LIN D
O C
#:
5211
LX5211
9-L
INE
L
OW
C
APACITANCE
, µP
OWER
SCSI T
ERMINATOR
T
H E
I
N F I N I T E
P
O W E R
O F
I
N N O VA T I O N
P
R O D U C T I O N
D
A T A
S
H E E T
DESCRIPTION
The LX5211 is a nine-line active terminator
for the SCSI parallel bus. The SCSI standard
recommends active termination at both ends
of the SCSI bus.
During disconnect mode, the LX5211 re-
quires a meager 500nA of supply current
while offering only 2.5pF of output capaci-
tance. To enter this low-power mode, the
disconnect pin can be left open (floating)
or driven low, thereby disconnecting the
terminating resistors and placing the internal
low dropout regulator into low-power
mode. In disconnect mode, each termina-
tion 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 communica-
tions.
During normal operation, the LX5211
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 dropout
regulator architecture enables this unique
and very efficient operating characteristic.
The LX5211 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. And
the LX5211 sinks up to 30mA of current,
making it compatible with today's fast active
negation drivers.
The LX5211 is a stable, pin-for-pin re-
placement for a variety of industry products,
such as the UCC5606.
K E Y F E AT U R E S
s
2.5pF OUTPUT CAPACITANCE DURING
DISCONNECT
s
500nA SUPPLY CURRENT IN DISCONNECT
MODE
s
600µA SUPPLY CURRENT DURING NORMAL
OPERATION
s
30mA SINK CURRENT FOR ACTIVE
NEGATION
s
LOGIC COMMAND DISCONNECTS ALL
TERMINATION LINES
s
CURRENT LIMIT AND THERMAL PROTECTION
s
COMPATIBLE WITH SCSI 1, 2, 3, AND ULTRA
SCSI STANDARDS
s
HOT SWAP COMPATIBLE
s
CONSULT FACTORY FOR APPLICATION TEST
REPORT:
5211TR
s
EVALUATION BOARD AVAILABLE:
REQUEST
LXE9005 EVALUATION KIT
IMPORTANT:
For the most current data, consult LinFinity's web site:
http://www.linfinity.com.
PRODUCT HIGHLIGHT
R
E C E I V I N G
W
AV E F O R M
- 20MH
Z
D
R I V I N G
W
AV E F O R M
- 20MH
Z
Receiver
1 Meter, AWG 28
LX5211
LX5268
Driver
LX5211
LX5268
PA C K A G E O R D E R I N F O R M AT I O N
T
A
(°C)
0 to 70
NOTE:
For An In-Depth
Discussion On Applying
SCSI, Request Linfinity
Application Note:
"Understanding The
Single-Ended SCSI Bus"
PWP
Plastic TSSOP
24-pin, Power
LX5211CPWP
DP
Plastic SOIC
16-pin, Power
LX5211CDP
Note: All surface-mount packages are available in Tape & Reel.
Append the letter "T" to part number. (i.e. LX5211CDPT)
Copyright © 1997
Rev. 1.1 5/97
L
IN
F
INITY
M
ICROELECTRONICS
I
NC
.
11861 W
ESTERN
A
VENUE
, G
ARDEN
G
ROVE
, CA. 92841, 714-898-8121, F
AX
: 714-893-2570
1
PRODUCT DATABOOK 1996/1997
LX5211
9-L
INE
L
OW
C
APACITANCE
, µP
OWER
SCSI T
ERMINATOR
P
R O D U C T I O N
D
A T A
S
H E E T
A B S O L U T E M A X I M U M R AT I N G S
(Note 1)
PACKAGE PIN OUTS
T7
T8
T9
N.C.
GND
HEATSINK/GND
HEATSINK/GND
HEATSINK/GND
HEATSINK/GND
DISCONNECT
T1
T2
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
TermPwr Voltage ................................................................................................. +7V
Signal Line Voltage ................................................................................... 0V to +7V
Regulator Output Current ................................................................................... 0.4A
Operating Junction Temperature
Plastic (PWP, DP 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.
T6
T5
REG OUT
N.C.
HEATSINK/GND
HEATSINK/GND
HEATSINK/GND
HEATSINK/GND
N.C.
V
TERM
T4
T3
T H ER MAL DATA
PWP PACKAGE:
THERMAL RESISTANCE-JUNCTION TO LEADS,
θ
JL
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
θ
JA
DP PACKAGE:
THERMAL RESISTANCE-JUNCTION TO LEADS,
θ
JL
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
θ
JA
20°C/W
50°C/W
27°C/W
100°C/W
T7
T8
T9
HEATSINK/GND
GND
DISCONNECT
T1
T2
PWP PACKAGE
(Top View)
16
2
3
4
5
6
7
8
15
14
13
12
11
10
9
Junction Temperature Calculation: T
J
= T
A
+ (P
D
x
θ
JA
).
The
θ
JA
numbers are guidelines for the thermal performance of the device/pc-board
system. All of the above assume no ambient airflow.
T6
T5
REG OUT
HEATSINK/GND
HEATSINK/GND
V
TERM
T4
T3
DP PACKAGE
(Top View)
P
OWER
U
P
/ P
OWER
D
OWN
F
UNCTION
T
ABLE
DISCONNECT
L
H
Open
Outputs
HI Z
Enabled
HI Z
Quiescent
Current
0.5µA
600µA
0.5µA
2
Copyright © 1997
Rev. 1.1 5/97
PRODUCT DATABOOK 1996/1997
LX5211
9-L
INE
L
OW
C
APACITANCE
, µP
OWER
SCSI T
ERMINATOR
P
R O D U C T I O N
D
A T A
S
H E E T
R E C O M M E N D E D O P E R AT I N G C O N D I T I O N S
Parameter
TermPwr Voltage
Signal Line Voltage
DISCONNECT Input Voltage
Output Capacitor on REGOUT
Operating Virtual Junction Temperature Range
LX5211C
Note 2. Range over which the device is functional.
(Note 2)
Symbol
V
TERM
Recommended Operating Conditions
Min.
Typ.
Max.
4
0
0
2.2
0
5.25
5
V
TERM
Units
V
V
V
µF
°C
125
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over the operating ambient temperature range of 0°C
≤
T
A
≤
70°C. TermPwr = 4.75V,
DISCONNECT = 0V. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.)
Parameter
Supply Current Section
TermPwr Supply Current
Power Down Mode
Symbol
Test Conditions
LX5211
Min. Typ.
Max.
0.6
194
0.5
104
100
2.7
-20.3
-19.0
-19.5
-18.0
110
110
2.9
-21.8
-21.8
-21.8
-21.8
10
2.5
30
3.6
10
20
0.7
-200
150
0.8
1.2
210
1
116
120
-23
-23
-23
-23
400
Units
All term lines = Open
All term lines = 0.5V
DISCONNECT = Open
I
TERM
= -5mA to -15mA, T
A
= 25°C
I
TERM
= -5mA to -15mA
V
OUT
= 0.5V, T
A
= 25°C
V
OUT
= 0.5V, 0°C
≤
T
A
≤
70°C
V
OUT
= 0.5V, V
TERM
= 4V, T
A
= 25°C
V
OUT
= 0.5V, V
TERM
= 4V, 0°C
≤
T
A
≤
70°C
DISCONNECT = Open, V
TERM
= 0V to 5.25V
DISCONNECT = Open
V
OUT
= 4V
mA
mA
µA
Ω
Ω
V
mA
mA
mA
mA
nA
pF
mA
V
mV
mV
V
mA
°C
V
µA
Output Section (Terminator Lines)
Terminator Impedance
Terminator Output High Voltage
Max. Output Current
Output Leakage
Output Capacitance
Sink Current
20
Regulator Section
Regulator Output Voltage
Line Regulation
Load Regulation
Drop Out Voltage
Short Circuit Current
Thermal Shutdown
V
TERM
= 4V to 6V
I
REG
= 0 to -50mA
I
REG
= -50mA
V
REG
= 0V
20
50
1.0
-350
Disconnect Section
DISCONNECT Threshold
Input Current
DISCONNECT = 0V
2.0
40
Copyright © 1997
Rev. 1.1 5/97
3
PRODUCT DATABOOK 1996/1997
LX5211
9-L
INE
L
OW
C
APACITANCE
, µP
OWER
SCSI T
ERMINATOR
P
R O D U C T I O N
D
A T A
S
H E E T
BLOCK DIAGRAM
FIGURE 1
— LX5211 BLOCK DIAGRAM
REG OUT
V
TERM
DISCONNECT
VBG
T0
V
TERM
Channel
1 of 9
V
TERM
T8
A P P L I C AT I O N S C H E M AT I C
FIGURE 2
— 8-BIT SCSI SYSTEM APPLICATION
5V
2.2µF
TERM POWER
V
TERM
HOST
PERIPHERAL
TERM POWER
V
TERM
2.2µF
5V
DISCONNECT
LX5211
REGOUT
2.2µF
LX5211
DB (6)
DB (7)
DB (P)
DB (6)
DB (7)
DB (P)
~ ~ ~
REGOUT
2.2µF
TERMPWR
V
TERM
TERMPWR
DISCONNECT
SCSI CABLE
LX5211
REGOUT
2.2µF
LX5211
ACK
RST
MSG
ACK
RST
MSG
~ ~ ~
REGOUT
2.2µF
Note: Add third LX5211 for 16-bit SCSI
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.
4
Copyright © 1997
Rev. 1.1 5/97
DISCONNECT
ATN
BSY
V
TERM
ATN
BSY
~ ~
DISCONNECT
DB (0)
DB (1)
~ ~
DB (0)
DB (1)
