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LTC1386

1386fa

3.3V Low Power

EIA/TIA562 Transceiver

■

Operates from a Single 3.3V Supply

■

Low Supply Current: I

= 200µA

■

ESD Protection Over ±10kV

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Available in 16-Pin SOIC Narrow Package

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Uses Small Capacitors: 0.1µF

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Operates to 120kBaud

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Output Overvoltage Does Not Force Current

Back into Supplies

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

Without Damage

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Pin Compatible with LT1181A

The LTC

1386 is an ultra-low power 2-driver/2-re-

ceiver EIA/TIA562 transceiver that operates from a

single 3.3V supply. The charge pump requires only four

space-saving 0.1µF capacitors. The supply current

) of the transceiver is only 200µA with driver out-

puts unloaded.

The LTC1386 is fully compliant with all data rate and

overvoltage EIA/TIA562 specifications. The transceiver

can 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 ±10kV

ESD strikes.

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Notebook Computers

■

Palmtop Computers

Quiescent Supply Current vs Temperature

TEMPERATURE (°C)

–20

QUIESCENT CURRENT (µA)

100

200

300

400

600

20 40 60

LTC1386 • TA02

500

TEST CONDITION: V

= 3.3V

QUIESCENT

CURRENT

FEATURES

DESCRIPTIO

APPLICATIO S

TYPICAL APPLICATIO

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

LTC1386 • TA01

LTC1386

0.1µF

= 3.3V

0.1µF

562 OUTPUT

562 INPUT

LOGIC INPUT

LOGIC OUTPUT

300k

Summary of content (8 pages)

PAGE 1
LTC1386 3.3V Low Power EIA/TIA562 Transceiver U FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ DESCRIPTIO The LTC®1386 is an ultra-low power 2-driver/2-receiver EIA/TIA562 transceiver that operates from a single 3.3V supply. The charge pump requires only four space-saving 0.1µF capacitors. The supply current (ICC) of the transceiver is only 200µA with driver outputs unloaded. Operates from a Single 3.
PAGE 2
LTC1386 W W W AXI U U ABSOLUTE RATI GS Supply Voltage (VCC) ................................................ 5V Input Voltage Driver ....................................... – 0.3V to V CC + 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.
PAGE 3
LTC1386 AC CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature range. VCC = 3.3V, C1 = C2 = C3 = C4 = 0.1µF, unless otherwise noted.
PAGE 4
LTC1386 U U U PI FU CTIO S VCC: 3.3V Input Supply Pin. This pin should be decoupled with a 0.1µF ceramic capacitor. charge pump efficiency, the capacitor’s effective series resistance should be less than 2Ω. GND: Ground Pin. TR IN: EIA/TIA562 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. V +: V+ Positive Supply Output (EIA/TIA562 Drivers). ≅ 2VCC – 1V.
PAGE 5
LTC1386 TEST CIRCUITS Receiver Timing Test Load Driver Timing Test Load DRIVER INPUT RX OUTPUT DRIVER OUTPUT RX INPUT DRIVER 51pF RX 51pF 3k LTC1386 • TA04 LTC1386 • TA03 ESD Test Circuit 16 1 0.1µF LTC1386 3 LOGIC INPUT 5 VCC LOGIC OUTPUT LOGIC OUTPUT 0.1µF 300k 14 11 VCC LOGIC INPUT 0.1µF 562 OUTPUT 300k 10 7 12 13 9 VCC 6 4 0.
PAGE 6
LTC1386 U TYPICAL APPLICATIO S Paralleling Power Supply Generator with Common Storage Capacitors 0.1µF 1 16 3 2 4 0.1µF LOGIC INPUT 5 LTC1386 VCC = 3.3V 0.1µF 6 0.1µF VCC 300k 14 11 0.1µF 562 OUTPUT 1 16 3 2 4 0.1µF LOGIC INPUT 5 LOGIC OUTPUT LOGIC OUTPUT 6 VCC 300k 11 VCC 300k LOGIC INPUT LTC1386 VCC = 3.
PAGE 7
LTC1386 U PACKAGE DESCRIPTIO S Package 16-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) .386 – .394 (9.804 – 10.008) NOTE 3 .045 ±.005 .050 BSC 16 N 15 14 13 12 11 10 9 N .245 MIN .160 ±.005 .150 – .157 (3.810 – 3.988) NOTE 3 .228 – .244 (5.791 – 6.197) 1 .030 ±.005 TYP 2 3 N/2 N/2 RECOMMENDED SOLDER PAD LAYOUT 1 .010 – .020 × 45° (0.254 – 0.508) 2 3 4 5 6 .053 – .069 (1.346 – 1.752) .008 – .010 (0.203 – 0.254) NOTE: 1. DIMENSIONS IN .014 – .
PAGE 8
LTC1386 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1780/LT1781 5V, 2 Driver, 2 Receiver RS232 Transeivers ±15kV ESD per IEC 1000-4 LTC1327 3.3V, 3 Driver, 5 Receiver RS562 Transceiver 300µA Supply Current, 0.2µA in Shutdown LTC1348 3.3V to 5V, 3 Driver, 5 Receiver RS232 Transceiver True RS232 on 3.3V, 5 Receivers Active in Shutdown LTC1382 5V, 2 Driver, 2 Receiver RS232 Transceiver 220µA Supply Current, 0.