0 to 70 LX5107CDW LX5107CPWP
PACKAGE ORDER INFORMATION
T
J
(°C)
Plastic SOWB
16-pin
DW
Plastic TSSOP
20-pin, Power
PWP
Note: All surface-mount packages are available in Tape & Reel.
Append the letter "T" to part number. (i.e. LX5107CDWT)
9-LINE LOW CAPACITANCE, µPOWER SCSI TERMINATOR
PRODUCTION DATA SHEET
THE INFINITE POWER OF INNOVATION
LX5107
LIN DOC #:
5107
DESCRIPTION
The LX5107 is a nine-line active terminator
for the SCSI parallel bus. This SCSI stan-
dard recommends active termination at
both ends of the SCSI bus.
During disconnect mode, the LX5107
requires a meager 30µA of supply current
while offering only 3.0pF of output capaci-
tance. To enter this low-power mode, the
disconnect pin should be driven low
thereby disconnecting the terminating re-
sistors and placing the internal low drop-
out regulator into low-power mode. In
disconnect mode, each termination line
presents a high impedance to the SCSI bus
with the overall effect being to preserve
high signal integrity and yield subsequent
reliable, error free communications.
During normal operation, the LX5107
consumes only 600µA of current which is
the lowest enabled supply current of any
terminator available on the market today.
Linfinity's proprietary BiCMOS low drop-
out regulator architecture enables this
unique and very efficient operating char-
acteristic.
The LX5107 also offers a precisely
trimmed channel output current specified
to a 5% tolerance. The maximum value
of the output current is trimmed as closely
as possible to the SCSI standard maximum
specification to give the highest possible
noise margin for fast SCSI operation. In
addition, the LX5107 sinks up to 50mA of
current making it compatible with today's
fast active negation drivers.
The LX5107 is a superior, pin-for-pin
replacement for a variety of industry prod-
ucts such as the DS2107S and DS21S07A
.
KEY FEATURES
■3.0pF OUTPUT CAPACITANCE DURING
DISCONNECT
■30µA SUPPLY CURRENT IN DISCONNECT
MODE
■600µA SUPPLY CURRENT DURING NORMAL
OPERATION
■50mA SINK CURRENT FOR ACTIVE
NEGATION
■LOGIC COMMAND DISCONNECTS ALL
TERMINATION LINES
■CURRENT LIMIT AND THERMAL PROTECTION
■COMPATIBLE WITH SCSI 1, 2 AND 3
STANDARDS
■MEETS SCSI HOT PLUGGING CAPABILITY
■CONSULT FACTORY FOR APPLICATION TEST
REPORT: 5107TR
PRODUCT HIGHLIGHT
RECEIVING WAVEFORM - 10MHZDRIVING WAVEFORM - 10MHZ
Receiver
LX5107 LX5107
LX5268 LX5268
1 Meter, AWG 28
Driver
NOTE:
For An In-Depth
Discussion On Applying
SCSI, Request Linfinity
Application Note:
"Understanding The
Single-Ended SCSI Bus"
IMPORTANT: For the most current data, consult LinFinity's web site: http://www.linfinity.com.
Copyright © 1997
Rev. 1.2 11/97 1
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570
LINFINITY MICROELECTRONICS INC.
OBSOLETE PRODUCT
NOT RECOMMENDED FOR NEW DESIGNS
9-LINE LOW CAPACITANCE, µPOWER SCSI TERMINATOR
LX5107
PRODUCT DATABOOK 1996/1997
Copyright © 1997
Rev. 1.2 11/97
2
PRODUCTION DATA SHEET
ABSOLUTE MAXIMUM RATINGS (Note 1)
TermPwr Voltage .................................................................................................+7V
Signal Line Voltage ................................................................................... 0V to +7V
Regulator Output Current ................................................................................... 0.5A
Operating Junction Temperature
Plastic (DW, PW Packages) ......................................................................... 150°C
Storage Temperature Range .............................................................. -65°C to 150°C
Lead Temperature (Soldering, 10 seconds) .................................................... 300°C
Note 1. Exceeding these ratings could cause damage to the device. All voltages are with
respect to Ground. Currents are positive into, negative out of the specified
terminal.
DW PACKAGE:
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θθ
θθ
θJA 95°C/W
PWP PACKAGE:
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θθ
θθ
θJA 83°C/W
Junction Temperature Calculation: TJ = TA + (PD x θJA).
The θJA numbers are guidelines for the thermal performance of the device/pc-board
system. All of the above assume no ambient airflow.
THERMAL DATA
PACKAGE PIN OUTS
DW PACKAGE
(Top View)
VTERM
R1
R2
R3
R4
R5
VREF1
GND
1 16
215
314
413
512
611
710
89
PD
VREF
2
N.C.
R9
R8
R7
R6
VTERM
Disconnect Outputs Quiescent
Current
L HI Z 30µA
H Enabled 600µA
Open Enabled 600µA
POWER UP / POWER DOWN FUNCTION TABLE
20
219
318
417
516
615
714
813
912
10 11
VTERM
HS-GND
R1
R2
R3
R4
R5
HS-GND
VREF1
GND
PD
VREF
2
HS-GND
N.C.
R9
R8
R7
R6
HS-GND
VTERM
PWP PACKAGE
(Top View)
OBSOLETE PRODUCT
NOT RECOMMENDED FOR NEW DESIGNS
9-LINE LOW CAPACITANCE, µPOWER SCSI TERMINATOR
LX5107
PRODUCT DATABOOK 1996/1997
3
Copyright © 1997
Rev. 1.2 11/97
PRODUCTION DATA SHEET
Terminator Impedance ITERM = -5mA to -15mA, TA = 25°C
ITERM = -5mA to -15mA
Terminator Output High Voltage
Max. Output Current VOUT = 0.5V, TA = 25°C
VOUT = 0.5V, 0°C ≤ TA ≤ 70°C
VOUT = 0.5V, VTERM = 4V, TA = 25°C
VOUT = 0.5V, VTERM = 4V, 0°C ≤ TA ≤ 70°C
Output Leakage Disconnect = Low, VOUT = 0V to 4.0V, TA = +25°C
Output Capacitance Disconnect = Low
Sink Current VOUT = 4V
RECOMMENDED OPERATING CONDITIONS (Note 2)
Parameter
Symbol
Units
Recommended Operating Conditions
Min. Typ. Max.
4 5.25 V
05V
0V
TERM V
2.2 µF
070°C
Note 2. Range over which the device is functional.
TermPwr Voltage VTERM
Signal Line Voltage
Disconnect Input Voltage
Output Capacitor on VREF
Operating Virtual Junction Temperature Range
LX5107C
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over the operating ambient temperature range of 0°C ≤ TA ≤ 70°C. TermPwr = 4.75V, Discon-
nect = Open. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.)
Parameter
Symbol
Test Conditions Units
LX5107
Min. Typ. Max.
0.6 2.0 mA
194 210 mA
30 70 µA
Supply Current Section
TermPwr Supply Current All term lines = Open
All term lines = 0.5V
Power Down Mode Disconnect = Low
110 Ω
100 110 120 Ω
2.6 2.9 V
-20.3 -21.8 -23 mA
-19.0 -21.8 -23 mA
-19.5 -21.8 -23 mA
-18.0 -21.8 -23 mA
10 250 nA
3.0 pF
30 50 mA
Output Section (Terminator Lines)
3.6 V
10 20 mV
20 50 mV
0.7 1.0 V
-425 -600 mA
150 °C
Regulator Section
Regulator Output Voltage VREF
Line Regulation VTERM = 4V to 6V
Load Regulation IREG = 0 to -50mA
Drop Out Voltage IREG = -50mA
Short Circuit Current VREG = 0V
Thermal Shutdown
0.8 1.4 2.0 V
65 µA
Disconnect Section
Disconnect Threshold
Input Current Disconnect = 0V
OBSOLETE PRODUCT
NOT RECOMMENDED FOR NEW DESIGNS
9-LINE LOW CAPACITANCE, µPOWER SCSI TERMINATOR
LX5107
PRODUCT DATABOOK 1996/1997
Copyright © 1997
Rev. 1.2 11/97
4
PRODUCTION DATA SHEET
GRAPH / CURVE INDEX
Characteristic Curves
FIGURE #
3. OUTPUT CURRENT vs. JUNCTION TEMPERATURE
4. OUTPUT VOLTAGE vs. JUNCTION TEMPERATURE
5. OUTPUT CURRENT vs. TERMPWR
6. OUTPUT CURRENT vs. OUTPUT VOLTAGE
7. OUTPUT VOLTAGE vs. TERMPWR
8. TERMPWR SUPPLY CURRENT vs. TEMPERATURE
9. OUTPUT LEAKAGE vs. OUTPUT VOLTAGE
10. OUTPUT CURRENT vs. OUTPUT LINE (OUTPUT MATCHING)
11. OUTPUT VOLTAGE vs. TIME (HOTSWAP GRAPH)
FIGURE INDEX
Application Circuits
FIGURE #
1. LX5107 BLOCK DIAGRAM
2. 8-BIT SCSI SYSTEM APPLICATION
OBSOLETE PRODUCT
NOT RECOMMENDED FOR NEW DESIGNS
9-LINE LOW CAPACITANCE, µPOWER SCSI TERMINATOR
LX5107
PRODUCT DATABOOK 1996/1997
5
Copyright © 1997
Rev. 1.2 11/97
PRODUCTION DATA SHEET
BLOCK DIAGRAM
VBG
DISCONNECT
V
TERM
V
REF
V
TERM
V
TERM
T0
T8
Channel
1 of 9
APPLICATION SCHEMATIC
LX5107
ATN
BSY
ACK
RST
MSG
~
~
~
~
~
TERM POWER
~~~~~
DB (P)
DB (7)
DB (6)
DB (1)
DB (0)
5V
DISABLE
LX5107
SCSI CABLE
Note: Add third LX5107 for 16-bit SCSI
TERMPWRTERMPWR
HOST PERIPHERAL
DISABLE
V
TERM
V
REF
2.2µF
V
REF
2.2µF
2.2µF
5V
DISABLEDISABLE
TERM POWER
ATN
BSY
ACK
RST
MSG
DB (P)
DB (7)
DB (6)
DB (1)
DB (0)
V
TERM
V
TERM
V
REF
V
REF
V
TERM
LX5107
LX5107
TERMPWRTERMPWR
2.2µF
2.2µF
2.2µF
FIGURE 2 — 8-BIT SCSI SYSTEM APPLICATION
FIGURE 1 — LX5107 BLOCK DIAGRAM
PRODUCTION DATA - Information contained in this document is proprietary to Lin Finity, and is current as of publication date. This document
may not be modified in any way without the express written consent of LinFinity. Product processing does not necessarily include testing of
all parameters. Linfinity reserves the right to change the configuration and performance of the product and to discontinue product at any time.
OBSOLETE PRODUCT
NOT RECOMMENDED FOR NEW DESIGNS
