Datasheet LX5107CDW, LX5107CPWP Datasheet (Microsemi Corporation)

LIN DOC #:

5107

LX5107

9-LINE LOW CAPACITANCE, µPOWER SCSI TERMINATOR

THE INFINITE POWER OF INNOVATION

DESCRIPTION

The LX5107 is a nine-line active terminator
for the SCSI parallel bus. This SCSI stan­dard 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 capaci­tance. To enter this low-power mode, the
disconnect pin should be driven low
thereby disconnecting the terminating re­sistors and placing the internal low drop­out 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

IMPORTANT: For the most current data, consult LinFinity's web site: http://www.linfinity.com.

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 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 prod­ucts such as the DS2107S and DS21S07A

PRODUCT HIGHLIGHT

P RODUCTION DATA SHEET

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

.

RECEIVING WAVEFORM - 10MHZ DRIVING WAVEFORM - 10MHZ

Receiver

1 Meter, AWG 28

LX5107 LX5107

LX5268 LX5268

PACKAGE ORDER INFORMATION

(°C)

T

J

0 to 70 LX5107CDW LX5107CPWP

Note: All surface-mount packages are available in Tape & Reel.

Append the letter "T" to part number. (i.e. LX5107CDWT)

Plastic SOWB

DW

16-pin

Driver

Plastic TSSOP

PWP

20-pin, Power

NOTE:

For An In-Depth

Discussion On Applying

SCSI, Request Linfinity

Application Note:

"Understanding The

Single-Ended SCSI Bus"

Copyright © 1997
Rev. 1.2 11/97

L INFINITY MICROELECTRONICS INC.

11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: [phone]

1

LX5107

PRODUCT DATABOOK 1996/1997

9-LINE LOW CAPACITANCE, µPOWER SCSI TERMINATOR

RODUCTION DATA SHEET

P

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.

THERMAL DATA

DW PACKAGE:

THERMAL RESISTANCE-JUNCTION TO AMBIENT,

θθ

θ

θθ

JA

95°C/W

PWP PACKAGE:

D

x θ

θθ

θ

θθ

JA

).

JA

THERMAL RESISTANCE-JUNCTION TO AMBIENT,

Junction Temperature Calculation: T
The θ

numbers are guidelines for the thermal performance of the device/pc-board

JA

system. All of the above assume no ambient airflow.

= TA + (P

J

83°C/W

POWER UP / POWER DOWN FUNCTION TABLE

Disconnect Outputs

L HI Z 30µA

H Enabled 600µA

Open Enabled 600µA

Quiescent

Current

PACKAGE PIN OUTS

V

V
GND

V

TERM

HS-GND

HS-GND

V

REF

GND

REF

R1
R2
R3
R4
R5

1 16

TERM

R1

215

R2

314

R3

413

R4

512

R5

611

1

710

89

DW PACKAGE

(Top View)

219

318

417

516

615

714

813

912

1

10 11

PWP PACKAGE

(Top View)

20

PD
V

REF

N.C.
R9
R8
R7
R6
V

TERM

PD
V
HS-GND
N.C.
R9
R8
R7
R6
HS-GND
V

2

REF

TERM

2

2

Copyright © 1997

Rev. 1.2 11/97

PRODUCT DATABOOK 1996/1997

LX5107

9-LINE LOW CAPACITANCE, µPOWER SCSI TERMINATOR

P RODUCTION DATA SHEET

RECOMMENDED OPERATING CONDITIONS (Note 2)

Parameter

TermPwr Voltage V

Symbol

TERM

Signal Line Voltage

Disconnect Input Voltage

Output Capacitor on V

REF

Operating Virtual Junction Temperature Range

LX5107C

Note 2. Range over which the device is functional.

ELECTRICAL CHARACTERISTICS

(Unless otherwise specified, these specifications apply over the operating ambient temperature range of 0°C ≤ TA ≤ 70°C. TermPwr = 4.75V, Discon­nect = 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

Supply Current Section

TermPwr Supply Current All term lines = Open

All term lines = 0.5V

Power Down Mode Disconnect = Low

Output Section (Terminator Lines)

Terminator Impedance I

Terminator Output High Voltage

Max. Output Current V

Output Leakage Disconnect = Low, V

Output Capacitance Disconnect = Low
Sink Current V

= -5mA to -15mA, TA = 25°C

TERM

= -5mA to -15mA

I

TERM

= 0.5V, TA = 25°C

OUT

V

= 0.5V, 0°C ≤ TA ≤ 70°C

OUT

V

OUT

V

OUT

OUT

= 0.5V, V

= 0.5V, V

= 4V

= 4V, TA = 25°C

TERM

= 4V, 0°C ≤ TA ≤ 70°C

TERM

OUT

= 0V to 4.0V, TA = +25°C

Regulator Section

Regulator Output Voltage V

Line Regulation V
Load Regulation I

Drop Out Voltage I
Short Circuit Current V
Thermal Shutdown

REF

= 4V to 6V

TERM

= 0 to -50mA

REG

= -50mA

REG

= 0V

REG

Disconnect Section

Disconnect Threshold

Input Current Disconnect = 0V

Recommended Operating Conditions

Min. Typ. Max.

Units

4 5.25 V
05V

0V

TERM

V

2.2 µF

070°C

LX5107

Min. Typ. Max.

0.6 2.0 mA

194 210 mA

30 70 µA

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

3.6 V
10 20 mV
20 50 mV

0.7 1.0 V

-425 -600 mA

150 °C

0.8 1.4 2.0 V
65 µA

Copyright © 1997
Rev. 1.2 11/97

3

LX5107

PRODUCT DATABOOK 1996/1997

9-LINE LOW CAPACITANCE, µPOWER SCSI TERMINATOR

RODUCTION DATA SHEET

P

FIGURE INDEX

Application Circuits

FIGURE #

1. LX5107 BLOCK DIAGRAM

2. 8-BIT SCSI SYSTEM APPLICATION

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)

4

Copyright © 1997

Rev. 1.2 11/97

DISCONNECT

PRODUCT DATABOOK 1996/1997

9-LINE LOW CAPACITANCE, µPOWER SCSI TERMINATOR

P RODUCTION DATA SHEET

BLOCK DIAGRAM

FIGURE 1 — LX5107 BLOCK DIAGRAM

V

REF

V

TERM

V

TERM

LX5107

Channel
1 of 9

5V

DISABLE

2.2µF

2.2µF

TERM POWER

V

TERM

LX5107

V

REF

VBG

APPLICATION SCHEMATIC

FIGURE 2 — 8-BIT SCSI SYSTEM APPLICATION

~

DB (0)

~

DB (1)

~

DB (6)

~

DB (7)

~

DB (P)

HOST

PERIPHERAL

DB (0)
DB (1)

DB (6)
DB (7)
DB (P)

V

TERM

TERM POWER

V

LX5107

V

TERM

T0

T8

5V

2.2µF

DISABLEDISABLE

REF

2.2µF

Note: Add third LX5107 for 16-bit SCSI

Copyright © 1997
Rev. 1.2 11/97

DISABLE

2.2µF

V

TERM

LX5107

V

REF

TERMPWRTERMPWR

~

ATN

~

BSY

~

ACK

~

RST

~

MSG

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.

SCSI CABLE

ATN

BSY

ACK

RST

MSG

V

LX5107

V

TERM

TERMPWRTERMPWR

REF

2.2µF

5