Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited,

12Mbps, RS-485/RS-422 Transceivers in µMAX Package

2

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

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.

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

Receiver Input Voltage, Half Duplex (Y, Z) ............-8V to +12.5V

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

Continuous Power Dissipation

10-Pin µMAX (derate 5.6mW/°C above +70°C) ............444mW

Operating Temperature Ranges

MAX148_C_ _ ......................................................0°C to +70°C

MAX148_E_ _....................................................-40°C to +85°C

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

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

R = 50

Ω (RS-422), Figure 5

No load, Figure 5

-7V

DE = GND

DE, DI, RE, H/F

DE, DI, RE, H/F

R = 50

Ω or 27Ω, Figure 5

R = 50

Ω or 27Ω, Figure 5

R = 50

Ω or 27Ω, Figure 5

DE = GND,

DE, DI, RE, H/F

CONDITIONS

mA

35

250

Driver Output Short-Circuit

Current (Note 3)

µA

-10

10

Output Leakage (Y and Z)

(MAX1481/MAX1484 Only)

mA

0.125

Input Current (Y and Z for Half

Duplex, A and B for Full Duplex)

µA

±2

Input Current

2.0

Differential Driver Output

5

V

0.8

Input Low Voltage

V

2.0

Input High Voltage

V

0.2

Change in Magnitude of

Common-Mode Voltage (Note 2)

V

0.2

Change in Magnitude of

Differential Output Voltage

(Note 2)

V

3

Driver Common-Mode Output

Voltage

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

DE = GND

-100

µA

125

Output Leakage (Y and Z)

(MAX1485/MAX1486 Only)

R = 27

Ω (RS-485), Figure 5

V

1.5

5

-0.1

DRIVER