MAX3243EETJ データシートの表示（PDF） - Maxim Integrated

部品番号

コンポーネント説明

メーカー

MAX3243EETJ

±15kV ESD-Protected, 1µA, 3.0V to 5.5V, 250kbps, RS-232 Transceivers with AutoShutdown

Maxim Integrated 

MAX3221E/MAX3223E/MAX3243E

±15kV ESD-Protected, 1µA, 3.0V to 5.5V, 250kbps,

RS-232 Transceivers with AutoShutdown

FORCEOFF

FORCEON

INVALID

POWER DOWN

INVALID IS AN INTERNALLY GENERATED SIGNAL

THAT IS USED BY THE AUTOSHUTDOWN LOGIC

AND APPEARS AS AN OUTPUT OF THE DEVICE.

POWER DOWN IS ONLY AN INTERNAL SIGNAL.

IT CONTROLS THE OPERATIONAL STATUS OF

THE TRANSMITTERS AND THE POWER SUPPLIES.

Figure 3c. MAX32_ _E AutoShutdown Logic

POWER-

MANAGEMENT

UNIT

MASTER SHDN LINE

0.1µF 1MΩ

FORCEOFF FORCEON

MAX3221E

MAX3223E

MAX3243E

Figure 4. AutoShutdown with Initial Turn-On to Wake Up a

Mouse or Another System

ESD protection can be tested in various ways; the trans-

mitter outputs and receiver inputs of this product family

are characterized for protection to the following limits:

1) ±15kV using the Human Body Model

2) ±8kV using the Contact Discharge Method specified

in IEC1000-4-2

3) ±15kV using IEC1000-4-2’s Air-Gap Method

ESD Test Conditions

ESD performance depends on a variety of conditions.

Contact Maxim for a reliability report that documents

test setup, test methodology, and test results.

Human Body Model

Figure 6a shows the Human Body Model, and Figure

6b shows the current waveform it generates when dis-

charged into a low impedance. This model consists of a

100pF capacitor charged to the ESD voltage of interest,

which is then discharged into the test device through a

1.5kΩ resistor.

IEC1000-4-2

The IEC1000-4-2 standard covers ESD testing and per-

formance of finished equipment; it does not specifically

refer to integrated circuits. The MAX3221E/ MAX3223E/

MAX3243E help you design equipment that meets

Table 2. INVALID Truth Table

RS-232 SIGNAL PRESENT

AT ANY RECEIVER INPUT

Yes

No

INVALID OUTPUT

High

Low

+2.7V

+0.3V

0

-0.3V

-2.7V

TRANSMITTERS ENABLED, INVALID HIGH

INDETERMINATE

AUTOSHUTDOWN, TRANSMITTERS DISABLED,

1µA SUPPLY CURRENT, INVALID LOW

INDETERMINATE

TRANSMITTERS ENABLED, INVALID HIGH

a)

RECEIVER

INPUT

VOLTAGE

(V)

VCC

INVALID

OUTPUT

(V)

0

tINVL

V+

VCC

0

V-

b)

Figure 5. AutoShutdown Trip Levels

INVALID

REGION

tINVH

tWU

10

Maxim Integrated

Share Link: