VDDA to GNDA ......................................................-0.3V to +6V

VDDB to GNDB.......................................................-0.3V to +6V

VLDO to GNDB .....................................................-0.3V to +16V

TXD, DE, RE, PV to GNDA ....................................-0.3V to +6V

SBA, RXD to GNDA ............................. -0.3V to (VDDA + 0.3V)

DEM to GNDB ...................................... -0.3V to (VDDB + 0.3V)

A, B to GNDB ...........................................................-8V to +13V

Short Circuit Duration (RXD, SBA to GNDA,

A, B, DEM ,VDDB to GNDB)..................................Continuous

16-pin W SOIC (derate 14.1mW/°C

above +70°C) .........................................................1126.8mW

Operating Temperature Range......................... -40°C to +105°C

Junction Temperature......................................................+150°C

Storage Temperature Range............................ -65°C to +150°C

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

Soldering Temperature (reflow).......................................+260°C

(Note 1)

DC Electrical Characteristics

(VDDA – VGNDA = 1.71V to 5.5V, VDDB – VGNDB = 4.5V to 5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are

at VDDA – VGNDA = 3.3V, VDDB – VGNDB = 5V, VGNDA = VGNDB, and TA = +25°C.) (Notes 2, 3)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

POWER

Supply Voltage

1.71

5.5

V

4.5

5.5

Supply Current

VDDA = 5V, DE = high, RE = TXD = low,

RXD unconnected, no load

4

6.6

mA

DE = high, RE = TXD = low, RXD

unconnected, no bus load, VDDB = 5V

7.6

12.5

Undervoltage-Lockout

Threshold

VDDA rising

1.50

1.58

1.65

V

VDDB rising

2.55

2.7

2.85

Undervoltage-Lockout

Threshold Hysteresis

50

mV

200

LDO

LDO Supply Voltage

VLDO

Relative to GNDB, LDO is on (Note 4)

4.68

14

V

LDO Supply Current

ILDO

DE = high, TXD = low, no bus load,

VLDO = 5V

7.7

12.9

mA

LDO Output Voltage

VDDB

4.5

5

5.5

V

LDO Current Limit

300

mA

Load Regulation

VLDO = 5.68V, ILOAD = 20mA to

40mA

0.19

1.7

mV/mA

Line Regulation

VLDO = 5.68V to 14V, ILOAD = 20mA

0.12

4.5

mV/V

MAX14938/MAX14939

RS-485 Transceivers with ±35kV ESD Protection

www.maximintegrated.com

Maxim Integrated │ 2

Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer

board. For detailed information on package thermal considerations, refer to

Absolute Maximum Ratings

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.

Package Thermal Characteristics