LX5250CPW

LX5250/5252 TM ® 9-Line Multimode SCSI Terminator P R OD UCTION DATA SHEET DESCRIPTION The LX5250/52 is a multimode SCSI terminator that is compatible with the SCSI SPI-2 (Ultra2 SCSI), SCSI SPI-3 (Ultra3 SCSI or Ultra160 SCSI), and SCSI SPI-4 (Ultra320) specifications developed by the T10 standards committee for low voltage differential (LVD) termination, while providing backwards compatibility to the SCSI, SCSI-2, and SPI single-ended specifications. Multimode compatibility permits the use of legacy devices on the bus without hardware alterations. Automatic mode selection is achieved through voltage detection on the Diffsense line. The LX5250/52 utilizes an industry standard LVD architecture. The individual high bandwidth drivers maximize channel separation, reduce channel-to-channel noise and cross talk to insure Ultra320 performance. When the LX5250/52 is enabled, the differential sense (DIFFSENSE) pin supplies a voltage between 1.2V and 1.4V. In application this pin is tied to the DIFFSENSE input of the corresponding LVD transceivers. This action enables the LVD transceiver function. DIFFSENSE is capable of supplying a maximum of 10mA. Tying the DIFFSENSE pin high places the LX5250/52 in a HI Z state indicating the presence of an HVD device. Tying the pin low places the part in a single-ended mode while also signaling the multimode transceiver to operate in a single-ended mode. Recognizing the needs of portable and configurable peripherals, the LX5250/52 has a TTL compatible sleep/disable mode. During this sleep/disable mode, power dissipation is reduced to a meager 15uA while also placing all outputs in a HI Z state. Also during sleep/disable mode, the DIFFSENSE function is disabled and is placed in a HI Z state. The LX5250/52 also provides a master / slave function. Driving this pin high or floating the pin enables the 1.3V DIFFSENSE reference. Driving the pin low disables the on board DIFFSENSE reference and enables use of an external master reference device. KEY FEATURES W WW . Microsemi . C OM IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com Compliant with SCSI SPI-2 (Ultra2), SPI-3 (Ultra160), and SPI-4 (Ultra320) Auto-Selectable LVD or SingleEnded Termination Fast Response, No Output Capacitors Required Compatible with Active Negation Drivers 15µA Supply Current in Disconnect Mode Logic Command Disconnects All Termination Lines Diffsense Line Driver Ground Driver Integrated for Single-Ended Operation Current Limit and Thermal Protection Hot-Swap Compatible (SingleEnded) Available in 36-pin QSOP and 28pin TSSOP package LX5250, 36-pin QSOP: Pin Compatible With DS2118, UCC5630A and UCC5672 LX5250 28-pin TSSOP: Pin Compatible with DS2119, and UCC5672 PRODUCT HIGHLIGHT + L X 5250/ L X 5252 + L X 5250/ L X 5252 LX5250/5252 LX5250/5252 PACKAGE ORDER INFO TA (°C) DB QSOP 36-Pin PW TSSOP 28-Pin RoHS Compliant / Pb-free Transition DC: 0535 RoHS Compliant / Pb-free Transition DC: 0518 0 to 70 LX5250CDB LX5252CDB LX5250CPW - Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX5250CDB-TR) Copyright © 2002 Rev. 1.2b, 2005-08-29 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1 LX5250/5252 TM ® 9-Line Multimode SCSI Terminator P R OD UCTION DATA SHEET ABSOLUTE MAXIMUM RATINGS Term Power (VTERM) .........................................................................................-0.3V to 7V Operating Junction Temperature ................................................................................150°C Storage Temperature Range………………………………………………..-65°C to 150°C RoHS / Pb-free Peak Package Solder Reflow Temperature (40 second maximum exposure)................................................................... 260°C (+0, -5) Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of specified terminal. PACKAGE PIN OUT NC NC NC 1+ 12+ 2HEATSINK HEATSINK HEATSINK 3+ 34+ 45+ 5DISCONNECT GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 W WW . Microsemi . C OM THERMAL DATA VTERM HVD LVD SE 99+ 88+ HEATSINK HEATSINK HEATSINK 77+ 66+ DIFFB DIFFSENSE M/Sb DB 36 Pin QSOP 53.9°C/W LX5250/5252 DB PACKAGE (Top View) N/C = Not internally connected THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA PW 28 Pin TSSOP 100°C/W NC 1+ 12+ 2NC 3+ 34+ 45+ 5DISCONNECT GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA 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. θJA can vary significantly depending on mounting technique. (See Application Notes Section: Thermal considerations) MASTER/SLAVE FUNCTION TABLE Master/Slave L* H Open (Pull-Up) HI Z 1.3V 1.3V VTERM NC 99+ 88+ NC 77+ 66+ DIFFB DIFFSENSE M/Sb LX5250 ONLY PW PACKAGE (Top View) DIFFSENSE Status N/C = Not internally connected 0mA 10mA Source 10mA Source RoHS / Pb-free 100% Matte Tin Lead Finish * When in Low state, terminator will sense state of DIFFSENSE line. DIFFSENSE/POWER UP/POWER DOWN FUNCTION TABLE LX5252 LX5250 DISCONNECT DISCONNECT L L L H or Open H H H L or Open PACKAGE DATA PACKAGE DATA DIFFSENSE < 0.5V 0.7V – 1.9V > 2.4V X Outputs Status Enable Enable Disable Disable Type SE LVD HI-Z HI-Z Quiescent Current 55mA 35mA 8mA 10µA Copyright © 2002 Rev. 1.2b, 2005-08-29 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 2 LX5250/5252 TM ® 9-Line Multimode SCSI Terminator P R OD UCTION DATA SHEET RECOMMENDED MAX OPERATING CONDITIONS W WW . Microsemi . C OM Parameter LVD SE Signal Line Voltage VTerm Disconnect Input Voltage Operating Junction Temperature Symbol VTERM Min 2.9 3.5 0 0 0 LX5250/52 Typ Max 5.25 5.25 5.0 VTERM 125 Units V V V °C TJ Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C ≤ TA ≤ 70°C, VTerm = 4.75V. For the LX5250, DISCONNECT = L; for the LX5252, DISCONNECT = H. LX5250/52 Parameter Symbol Test Conditions Units Min Typ Max LVD Terminator Section All term lines open VTerm Supply Current Common Mode Voltage Offset Voltage Differential Terminator Impedance Common Mode Impedance Output Capacitance (Note 1) LVDICC VCM VOS ZO ZCM CO Open circuit between (-) and (+) terminals VOUT Differential = -1V to +1V 0.5V to 2V LX5250: DISCONNECT > 2.0V; LX5252: DISCONNECT < 0.8V LX5250: DISCONNECT > 2.0V; LX5252: DISCONNECT < 0.8V 1.125 100 100 110 35 15 1.25 112 105 150 45 35 1.375 125 110 195 3 mA µA V mV Ω Ω pF ELECTRICAL CHARACTERISTICS Mode Change Delay Diffsense Section tDF VDIFF IDIFF ISINK(DIFF) Diffsense = 1.4V to 0V 100 1.2 115 1.3 300 1.4 15 200 ms V mA µA mA mA µA V mA mA Diffsense Output Voltage Diffsense Output Source Current Diffsense Sink Current Single Ended Section VDIFF = 0V VDIFF = 2.75V All tem lines = Open, Master/Slave = 0V All tem lines = 0.2V, Master/Slave = 0V LX5250: DISCONNECT > 2.0V; LX5252: DISCONNECT < 0.8V 5 20 55 250 15 2.5 2.85 22.5 65 VTerm Supply Current Termination Output High Voltage Output Current Sink Current Output Capacitance (Note 1) SEICC VO IO ISINK CO IDDQ 75 290 35 3.1 24 3 2 VOUT = 0.2V VOUT = 4V, All lines DISC > 2.0V LX5250: DISCONNECT > 2.0V; LX5252: DISCONNECT < 0.8V, VLINE = 0 to 4V, TA = 25° LX5250: DISCONNECT > 2.0V; LX5252: DISCONNECT < 0.8V, VTERM = Open, VLINE = 2.7V, TA = 25° I = 1mA 18.5 40 ELECTRICALS ELECTRICALS pF µA Output Leakage IHP Ground Driver Impedance ZG 1 100 µA Ω Copyright © 2002 Rev. 1.2b, 2005-08-29 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 3 LX5250/5252 TM ® 9-Line Multimode SCSI Terminator P R OD UCTION DATA SHEET Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C ≤ TA ≤ 70°C, VTerm = 4.75V. For the LX5250, DISCONNECT = L; for the LX5252, DISCONNECT = H. LX5250/52 Parameter Symbol Test Conditions Units Min Typ Max DISCONNECT Section ELECTRICAL CHARACTERISTICS W WW . Microsemi . C OM Disconnect Thresholds VTH IIL LX5250: DISCONNECT = 0V; LX5252: DISCONNECT = 2.4V LX5250: DISCONNECT = 2.4V; LX5252: DISCONNECT = 0V 0.8 2.0 10 100 V µA nA Input Current IIH MASTER/SLAVE Section Master/Slave Thresholds Input Current Note 1: Guaranteed by design. VTH(MS) IIL(MS) IIH(MS) Master/Slave = 0V Master/Slave = 2.4V 0.8 100 2.0 10 V µA nA BLOCK DIAGRAM VTERM 36 1.07 mA 1 of 9 Terminator Pairs SE LVD HVD 52.5 SE LVD 150 HVD 52.5 22.4mA I-Limited 2.7V Source LVD(-) /SE 5 DISCONNECT 17 DISC 4 LVD(+) /SE (Pseudo-GND) 1.25V 10mA I-Limited 1.3V Source 20 M/S 19 1.07 mA 18 GND SE DIFSENSE 20 20K Window Comp. HVD LVD POWER ON & MODE DELAY ELECTRICALS ELECTRICALS DIFFB DISC 21 33 LATCH SE HVD LVD 35 34 Figure 1 – LX5250/52 Block Diagram; 36-pin version shown Copyright © 2002 Rev. 1.2b, 2005-08-29 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 4 LX5250/5252 TM ® 9-Line Multimode SCSI Terminator P R OD UCTION DATA SHEET FUNCTIONAL PIN DESCRIPTION W WW . Microsemi . C OM PIN NAME 1-, 2-, 3-, 4-, 5-, 6-, 7-, 8-, 9- DESCRIPTION Negative signal termination lines for LVD mode. Signal termination lines for SE mode. 1+, 2+, 3+, 4+, 5+, 6+, 7+, 8+, 9+ Positive signal termination lines for LVD mode. Psuedo-ground lines for SE mode. Power supply pin for terminator. Connect to SCSI bus VTERM. Must be decoupled by one 4.7µF low-ESR capacitor for every three terminator devices. It is VTERM absolutely necessary to connect this pin to the decoupling capacitor through a very low impedance (big traces to PCB). Keeping distances very short from the decoupling capacitors is somewhat layout dependent and some applications may benefit from high frequency decoupling with 0.1µF capacitors at VTERM pin. DISCONNECT Enables/Disables terminator. See Power Down Function Table for logic levels for LX5250 and LX5252. Terminator ground pin. Connect to ground. Sometimes referred to as M/S pin in this datasheet. Used to select which terminator is the controlling device. M/S pin High or Open enables the DIFFSENSE output drive. Please see MASTER/SLAVE Function Table. This is a dual function pin. It drives the SCSI bus DIFFSENS line. It is also the sense pin to detect the SCSI bus mode (LVD, SE, or HVD). DIFFSENSE output drive can be disabled with low level on the M/S pin. Please see DIFFSENSE and MASTER/SLAVE Function Tables. Internally connected to DIFFB pin through a 20K Ω resistor. Internally connected to DIFFSENSE pin through a 20K Ω resistor. It can be used as a mode sense pin when the device is non-controlling terminator (M/S is low). An RC filter (50K Ω resistor & 4.7µF) is not required on the LX5250 as it has an internal timer. Single-Ended output; when High, terminator is operating in SE mode. GND MASTER/SLAVE DIFFSENSE DIFFB SE LVD Low Voltage Differential output; when High, terminator is operating in LVD mode. PACKAGE DATA PACKAGE DATA HVD High Voltage Differential output; when High, terminator is operating in HVD mode. Attached to die mounting pad, but not bonded to GND pin. Pins should be considered a heat sink only, and not a true ground connection. It is recommended that these pins be connected to ground, but can be left floating. HEATSINK Copyright © 2002 Rev. 1.2b, 2005-08-29 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 5 LX5250/5252 TM ® 9-Line Multimode SCSI Terminator P R OD UCTION DATA SHEET APPLICATION SCHEMATIC W WW . Microsemi . C OM HOST TERMPOWER VTERM 11+ Data Lines (9) 99+ PERIPHERAL 11+ 99+ VTERM TERMPOWER DISCONNECT LX5250/52 DISC GND LX5250/52 DISC GND DISCONNECT NC* 4.7uF 4.7uF DIFFSENS DIFFB Pin 1 DIFFSENS DIFFB 50k 50k 4.7uF Pin 1 NC* 4.7uF 4.7uF 4.7uF VTERM 11+ Data Lines (9) 99+ 11+ 99+ VTERM LX5250/52 DISC GND LX5250/52 DISC GND DIFFSENS NC* 4.7uF Pin 1 DIFFB DIFFSENS DIFFB Pin 1 NC* 4.7uF VTERM 11+ Control Lines (9) 99+ 11+ 99+ VTERM LX5250/52 DISC GND LX5250/52 DISC APPLICATIONS GND DIFFSENS DIFFSENS DIFFB Pin 1 NC* 4.7uF Pin 1 DIFFB NC* 4.7uF *The capacitor on pin 1 can be placed on the LX5250CDB, LX5250CPW, or LX5252CDB to be pin-compatible with other devices, but is not required. Figure 2 – Application Diagram Copyright © 2002 Rev. 1.2b, 2005-08-29 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 6 LX5250/5252 TM ® 9-Line Multimode SCSI Terminator P R OD UCTION DATA SHEET MECHANICAL DRAWINGS W WW . Microsemi . C OM DB 36 36-Pin Quarter Size Outline Package (QSOP) Dim 19 EP 1 18 B D H F E AM G L C A B C D E F G H L M P *LC MILLIMETERS MIN MAX 2.14 2.54 0.29 0.51 0.23 0.32 15.20 15.40 7.40 7.60 0.80 BSC 0.10 0.30 2.44 2.64 0.51 1.01 0° 8° 10.11 10.51 0.10 − INCHES MIN MAX 0.084 0.100 0.011 0.020 0.009 0.0125 0.598 0.606 0.291 0.299 0.031 BSC 0.004 0.012 0.096 0.104 0.020 0.040 0° 8° 0.398 0.004 0.004 − *Lead Coplanarity PW 28-Pin Thin Small Shrink Outline (TSSOP) Dim 321 E P F D AH SEATING PLANE B G L C M A B C D E F G H L M P *LC Note: MILLIMETERS MIN MAX 0.85 0.95 0.19 0.30 0.09 0.20 9.60 9.80 4.30 4.50 0.65 BSC 0.05 0.15 – 1.10 0.50 0.75 0° 8° 6.25 6.50 – 0.10 INCHES MIN MAX 0.033 0.037 0.007 0.012 0.003 0.008 0.378 0.390 0.169 .176 0.025 BSC 0.002 0.005 – 0.043 0.020 0.030 0° 8° 0.246 0.256 – 0.004 MECHANICALS MECHANICALS 1. Dimensions do not include mold flash or protrusions; these shall not exceed 0.155mm(.006”) on any side. Lead dimension shall not include solder coverage. Copyright © 2002 Rev. 1.2b, 2005-08-29 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 7 LX5250/5252 TM ® 9-Line Multimode SCSI Terminator P R OD UCTION DATA SHEET NOTES W WW . Microsemi . C OM N NOTES PRODUCTION DATA – Information contained in this document is proprietary to Microsemi and is current as of publication date. This document may not be modified in any way without the express written consent of Microsemi. Product processing does not necessarily include testing of all parameters. Microsemi reserves the right to change the configuration and performance of the product and to discontinue product at any time. Copyright © 2002 Rev. 1.2b, 2005-08-29 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 8