UCC5606PWPTR

 SLUS347A – MAY 1995 – REVISED APRIL 2003               FEATURES D Complies with SCSI, SCSI–2 and SPI–2 D D D D D D D D D D DESCRIPTION Standards 2.7-V to 5.25-V Operation 1.8-pF Channel Capacitance during Disconnect 0.5-µA Supply Current in Disconnect Mode 110-Ω/2.5-kΩ Programmable Termination Completely Meets SCSI Hot Plugging –400-mA Sourcing Current for Termination +400-mA Sinking Current for Active Negation Drivers Trimmed Termination Current to 4% Trimmed Impedance to 7% Current Limit and Thermal Shutdown Protection The UCC5606 provides 9 lines of active termination for a small computer systems interface (SCSI) parallel bus. The SCSI standard recommends active termination at both ends of the cable segment. The UCC5606 is ideal for high performance 3.3-V SCSI systems. The key features contributing to such low operating voltage are the 0.1-V drop out regulator and the 2.7-V reference. During disconnect the supply current is typically only 0.5 µA, which makes the device attractive for battery powered systems. The UCC5606 is designed with an ultra-low channel capacitance of 1.8 pF, which eliminates effects on signal integrity from disconnected terminators at interim points on the bus. BLOCK DIAGRAM UDG–94067–1 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Copyright  2003, Texas Instruments Incorporated 
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 SLUS347A – MAY 1995 – REVISED APRIL 2003 DESCRIPTION (CONTINUED) The UCC5606 can be programmed for either a 110-Ω or 2.5-kΩ termination. The 110-Ω termination is used for standard SCSI bus lengths and the 2.5-kΩ termination is typically used in short bus applications. When driving the TTL compatible DISCNCT pin directly, the 110-Ω termination is connected when the DISCNCT pin is driven high, and disconnected when low. When the DISCNCT pin is driven through an impedance between 80 kΩ and 150 kΩ, the 2.5-kΩ termination is connected when the DISCNCT pin is driven high, and disconnected when driven low. The power amplifier output stage allows the UCC5606 to source full termination current and sink active negation current when all termination lines are actively negated. The UCC5606 is pin-for-pin compatible with Unitrode’s other 9-line single-ended SCSI terminators, except that DISCNCT is now active low, allowing lower capacitance and lower voltage upgrades to existing systems. The UCC5606 is completely hot pluggable and appears as high impedance at the terminating channels with VTRMPWR = 0 V or open. Internal circuit trimming is utilized, first to trim the 110-Ω termination impedance to a 7% tolerance, and then most importantly, to trim the output current to a 4% tolerance, as close to the maximum SCSI specification as possible, which maximizes noise margin in fast SCSI operation. Other features include thermal shutdown and current limit. This device is offered in low thermal resistance versions of the industry standard 16-pin narrow body SOIC, 16-pin N and 24-pin TSSOP. ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range unless otherwise noted{} UCC5606 TRMPWR voltage 7 Signal line voltage 0 to 7 Regulator output current UNIT V 0.6 A Storage temperature, Tstg –65 to 150 Operating junction temperature, TJ –55 to 150 °C C Lead temperature (soldering, 10 sec.) 300 † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. All voltages are with respect to GND. Currents are positive into and negative out of, the specified terminal. ‡ Currents are positive into, negative out of the specified terminal. Consult Packaging Section of Databook for thermal limitations and considerations of packages. All voltages are referenced to GND. RECOMMENDED OPERATING CONDITIONS MAX UNIT TRMPWR voltage 2.7 MIN NOM 5.25 V Signal line voltage 0 5 V Disconnect input voltage 0 TRMPWR °C ORDERING INFORMATION TA 0°C to 70°C DISCONNECT STATUS PACKAGED DEVICE{ DIL–16 (N) SOIC–16 (DP) UCC5606N UCC5606DP TSSOP–24 (PWP) UCC5606PWP † The LQFP packages are available taped and reeled. Add TR suffix to device type (e.g. UCC5606PWPTR) to order quantities of 2,500 devices per reel. 2 www.ti.com 
 SLUS347A – MAY 1995 – REVISED APRIL 2003 CONNECTION DIAGRAM DIL–16 (Top View) N Package SOIC–16 (Top View) DP Package TSSOP–24 (Top View) PWP Package NOTE: GND* serves as a heat sink ground which must be tied to a large copper area or the grounding plate. ELECTRICAL CHARACTERISTICS TA = 0°C to 70°C, TRMPWR = 3.3 V, DISCNCT = 3.3 V, RDISCNCT = 0 Ω, TA = TJ, (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Supply Current Section Termpwr supply current Power down mode All termination lines = open 1 2 All termination lines = 0.2 V 210 218 DISCNCT = 0 V 0.5 5.0 102.3 110.0 117.7 2.5 2.7 3.0 –22.1 –23.0 –24.0 –21 –23 –24 –20.2 –23.0 –24.0 –19 –23 mA µA Output Section (110 ohms – Terminator Lines) Terminator impedance Output high voltage Max output current TRMPWR = 3 V (1) VLINE = 0.2 V, VLINE = 0.2 V TJ = 25°C VLINE = 0.2 V, TJ = 25°C (1) VLINE = 0.2 V, TRMPWR = 3 V, Output leakage VLINE = 0.5 V DISCNCT = 0 V, Output capacitance DISCNCT = 0 V, TRMPWR = 3 V (1) Ohms V mA –24 –22.4 TRMPWR = 0 V to 5.25 V DP package (2) 10 400 nA 1.8 2.5 pF 2.0 2.5 3.0 kΩ 2.5 2.7 3.0 V –0.7 –1.0 –1.4 –0.6 –1.0 –1.5 10 400 nA 1.8 2.5 pF Output Section (2.5 kΩ – Terminator Lines) (RDISCNCT = 80 kΩ) Terminator impedance Output high voltage TRMPWR = 3 V (1) Max output current VLINE = 0.2 V VLINE = 0.2 V, Output leakage DISCNCT = 0 V, Output capacitance DISCNCT = 0 V, TRMPWR = 3 V (1) TRMPWR = 0 to 5.25 V DP package (2) www.ti.com mA 3 
 SLUS347A – MAY 1995 – REVISED APRIL 2003 ELECTRICAL CHARACTERISTICS TA = 0°C to 70°C, TRMPWR = 3.3 V, DISCNCT = 3.3 V, RDISCNCT = 0 Ω, TA = TJ, (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Regulator Section Regulator output voltage 5.25 V > TRMPWR > 3 V Drop-out voltage All termination lines = 0.2 V Short circuit current Thermal shutdown VREG = 0 V VREG = 3 V (2) Thermal shutdown hysteresis (2) Sinking current capability 2.5 2.7 3.0 0.1 0.2 –200 –400 –800 200 400 800 V mA °C 170 10 Disconnect Section Disconnect threshold RDISCNCT = 0 kΩ to 80 kΩ Input current DISCNCT = 3.3 V 0.8 1.5 2.0 V 30 50 µA NOTES: 1. Measuring each termination line while other eight are low (0.2 V). 2. Ensured by design. Not production tested. TERMINAL FUNCTIONS TERMINAL DESCRIPTION NO. DISCNCT 7 GND 9 LINE1 TO LINE9 4 I 110-Ω termination channels REG 9 I Output of the internal 2.7-V regulator TRMPWR 4 GND* 4 I/O NAME I Taking this pin low causes the 9 channels to become high impedance and the chip to go into low power mode. In short laptop buses an 80-kΩ to 150-kΩ resister to TERPWR terminates the bus at 2.5 kΩ. Less than 110 Ω to TERPWR enables the terminator. Ground reference for the device Power for the device Heat sink ground, must be tied to a large copper area or the grounding plate. www.ti.com 
 SLUS347A – MAY 1995 – REVISED APRIL 2003 APPLICATION INFORMATION UDG–98100 Figure 1. Typical SCSI Bus Configurations Utilizing two UCC5606 Devices UDG–98100 Figure 2. Typical Wide SCSI Bus Configurations Utilizing three UCC5606 Devices www.ti.com 5 PACKAGE OPTION ADDENDUM www.ti.com 10-Dec-2020 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) (3) Device Marking (4/5) (6) UCC5606PWPTR ACTIVE TSSOP PW 24 2000 RoHS & Green NIPDAU Level-2-260C-1 YEAR 0 to 70 UCC5606PWP (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of