Datasheet LT1032 Datasheet (Linear Technology)

FEATURES

LT1032

Quad Low Power

Line Driver

U

DESCRIPTIO

■

Low Operating Voltage: ±5V to ±15V

■

500µA Supply Current

■

Zero Supply Current when Shut Down

■

Outputs Can Be Driven ±30V

■

Thermal Limiting

■

Output “Open” when Off (Three-State)

■

10mA Output Drive

■

Pinout Similar to 1488

U

APPLICATIO S

■

RS232

■

Power Supply Inverter

■

Micropower Interface

■

Level Translator

The LT®1032 is a RS232 and RS423 line driver that operates over a ±5V to ±15V range on low supply current and can be shut down to zero supply current. Outputs are fully protected from externally applied voltages of ±30V by both current and thermal limiting. Since the output swings to within 200mV of the positive supply and 600mV of the negative supply, power supply needs are minimized.

Also included is a strobe pin to force all outputs low independent of input or shutdown conditions. Further, slew rate can be adjusted with a resistor connected to the supply.

A major advantage of the LT1032 is the high impedance output state when off or powered down.

For applications requiring dual or triple RS232 driver/ receiver devices, see the LT1180A (dual), LT1039A (triple) or the LT1130A data sheets.

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

TYPICAL APPLICATIO

RS232 Line Driver

1

–6V

INPUT

OUTPUT

ON/OFF

(0V TO 5V)

†

INPUT

OUTPUT

GND

*NO CONNECTION NEEDED WHEN NOT USED

†

5V = ON

LT1032

2 3 4 5 6 7

U

14

6V

13

STROBE*

12

INPUT

11

OUTPUT

10

RESPONSE TIME CONTROL*

9

INPUT

8

OUTPUT

LT1032 • TA01

Output Swing vs Output Current

+

V

0.2

0.4

1.0

0.8

0.6

0.4

0.2

–

OUTPUT VOLTAGE REFERRED TO SUPPLIES (V)

V

2

0

V

HIGH

OUT

V

LOW

OUT

6

4

OUTPUT CURRENT (mA)

8

10

LT1032 • TA02

1

LT1032

TOP VIEW

SW PACKAGE

16-LEAD PLASTIC SO (WIDE)

1 2 3 4 5 6 7 8

16 15 14 13 12 11 10

9

V

EE

ON/OFF

GND

NC

V

CC

STROBE

NC

RESPONSE CONTROL

A

W

O

LUTEXI TIS

S

A

WUW

U

(Note 1)

ARB

G

Supply Voltage ..................................................... ±15V

Logic Input Pins ............................................ V– to 25V

ON/OFF Pin ................................................. GND to 15V

Output (Forced) ............................. V– + 30V, V+ – 30V

Response Pin ......................................................... ±6V

Short-Circuit Duration (to ±30V) .................... Indefinite

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

WU

/

1 2 3 4 5 6 7

O

RDER I FOR ATIO

TOP VIEW

V

CC

14

(5V TO 15V)

STROBE

13 12 11

RESPONSE

10

CONTROL

9 8

N PACKAGE

14-LEAD PDIP

ORDER PART

NUMBER

LT1032CJ LT1032CN LT1032IN LT1032MJ

PACKAGE

V

EE

(–15V TO – 5V)

ON/OFF

(0V TO 5V)

GND

J PACKAGE

14-LEAD CERDIP

T

= 85°C, θJA = 100°C/W, θJC = 60°C (CJ)

JMAX

= 85°C, θJA = 100°C/W, θJC = 60°C (CN)

T

JMAX

= 150°C, θJA = 100°C/W, θJC = 60°C (MJ)

T

JMAX

Operating Temperature Range

LT1032C............................................... 0°C to 70°C

LT1032I........................................... – 40°C to 85°C

LT1032M....................................... – 55°C to 125°C

C Grade Guaranteed

Functional by Design .............................. –25°C to 85°C

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

U

ORDER PART

NUMBER

LT1032CSW LT1032ISW

T

= 85°C, θJA = 80°C/W

JMAX

LECTRICAL C CHARA TERIST

E

The ● denotes specifications which apply over the full operating temperature

ICS

range, otherwise specifications are at TA = 25°C. Supply voltage = ±5V to ±15V

PARAMETER CONDITIONS MIN TYP MAX UNITS

Supply Current V Power Supply Leakage Current V

Output Voltage Swing Load = 2mA Positive V+ – 0.3V V+ – 0.1V V

Output Current (Active) V Output Current (Shutdown) V

Output Overload Voltage (Forced) Operating or Shutdown ● V+ – 30V V– + 30V V Input Overload Voltage (Forced) Operating of Shutdown ● V Logic Input Levels Low Input (V

Logic Input Current VIN > 2.0V 2 20 µA

ON/OFF Pin Current 0 ≤ VIN ≤ 5V ● –10 3 50 µA Slew Rate I Change in Slew Rate (Note 3) I

Response Pin Leakage V

Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.

Note 2: 3V applied to the strobe pin will force all outputs low. Strobe pin input impedance is about 2k to ground. Leave open when not used.

2

≥ 2.4V, I

ON/OFF

≤ 0.4V 1 10 µA

ON/OFF

≤ 0.1V, TA = 125°C ● 10 50 µA

V

ON/OFF

= ±5V to ±15V 10 22 mA

SUPPLY

= 0V, V

SUPPLY

V

= ±15V, V

SUPPLY

High Input (V

V

< 0.8V 10 20 µA

IN

RESPONSE RESPONSE

I

RESPONSE

V

= 0, RL = 3k 4 15 30 V/µs = 50µA 50 %

= –50µA–50%

= ±6V, V

SUPPLY RESPONSE

= ±6V

= 0, All Outputs Low ● 500 1000 µA

OUT

Negative V

= ±30V 2 100 µA

OUT

= ±20V 2 100 µA

OUT

–

= High) ● 1.4 0.8 V

OUT

= Low) ● 2 1.4 V

OUT

≤ 0.4V 1 µA

ON/OFF

Note 3: Response can be changed by connecting a resistor to the supply. For supplies less than ±6V this current is disconnected when shut down. Leave open when not used.

–

+ 0.7V V– + 0.9V V

30V V

LPER

F

O

R

ATYPICA

UW

CCHARA TERIST

E

C

LT1032

ICS

On Supply Current vs Temperature

3.0

2.5

2.0

1.5

1.0

SUPPLY CURRENT (mA)

0.5

0

–50

ALL OUTPUTS HIGH

ALL OUTPUTS LOW

–25 0

50 100 125

25 75

TEMPERATURE (˚C)

LT1032 • TPC01

Output Swing vs Output Current

+

V

0.2

0.4

1.0

0.8

0.6

0.4

0.2

–

OUTPUT VOLTAGE REFERRED TO SUPPLIES (V)

V

2

0

V

HIGH

OUT

V

LOW

OUT

6

4

OUTPUT CURRENT (mA)

8

LT1032 • TA02

10

Supply Current vs Supply Voltage

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

SUPPLY CURRENT (mA)

0.4

0.2 0

5

ALL OUTPUTS HIGH

ALL OUTPUTS LOW

7.5

10

SUPPLY VOLTAGE (±V)

Output Leakage vs Temperature

100µA

10µA

1µA

V

= –30V

100nA

OUTPUT CURRENT

10nA

1nA

OUT

V

= 30V

OUT

25 75 100

50

TEMPERATURE (°C)

12.5

LT1032 • TPC02

LT1032 • TPC05

125

Off Supply Current vs Temperature

1000

VS = ±12V

100

10

SUPPLY CURRENT (nA)

1

15

25

50 100 125

75

TEMPERATURE (°C)

LT1032 • TPC03

Response Pin Leakage vs Temperature (Device Off)

1000

100

10

RESPONSE PIN LEAKAGE (µA)

1

25

V = 5V V = –5V

50 75 100

TEMPERATURE (°C)

LT1032 • G06

ON/OFF Pin Current vs Voltage

10

8

6

4

2

0

CURRENT (µA)

–2

–4

–6

1

0

INPUT VOLTAGE (V)

3

2

4

LT1032 • TPC07

Shutdown Pin Voltage vs Temperature

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

ON/OFF PIN VOLTAGE (V)

0.4

0.2

0

–50

5

–25 25

MIN ON VOLTAGE

MAX OFF VOLTAGE

0

50

TEMPERATURE (°C)

125

100

75

150

LT1032 • TPC08

Current Limit vs Temperature

80

70

60

50

40

30

OUTPUT CURRENT (mA)

20

10

0

–25

–55

SINKING

SOURCING

0

50

25

TEMPERATURE (°C)

75

100

125

LT1032 • TPC09

150

3

LT1032

LPER

F

O

R

ATYPICA

UW

CCHARA TERIST

E

C

ICS

Output Swing vs Temperature

+

V 200 400

1 800 600 400 200

–

OUTPUT VOLTAGE REFERRED TO SUPPLIES (V)

V

–50

–25 25

0

TEMPERATURE (°C)

ON/OFF Response Time

6V 4V

V

OUT

V

OUT

ON/OFF

INPUT

2V

0 0

–2V

–4V –6V

5V

0

0 200µs 400µs

VIN = 0V

VIN = 5V

Slew Rate vs Temperature

20

I

= 2mA

OUT

I

= 10mA

OUT

I

= –10mA

OUT

I

= –2mA

OUT

125

50

100

75

150

LT1032 • TPC10

18 16 14 12 10

8

SLEW RATE (V/µs)

6

VS = ±12V

4

R

= 3k

L

= 51pF

C

L

2 0

–50

V

SLEW

–25

= ±8V

25

0

TEMPERATURE (°C)

FALLING

50

75

RISING

100

LT1032 • TPC11

125

ON/OFF Response Time

V

OUT

V

OUT

ON/OFF

INPUT

5V/DIV

10V

5V

0 0

–5V

–10V

5V

0

0 200µs 400µs

RL = 3k V

= ±12V

S

= 51pF

C

= 0V

V

IN

V

= 5V

IN

600µs

L

1ms

LT1032 • TPC13

OUTPUT HIGH

OUTPUT LOW

600µs

RL = 3k

= ±6V

V

S

C

= 51pF

L

1ms

LT1032 • TPC12

OUTPUT HIGH

OUTPUT LOW

INPUT

= ±12V

V

S

V

OUT

V

OUT

LOGIC INPUT

V

OUT

LOGIC INPUT

Output Waveform

50V

0

–5V

10V

0

–10V

5V

0

2µs4µs

Output Waveform Driving Capacitive Load

6V 4V 2V

0 –2V –4V –6V

5V

0

10µs20µs

6µs

30µs

RL = 3k C

= 51pF

L

8µs

LT1032 • TPC14

RL = 3.3k

= ±6V

V

S

= 0.01µF

C

L

40µs

LT1032 • TPC16

10µs

50µs

V

LOGIC INPUT

OUTPUT

STROBE

OUT

INPUT

Output Waveform

4V 2V

0 –2V –4V

5V

0

4µs8µs

Strobe Pin Response

5V/DIV

0

5V

0

2µs

0

VIN = 0V

4µs

12µs

6µs

RL = 450Ω

= ±5V

V

S

= 51pF

C

L

16µs

LT1032 • TPC15

RL = 3k

= ±12V

V

S

C

= 51pF

L

8µs

LT1032 • TPC17

20µs0

4

LT1032

U

PI

V (J & N: Pins 2, 5, 9, 12/S: Pins 2, 5, 11, 14): Logic

Input. Operates properly on TTL or CMOS levels. Output valid form (V– + 2V) ≤ VIN ≤ 15V. Connect to ground when not used.

(J & N: Pins 3, 6, 8, 11/S: Pins 3, 6, 10, 13): Output. Line

drive output.

ON/OFF (J, N & S: Pin 4): Shuts down entire circuit.

Cannot be left open. For “normally on” operation, connect to V+.

A

Application Hints

The LT1032 is exceptionally easy to use when compared to older drivers. Operating supply voltage can be as low as ±3V or as high as ±15V. Input levels are referred to ground.

The logic inputs are internally set at TTL levels. Outputs are valid for input voltages from 1V above V– to 25V. Driving the logic inputs to V– turns off the output stage. The ON/OFF control completely turns off all supply current of the LT1032. The levels required to drive the device on or off are set by internal emitter-based voltages. Since the current into the ON/OFF pin is so low, TTL or CMOS drivers have no problem controlling the device.

The strobe pin is not fully logic compatible. The impedance of the strobe pin is about 2kΩ to ground. Driving the strobe pin positive forces the output stages low–even if the device is shut off. Under worst case conditions, 3V minimum at 2mA are needed driving the strobe pin to insure strobing.

FUUC

(J, N & S: Pin 1): Minus Supply. Operates –2V to –15V.

EE

PPLICATI

TI

O

U S

U

O

S

I FOR ATIO

WU

U

GND (J, N & S: Pin 7): Ground. Ground must be more positive than V–.

Response Control (J & N: Pin 10/S: Pin 12): Allows limited change of slew rate. Leave open when not used.

Strobe (J & N: Pin 13/ S: Pin 15): Forces all outputs low. Drive with 3V.

VCC (J & N:Pin 14/S: Pin 15): Positive Supply. Operates 5V to 15V.

The response pin can be used to make some adjustment in slew rate. A resistor can be connected between the response pin and the power supplies to drive 50µA to 100µA into the pin. The response pin is a low impedance point operating at about 0.75V above ground. For supply voltage up to ±6V, current is turned off when the device is turned off. For higher supply voltages, a Zener should be connected in series with the resistor to limit the voltage applied to the response pin to 6V. Also, for temperatures above 100°C, using the response pin is not recommended. The leakage current into the response pin at high temperatures is excessive.

Outputs are well protected against shorts or externally applied voltage. Tested limits are ±30V, but the device can withstand external voltages up to breakdown of the transistors (typically about 50V). The LT1032 is usually immune to ESD up to 2500V on the outputs with no damage.

INPUT

PPLICATITYPICAL

1/4 LT1032

U

O

SA

Protecting Against More Than ±30V Output Overload

+

V

100Ω TO

1000Ω

–

V

TO LINE

LT1032 • TA03a

INPUT

1/4 LT1032

TO LINE

30V ZENERS

LT1032 • TA03b

5

LT1032

U

O

PPLICATITYPICAL

SA

Slew Rate Adjustment*FET Driver

80k

10V

†

15V

INCREASES

50µA

SLEW RATE

15V

50k

1/4 LT1032INPUT

5V

80k

–15V

TTL/CMOS Compatible Strobe

5V

TTL INPUT

10k

1/4

LT1032CSW

LT1032 PIN 10

LT1032 • TA04

*ABOUT 4V/ms CHANGE

†

ZENERS PREVENT LEAKAGE DURING SHUTDOWN

TO LT1032 STROBE

LT1032 • TA06

TTL INPUT

Phase Shift Oscillator

R

35 62 89

C CC

1/4

LT1032CSW

RR

OR OR

120k

–5V

Strobing with CMOS

ANY CMOS

GATE

1/4

LT1032CSW

120k

10V

DECREASES

50µA

SLEW RATE

–15V

†

TO PIN 13 OF LT1032

LT1032 • TA07

f =

LT1032 • TA09

LT1032 • TA05

1

3.3RC

6

CMOS INPUT

Operating from a Single 5V Supply

1

V

EE

12

7

1N4148

1/4 LT1032CN

GND

*LEVEL SHIFTING RESISTORS NEEDED FOR EACH INPUT

40k*

15k*

V

CC

ON/OFF

LT1032 • TA10

5V

14

4

11

OUTPUT

0.7V TO 4.8V

WW

SI PLIFIED SCHE ATIC

+

V

R10

R9

ON/OFF

GND

2k

Q9

Q8

R1

50k

R4 2k

Q1

–

V

600Ω

Q7

Q2

Q3

Q6

R5

Q5

Q4

R6

7.2k

R7

21.5k

Q10

R8 1k

Q13

Q12

Q11

R11 120Ω

Q15

LT1032

LOGIC INPUT

R18 5k

R17

7.5k

OUTPUT

Q37

R14

2k

D4

Q40

R16 3Ω

LT1032 • SS

1 OF 4

DRIVERS

Q32

Q29

Q28

Q30

C1 10pF

Q33

C2 3pF

Q36

D3

Q39

Q34

Q25

Q24 Q26

Q23

Q22

R13 2k

Q27

Q31

2k

STROBE

Q19

R12 30k

Q14

Q18

Q20

Q17

Q16

D1

D2

Q21

RESPONSE

TIME ADJ

PACKAGEDESCRIPTI

0.300 BSC

(0.762 BSC)

0.008 – 0.018

(0.203 – 0.457)

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

0.300 – 0.325

(7.620 – 8.255)

0.009 – 0.015

(0.229 – 0.381)

+0.035

0.325

–0.015

+0.889

8.255

()

–0.381

0° – 15°

0.020

(0.508)

MIN

0.045 – 0.065

(1.143 – 1.651)

0.130 ± 0.005

(3.302 ± 0.127)

0.125

(3.175)

MIN

U

Dimensions in inches (millimeters) unless otherwise noted.

O

J Package

14-Lead CERDIP (Narrow 0.300, Hermetic)

(LTC DWG # 05-08-1110)

0.005

0.200 (0.127)

(5.080)

MIN

0.015 – 0.060

(0.381 – 1.524)

0.100

(2.54)

0.014 – 0.026

(0.360 – 0.660)

BSC

N Package

14-Lead PDIP (Narrow 0.300)

(LTC DWG # 05-08-1510)

0.045 – 0.065

(1.143 – 1.651)

0.005

(0.125)

MIN

0.100

(2.54)

BSC

MAX

(0.635)

RAD TYP

0.125

(3.175)

MIN

0.065

(1.651)

TYP

0.018 ± 0.003

(0.457 ± 0.076)

0.025

14

1

0.255 ± 0.015* (6.477 ± 0.381)

*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)

0.785

(19.939)

MAX

11 891013

12

234

14

1213

31

2

56

0.770* (19.558)

MAX

11

5

4

7

6

0.220 – 0.310

(5.588 – 7.874)

J14 1298

8910

7

N14 1098

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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

7

LT1032

TYPICAL APPLICATION

U

±5V to ±15V Voltage Multiplier

5V

14

LT1032

f

= 1kHz

CLK

5V 0V

12

PACKAGEDESCRIPTI

2

5

9

3

470µF

6

8

+

11

1

–5V

U

Dimensions in inches (millimeters) unless otherwise noted.

O

SW Package

16-Lead Plastic Small Outline (Wide 0.300)

(LTC DWG # 05-08-1620)

470µF

1N4148

+

1N4148

V

13.7V AT NO LOAD 12V AT 10mA

470µF

–V –13.7V AT NO LOAD –12V AT 10mA

470µF

+

OUT

LT1032 • TA08

0.291 – 0.299** (7.391 – 7.595)

° – 8° TYP

0

0.093 – 0.104

(2.362 – 2.642)

0.050

(1.270)

BSC

0.014 – 0.019

(0.356 – 0.482)

TYP

0.010 – 0.029

(0.254 – 0.737)

0.009 – 0.013

(0.229 – 0.330)

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

**

NOTE 1

× 45°

0.016 – 0.050

(0.406 – 1.270)

0.037 – 0.045

(0.940 – 1.143)

0.004 – 0.012

(0.102 – 0.305)

NOTE 1

0.398 – 0.413*

(10.109 – 10.490)

15 1413121110 9

16

2345

1

6

78

0.394 – 0.419

(10.007 – 10.643)

S16 (WIDE) 1098

RELATED PARTS

PART NUMBER DESCRIPTION COMMENTS

LT1039A Triple RS232 Driver/Receiver with Shutdown ±15kV ESD Protection LT1130A/LT1140A 5V Supply, Multiple RS232 Driver/Receiver ±15kV 3 Driver/5 Receiver (LT1137A) LT1780/LT1781A 5V Supply, 2 Driver/2 Receiver RS232 ±15kV Pin Compatible Upgrade to LT1080/LT1081 and LT1180A/LT1181A

1032fd LT/TP 0999 2K REV D • PRINTED IN USA

 LINEAR TECHNOLOGY CORPORATION 1994

8

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ● FAX: (408) 434-0507

●

www.linear-tech.com

Datasheet LT1032 Datasheet (Linear Technology)

Specifications and Main Features

Frequently Asked Questions

User Manual