MAX3480ACPI datasheet(2/16 Pages) MAXIM

2 / 16 page

Complete, Isolated, 3.3V

RS-485/RS-422 Data Interface

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC = VCC1 = VCC2 = VCC4 = VCC5 = 3.0V to 3.6V, FS = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at

VCC = VCC1 = VCC2 = VCC4 = VCC5 = 3.3V and TA = +25°C.) (Notes 1, 2, 3)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

With Respect to GND:

Supply Voltage (VCC1, VCC2, VCC4, VCC5) .........-0.3V to +3.8V

Supply Voltage (VCC3) ..........................................-0.3V to +7V

Control Input Voltage (SD, FS) ................-0.3V to (VCC + 0.3V)

Receiver Output Voltage (RO).................-0.3V to (VCC + 0.3V)

With Respect to ISO COM:

Control Input Voltage (ISO DE _) .........-0.3V to (ISO VCC + 0.3V)

Driver Input Voltage (ISO DI _).........-0.3V to (ISO VCC + 0.3V)

Receiver Output Voltage (ISO RO _) ......-0.3V to (ISO VCC + 0.3V)

Driver Output Voltage (A, B)................................-8V to +12.5V

Receiver Input Voltage (A, B)..............................-8V to +12.5V

LED Forward Current (DI, DE, ISO RO LED) ......................50mA

Continuous Power Dissipation (TA = +70°C)

Plastic DIP (derate 9.09mW/°C above +70°C) ...............727mW

Operating Temperature Ranges

MAX3480_CPI ......................................................0°C to +70°C

MAX3480_EPI ...................................................-40°C to +85°C

Storage Temperature Range .............................-65°C to +160°C

Lead Temperature (soldering, 10sec) .............................+300°C

R = 50

Ω (RS-422)

TA = +25°C, VISO = 50VDC

FS = 0V

´, DI´ (Figure 1)

FS high

FS low

SD = VCC3

Low

High

RL = 54Ω

MAX3480A,

´ = VCC or open

RL = ∞

CONDITIONS

0.3

VOD2

Differential Driver Output (no load)

VOD1

CISO

Isolation Capacitance

Ω

100

10,000

RISO

Isolation Resistance

0.4

VIL

Input Low Voltage

VCC - 0.4

VIH

Input High Voltage

IFSM

FS Input Leakage Current

µA

IFSL

FS Input Pull-Up Current

0.8

VFSL

FS Input Threshold

2.4

VFSH

180

260

600

3.0

3.3

3.6

Supply Voltage

µA

Shutdown Supply Current (Note 3)

0.2

240

ICC

Operating Supply Current

280

120

200

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

ISHDN

R = 27

Ω (RS-485), Figure 3

1.5

Switch Frequency

fSWL

kHz

RL = 54Ω

R = 27

Ω or 50Ω,

Figure 3

R = 27

Ω or 50Ω, Figure 4

∆VOD

Change in Magnitude of Driver

Output Voltage for Complementary

Output States

fSWH

900

RL = ∞

FS = VCC or open

MAX3480B,

´ = VCC or open

Differential Driver Output (with load)

Driver Common-Mode Output

VOC

Differential

0.3

Common Mode

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