Datasheet LTC1383 Datasheet (Linear Technology)

LTC1383

TEMPERATURE (°C)

–20

0

QUIESCENT CURRENT (µA)

100

200

300

400

600

0

20 40 60

LTC1383 • TA02

80

500

TEST CONDITION: VCC = 5V

QUIESCENT

CURRENT

5V Low Power

RS232 Transceiver

EATU

F

■

Operates from a Single 5V Supply

■

Low Supply Current: I

■

ESD Protection Over ±10kV

■

Available in 16-Pin SOIC Narrow Package

■

Uses Small Capacitors: 0.1µF

■

Operates to 120kBaud

■

Output Overvoltage Does Not Force Current

RE

S

= 220µA

CC

Back into Supplies

■

RS232 I/O Lines Can Be Forced to ±25V Without Damage

■

Pin Compatible with LT1181A and MAX232A

U

O

PPLICATI

A

■

Notebook Computers

■

Palmtop Computers

A

S

U

O

PPLICATITYPICAL

DUESCRIPTIO

The LTC1383 is an ultra-low power 2-driver/2-receiver RS232 transceiver that operates from a single 5V supply. The charge pump requires only four spacesaving 0.1µ F capacitors. The supply current (ICC) of the transceiver is only 220µ A with driver outputs unloaded.

The LTC1383 is fully compliant with all data rate and overvoltage RS232 specifications. The transceiver can operate up to 120kbaud with a 2500pF, 3kΩ load. Both driver outputs and receiver inputs can be forced to ± 25V without damage and can survive multiple ±10kV ESD strikes.

0.1µF

LOGIC INPUT

LOGIC OUTPUT

1 3

4 5

11

10

12

9

V

CC

300k

V

CC

300k

LTC1383

5k

LTC1383 • TA01

16 2

6

14

7

13

8

15

= 5V

V

CC

0.1µF

232 OUTPUT

232 INPUT

Quiescent Supply Current vs Temperature

0.1µF

1

LTC1383

WU

U

PACKAGE

/

O

RDER I FOR ATIO

A

W

O

LUTEXI T

S

A

WUW

ARB

U G

I

S

Supply Voltage (VCC) ................................................ 6V

Input Voltage

Driver ....................................... –0.3V to VCC + 0.3V

Receiver ............................................... – 25V to 25V

Digital Input............................... –0.3V to VCC + 0.3V

Output Voltage

Driver .................................................... –25V to 25V

Receiver .................................... – 0.3V to VCC + 0.3V

Short-Circuit Duration

V+................................................................... 30 sec

V–................................................................... 30 sec

Driver Output.............................................. Indefinite

Receiver Output.......................................... Indefinite

Operating Temperature Range .................... 0°C to 70°C

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

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

TOP VIEW

+

1

C1



+

2

V



–

3

C1



+

4

C2



–

5

C2



–

6

V



RX2 IN

N PACKAGE

T T

7 8



16-LEAD NARROW

= 125°C, θJA = 65°C/W (N)

JMAX

= 125°C, θJA = 95°C/W (S)

JMAX

TR2 OUT

16-LEAD PLASTIC DIP

Consult factory for Industrial and Military grade products.

V

16

CC

GND

15

TR1 OUT

14

RX1 IN

13

RX1 OUT

12

TR1 IN

11

TR2 IN

10

RX2 OUT

9



S PACKAGE

PLASTIC SOIC



NUMBER

LTC1383CN LTC1383CS

ORDER PART

LECTRICAL C CHARA TERIST

E

PARAMETER CONDITIONS MIN TYP MAX UNITS Any Driver

Output Voltage Swing 3k to GND Positive

Logic Input Voltage Level Input Low Level (V

Input High Level (V

Logic Input Current V

Output Short-Circuit Current V

Any Receiver

Input Voltage Thresholds Input Low Threshold ● 0.8 1.3 V

Hysteresis ● 0.1 0.4 1 V Input Resistance –10V ≤ VIN ≤ 10V 3 5 7 kΩ Output Voltage Output Low, I

Output Short-Circuit Current Sinking Current, V

Power Supply Generator

+

V

Output Voltage I

V– Output Voltage I

= V

IN

CC

VIN = 0V ● –20 –40 µA

= 0V ±12 mA

OUT

Input High Threshold ● 1.7 2.4 V

Output High, I

Sourcing Current V

= 0mA 8.0 V

OUT

I

= 8mA 7.5 V

OUT

= 0mA –8.0 V

OUT

I

= –8mA –7.0 V

OUT

ICSCD

= High) ● 1.4 0.8 V

OUT

= Low) ● 2.0 1.4 V

OUT

= – 1.6mA (VCC = 5V) ● 0.2 0.4 V

= 160µA (VCC = 5V) ● 3.0 3.2 V

= V

OUT

= 0V 10 20 mA

OUT

VCC = 5V, C1 = C2 = C3 = C4 = 0.1µF, unless otherwise noted.

● 5.0 7.0 V

Negative ● – 5.0 – 6.5 V

● 5 µA

CC

–15 – 40 mA

2

LTC1383

LECTRICAL C CHARA TERIST

E

PARAMETER CONDITIONS MIN TYP MAX UNITS Power Supply

VCC Supply Current No Load (Note 2) ● 0.22 0.5 mA Digital Input Threshold Low ● 1.4 0.8 V Digital Input Threshold High ● 2.0 1.4 V

ICSCD

VCC = 5V, C1 = C2 = C3 = C4 = 0.1µF, unless otherwise noted.

CCHARA TERIST

AC

ICS

VCC = 5V, C1 = C2 = C3 = C4 = 0.1µF, unless otherwise noted.

PARAMETER CONDITIONS MIN TYP MAX UNITS

Slew Rate R

= 3k, CL = 51pF 8 30 V/µs

L

RL = 3k, CL = 2500pF 3 5 V/µs

Driver Propagation Delay t (TTL to RS232) t

Receiver Propagation Delay t (RS232 to TTL) t

The ● denotes specifications which apply over the operating temperature range of 0°C ≤ T

≤ 70°C.

A

(Figure 1) ● 2 3.5 µs

HLD

(Figure 1) ● 2 3.5 µs

LHD

(Figure 2) ● 0.3 0.8 µs

HLR

(Figure 2) ● 0.3 0.8 µs

LHR

Note 2: Supply current is measured with driver and receiver outputs unloaded.

Note 1: Absolute maximum ratings are those values beyond which the life of the device may be impaired.

W

U

TYPICAL PERFORMANCE CHARACTERISTICS

Driver Output Voltage vs Temperature

10

RL = 3k

8

6

4

2

0

–2

–4

DRIVER OUTPUT VOLTAGE (V)

–6

–8

0

20

10

TEMPERATURE (°C)

30 70

OUTPUT HIGH

= 5V

V

CC

V

= 4.5V

CC

OUTPUT LOW

VCC = 4.5V

VCC = 5V

50 60

40

LTC1383 • TPC01

Receiver Input Thresholds vs Temperature

2.2

2.0

1.8

1.6

1.4

THRESHOLD VOLTAGE (V)

1.2

1.0 0

10 20

30 50

TEMPERATURE (˚C)

V

TH

V

TL

40 60 70

LTC1383 • TPC02

Supply Current vs Data Rate

45

VCC = 5V

= 3k

R

40

L

= 2500pF

C

L

35

2 DRIVERS ACTIVE

30

25

20

15

SUPPLY CURRENT (mA)

10

5

0

50

25

DATA RATE (kBAUD)

75 150 175

100

125

LTC1383 • TPC03

3

LTC1383

W

U

TYPICAL PERFORMANCE CHARACTERISTICS

VCC Supply Current vs Temperature

18

16

14

12

10

8

6

SUPPLY CURRENT (mA)

4

2

0

20

10

TEMPERATURE (°C)

2 DRIVERS LOADED

= 3k

R

L

1 DRIVER LOADED

R

= 3k

L

30 60 70

50

40

LTC1383 • TPC04

C

= 2500pF

L

Driver Output Waveforms Receiver Output Waveforms

DRIVER

OUTPUT

R

= 3k

L

DRIVER

OUTPUT

R

= 3k

L

INPUT

LTC1383 • TPC05

RECEIVER

OUTPUT

C

= 51pF

L

INPUT

LTC1383 • TPC06

U

UU

PI FU CTIO S

VCC: 5V Input Supply Pin. This pin should be decoupled with a 0.1µF ceramic capacitor.

GND: Ground Pin. V+: Positive Supply Output (RS232 Drivers). V

2V. This pin requires an external capacitor C = 0.1µF for charge storage. The capacitor may be tied to ground or VCC. With multiple devices, the V+ and V– pins may share a common capacitor. For large numbers of devices, increasing the size of the shared common storage capacitors is recommended to reduce ripple.

V–: Negative Supply Output (RS232 Drivers). V – 2V). This pin requires an external capacitor C = 0.1µ F for charge storage.

C1+, C1–, C2+, C2–: Commutating Capacitor Inputs. These pins require two external capacitors C = 0.1µF: one from C1+ to C1– and another from C2+ to C2–. To maintain

+

≅ 2VCC –

–

≅ – (2V

CC

charge pump efficiency, the capacitor’s effective series resistance should be less than 2Ω.

TR IN: RS232 Driver Input Pins. Inputs are TTL/CMOS compatible. The inputs of unused drivers can be left unconnected since 300k input pull-up resistors to VCC are included on chip.

TR OUT: Driver Outputs at RS232 Voltage Levels. The driver outputs are protected against ESD to ±10kV for human body model discharges.

RX IN: Receiver Inputs. These pins can be forced to ±25V without damage. The receiver inputs are protected against ESD to ±10kV for human body model discharges. Each receiver provides 0.4V of hysteresis for noise immunity.

RX OUT: Receiver Outputs with TTL/CMOS Voltage Levels.

4

WWU

SWITCHI G TI E WAVEFOR S

LTC1383

DRIVER

INPUT

DRIVER

OUTPUT

1.4V



0V



t

LHD

Figure 1. Driver Propagation Delay Timing

TEST CIRCUITS

Driver Timing Test Load

DRIVER

INPUT

DRIVER

DRIVER

OUTPUT

51pF

LTC1383 • TA03

1.4V

2.4V

LTC1383 • F02

V

CC

0V

V

CC

0V

V

CC

0V

+

V

0V

–

t

HLD

V

LTC1383 • F01

RX

INPUT

RX

OUTPUT



t

LHR

1.7V

0.8V

1.3V

t

HLR

Figure 2. Receiver Propagation Delay Timing

Receiver Timing Test Load

RX

RX INPUT

3k

RX

OUTPUT

51pF

LTC1383 • TA04

0.1µF

LOGIC INPUT

LOGIC OUTPUT

ESD Test Circuit

1 3

LTC1383

4 5

V

CC

300k

11

V

CC

300k

10

12

9

5k

LTC1383 • TA05

16 2

6

14

7

13

8

15

V

CC

0.1µF

232 OUTPUT

232 INPUT

0.1µF

RS232 LINE PINS  PROTECTED TO ±10kV

5

LTC1383

U

TYPICAL APPLICATIONS N

Paralleling Power Supply Generator

with Common Storage Capacitors

1

0.1µF

LOGIC INPUT

LOGIC OUTPUT

3

LTC1383

4 5

V

CC

300k

11

V

CC

300k

10

12

5k

9

5k

PACKAGE DESCRIPTION

16 2

6

14

7

13

8

15

= 5V

CC

0.1µF

232 OUTPUT

232 INPUT

0.1µF

LOGIC INPUT

LOGIC OUTPUT

1 3

LTC1383

4 5

V

CC

300k

11

V

CC

300k

10

12

5k

9

5k

LTC1383 • TA06

U

Dimensions in inches (millimeters) unless otherwise noted.

N Package

16-Lead Plastic DIP

16 2

6

14

7

13

8

15

= 5VV

V

CC

232 OUTPUT

232 INPUT

14

15

16

0.260 ± 0.010

(6.604 ± 0.254)

2

1

0.300 – 0.325

(7.620 – 8.255)

0.009 – 0.015

(0.229 – 0.381)

+0.025

0.325

–0.015

+0.635

8.255

()

–0.381

0.015

(0.381)

MIN

0.130 ± 0.005

(3.302 ± 0.127)

0.125

(3.175)

MIN

0.100 ± 0.010

(2.540 ± 0.254)

3

0.045 ± 0.015

(1.143 ± 0.381)

0.770

(19.558)

MAX

12

13

4

5

0.045 – 0.065

(1.143 – 1.651)

7

(0.457 ± 0.076)

910

8

0.065

(1.651)

TYP

0.018 ± 0.003

N16 0492

11

6

PACKAGE DESCRIPTION

U

Dimensions in inches (millimeters) unless otherwise noted.

S Package

16-Lead Plastic SOIC

0.386 – 0.394*

(9.804 – 10.008)

13

16

14

15

12

11 10

LTC1383

9

(0.254 – 0.508)

0.008 – 0.010

(0.203 – 0.254)

0.010 – 0.020

0.016 – 0.050

0.406 – 1.270

× 45°

0° – 8° TYP

0.228 – 0.244

(5.791 – 6.197)

4

5

0.050

(1.270)

TYP

6

3

2

1

0.053 – 0.069

(1.346 – 1.752)

0.014 – 0.019

(0.355 – 0.483)

*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006 INCH (0.15mm).

0.150 – 0.157* (3.810 – 3.988)

7

8

0.004 – 0.010

(0.101 – 0.254)

SO16 0893

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

LTC1383

U.S. Area Sales Offices

NORTHEAST REGION Linear Technology Corporation

One Oxford Valley 2300 E. Lincoln Hwy.,Suite 306 Langhorne, PA 19047 Phone: (215) 757-8578 FAX: (215) 757-5631

Linear Technology Corporation

266 Lowell St., Suite B-8 Wilmington, MA 01887 Phone: (508) 658-3881 FAX: (508) 658-2701

FRANCE Linear Technology S.A.R.L.

Immeuble "Le Quartz" 58 Chemin de la Justice 92290 Chatenay Malabry France Phone: 33-1-41079555 FAX: 33-1-46314613

SOUTHEAST REGION Linear Technology Corporation

17060 Dallas Parkway Suite 208 Dallas, TX 75248 Phone: (214) 733-3071 FAX: (214) 380-5138

CENTRAL REGION Linear Technology Corporation

Chesapeake Square 229 Mitchell Court, Suite A-25 Addison, IL 60101 Phone: (708) 620-6910 FAX: (708) 620-6977

International Sales Offices

KOREA Linear Technology Korea Branch

Namsong Building, #505 Itaewon-Dong 260-199 Yongsan-Ku, Seoul Korea Phone: 82-2-792-1617 FAX: 82-2-792-1619

SOUTHWEST REGION Linear Technology Corporation

22141 Ventura Blvd. Suite 206 Woodland Hills, CA 91364 Phone: (818) 703-0835 FAX: (818) 703-0517

NORTHWEST REGION Linear Technology Corporation

782 Sycamore Dr. Milpitas, CA 95035 Phone: (408) 428-2050 FAX: (408) 432-6331

TAIWAN Linear Technology Corporation

Rm. 801, No. 46, Sec. 2 Chung Shan N. Rd. Taipei, Taiwan, R.O.C. Phone: 886-2-521-7575 FAX: 886-2-562-2285

GERMANY Linear Techonolgy GmbH

Untere Hauptstr. 9 D-85386 Eching Germany Phone: 49-89-3197410 FAX: 49-89-3194821

JAPAN Linear Technology KK

5F YZ Bldg. 4-4-12 Iidabashi, Chiyoda-Ku Tokyo, 102 Japan Phone: 81-3-3237-7891 FAX: 81-3-3237-8010

SINGAPORE Linear Technology Pte. Ltd.

101 Boon Keng Road #02-15 Kallang Ind. Estates Singapore 1233 Phone: 65-293-5322 FAX: 65-292-0398

World Headquarters

Linear Technology Corporation

1630 McCarthy Blvd. Milpitas, CA 95035-7487 Phone: (408) 432-1900 FAX: (408) 434-0507

UNITED KINGDOM Linear Technology (UK) Ltd.

The Coliseum, Riverside Way Camberley, Surrey GU15 3YL United Kingdom Phone: 44-276-677676 FAX: 44-276-64851

0294

8

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7487

(408) 432-1900

●

FAX

: (408) 434-0507

●

TELEX

: 499-3977

LT/GP 0594 10K • PRINTED IN USA

 LINEAR TECHNOLOGY CORPORATION 1994