Microsemi LX5219CDW Ultra 9 - channel scsi terminator Datasheet

LIN D O C #: 5219
UltraMAX
TM
LX5219
U LT R A 9 - CHANNEL S C S I TE R M I N ATOR
T
H E
I
N F I N I T E
P
O W E R
O F
I
P
N N O VA T I O N
R O D U C T I O N
DESCRIPTION
The LX5219 SCSI terminator is part of Linfinity's
UltraMAX family of high-performance, adaptive, nonlinear mode SCSI products, which are designed to
deliver true UltraSCSI performance in SCSI applications. The low voltage BiCMOS architecture employed in its design offers superior performance to
older linear passive and active techniques. Linfinity's
UltraMAX architecture employs high-speed adaptive
elements for each channel, thereby providing the
fastest response possible — typically 35MHz, which
is 100 times faster than the older linear regulator/
terminator approach used by other manufacturers.
Products using this older linear regulator approach
have bandwidths which are dominated by the output
capacitor and which are limited to 500KHz (see
further discussion in the Functional Description
section). The UltraMAX architecture also eliminates
the output compensation capacitor typical in earlier
terminator designs. It is approved for use with SCSI1, -2, -3, UltraSCSI and beyond — providing the
highest performance alternative available today.
Another key improvement offered by the LX5219
lies in its ability to insure reliable, error free communications even in systems which do not adhere
to recommended SCSI hardware design guidelines,
such as the use of improper cable lengths and
impedances. Frequently, this situation is not con-
D
A T A
S
H E E T
K E Y F E AT U R E S
trolled by the peripheral or host designer and, when
problems occur, they are the first to be made aware
of the problem. The LX5219 architecture is much
more tolerant of marginal system integrations.
Recognizing the needs of portable and
configurable peripherals, the LX5219 has an active
low TTL compatible sleep/disable mode. Quiescent
current is typically less than (275µA) in this mode,
while the output capacitance is also less than 3pF.
The obvious advantage of extended battery life for
portable systems is inherent in the product's sleepmode feature. Additionally, the disable function
permits factory-floor or production-line
configurability, reducing inventory and product-line
diversity costs. Field configurability can also be
accomplished without physically removing components which, often times results in field returns due
to mishandling.
Reduced component counts is also inherent in
the LX5219 architecture. Traditional termination
techniques require large stabilization and transient
protection capacitors of up to 20µF in value and
size. The LX5219 architecture does not require these
components, allowing all the cost savings associated
with inventory, board space, assembly, reliability,
and component costs.
■ ULTRA-FAST RESPONSE FOR FAST-20
SCSI APPLICATIONS
■ HOT SWAP COMPATIBLE
■ 35MHz CHANNEL BANDWIDTH
■ 3.5V OPERATION
■ LESS THAN 3pF OUTPUT CAPACITANCE
■ SLEEP-MODE CURRENT LESS THAN
275µA
■ THERMALLY SELF LIMITING
■ NO EXTERNAL COMPENSATION
CAPACITORS
■ IMPLEMENTS 8-BIT OR 16-BIT (WIDE)
APPLICATIONS
■ COMPATIBLE WITH ACTIVE NEGATION
DRIVERS (60mA / CHANNEL)
■ COMPATIBLE WITH PASSIVE AND
ACTIVE TERMINATIONS
■ APPROVED FOR USE WITH SCSI 1, 2, 3
AND ULTRASCSI
■ CONSULT FACTORY FOR APPLICATION
TEST REPORT
■ EVALUATION BOARD AVAILABLE
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 - 2 0 M H Z
D R I V I N G W AV E F O R M - 2 0 M H Z
Driver
Receiver
1 Meter, AWG 28
LX5219
LX5219
LX5268
LX5268
PA C K A G E O R D E R I N F O R M AT I O N
TJ (°C)
0 to 70
SOWB
DW Plastic
16-pin
LX5219CDW
TSSOP
PW Plastic
20-pin
NOTE:
For An In-Depth
Discussion On Applying
SCSI, Request Linfinity
Application Note:
"Understanding The
Single-Ended SCSI Bus"
LX5219CPW
Note: All surface-mount packages are available in Tape & Reel.
Append the letter "T" to part number. (i.e. LX5219CDWT)
Copyright © 1998
Rev. 1.8 3/98
LINFINITY MICROELECTRONICS INC.
11861 W ESTERN A VENUE, G ARDEN G ROVE, CA. 92841, 714-898-8121, F AX: 714-893-2570
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P R O D U C T D ATA B O O K 1 9 9 6 / 1 9 9 7
UltraMAX
LX5219
U LT R A 9 - CHANNEL S C S I TE R M I N ATOR
P
R O D U C T I O N
A B S O L U T E M A X I M U M R AT I N G S
D
A T A
S
H E E T
(Note 1)
Continuous Termination Voltage .......................................................................... 10V
Continuous Output Voltage Range .............................................................. 0 to 5.5V
Continuous Disable Voltage Range ............................................................. 0 to 5.5V
Operating Junction Temperature ........................................................... 0°C to 125°C
Storage Temperature Range ............................................................. -65°C to +150°C
Solder Temperature (Soldering, 10 seconds) ................................................... 300°C
Note 1. Exceeding these ratings could cause damage to the device.
PA C K A G E P I N O U T S
TERM POWER
N.C.
D0
D1
D2
D3
D4
GND
PW PACKAGE:
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
TERM POWER
N.C.
DISABLE
D8
D7
D6
D5
GND
DW PACKAGE
(Top View)
T H E R M A L D ATA
DW PACKAGE:
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
1
95°C/W
144°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.
TERM POWER
N.C.
N.C.
D0
D1
D2
D3
D4
N.C.
GND
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
10
12
11
TERM POWER
DISABLE
N.C.
D8
D7
N.C.
D6
D5
N.C.
GND
PW PACKAGE
(Top View)
2
Copyright © 1998
Rev. 1.8 3/98
P R O D U C T D ATA B O O K 1 9 9 6 / 1 9 9 7
UltraMAX
LX5219
U LT R A 9 - CHANNEL S C S I TE R M I N ATOR
P
R O D U C T I O N
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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
Symbol
Termination Voltage
High Level Disable Input Voltage
Low Level Disable Input Voltage
Operating Virtual Junction Temperature Range
LX5219C
VTERM
VIH
VIL
(Note 2)
Recommended Operating Conditions
Min.
Typ.
Max.
Units
3.5
2
0
5.5
VTERM
0.8
V
V
V
0
125
°C
Note 2. Range over which the device is functional.
ELECTRICAL
CHARACTERISTICS
Term Power = 4.75V unless otherwise specified. Unless otherwise specified, these specifications apply at the recommended operating ambient temperature of TA = 25°C. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.
Parameter
Symbol
Output High Voltage
TermPwr Supply Current
VOUT
ICC
Output Current
Disable Input Current
IOUT
Output Leakage Current
Capacitance in Disabled Mode
Channel Bandwidth
Termination Sink Current, per Channel
Copyright © 1998
Rev. 1.8 3/98
COUT
BW
I SINK
Test Conditions
Min.
2.65
All data lines = open
All data lines = 0.5V
Disable Pin < 0.8V
VOUT = 0.5V
Disable Pin = 4.75V
Disable Pin = 0V
Disable Pin = < 0.8V, VO = 0.5V
VOUT = 0V, frequency = 1MHz
VOUT = 4V
-21
LX5219
Typ.
Max.
2.85
6
215
375
-23
10
-90
10
3
35
60
9
225
-24
Units
V
mA
mA
µA
mA
nA
µA
nA
pF
MHz
mA
3
P R O D U C T D ATA B O O K 1 9 9 6 / 1 9 9 7
UltraMAX
LX5219
U LT R A 9 - CHANNEL S C S I TE R M I N ATOR
P
R O D U C T I O N
D
A T A
S
H E E T
BLOCK DIAGRAM
TERM POWER
THERMAL
LIMITING
CIRCUIT
CURRENT
BIASING
CIRCUIT
24mA CURRENT
LIMITING CIRCUIT
DATA OUTPUT
PIN DB(0)
2.85V
DISABLE
PIN
1.4V
1 OF 9 CHANNELS
FUNCTIONAL DESCRIPTION
Cable transmission theory suggests to optimize signal speed
by delivering 24mA on assertion and by imposing 2.85V on
and quality, the termination should act both as an ideal voltage
deassertion. In order to disable the device, the Disable pin
reference when the line is released (deasserted) and as an
must be driven logic Low. This mode of operation places
ideal current source when the line is active (asserted).
the device in a sleep state where a meager 275µA of quiescent
Common active terminators, which consist of Linear Regulators
current is consumed. Additionally, all outputs are in a Hi-Z
in series with resistors (typically
(impedance) state. Sleep mode can
POWER UP / POWER DOWN FUNCTION TABLE
110Ω), are a compromise. As the
be used for power conservation or
line voltage increases, the amount
to completely eliminate the termiDisable
Quiescent
Outputs
of current decreases linearly by the
nator from the SCSI chain. In the
(LX5219)
Current
equation V = I * R. The LX5219,
second case, termination node cawith its unique new architecture
pacitance is important to consider.
H
Enabled
6mA
applies the maximum amount of
The terminator will appear as a
L
HI Z
275µA
current regardless of line voltage
parasitic distributed capacitance on
Open
Enabled
6mA
until the termination high threshthe line, which can detract from bus
old (2.85V) is reached.
performance. For this reason, the
Acting as a near ideal line terminator, the LX5219 closely
LX5219 has been optimized to have only 3pF of capacitance
reproduces the optimum case when the device is enabled.
per output in the sleep state.
To enable the device the Disable Pin must be pulled logic
An additional feature of the LX5219 is its compatibility with
High or left Open. During this mode of operation, quiescent
active negation drivers. The device handles up to 60mA of
current is 6mA and the device will respond to line demands
sink current for drivers which exceed the 2.85V output high.
4
Copyright © 1998
Rev. 1.8 3/98
P R O D U C T D ATA B O O K 1 9 9 6 / 1 9 9 7
UltraMAX
LX5219
U LT R A 9 - CHANNEL S C S I TE R M I N ATOR
P
R O D U C T I O N
D
A T A
S
GRAPH / CURVE INDEX
H E E T
FIGURE INDEX
Waveforms
Application Circuits
FIGURE #
FIGURE #
1A. RECEIVING WAVEFORM (Freq. = 1.0MHz)
16. 8-BIT SCSI SYSTEM APPLICATION
1B. DRIVING WAVEFORM
2A. RECEIVING WAVEFORM (Freq. = 5.0MHz)
2B. DRIVING WAVEFORM
3.
10MHz WAVEFORM
4.
20MHz WAVEFORM
Characteristic Curves
FIGURE #
5.
OUTPUT HIGH VOLTAGE vs. JUNCTION TEMPERATURE
6.
OUTPUT CURRENT vs. JUNCTION TEMPERATURE
7.
OUTPUT CURRENT vs. OUTPUT HIGH VOLTAGE (VT = 4.75V)
8.
OUTPUT CURRENT vs. OUTPUT HIGH VOLTAGE (VT = 3.3V)
9.
TERMINATION VOLTAGE vs. SUPPLY CURRENT
10. TERMPWR SUPPLY CURRENT vs. TERMINATION VOLTAGE (Disabled)
— LX5219
11. OUTPUT HIGH VOLTAGE vs. JUNCTION TEMPERATURE (VT = 3.3V)
12. OUTPUT CURRENT vs. JUCTION TEMPERATURE (VT = 3.3V)
13. OUTPUT HIGH VOLTAGE vs. TERMINATION VOLTAGE
14. OUTPUT CURRENT vs. TERMINATION VOLTAGE
15. OUTPUT CURRENT MATCHING CHANNEL TO CHANNEL
Copyright © 1998
Rev. 1.8 3/98
5
P R O D U C T D ATA B O O K 1 9 9 6 / 1 9 9 7
UltraMAX
LX5219
U LT R A 9 - CHANNEL S C S I TE R M I N ATOR
P
R O D U C T I O N
D
CHARACTERISTIC
FIGURE 1A. — RECEIVING WAVEFORM
S
A T A
CURVES
FIGURE 1B. — DRIVING WAVEFORM
3.5
3.5
freq.=1.03844MHz
freq.=1.00266MHz
3
3
2.5
2.5
Line Voltage - (V)
Line Voltage - (V)
H E E T
2
1.5
1
2
1.5
1
0.5
0.5
GND
GND
-0.5
-0.5
Time - (250ns/Div.)
Time - (250ns/Div.)
END-DRIVEN CABLE
Driver
Fig. 1B
Receiver
Fig. 1A
6 Meter, 92Ω
LX5219
LX5219
75C08
6
75C08
Copyright © 1998
Rev. 1.8 3/98
P R O D U C T D ATA B O O K 1 9 9 6 / 1 9 9 7
UltraMAX
LX5219
U LT R A 9 - CHANNEL S C S I TE R M I N ATOR
P
R O D U C T I O N
D
CHARACTERISTIC
FIGURE 2A. — RECEIVING WAVEFORM
S
A T A
CURVES
FIGURE 2B. — DRIVING WAVEFORM
3.5
3.5
freq.=4.9961MHz
freq.=5.0092MHz
3
3
2.5
2.5
Line Voltage - (V)
Line Voltage - (V)
H E E T
2
1.5
1
2
1.5
1
0.5
0.5
GND
GND
-0.5
-0.5
Time - (50ns/Div.)
Time - (50ns/Div.)
END-DRIVEN CABLE
Driver
Fig. 2B
Receiver
Fig. 2A
6 Meter, 92Ω
LX5219
LX5219
75C08
Copyright © 1998
Rev. 1.8 3/98
75C08
7
P R O D U C T D ATA B O O K 1 9 9 6 / 1 9 9 7
UltraMAX
LX5219
U LT R A 9 - CHANNEL S C S I TE R M I N ATOR
P
R O D U C T I O N
D
A T A
CHARACTERISTIC
FIGURE 3. — 10MHz WAVEFORM
S
CURVES
FIGURE 4. — 20MHz WAVEFORM
4
4
Ch2 Freq.=20.020MHz
Ch2 Freq.=10.096MHz
3
3
2
2
#2
Line Voltage - (V)
Line Voltage - (V)
H E E T
1
#1
0
#3
4
#1
#2
1
0
#3
4
GND
GND
Time - (10ns/Div.)
Time - (20ns/Div.)
END-DRIVEN CABLE
4.75V
LX5219
1
6 Meter, 72Ω
LX5268
2
4.75V
LX5219
LX5268
3
8
Copyright © 1998
Rev. 1.8 3/98
P R O D U C T D ATA B O O K 1 9 9 6 / 1 9 9 7
UltraMAX
LX5219
U LT R A 9 - CHANNEL S C S I TE R M I N ATOR
P
R O D U C T I O N
D
A T A
CHARACTERISTIC
H E E T
CURVES
FIGURE 6. — OUTPUT CURRENT vs. JUNCTION TEMP.
4.5
30
4
25
(IOUT) Output Current - (mA)
(VOUT) Output High Voltage - (V)
FIGURE 5. — OUTPUT HIGH VOLTAGE vs. JUNCTION TEMP.
S
3.5
3
2.5
20
15
10
VT = 4.75V
2
5
0
25
50
75
125
100
0
(TJ) Junction Temperature - (°C)
25
50
75
(TJ) Junction Temperature - (°C)
FIGURE 7. — OUTPUT CURRENT vs. OUTPUT HIGH VOLTAGE
FIGURE 8. — OUTPUT CURRENT vs. OUTPUT HIGH VOLTAGE
25
25
VT = 3.3V
TA = 25°C
20
(IOUT) Output Current - (mA)
(IOUT) Output Current - (mA)
VT = 4.75V
TA = 25°C
15
10
5
0
20
15
10
5
0
0
0.4
0.8
1.2
1.6
2
2.4
2.8
(VOUT) Output High Voltage - (V)
Copyright © 1998
Rev. 1.8 3/98
125
100
3.2
0
0.4
0.8
1.2
1.6
2
2.4
2.8
3.2
(VOUT) Output High Voltage - (V)
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P R O D U C T D ATA B O O K 1 9 9 6 / 1 9 9 7
UltraMAX
LX5219
U LT R A 9 - CHANNEL S C S I TE R M I N ATOR
P
R O D U C T I O N
D
A T A
CHARACTERISTIC
FIGURE 9. — TERMPWR SUPPLY CURRENT
S
CURVES
FIGURE 10. — LX5219 TERMPWR SUPPLY CURRENT
vs. TERMINATION VOLTAGE (Disabled)
vs. TERMINATION VOLTAGE
500
(ICC) TermPwr Supply Current - (µA)
(ICC) TermPwr Supply Current - (mA)
7
6
5
4
3
2
1
0
2.5
400
350
300
250
200
150
100
50
0
3.5
3
450
4
4.5
5
6
5.5
0
(VTERM) Termination Voltage - (V)
2
3
4
5
6
FIGURE 12. — OUTPUT CURRENT vs. JUNCTION TEMP.
30
4.5
VT = 3.3V
VT = 3.3V
4
(IOUT) Output Current - (mA)
(VOUT) Output High Voltage - (V)
1
(VTERM) Termination Voltage - (V)
FIGURE 11. — OUTPUT HIGH VOLTAGE vs. JUNCTION TEMP.
3.5
3
2.5
25
20
15
10
5
2
0
25
50
75
100
(TJ) Junction Temperature - (°C)
10
H E E T
125
0
25
50
75
100
125
(TJ) Junction Temperature - (°C)
Copyright © 1998
Rev. 1.8 3/98
P R O D U C T D ATA B O O K 1 9 9 6 / 1 9 9 7
UltraMAX
LX5219
U LT R A 9 - CHANNEL S C S I TE R M I N ATOR
P
R O D U C T I O N
D
CHARACTERISTIC
FIGURE 13. — OUTPUT HIGH VOLTAGE
S
A T A
H E E T
CURVES
FIGURE 14. — OUTPUT CURRENT vs. TERMINATION VOLTAGE
vs. TERMINATION VOLTAGE
25
3.5
(VOUT) Output High Voltage - (V)
(VOUT) Output High Voltage - (V)
4
3
2.5
2
1.5
1
0.5
0
15
10
5
0
3
3.5
4
4.5
5
5.5
(VTERM) Termination Voltage - (V)
Copyright © 1998
Rev. 1.8 3/98
20
6
3
3.5
4
4.5
5
5.5
6
(VTERM) Termination Voltage - (V)
11
P R O D U C T D ATA B O O K 1 9 9 6 / 1 9 9 7
UltraMAX
LX5219
U LT R A 9 - CHANNEL S C S I TE R M I N ATOR
P
R O D U C T I O N
D
A T A
CHARACTERISTIC
S
H E E T
CURVES
FIGURE 15. — OUTPUT CURRENT CHANNEL TO CHANNEL MATCHING
24
23.5
Io (mA)
23
23.5 - 24
23 - 23.5
22.5 - 23
22 - 22.5
21.5 - 22
21 - 21.5
22.5
22
21.5
i8
i6
21
i4
1
2
3
4
5
6
7
8
9 10 11
12 13 14
15 16 17
18 19 20
i0
Part #
21 22
23 24
25
Channel
i2
A P P L I C A T I O N S C H E M AT I C
FIGURE 16 — 8-BIT SCSI SYSTEM APPLICATION
DB (0)
DB (1)
DB (6)
DB (7)
DB (P)
DB (6)
DB (7)
DB (P)
TERMPWR
~ ~
VTERM
~ ~ ~
LX5219
ATN
BSY
LX5219
TERMPWR
2.2µF
DISCONNECT
VTERM
DB (0)
DB (1)
5V
TERMPWR
VTERM
SCSI CABLE
ACK
RST
MSG
ATN
BSY
ACK
RST
MSG
LX5219
DISCONNECT
LX5219
TERMPWR
DISCONNECT
TERM POWER
VTERM
~ ~
2.2µF
PERIPHERAL
~ ~ ~
DISCONNECT
HOST
TERM POWER
5V
Note: Add third LX5219 for 16-bit SCSI
UltraMAX is a trademark of Linfinity Microelectronics Inc.
PRODUCTION DATA - Information contained in this document is proprietary to Linfinity, 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.
12
Copyright © 1998
Rev. 1.8 3/98
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