LT1039AI [Linear]

Triple RS232 Driver/Receiver with Shutdown; 三重RS232驱动器/接收器，带有关断


型号：	LT1039AI
厂家：	Linear
描述：	Triple RS232 Driver/Receiver with Shutdown 三重RS232驱动器/接收器，带有关断驱动器
文件：	总12页 (文件大小：276K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

LT1039A/LT1039A-16

Triple RS232 Driver/Receiver

with Shutdown

FEATURES

DESCRIPTION

The LT^®1039A is a triple RS232 driver/receiver that

includes shutdown. Each receiver will accept up to ±30V

input and can drive either TTL or CMOS logic. The RS232

driversacceptTTLlogicinputsandoutputRS232voltage

levels. The outputs are fully protected against overload

and can be shorted to ground or up to ±30V without

damage to the drivers. Additionally, when the system is

shut down or power is off, the outputs are in a high

impedance state allowing data line sharing. On-chip ESD

protection eliminates the need for external protection

devices.

■

On-Chip ESD Protection:

±15kV Human Body Model

±15kV IEC-1000-4-2 Air Gap Test**

±8kV IEC-1000-4-2 Contact Test

■

125kBd Operation with 3kΩ/2500pF Load

■

250kBd Operation with 3kΩ/1000pF Load

■

Operates from ±5V to ±15V Supplies

■

Fully Protected Against Overload

■

Outputs Can Be Driven ±30V Without Damage

■

Three-State Outputs; Outputs Open When Off

■

Bipolar Circuit—No Latchup

±30V Input Range

Triple Driver/Receiver

■

A bias pin allows one receiver to be kept on while the rest

of the part is shut down.

■

No Supply Current in Shutdown

The LT1039A is also available in the 16-pin version,

without shutdown or bias pin functions.

■

30kΩ Input Impedance

■

Meets All RS232 Specifications

For applications requiring operation from a single 5V

supply, see the LT1180A/LT1181A and LT1130A data

sheets.

■

16-Pin Version—Pin Compatible with MC145406

Available in SO Package

■

, LTC and LT are registered trademarks of Linear Technology Corporation.

APPLICATIONS

■

RS232 Interface

Terminals

■

Modems

TYPICAL APPLICATION

12V

BIAS*

Driver Output Swing

LT1039A

30k

ON/OFF

LOGIC

RS232 IN

–0.4

–0.8

–1.2

–1.6

–2.0

50Ω**

RS232 OUT

LOGIC

RS232 IN

30k

*BIAS PIN USED

TO KEEP THE

50Ω**

LOGIC

RECEIVER ON

1.2

0.8

0.4

WHILE IN SHUTDOWN

RS232 IN

**50Ω RESISTORS

MAY BE REQUIRED

FOR IEC-1000-4-2

ESD PROTECTION

DEPENDING UPON

PC BOARD AND

50Ω**

LOGIC

–

0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

OUTPUT CURRENT (mA)

1039A TA02

–

GND

–12V

1039A TA01

CONNECTOR LEAD LENGTH

LT1039A/LT1039A-16

W W U W

ABSOLUTE MAXIMUM RATINGS

Supply Voltage

Short-Circuit Duration ..................................... Indefinite

Operating Temperature Range

LT1039AC................................................ 0°C to 70°C

LT1039AI........................................... –40°C to 85°C

LT1039AM....................................... –55°C to 125°C

Storage Temperature Range ................. – 65°C to 150°C

Lead Temperature (Soldering, 10 sec).................. 300°C

Driver (V⁺, V^–) ................................................. ±16V

Receiver (V_CC) ...................................................... 7V

Logic Inputs .................................................. V^–to 25V

Receiver Inputs..................................................... ±30V

ON/OFF Input .............................................. GND to 12V

Driver Outputs ............................. V^–+ 30V to V⁺– 30V

W U

PACKAGE/ORDER INFORMATION

ORDER PART

TOP VIEW

NUMBER

BIAS

ON/OFF

REC1 OUT

TR1 IN

LT1039ACN16

LT1039ACSW16

LT1039AIN16

LT1039AISW16

LT1039AMJ16

LT1039ACN

LT1039ACSW

LT1039AIN

LT1039AISW

LT1039AMJ

REC1 OUT

TR1 IN

REC1 IN

TR1 OUT

REC2 IN

TR2 OUT

REC3 IN

TR3 OUT

REC1 IN

TR1 OUT

REC2 IN

TR2 OUT

REC3 IN

TR3 OUT

REC2 OUT

TR2 IN

REC2 OUT

TR2 IN

REC3 OUT

TR3 IN

REC3 OUT

TR3 IN

–

GND

–

GND

Consult Factory

for Availability

J PACKAGE

N PACKAGE

18-LEAD PDIP

J PACKAGE

16-LEAD CERDIP

16-LEAD PDIP

18-LEAD CERDIP

SW PACKAGE

16-LEAD PLASTIC SO WIDE

SW PACKAGE

18-LEAD PLASTIC SO WIDE

T_JMAX= 150°C, θ_JA= 105°C/ W, θ_JC= 30°C/ W (J)

T_JMAX= 125°C, θ_JA= 90°C/ W, θ_JC= 50°C/ W (N)

_JMAX= 125°C, θ_JA= 95°C/ W, θ_JC= 27°C/ W (SW)

T_JMAX= 150°C, θ_JA= 88°C/ W, θ_JC= 22°C/ W (J)

_JMAX= 125°C, θ_JA= 79°C/ W, θ_JC= 36°C/ W (N)

T_JMAX= 125°C, θ_JA= 90°C/ W, θ_JC= 26°C/ W (SW)

ELECTRICAL CHARACTERISTICS

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

–

Driver V = 12V, V = –12V, V

= 2.5V (Note 1)

ON/OFF

Output Voltage Swing

Load = 3k to Ground

Positive

Negative

●

V – 2.0

V – 1.3

–

V + 1.5

V + 1.0

Logic Input Voltage Levels

Logic Input Current

Input Low Level (V

Input High Level (V

= High)

= Low)

●

1.4

0.8

OUT

2.0

OUT

≥ 2.0V

≤ 0.8V

µA

Output Short-Circuit Current

Sourcing Current, V

= 0V

–15

–30

OUT

Sinking Current, V

OUT

Output Leakage Current

Supply Leakage Current

Slew Rate

Shutdown (Notes 2, 3), V

Shutdown (Note 2)

= ±18V, V = 0V

●

200

100

µA

OUT

R = 3k, C = 51pF to 2500pF

V/µs

Supply Current

OUT

= Low

LT1039A/LT1039A-16

ELECTRICAL CHARACTERISTICS

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Prop Delay (t

)

0.6

0.8

1.2

µs

PLH

PHL

Receiver V = 5V, V

= 2.5V (Note 1)

ON/OFF

Input Voltage Thresholds

Input Low Level (V

Input High Level (V

= High)

= Low)

●

0.5

0.1

1.3

1.7

OUT

2.8

1.0

OUT

Hysteresis

●

0.4

Input Resistance

Output Voltage

kΩ

Output Low, I

Output High, I

= –1.6mA

= 160µA

●

0.4

4.8

0.5

OUT

3.5

OUT

Output Short-Circuit Current

Sourcing Current, V

= V

= 0V

●

–10

– 30

OUT

Sinking Current, V

OUT

Output Leakage Current

Supply Current

Shutdown (Note 1), 0V ≤ V

(Note 4)

≤ V , V = 0V

●

µA

OUT

CC IN

Supply Leakage Current

ON/OFF Pin Current

Shutdown (Note 2)

100

0V ≤ V

≤ 5V

–15

µA

ON/OFF

Prop Delay (t

)

200

300

600

PLH

PHL

The

●

denotes specifications which apply over the full operating

Note 3: For T ≥ 100°C leakage current is 350µA max.

temperature range.

Note 4: Bias pin open on 18-pin version.

Note 1: V

Note 2: V

= 5V for LT1039AM grade devices.

ON/OFF

= 0.4V for –55°C ≤ T ≤ 100°C and V

= 0.2V for

ON/OFF

100°C ≤ T ≤ 125°C. Does not apply to LT1039A-16 part.

TYPICAL PERFORMANCE CHARACTERISTICS

Driver Output Short-Circuit Current

Receiver Input Thresholds

ON/OFF Pin Thresholds

3.00

2.75

2.50

2.25

2.00

1.75

1.50

1.25

1.00

0.75

0.50

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

SINKING

INPUT HIGH

INPUT LOW

SOURCING

MINIMUM ON VOLTAGE

MINIMUM OFF VOLTAGE

–55

75 100 125

–55

75 100 125

–55

–25

75 100 125

–25

TEMPERATURE (°C)

1039A G01

1039A G02

1039A G03

LT1039A/LT1039A-16

TYPICAL PERFORMANCE CHARACTERISTICS

Driver Output Leakage

in Shutdown

Receiver Output

Short-Circuit Current

Supply Current in Shutdown

1000

100

1000

100

SUPPLY CURRENT MEASURED

INTO V AND V

SINKING

SOURCING

OUT

–30V

OUT

30V

–55 –25

75 100 125

–55

–25

75 100 125

–55 –25

75 100 125

TEMPERATURE (°C)

1039A G04

1039A G06

1039A G05

ON/OFF Pin Current vs Voltage

Driver Output Swing vs Current

–0.4

–0.8

–1.2

–1.6

–2.0

1.2

0.8

0.4

–5

–10

–

0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

OUTPUT CURRENT (mA)

1039A TA02

INPUT VOLTAGE (V)

1039A G07

Output Waveforms

Shutdown to Driver Output

10V

RECEIVER

OUTPUT

HIGH

DRIVER

OUTPUT

DRIVER

OUTPUT

LOW

–10V

DRIVER

OUTPUT

–5V

INPUT

–10V

ON/OFF

INPUT

1039A G09

V⁺= 12V

2µs/DIV

^–= –12V

_CC= 5V

1039A G10

⁺= 12V

2µs/DIV

V^–= –12V

R_L= 3k

_L= 3k

DRIVER OUTPUT CONNECTED TO RECEIVER INPUT

LT1039A/LT1039A-16

TYPICAL PERFORMANCE CHARACTERISTICS

Shutdown to Receiver Output

BIAS Pin Response Time

RECEIVER

OUTPUT

RECEIVER 1

OUTPUT

ON/OFF

INPUT

BIAS INPUT

(THRU 25kΩ)

1039A G11

1039A G12

V_CC= 5V

2ms/DIV

V_CC= 5V

0.2µs/DIV

PIN FUNCTIONS

(Pin numbers listed are for 18-pin device)

V⁺, V^–(Pins 1, 9): Driver Supply Pins. Supply current

drops to zero in shutdown mode. Driver outputs are in a

high impedance state when V⁺and V^–= 0V.

output pins are internally protected from ESD transients.

In order to insure proper functioning of the ESD protec-

tion devices, the V⁺and V^–supply pins must be

bypassed with low ESR capacitors located close to the

pins. 0.1µF ceramic capacitors work well.

BIAS (Pin 2): Keeps receiver 1 on while the LT1309A is in

theshutdownmode. LeaveBIASpinopenwhennotinuse.

See Applications Information for proper use.

GND (Pin 10): Ground Pin.

RECIN(Pins3, 5, 7):ReceiverInputPins. AcceptsRS232

voltage levels (±30V) and has 0.4V of hysteresis to pro-

vide noise immunity. Input impedance is nominally 30kΩ.

Receiver input pins are internally protected from ESD

transients.InordertoinsureproperfunctioningoftheESD

protection devices, the V_CCand V^–supply pins must be

bypassed with low ESR capacitors located close to the

pins. A 0.1µF ceramic capacitor works well.

TR IN (Pins 11, 13, 15): RS232 Driver Input Pins. Inputs

are TTL/CMOS compatible. Inputs should not be allowed

to float. Tie unused inputs to V_CC.

REC OUT (Pins 12, 14, 16): Receiver Outputs with TTL/

CMOS Voltage Levels. Outputs are in a high impedance

state when in the shutdown mode to allow data line

sharing.Outputsarefullyshort-circuitprotectedtoground

or V_CCwith power on, off or in the shutdown mode.

TR OUT (Pins 4, 6, 8): Driver Outputs with RS232 Voltage

Levels. Outputs are in a high impedance state when in the

shutdown mode or when power is off (V⁺and V^–= 0V) to

allow data line sharing. Outputs are fully short-circuit

protected from V^–+ 30V to V⁺– 30V with power on, off or

in the shutdown mode. Typical output breakdowns are

greater than ±45V and higher applied voltages will not

damage the device if moderately current limited. Driver

ON/OFF (Pin 17): Controls the operation mode of the

LT1039A and is TTL/CMOS compatible. A logic low puts

the device in the shutdown mode which reduces input

supply current to zero and places both driver and receiver

outputs in a high impedance state.

V_CC(Pin 18): 5V Power for Receivers.

LT1039A/LT1039A-16

W U U

APPLICATIONS INFORMATION

The driver output stage of the LT1039A offers signifi-

cantly improved protection over older bipolar and CMOS

designs. In addition to current limiting, the driver output

can be externally forced to ±30V with no damage or

excessive current flow.

Sharing a Receiver Line

RS232

INPUT A

LT1039A #1

RECEIVER

LT1039A Driver

RS232

INPUT B

LOGIC

OUTPUT

LT1039A #2

RECEIVER

30V

LT1039A

OUTPUT CAN

BE FORCED

EXTERNALLY

–30V

LOGIC

INVERTER

1039A AI01

ON/OFF

(CHANNEL SELECT)

INPUT

1039A AI04

The driver outputs utilize high impedance overvoltage

protection, eliminating the flow of fault currents into

supplies, as will happen with conventional diode clamp

configurations.

Transceiver

Older RS232 Drivers and Other CMOS Drivers

LOGIC

TRANSMIT/RECEIVE

LINE

RS232

TRANSMIT/RECEIVE

LINE

LT1039A #1

DRIVER

WITH SOME DRIVERS,

EXTERNALLY APPLIED

VOLTAGE CAN FORCE

THE SUPPLIES

LT1039A #2

RECEIVER

–

1039A AI02

LOGIC

INVERTER

Placing the LT1039A in the shutdown mode (Pin 17 low)

puts both the driver and receiver outputs in a high imped-

ance state. This allows data line sharing and transceiver

applications.

ON/OFF

(TRANSMIT/RECEIVE)

INPUT

1039A AI05

The shutdown mode also drops all supply currents (V_CC,

V⁺, V^–) to zero for power conscious systems.

Sharing a Transmitter Line

LOGIC

INPUT A

LT1039A #1

DRIVER

RS232

TRANSMISSION

LINE

LOGIC

INPUT B

LT1039A #2

DRIVER

LOGIC

INVERTER

ON/OFF

(CHANNEL SELECT)

INPUT

1039A AI03

LT1039A/LT1039A-16

W U U

APPLICATIONS INFORMATION

When driving CMOS logic from a receiver that will be used

in the shutdown mode and there is no other active receiver

ontheline,a51kresistorcanbeplacedfromthelogicinput

to V_CCto force a definite logic level when the receiver

output is in a high impedance state.

Driver inputs should not be allowed to float. Any unused

inputs should be tied to V_CC.

The BIAS pin is used to “keep alive” one receiver while in

the shutdown mode (all other circuitry being inactive).

This allows a system to be in shutdown and still have one

active receiver for transferring data.

Driving CMOS Logic from a Receiver

Keeping Alive One Receiver While in Shutdown

LOGIC

SHUTDOWN

INPUT

CMOS

51k*

LOGIC

OUTPUT

RS232

INPUT

LT1039A

RECEIVER

25k

*FORCES LOGIC INPUT STATE

WHEN V IS LOW

ON/OFF

INPUT

ON/OFF

BIAS

1039A AI06

ON/OFF

RS232

INPUT

LOGIC

OUTPUT

To protect against receiver input overloads in excess of

±30V, a voltage clamp can be placed on the data line and

still maintain RS232 compatibility.

LT1039A

1039A AI07

Input Overvoltage Protection

It can also be used to make an RS232 compatible shut-

down control line. Driving the BIAS pin low through a

resistance of 24k to 30k keeps the receiver active. Do not

drive the BIAS pin directly from a logic output without the

series resistor. An unused BIAS pin should be left open.

RECEIVER

RS232

INPUT

LOGIC

OUTPUT

30k

30V

5.6k

RS232 Compatible Shutdown Control Line

1039A AI07

25k

The receiver input impedance of the LT1039A is nominally

30kΩ. For applications requiring a 5kΩ input impedance,

a 5.6k resistor can be connected from the receiver input to

ground.

BIAS

ON/OFF

RS232

SHUTDOWN

INPUT

LT1039A

5kΩ Impedance Matching

1039A AI08

RECEIVER

RS232

INPUT

LOGIC

OUTPUT

30k

5.6k

1039A AI08

LT1039A/LT1039A-16

PACKAGE DESCRIPTION ^{Dimensions in inches (millimeters) unless otherwise noted.}

J Package

16-Lead CERDIP (Narrow 0.300, Hermetic)

(LTC DWG # 05-08-1110)

0.840

(21.336)

CORNER LEADS OPTION

(4 PLCS)

0.005

(0.127)

MIN

MAX

0.023 – 0.045

(0.584 – 1.143)

HALF LEAD

OPTION

0.220 – 0.310

(5.588 – 7.874)

0.025

(0.635)

RAD TYP

0.045 – 0.068

(1.143 – 1.727)

FULL LEAD

OPTION

0.200

(5.080)

MAX

0.300 BSC

(0.762 BSC)

0.015 – 0.060

(0.380 – 1.520)

0.008 – 0.018

(0.203 – 0.457)

0° – 15°

0.385 ± 0.025

(9.779 ± 0.635)

0.045 – 0.068

(1.143 – 1.727)

0.100 ± 0.010

(2.540 ± 0.254)

0.125

(3.175)

MIN

0.014 – 0.026

(0.360 – 0.660)

NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS.

J16 0996

J Package

18-Lead CERDIP (Narrow 0.300, Hermetic)

(LTC DWG # 05-08-1110)

0.960

(24.384)

MAX

CORNER LEADS OPTION

(4 PLCS)

0.005

(0.127)

MIN

0.023 – 0.045

(0.584 – 1.143)

HALF LEAD

OPTION

0.220 – 0.310

(5.590 – 7.870)

0.025

(0.635)

RAD TYP

0.045 – 0.068

(1.143 – 1.727)

FULL LEAD

OPTION

0.200

(5.080)

MAX

0.300 BSC

(0.762 BSC)

0.015 – 0.060

(0.380 – 1.520)

0.008 – 0.018

(0.203 – 0.457)

0° – 15°

0.385 ± 0.025

(9.779 ± 0.635)

0.045 – 0.068

(1.143 – 1.727)

0.100 ± 0.010

(2.540 ± 0.254)

0.125

(3.175)

MIN

0.014 – 0.026

(0.360 – 0.660)

NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS.

J18 0694

LT1039A/LT1039A-16

PACKAGE DESCRIPTION

Dimensions in inches (millimeters) unless otherwise noted.

N Package

16-Lead PDIP (Narrow 0.300)

(LTC DWG # 05-08-1510)

0.770*

(19.558)

MAX

0.255 ± 0.015*

(6.477 ± 0.381)

0.300 – 0.325

0.130 ± 0.005

0.045 – 0.065

(7.620 – 8.255)

(3.302 ± 0.127)

(1.143 – 1.651)

0.015

(0.381)

MIN

0.065

(1.651)

TYP

0.009 – 0.015

(0.229 – 0.381)

+0.025

0.325

0.005

(0.127)

MIN

0.100 ± 0.010

(2.540 ± 0.254)

–0.015

0.125

(3.175)

MIN

0.018 ± 0.003

+0.635

8.255

(0.457 ± 0.076)

(

)

–0.381

N16 0695

*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.

MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)

N Package

18-Lead PDIP (Narrow 0.300)

(LTC DWG # 05-08-1510)

0.900*

(22.860)

MAX

0.255 ± 0.015*

(6.477 ± 0.381)

0.300 – 0.325

(7.620 – 8.255)

0.130 ± 0.005

(3.302 ± 0.127)

0.045 – 0.065

(1.143 – 1.651)

0.015

(0.381)

MIN

0.065

(1.651)

TYP

0.009 – 0.015

(0.229 – 0.381)

+0.025

0.325

0.005

(0.127)

MIN

0.100 ± 0.010

(2.540 ± 0.254)

–0.015

0.125

(3.175)

MIN

0.018 ± 0.003

+0.635

8.255

(0.457 ± 0.076)

(

)

–0.381

N18 0695

*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.

MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)

LT1039A/LT1039A-16

PACKAGE DESCRIPTION ^{Dimensions in inches (millimeters) unless otherwise noted.}

SW Package

16-Lead Plastic Small Outline (Wide 0.300)

(LTC DWG # 05-08-1620)

0.398 – 0.413*

(10.109 – 10.490)

15 14

0.394 – 0.419

(10.007 – 10.643)

NOTE 1

0.291 – 0.299**

(7.391 – 7.595)

0.037 – 0.045

(0.940 – 1.143)

0.093 – 0.104

(2.362 – 2.642)

0.010 – 0.029

(0.254 – 0.737)

× 45°

0° – 8° TYP

0.050

(1.270)

TYP

0.004 – 0.012

(0.102 – 0.305)

S16 (WIDE) 0396

0.009 – 0.013

NOTE 1

(0.229 – 0.330)

0.014 – 0.019

0.016 – 0.050

(0.356 – 0.482)

TYP

(0.406 – 1.270)

NOTE:

1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.

THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS

*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE

**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE

LT1039A/LT1039A-16

PACKAGE DESCRIPTION _{Dimensions in inches (millimeters) unless otherwise noted.}

SW Package

18-Lead Plastic Small Outline (Wide 0.300)

(LTC DWG # 05-08-1620)

0.447 – 0.463*

(11.354 – 11.760)

14 13

18 17 16

0.394 – 0.419

(10.007 – 10.643)

SEE NOTE

0.291 – 0.299**

(7.391 – 7.595)

0.037 – 0.045

(0.940 – 1.143)

0.093 – 0.104

(2.362 – 2.642)

0.010 – 0.029

(0.254 – 0.737)

× 45°

0° – 8° TYP

0.050

(1.270)

TYP

0.004 – 0.012

0.009 – 0.013

(0.102 – 0.305)

NOTE 1

(0.229 – 0.330)

0.014 – 0.019

0.016 – 0.050

(0.356 – 0.482)

TYP

(0.406 – 1.270)

NOTE:

S18 (WIDE) 0396

1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.

THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS

*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE

**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.

LT1039A/LT1039A-16

TYPICAL APPLICATION

LT1180A (Driver/Receiver with Power Supply) Driving an LT1039A

SHUTDOWN

ON/OFF

LT1180A

ON/OFF

LT1039A

TTL IN

RS232 OUT

TTL IN

RS232 OUT

RS232 IN

TTL IN

RS232 IN

TTL OUT

30k

TTL OUT

RS232 IN

0.1µF

–

30k

0.1µF

–

GND

0.1µF

1039A TA03

RELATED PARTS

PART NUMBER

LTC^®485

DESCRIPTION

COMMENTS

Industry Standard

±15kV ESD Protection

Industry Standard, 0.1µF Capacitors

Low Power RS485 Transceiver

LT1137A

5V 3 Driver/5 Receiver RS232 Transceiver

5V 2 Driver/2 Receiver RS232 Transceiver

V.35 Transceiver

LT1180A/81A

LTC1345

Single 5V Supply Using 0.1µF Capacitors

LTC1348

3.3V 3 Driver/5 Receiver RS232 Transceiver

Operates from 3.3V to 5V Supplies, 5 Receivers Active in Shutdown

1039af LT/TP 0697 2K • PRINTED IN USA

LINEAR TECHNOLOGY CORPORATION 1997

12 ^{Linear Technology Corporation}

●

1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408)432-1900

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FAX: (408) 434-0507 TELEX: 499-3977 www.linear-tech.com

LT1039AI [Linear]

相关型号：

SI9130DB

SI9135LG-T1

SI9135LG-T1-E3

SI9135_11

SI9136_11

SI9130CG-T1-E3

SI9130LG-T1-E3

SI9130_11

SI9137

SI9137DB

SI9137LG

SI9122E