ~ ~ 5V TERMPWR 5V 2.2µF DISC1 DISC2 TERMPWR VTERM ATN BSY SCSI CABLE ACK RST MSG ATN BSY ACK RST MSG LX5218 DISC1 DISC2 Note: Add third LX5218 for 16-bit SCSI TM UltraMAX is a trademark of Linfinity Microelectronics Inc. PRODUCTION DATA - Information contained in this document is proprietary to Linfinity, 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. 12 Copyright © 1997 Rev. 1.7a