DC Electrical Characteristics (continued)

(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

Dropout Voltage

VLDO = 4.68V, IDDB = 120mA

100

180

mV

Load Capacitance

Nominal value (Note 8)

1

10

µF

LOGIC INTERFACE (TXD, RXD, DE, RE, SBA, PV, DEM)

Input High Voltage

VIH

RE, TXD, DE, PV

to GNDA

2.25V < VDDA <

5.5V

0.7 x

VDDA

V

1.71V < VDDA <

1.89V

0.78 x

VDDA

Input Low Voltage

VIL

RE, TXD, DE, PV

to GNDA

2.25V < VDDA <

5.5V

0.8

V

1.71V < VDDA <

1.89V

0.6

Input Hysteresis

VHYS

RE, TXD, DE, PV to GNDA

220

mV

Input Capacitance

CIN

RE, TXD, DE, PV, f = 1MHz

2

pF

Input Pull-Up Current

IPU

TXD, PV

-10

-4.5

-1.5

µA

Input Pull-Down Current

IPD

DE, RE

1.5

4.5

10

µA

SBA Pull-Up Resistance

RSBA

MAX14942 only

3

5

8

kΩ

Output Voltage High

VOH

RXD to GNDA, IOUT = -4mA

VDDA -

0.4

V

MAX14941 only, DEM to GNDB,

IOUT = -4mA

VDDB -

0.4

Output Voltage Low

VOL

RXD to GNDA, IOUT = 4mA

0.40

V

MAX14941 only, DEM to GNDB,

IOUT = 4mA

0.40

MAX14942 only, SBA to GNDA,

IOUT = 4mA

0.45

Short Circuit Output Pull-Up

Current

ISH_PU

0V ≤ VRXD ≤ VDDA, RE = low

-42

mA

MAX14941 only, 0V ≤ VDEM ≤ VDDB,

DE = high, PV = high

-42

Short Circuit Output Pull-Down

Current

ISH_PD

0V ≤ VRXD ≤ VDDA, RE = low

+40

mA

MAX14941 only, 0V ≤ VDEM ≤ VDDB,

DE = low, PV = high

+40

MAX14942 only, 0V ≤ VSBA ≤ VDDA,

side B is powered and working

+60

Tri-State Output Current

IOZ

0V ≤ VRXD ≤ VDDA, RE = high

-1

+1

µA

DRIVER

Differential Driver Output

|VOD|

RL = 54Ω, TXD = high or low,

Figure 1a

2.1

V

RL = 100Ω, TXD = high or low,

Figure 1a

2.9

-7V ≤ VCM ≤ +12V, Figure 1b

1.5

5

MAX14941/MAX14942

5kV Isolated 20Mbps Half-Duplex PROFIBUS/

RS-485 Transceivers with ±35kV ESD Protection

www.maximintegrated.com

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