UCC5630
Low Voltage Differential (LVD/SE) SCSI 9 Line Terminator
FEATURES
∙Auto Selection Multi-Mode Single Ended or Low Voltage Differential Termination
∙2.7V to 5.25V Operation
∙Differential Failsafe Bias
∙Thermal Packaging for Low Junction Temperature and Better MTBF
∙Master/Slave Inputs
∙Supports Active Negation
∙Standby (Disable Mode) 5μA
∙3pF Channel Capacitance
DESCRIPTION
The UCC5630 Multi-Mode Low Voltage Differential and Single Ended Terminator is both a single ended terminator and a low voltage differential terminator for the transition to the next generation SCSI Parallel Interface (SPI-2). The low voltage differential is a requirement for the higher speeds at a reasonable cost and is the only way to have adequate skew budgets. The transceivers can be incorporated into the controller, unlike SCSI high power differential (EIA485) which requires external transceivers. Low Voltage differential is specified for Fast-40 and Fast-80, but has the potential of speeds up to Fast-320. The UCC5630 is SPI-2, SPI and Fast-20 compliant. Consult SSOP-36 and LQFP-48 Package Diagram for exact dimensions.
The UCC5630 can not be used with SCSI high voltage differential (HVD) EIA485. It will shut down when it sees high power differential to protect the bus. The pinning for high power differential is not the same as LVD or single ended and the bias voltage, current and power are also different for EIA485 differential.
BLOCK DIAGRAM
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SOURCE ONLY FROM TRMPWR AND THE ENABLED TERMINATORS |
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SOURCE 5 < 15mA |
OPEN CIRCUIT ON POWER OFF |
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TRMPWR |
36 |
SINK 200μA MAXIMUM (NOISE LOAD) |
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+VDD |
OPEN CIRCUIT IN A DISABLED |
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TERMINATOR MODE |
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REEF 1.3V |
20 |
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MSTR/SLV |
19 |
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1.3V ± –0.1V |
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DIFFSENS |
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2.2 > 1.9V |
35 |
HIPD |
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20k |
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DIFFB |
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21 |
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34 |
LVD |
0.1μF |
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0.7 > 0.6V |
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SE |
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LOW |
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SOURCE/SINK |
110 |
FREQUENCY |
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FILTER |
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REGULATOR |
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50Hz – 60Hz |
REF 2.7V |
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125 +50mV TO +62.5mV |
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REF 1.25V |
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52 |
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5 L1– |
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HS/GND |
8 |
HIGH IMPEDANCE |
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RECEIVER EVEN |
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HS/GND |
9 |
WITH POWER OFF |
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HS/GND |
10 |
110 |
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HS/GND |
26 |
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HS/GND |
27 |
125 |
+50mV TO +62.5mV |
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HS/GND |
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GND |
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SWITCHES UP ARE SINGLE |
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DISCNCT |
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ENDED SWITCHES DOWN ARE |
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LOW VOLTAGE DIFFERENTIAL |
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REG |
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1 |
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4.7μF |
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52
4 L1+
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32 L9–
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31 L9+
SE GND
SWITCH
MWP 36 PINOUT
Circuit Design Patented
01/99
UDG-98049
UCC5630
ABSOLUTE MAXIMUM RATINGS |
CONNECTION DIAGRAM |
TRMPWR Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V |
SSOP-36 (Top View) |
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Signal Line Voltage |
. . . . . . . . . . . . . . . . . . . . . 0V to TRMPWR |
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MWP Package |
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Package Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . 2W |
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Storage Temperature . . . . . . . . . . . . . . . . . . . –65°C to +150°C |
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Junction Temperature. . . . . . . . . . . . . . . . . . . –55°C to +150°C |
REG |
1 |
36 |
TRMPWR |
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Lead Temperature (Soldering, 10sec.) . . . . . . . . . . . . . +300°C |
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All voltages are with respect to PIN1. Currents are positive into, |
N/C |
2 |
35 |
HIPD |
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negative out of the specified terminal. Consult Packaging Sec- |
N/C |
3 |
34 |
LVD |
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tion of the Databook for thermal limitations and considerations |
L1+ |
4 |
33 |
SE |
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of packages. |
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L1– |
5 |
32 |
L9– |
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LQFP-48 (Top View) |
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L2+ |
6 |
31 |
L9+ |
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FQP Package |
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L2– |
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30 |
L8– |
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HS/GND |
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HS GND |
HS/GND |
8 |
29 |
L8+ |
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HS/GND |
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HS GND |
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L6+ |
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N/C |
HS/GND |
9 |
28 |
HS/GND |
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L6– |
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DIFFB |
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L7+ |
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DIFSENS |
HS/GND |
10 |
27 |
HS/GND |
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L7– |
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MSTR/SLV |
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12 |
11 |
10 |
9 |
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5 |
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2 |
1 |
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L3+ |
11 |
26 |
HS/GND |
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L8+ |
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13 |
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GND |
L3– |
12 |
25 |
L7– |
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L8– |
14 |
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DISCNCT |
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L9+ |
15 |
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46 |
L5– |
L4+ |
13 |
24 |
L7+ |
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L9– |
16 |
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45 |
L5+ |
L4– |
14 |
23 |
L6– |
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HS/GND |
17 |
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44 |
HS/GND |
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HS/GND |
18 |
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43 |
HS/GND |
L5+ |
15 |
22 |
L6+ |
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HS/GND |
19 |
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42 |
HS/GND |
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L5– |
16 |
21 |
DIFF B |
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SE |
20 |
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41 |
L4– |
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LVD |
21 |
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40 |
L4+ |
DISCNCT |
17 |
20 |
DIFSENS |
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HIPD |
22 |
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39 |
L3– |
GND |
18 |
19 |
MSTR/SLV |
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TERMPWR |
23 |
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38 |
L3+ |
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NC |
24 |
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37 |
NC |
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25 |
26 |
27 |
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30 |
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32 |
33 |
34 |
35 |
36 |
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NC |
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L2– |
RECOMMENDED OPERATING CONDITIONS |
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TRMPWR Voltage . . . . . . . . . . . . . . . . . . . . . . . 2.7V TO 5.25V |
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REG |
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L2+ |
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NC |
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L1– |
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NC |
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L1+ |
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HS/GND |
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HS/GND |
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HS/GND |
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HS/GND |
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ELECTRICAL CHARACTERISTICS: Unless otherwise specified, TA = 0°C to 70°C, TRMPWR = 3.3V.
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PARAMETER |
TEST CONDITIONS |
MIN |
TYP |
MAX |
UNITS |
TRMPWR Supply Current Section |
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TRMPWR Supply Current |
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20 |
mA |
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Disable Terminator, in DISCNCT mode. |
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35 |
μA |
Regulator Section |
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1.25V |
Regulator |
LVD Mode |
1.15 |
1.25 |
1.35 |
V |
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1.25V |
Regulator Source Current |
LVD Mode, Differential Sense Floating |
–80 |
–100 |
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mA |
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1.25V |
Regulator Sink Current |
LVD Mode, Differential Sense Floating |
80 |
100 |
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mA |
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1.3V |
Regulator |
DIFSENS |
1.2 |
1.3 |
1.4 |
V |
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1.3V |
Regulator Source Current |
DIFSENS |
–5 |
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–15 |
mA |
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1.3V |
Regulator Sink Current |
DIFSENS |
50 |
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200 |
μA |
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2
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