UCC5629_08 Datasheet, PDF (6/12 Pages) Texas Instruments – MULTIMODE SCSI 14 LINE TERMINATOR

UCC5629
SLUS444A – NOVEMBER 1999 – REVISED MARCH 2003
TYPICAL APPLICATION DIAGRAM
L1+
L1–
TRMPWR
3 TRMPWR
L9+
L9–
CONTROL LINES
9 BITS
L1+
L1–
TRMPWR 3
TRMPWR
L9+
L9–
4.7 µF
L10+
L10–
36 _DISCNCT
25 GND
REG
10
L13+
L13–
DIFFSENS 35
DIFFB
34
4.7 µF
4.7 µF
4 BITS OF THE HIGH BYTE
50 kΩ
220 kΩ
50 kΩ
L10+
L10–
L13+
L13–
DISCNCT ³⁶
35 DIFFSENS
GND 25
DIFFB
34
REG
10
4.7 µF
4.7 µF
L1+
L1–
DATA LINES (15)
L9+
L9–
3 TRMPWR
L10+
L10–
36 _DISCNCT
25 GND
REG
10
L14+
L14–
NC 35
DIFFB
34
4.7 µF
LOW BYTE 8 BITS
PLUS PARITY
HIGH BYTE 4 BITS
PLUS PARITY
L1+
L1–
DATA LINES (15)
L9+
L9–
L10+
L10–
TRMPWR 3
L14+
L14–
35 NC
DIFFB
34
DISCNCT ³⁶
GND 25
REG
10
4.7 µF
4.7 µF
SCSI CONTROLLER
DIFFSENS
UDG–99157
NOTES: 1. A 220-kΩ resistor is added to ground to insure the transceivers will come up in single-ended mode when no terminator is enabled.
The controller DIFFSENS ties to the DIFFB pin on the terminators, only one RC network should be on a device.
2. SPI–2 uses a 20-kΩ resistor between DIFFSENS and DIFFB with a 0.1-µF capacitor to ground. SPI–3 and SPI–4 uses a 50-kΩ
resistor with a 4.7-µF capacitor.
6
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