UCC5686, UCC5687
27-LINE 3 V - 5 V LVD TERMINATOR FOR WIDE ULTRA2, ULTRA3,
ULTRA160, AND ULTRA320 SCSI WITH INTEGRATED SPI 3 DELAY
SLUS459B OCTOBER 2000 REVISED APRIL 2001
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D
SCSI SPI-2, SPI-3, Ultra2, Ultra3, Ultra160,
Ultra320 SCSI Compliance
D
Smallest Footprint
D
Lowest Channel
Capacitance, 2 pF
D
Less than 0.5-pF Capacitance
Differential Between Pairs
D
2.7 V to 5.25 V Operation
D
Differential Failsafe Bias
D
Builtin SPI-3 Mode
Change/Filter Delay
D
64-Pin Low Profile QFP
description
The UCC5686 is a twenty-seven line active terminator for low-voltage-differential (LVD) SCSI networks. This
LVD SCSI-only design allows the user to reach peak bus performance, while reducing system cost. The device
is designed as an active Y-terminator to improve the frequency response of the LVD SCSI Bus. Designed with
a 2-pF (typical) channel capacitance, the UCC5686 allows for minimal bus loading for a maximum number of
peripherals. With the UCC5686, the designer is able to comply with the Ultra2, Ultra3, Ultra160, and Ultra320
SCSI specifications. The UCC5686 also provides a much-needed system migration path for the ever improving
SCSI system standards.
This device is available in the 64-pin low-profile QFP package for ease of layout use.
Single-ended (SE) and high-voltage differential (HVD) SCSI drivers are not supported.
AVAILABLE OPTIONS
DISCONNECT
PACKAGED DEVICES
TA
DISCONNECT
STATUS
LOW PROFILE QFP
(PM)
0
C to 70
C
REGULAR
UCC5686PM
0
C to 70
C
REVERSE
UCC5687PM
The PM package is available taped and reeled. Add TR suffix to
device type (e.g. UCC5686PMTR) to order quantities of 1000
devices per reel.
Copyright
2000, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
17 18 19
{
DISCNCT1
{
DISCNCT2
L21
L21+
L20
L20+
L19
L19+
DIFSENS
DIFFB
L18
L18+
L17
L17+
L16
L16+
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
20
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
L25
L25+
L26
L26+
L27
L27+
STRMPWR
PTRMPWR
REG
SGND
PGND
LVD
L10
L10+
L11
L11+
21 22 23 24
L22+
L6+
63 62 61 60 59
64
58
L23+
L23
L9+
L9
L8+
L8
L7+
L3
L4+
L4
L14+
L13+
L13
L1+
L1
L2+
L2
L3+
56 55 54
57
25 26 27 28 29
53 52
L12+
L6
L5+
51 50 49
30 31 32
L14
L15+
L15
L5
L7
L22
L24+
L24
L12
{
For the UCC5687, Pin 47 is DISCNCT1 and Pin 48 is DISCNCT2.
PM PACKAGE
(TOP VIEW)
UCC5686, UCC5687
27-LINE 3 V - 5 V LVD TERMINATOR FOR WIDE ULTRA2, ULTRA3,
ULTRA160, AND ULTRA320 SCSI WITH INTEGRATED SPI 3 DELAY
SLUS459B OCTOBER 2000 REVISED APRIL 2001
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
block diagram
UDG-00123
48
*DISCNCT1
12
LVD
9
REG
22
L1
21
L1+
5
L27
6
L27+
+56mV
SOURCE/SINK
REGULATOR
0.6V
2.15 V
52
52
52
52
125
SE
HPD
39
125
REF
1.25V
REF 1.3V
40
DIFSENS
1.3V +/ 0.1V
DIFFB
47
*DISCNCT2
L10 L27
L1 L9
7
8
STRMPWR
PTRMPWR
10
11
SGND
PGND
*FOR THE UCC5687 PIN 47 IS DISCNCT1 AND PIN 48 IS DISCNCT2.
+
+
+
+
+56mV
+56mV
+56mV
+
+
SE
LVD
HVD
DISCNCT
OPEN
DOWN
OPEN
OPEN
MODE
ALL SWITCHES
15mA
ISOURCE
5mA
50
A
ISINK
200
A
100 ms TO
300 ms
DELAY/
FILTER
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Input voltage V
IN
(STRMPWR, PTRMPWR)
6 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Signal line input voltage
0 V to 5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Regulator output current
0.75 A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
55
C to 150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating virtual junction temperature range, T
J
55
C to 150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature (soldering, 10 seconds)
300
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
Unless otherwise indicated, voltages are reference to ground and currents are positive into and negative out of the specified terminals. Consult
Packaging Section of the Interface Products Data Book (TI Literature Number SLUD002) for thermal limitations and considerations of packages.
All voltages are referenced to GND.
UCC5686, UCC5687
27-LINE 3 V - 5 V LVD TERMINATOR FOR WIDE ULTRA2, ULTRA3,
ULTRA160, AND ULTRA320 SCSI WITH INTEGRATED SPI 3 DELAY
SLUS459B OCTOBER 2000 REVISED APRIL 2001
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range,
xTRMPWR = 2.7 V to 5.25 V, T
A
= 0
_
C to 70
_
C, DISCNCT1 = DISCNCT2 = 0 V for UCC5686,
DISCNCT1 = DISCNCT2 = open for UCC5687, T
A
= T
J
. (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
xTRMPWR Supply Current Section
xTRMPWR supply current
LVD mode
65
mA
xTRMPWR supply current
Disabled terminator
500
A
1.25 V Regulator Section
1.25 V regulator
0.5 V
VCM
2.0 V,
See Note 1
1.15
1.25
1.35
V
Regulator source current
VREG = 0 V
300
240
mA
Regulator sink current
VREG = 3.0 V
240
300
mA
1.3 V (DIFSENS) Regulator Section
1.3 V regulator
5mA
IDIFSENS
50
A
1.2
1.3
1.4
V
Short-circuit source current
VDIFSENS = 0 V
5
8
15
mA
Short-circuit sinkcurrent
VDIFSENS = 2.75 V
50
200
A
Differential Termination Section (Applies to each line pair 127)
Differential bias voltage
100
125
mV
Differential impedance
100
105
110
Common-mode bias voltage
L+ and L shorted together
1.15
1.25
1.35
V
Common-mode impedance
L+ and L shorted together,
See Note 2
110
140
165
Disconnected Termination Section
Output leakage current
10
400
nA
Output capacitance
SE measurement to GND,
See Note 3
3
pF
Disconnect Control (DISCNCT1) or (DISNCNT2) and DIFFB Input Section
DISCNCT threshold voltage
0.8
1.3
2.0
V
DISCNCT input current
VDISCNCT = 0 V and 2.0 V
30
10
A
DIFFB SE to LVD threshold voltage
0.5
0.7
V
DIFFB LVD to HPD threshold voltage
1.9
2.4
V
DIFFB Input current
0 V
VDIFFB
2.75 V
10
10
A
Low-Voltage Differential (LVD) Status Bit Section
Source current
VLOAD = 2.4 V
6
4
mA
Sink current
VLOAD = 0.4 V
2
5
mA
Time Delay/Filter Section
Mode change delay
(See Note 4)
100
190
300
ms
Thermal Shutdown Section
Thermal shutdown threshold
For increasing temperature
140
155
170
_
C
Thermal shutdown hysteresis
10
_
C
NOTES:
1. VCM is applied to all L+ and L lines simultaneously.
2.
Z
CM
+
2.0 V
*
0.5 V
I
VCM (max)
*
I
VCM (max)
, VCM(max) = 2.0 V, VCM(min) = 0.5 V
3. Ensured by design, not production tested.
4. A new mode change can begin any time after a previous mode change has been detected.
UCC5686, UCC5687
27-LINE 3 V - 5 V LVD TERMINATOR FOR WIDE ULTRA2, ULTRA3,
ULTRA160, AND ULTRA320 SCSI WITH INTEGRATED SPI 3 DELAY
SLUS459B OCTOBER 2000 REVISED APRIL 2001
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
pin descriptions
STRMPWR: 2.7 V to 5.25 V power supply for all circuitry except the 1.25-V regulator.
SGND: Ground reference for all circuitry except the 1.25-V regulator.
PTRMPWR: 2.7 V to 5.25 V power supply for the 1.25-V regulator.
PGND: Ground reference for the 1.25-V regulator.
REG: Output of the internal 1.25-V regulator; must be connected to a 4.7-
F bypass capacitor and a
high-frequency, low-ESR 0.01-
F capacitor to GND.
DIFSENS: Drives the SCSI bus DIFF SENSE line to 1.3 V to detect what types of devices are tied to the bus.
DIFFB: DIFF SENSE input pin. Connect through a 20-k
resistor to DIFSENS and through a 0.1-
F capacitor
to GND. Input to comparators that detect what type of drives are connected to the SCSI bus.
DISCNCT1: Disconnect one controls termination lines 1027 (control and low byte).
DISCNCT2: Disconnect two controls termination lines 19 (high byte).
LVD: TTL compatible status bit indicating when low-voltage-differential voltage is present on DIFFB.
L1 thru L27: Negative lines for the SCSI bus.
L1+ thru L27+: Positive lines for the SCSI bus.
UCC5686, UCC5687
27-LINE 3 V - 5 V LVD TERMINATOR FOR WIDE ULTRA2, ULTRA3,
ULTRA160, AND ULTRA320 SCSI WITH INTEGRATED SPI 3 DELAY
SLUS459B OCTOBER 2000 REVISED APRIL 2001
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
REG
STRMPWR
DISCNCT1
CONTROL AND
LOW BYTE
DIFFB
Termpower
0.1
F
7
48
40
9
39
DIFSENS
CONTROL LINES (9)
21
22
60
59
L1+
L1
L9+
L9
DATA (8)
+ PARITY LINES
14
13
37
38
L10+
L10
L18+
L18
41
42
6
5
L19+
L19
L27+
L27
47
DISCNCT2
HIGH BYTE
PTRMPWR
8
4.7
F
UCC5686
11
10
PGND
SGND
4.7
F
0.01
F
DATA (8)
+ PARITY LINES
STRMPWR
REG
DIFFB
40
39
9
7
48
DIFSENS
21
22
60
59
L1+
L1
L9+
L9
14
13
37
38
L10+
L10
L18+
L18
DISCNCT1
CONTROL AND
LOW BYTE
Termpower
41
42
6
5
L19+
L19
L27+
L27
47
DISCNCT2
HIGH BYTE
UCC5686
PTRMPWR
8
4.7
F
11
10
PGND
SGND
4.7
F
0.1
F
0.01
F
20 k
20 k
LVD
12
0.01
F
0.01
F
S1
S2
S4
S3
NOTE A: Close S1, S2, S3, and S4 to connect terminators in UCC5686. Open S1, S2, S3, and S4 to connect terminators in UCC5687.
Figure 1. Typical Application Diagram
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package
Type
Package
Drawing
Pins Package
Qty
Eco Plan
(2)
Lead/Ball Finish
MSL Peak Temp
(3)
UCC5686PM
ACTIVE
LQFP
PM
64
160
TBD
CU NIPDAU
Level-3-260C-168 HR
UCC5686PMTR
ACTIVE
LQFP
PM
64
1000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-3-260C-168 HR
UCC5686PMTRG4
ACTIVE
LQFP
PM
64
1000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-3-260C-168 HR
UCC5687PM
ACTIVE
LQFP
PM
64
160
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-3-260C-168 HR
UCC5687PMTR
ACTIVE
LQFP
PM
64
1000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-3-260C-168 HR
UCC5687PMTRG4
ACTIVE
LQFP
PM
64
1000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-3-260C-168 HR
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco
Plan
-
The
planned
eco-friendly
classification:
Pb-Free
(RoHS)
or
Green
(RoHS
&
no
Sb/Br)
-
please
check
http://www.ti.com/productcontent
for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.
PACKAGE OPTION ADDENDUM
www.ti.com
8-Aug-2005
Addendum-Page 1
IMPORTANT NOTICE
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