L I N D O C # : 5120 UltraMAX TM LX5120 ULTRA 27-L I N E SCSI T E R M I N AT O R 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 LX5120 UltraMAXTM terminator represents next-generation technology for SCSI termination applications. The low-voltage BiCMOS architecture employed in its design offers superior performance to older passive and active techniques. Linfinity's architecture employs high-speed adaptive elements for each channel, providing the fastest response possible. The channel bandwidth is typically 35MHz. The LX5120 compares favorably to older linear regulator approaches whose bandwidth's are dominated by the output compensation capacitor and are limited to the 500KHz bandwidth region (see further discussion in the Functional Description section). Linfinity's architecture also eliminates the output compensation capacitor typical in earlier terminator designs. Each is approved for use with SCSI1,-2,-3, ULTRA and beyond — providing the highest performance alternative available today. Another key improvement of LX5120 products lies in their ability to ensure reliable, errorfree communications even in systems which D A T A S H E E T K E Y F E AT U R E S do not necessarily adhere to recommended SCSI hardware design guidelines, such as the use of improper cable lengths and 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 these problems. The LX5120 architecture is much more tolerant of marginal system integrations. Recognizing the needs of portable and configurable peripherals, the LX5120 has a TTL compatible sleep/disable mode. To enter this mode, the DIS pin must be driven low, thereby disconnecting the LX5120 from the SCSI bus. Quiescent current is less than 150µA in this mode. Reduced component count is also inherent in the LX5120 architecture. Traditional termination techniques require large stabilization and transient protection capacitors of up to 20µF in value and size. The LX5120 architecture does not require these components, allowing all the cost savings associated with inventory, board space, assembly, reliability, and component costs. ■ Ultra-Fast Response For Fast-20 SCSI Applications ■ Split Disconnect For Mixing 16-Bit (Wide) Or 8-Bit (Narrow) Buses ■ 35mhz Channel Bandwidth ■ Sleep-Mode Current Less Than 150µA ■ Hot-Swap Compatible ■ NO External Compensation Capacitors ■ Compatible With Active Negation Drivers ■ Superior Pin-for-Pin Replacement For The UCC5620 NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com. PRODUCT HIGHLIGHT R E C E I V I N G W AV E F O R M - 20MH Z D R I V I N G W AV E F O R M - 20MH Z Receiver Driver 1 Meter, AWG 28 LX5120 LX5120 LX5268 LX5268 PA C K A G E O R D E R I N F O TJ (°C) 0 to 125 SSOP DB Plastic 36-pin NOTE: For An In-Depth Discussion On Applying SCSI, Request Linfinity Application Note: "Understanding The Single-Ended SCSI Bus" LX5120CDB Note: Available in Tape & Reel. Append the letter "T" to part number. (i.e. LX5120CDBT) Copyright © 2000 Rev. 1.0 4/00 LINFINITY MICROELECTRONICS INC. 11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570 1 PRODUCT DATABOOK 1996/1997 UltraMAX LX5120 ULTRA 27-L INE , P LUG P AND D 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 LAY SCSI T ERMINATOR A T A S H E E T PA C K A G E P I N O U T S (Note 1) TermPwr Voltage ..................................................................................................... 7V Continuous Output Voltage Range .............................................................. 0 to 5.5V Continuous Disable Voltage Range .............................................................. 0 to 5.5V Operating Junction Temperature Plastic (DB Package) ..................................................................................... 150ºC Storage Temperature Range ............................................................. -65°C to +150°C Solder Temperature (Soldering, 10 seconds) ................................................... 300°C T19 T20 T1 T2 T3 T4 T5 GND GND GND DIS T6 T7 T8 T9 T10 T21 T22 Note 1. Exceeding these ratings could cause damage to the device. T H E R M A L D ATA DB PACKAGE: THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA 50°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. Symbol Termination Voltage High Level Disable Input Voltage Low Level Disable Input Voltage Operating Virtual Junction Temperature Range LX5120C VTERM VIH VIL 36 2 35 3 34 4 33 5 32 6 31 7 30 8 29 9 28 10 27 11 26 12 25 13 24 14 23 15 22 16 21 17 20 18 19 T27 T26 T25 T18 T17 T16 T15 N.C. GND GND GND VT T14 T13 T12 T11 T24 T23 DB PACKAGE (Top View) 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 1 (Note 2) Recommended Operating Conditions Min. Typ. Max. Units 4.0 2 0 5.5 VTERM 0.8 V V V 0 125 °C 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 2 Symbol Output High Voltage TermPwr Supply Current VOUT ICC Output Current Disable Input Current Output Leakage Current Channel Bandwidth Termination Sink Current, per Channel IOUT IIN BW ISINK Test Conditions Min. 2.65 All data lines = open All data lines = 0.2V DIS (Disable) Pin >2.0V VOUT = 0.2V DIS = 0V DIS > 2.0V, VO = 0.2V -20 LX5120 Typ. Max. 2.85 12 635 10 -23 35 VOUT = 4V 7 20 670 150 -24 -10 1 Units V mA mA µA mA µA µA MHz mA Copyright © 2000 Rev. 1.0 4/00 PRODUCT DATABOOK 1996/1997 UltraMAX LX5120 ULTRA 27-L INE , P LUG P AND R O D U C T I O N P LAY SCSI T ERMINATOR 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) 2.85V DIS 1.4V 1 OF 27 CHANNELS FUNCTIONAL DESCRIPTION Cable transmission theory suggests that in order to optimize reproduces the optimum case when the device is enabled. signal speed and quality, the termination should act both as To enable the device the DIS (Disable) pin should be driven an ideal voltage reference when the line is released (de-asserted) low. During this mode of operation, quiescent current is 20mA and as an ideal current source when (Max.) and the device will respond to the line is active (asserted). Common POWER UP / POWER DOWN FUNCTION TABLE line demands by delivering 24mA on active terminators, which consist of assertion and by imposing 2.85V on deDisable Quiescent Linear Regulators in series with resisassertion. Disable mode places the Outputs tors (typically 110Ω), are a comprodevice in a sleep state, where a meager LX5120 Current mise. As the line voltage increases, 150µA (Max.) of quiescent current is L Enabled 20mA (Max.) the amount of current decreases linconsumed. Additionally, all outputs are H HI Z 150µA (Max.) early by the equation V = I * R. The in a Hi-Z (impedance) state. Sleep Open HI Z 150µA (Max.) UltraMAX LX5120, with its unique new mode can be used for power conserarchitecture, applies the maximum vation or to completely eliminate the amount of current regardless of line terminator from the SCSI chain. voltage until the termination high threshold (2.85V) is reached. An additional feature of the LX5120 is its compatibility with Acting as a near ideal line terminator, the LX5120 closely active negation drivers. 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. Copyright © 2000 Rev. 1.0 4/00 3