LTC485CJ8 datasheet(2/12 Pages) LINER

Part #	LTC485CJ8

Description	Low Power RS485 Interface Transceiver

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Manufacturer	LINER [Linear Technology]

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LTC485

sn485 LTC485ffs

The

● denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VCC = 5V ±5%, unless otherwise noted. (Notes 2 and 3)

A

G

A

U

A

R

BSOLUTEXI

TI

S

(Note 1)

Supply Voltage ....................................................... 12V

Control Input Voltages ................... – 0.5V to VCC + 0.5V

Driver Input Voltage ....................... – 0.5V to VCC + 0.5V

Driver Output Voltage ...........................................

±14V

Receiver Input Voltage ..........................................

±14V

Receiver Output Voltages .............. – 0.5V to VCC + 0.5V

Operating Temperature Range

LTC485I ...................................... – 40

°C ≤ TA ≤ 85°C

LTC485C ......................................... 0

°C ≤ TA ≤ 70°C

LTC485M (OBSOLETE) .......... –55

°C ≤ TA ≤ 125°C

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

°C

PACKAGE/ORDER I FOR ATIO

ORDER PART

NUMBER

S8 PART MARKING

LTC485CN8

LTC485CS8

LTC485IN8

LTC485IS8

485

485I

TJMAX = 125°C, θJA = 100°C/ W (N)

TJMAX = 150°C, θJA = 150°C/ W (S)

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VOD1

Differential Driver Output Voltage (Unloaded)

IO = 0

●

5V

VOD2

Differential Driver Output Voltage (with Load)

R = 50

Ω (RS422)

●

2V

R = 27

Ω (RS485), Figure 1

●

1.5

5

V

∆VOD

Change in Magnitude of Driver Differential

R = 27

Ω or R = 50Ω, Figure 1

●

0.2

V

Output Voltage for Complementary States

VOC

Driver Common Mode Output Voltage

R = 27

Ω or R = 50Ω, Figure 1

●

3V

∆⏐VOC⏐

Change in Magnitude of Driver Common-Mode

R = 27

Ω or R = 50Ω, Figure 1

●

0.2

V

Output Voltage for Complementary States

VIH

Input High Voltage

DE, DI, RE

●

2V

VIL

Input Low Voltage

DE, DI, RE

●

0.8

V

IIN1

Input Current

DE, DI, RE

●

±2

µA

IIN2

Input Current (A, B)

DE = 0, VCC = 0V VIN = 12V

●

±1mA

or 5.25V

VIN = – 7V

●

– 0.8

mA

VTH

Differential Input Threshold Voltage

– 7V

≤ VCM ≤ 12V

●

– 0.2

0.2

V

for Receiver

∆VTH

Receiver Input Hysteresis

VCM = 0V

●

70

mV

VOH

Receiver Output High Voltage

IO = – 4mA, VID = 200mV

●

3.5

V

VOL

Receiver Output Low Voltage

IO = 4mA, VID = – 200mV

●

0.4

V

IOZR

Three-State (High Impedance) Output

VCC = Max, 0.4V ≤ VO ≤ 2.4V

●

±1

µA

Current at Receiver

RIN

Receiver Input Resistance

– 7V

≤ VCM ≤ 12V

●

12

k

Ω

ELECTRICAL C

C

HARA TERISTICS

ORDER PART

NUMBER

Consult LTC Marketing for parts specified with wider operating temperature ranges.

LTC485CJ8

LTC485MJ8

J8 PACKAGE

8-LEAD CERAMIC DIP

N8 PACKAGE

8-LEAD PLASTIC DIP

1

2

3

4

8

7

6

5

TOP VIEW

VCC

B

A

GND

S8 PACKAGE

8-LEAD PLASTIC SOIC

R

D

RO

RE

DE

DI

TJMAX = 155°C, θJA = 100°C/ W (J)

OBSOLETE PACKAGE

Consider the N8 Package for Alternate Source

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