Texas Instruments UCC5630AMWP, UCC5630AFQPTR, UCC5630AFQP, UCC5630AMWPTR Datasheet
Multimode SCSI 9 Line Terminator
UCC5630A
FEATURES
Auto Selection Single Ended (SE) or
•
Low Voltage Differential (LVD)
Termination
Meets SCSI-1, SCSI-2, SCSI-3, SPI,
•
Ultra (Fast-20), Ultra2 (SPI-2 LVD)
and Ultra3 Standards
2.7V to 5.25V Operation
•
Differential Failsafe Bias
•
Thermal packaging for low junction
•
temperature and better MTBF
Master/Slave Input
•
Supports Active Negation
•
3pF Channel Capacitance
•
BLOCK DIAGRAM
DESCRIPTION
The UCC5630A Multimode SCSI Terminator provides a smooth transition
into the next generation of the SCSI Parallel Interface (SPI-2). It automati
cally senses the bus, via DIFFB, and switches the termination to either sin
gle ended (SE) or low voltage differential (LVD) SCSI, dependent on which
type of devices are connected to the bus.The UCC5630A can not be used
on a HVD, EIA485, differential SCSI bus. If the UCC5630A detects a HVD
SCSI device, it switches to a high impedance state.
The Multimode terminator contains all functions required to terminate and
auto detect and switch modes for SPI-2 bus architectures. Single Ended
and Differential impedances and currents are trimmed for maximum effec
tiveness. Fail Safe biasing is provided to insure signal integrity. Device/Bus
type detection circuitry is integrated into the terminator to provide automatic
switching of termination between single ended and LVD SCSI and a high
impedance for HVD SCSI. The multimode function provides all the perfor
mance analog functions necessary to implement SPI-2 termination in a sin
gle monolithic device.
The UCC5630A is offered in a 36 pin SSOP package, as well as a 48 pin
LQFP package for a temperature range of 0°C to 70°C.
-
-
-
-
-
MSTR/SLV
DISCNCT
HIPD34LVD33SE
35
2.15V
21DIFFB
0.6V
19
SE REF 2.7V
LVD REF 1.25V
10µA
17
36TRMPWR
18
GND
ENABLE
SWITCHES
9
8
10 2726 28
HS/GND
SOURCE/SINK REGULATOR
MODE
SE
LVD
HIPD
DISCNCT
ALL
SWITCHES
UP
DOWN
OPEN
OPEN
1
REG
HIPD
LVD
SE
110
124
110
124
(NOISE LOAD)
REF 1.3V
56mV
–+
56mV
+–
SE GND SWITCH
56mV
–+
56mV
+–
SE GND SWITCH
1.3V
–15mA ≤ I
50µA ≤ I
SINK
PATENTED CIRCUIT DESIGN
SOURCE
≤ 200µA
52.5
52.5
52.5
52.5
≤ –5mA
20 DIFSENS
L1–
5
L1+
4
32
L9–
31
L9+
Note: Indicated pinout is for 36 pin SSOP package.
SLUS322A - SEPTEMBER 1999
UDG-98192
UCC5630A
ABSOLUTE MAXIMUM RATINGS
TRMPWR Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V
Signal Line Voltage . . . . . . . . . . . . . . . . . . . . . 0V to TRMPWR
Package Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . 2W
Storage Temperature . . . . . . . . . . . . . . . . . . . –65°C to +150°C
Junction Temperature. . . . . . . . . . . . . . . . . . . –55°C to +150°C
Lead Temperature (Soldering, 10sec.) . . . . . . . . . . . . . +300°C
All voltages are with respect to pin 18. Currents are positive
into, negative out of the specified terminal. Consult Packaging
Section of the Databook for thermal limitations and consider
ations of packages.
RECOMMENDED OPERATING CONDITIONS
TRMPWR Voltage . . . . . . . . . . . . . . . . . . . . . . . . 2.7V to 5.25V
LQFP-48 (Top View)
FQP Package
HS/GND
HS/GND
L5+
L5–
DISCNCT
GND
MSTR/SLV
DIFSENS
DIFFB
HS/GND
HS/GND
HS/GND
HS/GND
N/C
L6+
L6–
L7+
L7–
48
46
47
1
2
3
4
5
6
7
8
9
10
11
12
13
45
15
14
16
424140
44
43
192021
17
18
393837
23
22
24
HS/GND
L4–
L4+
L3–
L3+
NC
L2–
36
35
L2+
L1–
34
L1+
33
HS/GND
32
HS/GND
31
HS/GND
30
HS/GND
29
NC
28
NC
27
26
REG
25
NC
CONNECTION DIAGRAM
QSOP-36 (Top View)
MWP Package
REG
1
N/C
2
N/C
3
-
L1+
L1–
L2+
L2–
HS/GND
HS/GND
HS/GND
L3+
L3–
L4+
L4–
L5–
DISCNCT
GND
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22L5+
21
20
19
TRMPWR
HIPD
LVD
SE
L9–
L9+
L8–
L8+
HS/GND
HS/GND
HS/GND
L7–
L7+
L6–
L6+
DIFF B
DIFSENS
MSTR/SLV
L8+
L8–
L9+
L9–
HS/GND
NC
TERMPWR
HIPD
LVD
SE
HS/GNDHS/GND
2
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