1

LTC1386

3.3V Low PowerEIA/TIA562 Transceiver

SFEATURE D

U

ESCRIPTIO Operates from a Single 3.3V Supply Low Supply Current: ICC = 200µA 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

Back into Supplies EIA/TIA562 I/O Lines Can Be Forced to ±25V

Without Damage Pin Compatible with LT1181A

The LTC1386 is an ultra-low power 2-driver/2-receiverEIA/TIA562 transceiver that operates from a single3.3V supply. The charge pump requires only fourspace-saving 0.1µF capacitors. The supply current(ICC) of the transceiver is only 200µA with driver out-puts unloaded.

The LTC1386 is fully compliant with all data rate andovervoltage EIA/TIA562 specifications. The transceivercan operate up to 120kbaud with a 1000pF, 3kΩ load.Both driver outputs and receiver inputs can be forced to±25V without damage and can survive multiple ±10kVESD strikes.U

SA

O

PPLICATI Notebook Computers Palmtop Computers

U

A

O

PPLICATITYPICALQuiescent Supply Current vs Temperature

LTC1386 • TA01

LTC1386

1

30.1µF

16VCC = 3.3V

2

0.1µF6

0.1µF0.1µF

4

5

562 OUTPUT14

7562 OUTPUT

13562 INPUT

5k

8562 INPUT

15

11

10

12

9

LOGIC INPUT

LOGIC INPUT

LOGIC OUTPUT

LOGIC OUTPUT5k

300kVCC

300kVCC

TEMPERATURE (°C)–20

0

QUIE

SCEN

T CU

RREN

T (µ

A)

100

200

300

400

600

0 20 40 60

LTC1386 • TA02

80

500

TEST CONDITION: VCC = 3.3V

QUIESCENT CURRENT

2

LTC1386

A

U

G

W

A

W

U

W

ARBSOLUTE XI TI S

WU U

PACKAGE/ORDER I FOR ATIOSupply Voltage (VCC) ................................................ 5VInput Voltage

Driver ....................................... –0.3V to VCC + 0.3VReceiver ............................................... – 25V to 25VDigital Input ............................... –0.3V to VCC + 0.3V

Output VoltageDriver .................................................... – 25V to 25VReceiver .................................... – 0.3V to VCC + 0.3V

Short-Circuit DurationV+ ................................................................... 30 secV– ................................................................... 30 secDriver Output .............................................. IndefiniteReceiver Output .......................................... Indefinite

Operating Temperature Range .................... 0°C to 70°CStorage Temperature Range ................ – 65°C to 150°CLead Temperature (Soldering, 10 sec)................. 300°C

ORDER PARTNUMBER

LTC1386CNLTC1386CS

ELECTRICAL C CHARA TERISTICSCD

TJMAX = 125°C, θJA = 65°C/W (N)TJMAX = 125°C, θJA = 95°C/W (S)

1

2

3

4

5

6

7

8

TOP VIEW

S PACKAGE 16-LEAD NARROW

PLASTIC SOIC

16

15

14

13

12

11

10

9

C1+

V+

C1–

C2+

C2–

V–

TR2 OUT

RX2 IN

VCC

GND

TR1 OUT

RX1 IN

RX1 OUT

TR1 IN

TR2 IN

RX2 OUT

N PACKAGE 16-LEAD PLASTIC DIP

Consult factory for Industrial and Military grade parts.

VCC = 3.3V, C1 = C2 = C3 = C4 = 0.1µF, unless otherwise noted.

PARAMETER CONDITIONS MIN TYP MAX UNITS

Any DriverOutput Voltage Swing 3k to GND Positive 3.7 4.5 V

Negative –3.7 – 4.5 VLogic Input Voltage Level Input Low Level (VOUT = High) 1.4 0.8 V

Input High Level (VOUT = Low) 2.0 1.4 VLogic Input Current VIN = VCC 5 µA

VIN = 0V –20 –40 µAOutput Short-Circuit Current VOUT = 0V ±10 mAAny ReceiverInput Voltage Thresholds Input Low Threshold 0.8 1.3 V

Input High Threshold 1.7 2.4 VHysteresis 0.1 0.4 1 VInput Resistance –10V ≤ VIN ≤ 10V 3 5 7 kΩOutput Voltage Output Low, IOUT = – 1.6mA (VCC = 3.3V) 0.2 0.4 V

Output High, IOUT = 160µA (VCC = 3.3V) 3.0 3.2 VOutput Short-Circuit Current Sinking Current, VOUT = VCC –5 –20 mA

Sourcing Current, VOUT = GND 2 7 mAPower Supply GeneratorV+ Output Voltage IOUT = 0mA 5.7 V

IOUT = 5mA 5.5 VV– Output Voltage IOUT = 0mA –5.3 V

IOUT = –5mA –5.0 VPower SupplyVCC Supply Current No Load (Note 2) 0.2 0.5 mA

3

LTC1386

The denotes specifications which apply over the operating temperaturerange of 0°C ≤ TA ≤ 70°C.Note 1: Absolute maximum ratings are those values beyond which the lifeof the device may be impaired.

C CHARA TERISTICSACPARAMETER CONDITIONS MIN TYP MAX UNITSSlew Rate RL = 3k, CL = 51pF 8 30 V/µs

RL = 3k, CL = 1000pF 3 5 V/µsDriver Propagation Delay tHLD (Figure 1) 2 3.5 µs(TTL to EIA/TIA562) tLHD (Figure 1) 2 3.5 µsReceiver Propagation Delay tHLR (Figure 2) 0.3 0.8 µs(EIA/TIA562 to TTL ) tLHR (Figure 2) 0.3 0.8 µs

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

VCC = 3.3V, C1 = C2 = C3 = C4 = 0.1µF, unless otherwise noted.

TYPICAL PERFORMANCE CHARACTERISTICS

UWDATA RATE (kBAUD)

0

SUPP

LY C

URRE

NT (m

A)

60

LTC1386 • TPC03

10

5

20 40 800

20

15

100 120 140

VCC = 3.3V RL = 3k CL = 2500pF ALL DRIVERS ACTIVE

Supply Current vs Data Rate

TEMPERATURE (˚C)0

THRE

SHOL

D VO

LTAG

E (V

)

1.8

2.0

2.2

30

VTH+

VTH–

50

LTC1386 • TPC02

1.6

1.4

10 20 40 60 70

1.2

1.0

Receiver Input Thresholdsvs Temperature

Receiver Output WaveformsDriver Output WaveformsDRIVER

OUTPUTRL = 3k

CL = 1000pF

DRIVEROUTPUTRL = 3k

INPUT

RECEIVEROUTPUT

CL = 51pF

INPUT

LTC1386 • TPC05 LTC1386 • TPC06

TEMPERATURE (°C)0

0

SUPP

LY C

URRE

NT (m

A)

0.5

1.5

2.0

2.5

40

4.5

LTC1386 • TPC04

1.0

2010 50 6030 70

3.0

3.5

4.0

2 DRIVERS LOADED RL = 3k

1 DRIVER LOADED RL = 3k

VCC Supply Currentvs Temperature

TEMPERATURE (°C)0

–5

DRIV

ER O

UTPU

T VO

LTAG

E (V

)

–4

–2

–1

0

5

2

20 40 50

LTC1386 • TPC01

–3

3

4

1

10 30 60 70

OUTPUT HIGH VCC = 3.3V

OUTPUT LOW VCC = 3.3V

ALL DRIVERS WITH LOAD RL = 3k

Driver Output Voltagevs Temperature

4

LTC1386

PI FU CTIO S

U UU

VCC: 3.3V Input Supply Pin. This pin should be decoupledwith a 0.1µF ceramic capacitor.GND: Ground Pin.V+: Positive Supply Output (EIA/TIA562 Drivers). V+ ≅2VCC – 1V. This pin requires an external capacitor C =0.1µF for charge storage. The capacitor may be tied toground or VCC. With multiple devices, the V + and V – pinsmay share a common capacitor. For large numbers ofdevices, increasing the size of the shared common storagecapacitors is recommended to reduce ripple.V–: Negative Supply Output (RS232 Drivers). V – ≅ – (2VCC– 1.3V). This pin requires an external capacitor C = 0.1µFfor charge storage.C1+, C1–, C2+, C2–: Commutating Capacitor Inputs. Thesepins require two external capacitors C = 0.1µF: one fromC1+ to C1– and another from C2+ to C2 –. To maintain

charge pump efficiency, the capacitor’s effective seriesresistance should be less than 2Ω.TR IN: EIA/TIA562 Driver Input Pins. Inputs are TTL/CMOS compatible. The inputs of unused drivers can be leftunconnected since 300k input pull-up resistors to VCC areincluded on chip.TR OUT: Driver Outputs at EIA/TIA562 Voltage Levels.The driver outputs are protected against ESD to ±10kV forhuman body model discharges.RX IN: Receiver Inputs. These pins can be forced to ±25Vwithout damage. The receiver inputs are protected againstESD to ±10kV for human body model discharges. Eachreceiver provides 0.4V of hysteresis for noise immunity.

RX OUT: Receiver Outputs with TTL/CMOS VoltageLevels.

Figure 1. Driver Propagation Delay Timing Figure 2. Receiver Propagation Delay Timing

SWITCHI G TI E WAVEFOR SW WU

1.4V

0V

VCC

0V

V+

V–0V

DRIVER INPUT

DRIVER OUTPUT

1.4V

t HLDt LHD

LTC1386 • F01

0.8V

VCC

0V

2.4V

RX INPUT

RX OUTPUT

1.3V

t HLR

1.7V

t LHR

LTC1386 • F02

VCC

0V

5

LTC1386

Driver Timing Test Load

TEST CIRCUITS

Receiver Timing Test Load

DRIVERDRIVER INPUT

3k51pF

DRIVER OUTPUT

LTC1386 • TA03

RXRX INPUT

51pF

RX OUTPUT

LTC1386 • TA04

ESD Test Circuit

1386 TA05

0.1µF

0.1µF

0.1µF 0.1µF

LTC13861

3

4

5

11

10

12

9

13

8

15

LOGIC INPUT

LOGIC INPUT

LOGIC OUTPUT

LOGIC OUTPUT

16

2

6

14

562 OUTPUT

RS562 LINE PINS PROTECTED TO ±10kV

VCC

562 OUTPUT

562 INPUT

562 INPUT5k

5k

300kVCC

300kVCC

7

6

LTC1386

TYPICAL APPLICATIONS N

U

Paralleling Power Supply Generatorwith Common Storage Capacitors

LTC1386

1

30.1µF

16

2

0.1µF6

0.1µF0.1µF

4

5

562 OUTPUT14

7562 OUTPUT

13562 INPUT

5k

8562 INPUT

15

11

10

12

9

LOGIC INPUT

LOGIC INPUT

LOGIC OUTPUT

LOGIC OUTPUT5k

300kVCC

300kVCC

LTC1386 • TA06

LTC1386

1

30.1µF

16VCC = 3.3VVCC = 3.3V

2

6

0.1µF

4

5

562 OUTPUT14

7562 OUTPUT

13562 INPUT

5k

8562 INPUT

15

11

10

12

9

LOGIC INPUT

LOGIC INPUT

LOGIC OUTPUT

LOGIC OUTPUT5k

300kVCC

300kVCC

7

LTC1386

PACKAGE DESCRIPTION

U

Dimensions in inches (millimeters) unless otherwise noted.

0.016 – 0.050 0.406 – 1.270

0.010 – 0.020 (0.254 – 0.508)

× 45°

0° – 8° TYP0.008 – 0.010

(0.203 – 0.254)

1 2 3 4 5 6 7 8

0.150 – 0.157* (3.810 – 3.988)

16 15 14 13

0.386 – 0.394* (9.804 – 10.008)

0.228 – 0.244 (5.791 – 6.197)

12 11 10 9

SO16 0893

0.053 – 0.069 (1.346 – 1.752)

0.014 – 0.019 (0.355 – 0.483)

0.004 – 0.010 (0.101 – 0.254)

0.050 (1.270)

TYP

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

N Package16-Lead Plastic DIP

N16 0492

0.260 ± 0.010 (6.604 ± 0.254)

0.770 (19.558)

MAX

16

1 2 3 4 5 6 7 8

9101112131415

0.015 (0.381)

MIN

0.125 (3.175)

MIN

0.130 ± 0.005 (3.302 ± 0.127)

0.065 (1.651)

TYP

0.045 – 0.065 (1.143 – 1.651)

0.018 ± 0.003 (0.457 ± 0.076)

0.045 ± 0.015 (1.143 ± 0.381)

0.100 ± 0.010 (2.540 ± 0.254)

0.009 – 0.015 (0.229 – 0.381)

0.300 – 0.325 (7.620 – 8.255)

0.325+0.025 –0.015+0.635 –0.3818.255( )

S Package16-Lead Plastic SOIC

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

8

LTC1386

Linear Technology Corporation1630 McCarthy Blvd., Milpitas, CA 95035-7487(408) 432-1900 FAX: (408) 434-0507 TELEX: 499-3977 LINEAR TECHNOLOGY CORPORATION 1994

LT/GP 0594 10K • PRINTED IN USA

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

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U.S. Area Sales Offices

SOUTHEAST REGIONLinear Technology Corporation17060 Dallas ParkwaySuite 208Dallas, TX 75248Phone: (214) 733-3071FAX: (214) 380-5138

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World Headquarters

Linear Technology Corporation1630 McCarthy Blvd.Milpitas, CA 95035-7487Phone: (408) 432-1900FAX: (408) 434-0507

0294

International Sales Offices