RS-485/RS-422 Transceivers with Preemphasis

for High-Speed, Long-Distance Communication

2

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC 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 (Y, Z) ................................-7.5V to +12.5V

Receiver Input Voltage (A, B)..............................-7.5V to +12.5V

14-Pin SO (derate 8.7mW/°C above +70°C).................695mW

14-Pin Plastic DIP (derate 10.0mW/°C above +70°C) ..800mW

Operating Temperature Ranges

MAX329_C_ D......................................................0°C to +70°C

MAX329_E_ D ...................................................-40°C to +85°C

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

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

R = 27

Ω

DE = GND,

DE, DI, RE

DE, DI, RE, PEE

DE, DI, RE

CONDITIONS

V

2.4

Differential Driver Output with

Preemphasis

µA

-25

Output Leakage (Y and Z)

25

µA

70

110

PSET Input Current (MAX3292)

V

2.4

Input High Voltage

V

0.8

Input Low Voltage

µA

±2

Input Current

µA

-15

-30

-45

PEE Input Current (MAX3291)

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

Figure 1, R = 27

Ω (Note 3)

V

1.65

2.0

2.35

DPER

Differential Driver

Preemphasis Ratio

Figure 1, R = 27

Ω (Note 4)

V

0.2

Change in Magnitude of

Differential Output Voltage

(Normal and Preemphasis)

Figure 1, R = 27

Ω

V

3

Driver Common-Mode Output

Voltage (Normal and

Preemphasis)

Figure 1, R = 27

Ω (Note 5)

V

0.3

Change in Magnitude of

Common-Mode Voltage

(Normal and Preemphasis)

Figure 1, R = 27

Ω

mV

50

Change in Magnitude of

Common-Mode Output

Voltage (Normal to

Preemphasis)

-7V

mA

±30

±250

Driver Short-Circuit Output

Current

R = 27

Ω

Figure 1

No load (Note 2)

V

5.25

1.5

5.0

Differential Driver Output

PEE

3.75

DRIVER