UCC5510 Datasheet, PDF (1/4 Pages) Texas Instruments – Low Voltage Differential LVD/SE SCSI 9 Line Terminator

UCC5510
Low Voltage Differential (LVD/SE) SCSI 9 Line Terminator
FEATURES
• Auto Selection Multi-Mode Single
Ended or Low Voltage Differential
Termination
• 3.0V to 5.25V Operation
• Differential Failsafe Bias
• Thermal Packaging for Low Junction
Temperature and Better MTBF
• Master/Slave Inputs
• Supports Active Negation
• 3pF Channel Capacitance
DESCRIPTION
The UCC5510 Multi-Mode Low Voltage Differential and Single Ended
Terminator is specially designed for automatic termination of Single-
Ended or Low Voltage Differential SCSI Bus. The Multi-Mode operation of
this device allows for a transition system design for the next generation
SCSI Parallel Interface (SPI-2). Compliant with SPI-2, with SPI and Fast-
20 the UCC5510 incorporates all the functions necessary to properly ter-
minate the SCSI Bus and has internal thermal shut down and short cir-
cuit limiting.
BLOCK DIAGRAM
TRMPWR 38
MSTR/SLV 19
DIFFB 21
+VDD
2.2 > 1.9V
0.7 > 0.6V
REF 2.7V
REF 1.25V
HS/GND 8
HS/GND 28
HS/GND 27
HS/GND 26
HS/GND 10
HS/GND 9
GND 18
Circuit Design Patented
SLUS332A - OCTOBER 1999
SOURCE 5 < 15mA
SINK 200µA MAXIMUM (NOISE LOAD)
REF 1.3V
1.3V ± –0.1V
DEVICE MODE
SELECT LOGIC
110
125 +50mV TO +62.5mV
52
52
110
125 +50mV TO +62.5mV
52
1
REG
SWITCHES UP ARE SINGLE
ENDED SWITCHES DOWN ARE
LOW VOLTAGE DIFFERENTIAL
52
SE GND
SWITCH
20 DIFFSENS
5 L1–
4 L1+
32 L9–
31 L9+
UDG-98033