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)

Switching 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.) (Note 8)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

PROTECTION

Thermal-Shutdown Threshold

Temperature Rising

+160

°C

Thermal-Shutdown Hysteresis

15

°C

ESD Protection

(A and B Pins to GNDB)

Human Body Model

±35

kV

IEC 61000-4-2 Air Gap Discharge

±12

IEC 61000-4-2 Contact Discharge

±10

ESD Protection (All Other Pins)

Human Body Model

±4

kV

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

DYNAMIC

Common Mode Transient

Immunity

CMTI

(Note 9)

35

kV/μs

Glitch Rejection

TXD, DE, RXD

10

17

29

ns

DRIVER

Driver Propagation Delay

tDPLH, tDPHL

RL = 54Ω, CL = 50pF, Figure 3 and

Figure 4

68

ns

Differential Driver Output Skew

|tDPLH – tDPHL|

tDSKEW

RL = 54Ω, CL = 50pF, Figure 3 and

Figure 4

6

ns

Driver Differential Output Rise

or Fall Time

tLH, tHL

Figure 4

15

ns

Maximum Data Rate

DRMAX

20

Mbps

Driver Enable to Output High

tDZH

RL = 500Ω, CL = 50pF, Figure 5

88

ns

MAX14938/MAX14939

RS-485 Transceivers with ±35kV ESD Protection

www.maximintegrated.com

Maxim Integrated │ 5