MAX3232ECAE datasheet(11/22 Pages) AD

11 / 22 page

±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V,

Up to 1Mbps, True RS-232 Transceivers

ESD protection can be tested in various ways; the

transmitter outputs and receiver inputs for the

MAX3222E/MAX3232E/MAX3241E/MAX3246E are

characterized for protection to the following limits:

• ±15kV using the Human Body Model

• ±8kV using the Contact Discharge method specified

in IEC 1000-4-2

• ±9kV (MAX3246E only) using the Contact Discharge

method specified in IEC 1000-4-2

• ±15kV using the Air-Gap Discharge method speci-

fied in IEC 1000-4-2

CHARGE-CURRENT-

LIMIT RESISTOR

DISCHARGE

RESISTANCE

STORAGE

CAPACITOR

100pF

Ω

1500

Ω

HIGH-

VOLTAGE

SOURCE

DEVICE-

UNDER-

TEST

Figure 4a. Human Body ESD Test Model

IP 100%

90%

36.8%

tRL

TIME

tDL

CURRENT WAVEFORM

PEAK-TO-PEAK RINGING

(NOT DRAWN TO SCALE)

10%

AMPERES

Figure 4b. Human Body Model Current Waveform

CHARGE-CURRENT-

LIMIT RESISTOR

DISCHARGE

RESISTANCE

STORAGE

CAPACITOR

150pF

50M

Ω to 100MΩ

330

Ω

HIGH-

VOLTAGE

SOURCE

DEVICE-

UNDER-

TEST

Figure 5a. IEC 1000-4-2 ESD Test Model

tr = 0.7ns to 1ns

30ns

60ns

100%

90%

10%

Figure 5b. IEC 1000-4-2 ESD Generator Current Waveform

Table 1. MAX3222E/MAX3237E/MAX3241E/

MAX3246E Shutdown and Enable Control

Truth Table

SHDN

T_OUT

R_OUT

R_OUTB

(MAX3237E/

MAX3241E)

High

impedance

Active

High

impedance

High

impedance

Active

High

impedance

Active

Maxim Integrated

MAX3222E/MAX3232E/MAX3237E/

MAX3241E/MAX3246E

MAX3232ECAE Datasheet(PDF) 11 Page - Analog Devices

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