UCC5606DPTRG4

UCC5606DPTRG4

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UCC5606DPTRG4
IC SCSI 9-LINE TERM 16-SOIC
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$0.40

Quantity Available: 2126
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Texas Instruments

Texas Instruments

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UCC5606DPTRG4 FEATURES

UCC5606DPTRG4 DESCRIPTION

The UCC5606 provides 9 lines of active termination fora small computer systems interface (SCSI) parallel bus.The SCSI standard recommends active termination atboth ends of the cable segment.The UCC5606 is ideal for high performance 3.3-V SCSIsystems. The key features contributing to such lowoperating voltage are the 0.1-V drop out regulator andthe 2.7-V reference. During disconnect the supplycurrent is typically only 0.5 µA, which makes the deviceattractive for battery powered systems.The UCC5606 is designed with an ultra-low channelcapacitance of 1.8 pF, which eliminates effects on signalintegrity from disconnected terminators at interim pointson the bus.

UCC5606DPTRG4 DESCRIPTION (CONTINUED)

The UCC5606 can be programmed for either a 110-Ω or 2.5-kΩ termination. The 110-Ω termination is used forstandard SCSI bus lengths and the 2.5-kΩ termination is typically used in short bus applications. When drivingthe TTL compatible DISCNCT pin directly, the 110-Ω termination is connected when the DISCNCT pin is drivenhigh, and disconnected when low. When the DISCNCT pin is driven through an impedance between 80 kΩ and150 kΩ, the 2.5-kΩ termination is connected when the DISCNCT pin is driven high, and disconnected whendriven low.The power amplifier output stage allows the UCC5606 to source full termination current and sink active negationcurrent 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 thatDISCNCT is now active low, allowing lower capacitance and lower voltage upgrades to existing systems. TheUCC5606 is completely hot pluggable and appears as high impedance at the terminating channels withVTRMPWR = 0 V or open.Internal circuit trimming is utilized, first to trim the 110-Ω termination impedance to a 7% tolerance, and then mostimportantly, 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.

Product Attributes

TYPE DESCRIPTION Select all
Package Tape & Reel (TR)
Series -
Supplier Device Package 16-SOIC
Package / Case 16-SOIC (0.154", 3.90mm Width)
Mounting Type Surface Mount
Operating Temperature 0°C ~ 70°C
Voltage - Supply 2.7V ~ 5.25V
Number of Terminations 9
Type SCSI
Product Status Obsolete

$0.40

Quantity Available: 2126
SZC Quality Assurance
Texas Instruments

Texas Instruments

Texas Instruments Incorporated (TI) is a global semiconductor powerhouse, crafts advanced analog ICs and embedded processors. Fueled by top-tier minds, TI's innovations drive tech's future, impacting 100,000+ clients.

View All Product from Texas Instruments
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