MAX202ECSE+T

Maxim Integrated  |  11

www.maximintegrated.com

MAX202E–MAX213E,
MAX232E/MAX241E

±15kV ESD-Protected, 

5V RS-232 Transceivers 

V+

V-

200

μs/div

3V

0V

10V

5V

0V

-5V

-10V

SHDN

MAX211E

Figure 5.  MAX211E V+ and V- when Exiting Shutdown (0.1µF
capacitors)

X = Don't care.

*

Active = active with reduced performance

SHDN

E

EN

N

OPERATION

STATUS

Tx

Rx

0

0

Normal
Operation

All Active

All Active

0

1

Normal
Operation

All Active

All High-Z

1

X

Shutdown

All High-Z

All High-Z

Table 1a.  MAX205E/MAX206E/MAX211E/
MAX241E Control Pin Configurations

Table 1b.  MAX213E Control Pin
Configurations

for the MAX205E/MAX206E/MAX211E/MAX241E
(SHDN), but is active low for the MAX213E (

SHDN).

The MAX213E’s receiver propagation delay is typically
0.5µs in normal operation. In shutdown mode, propaga-
tion delay increases to 4µs for both rising and falling
transitions. The MAX213E’s receiver inputs have
approximately 0.5V hysteresis, except in shutdown,
when receivers R4 and R5 have no hysteresis.

When entering shutdown with receivers active, R4 and
R5 are not valid until 80µs after 

SHDN is driven low.

When coming out of shutdown, all receiver outputs are
invalid until the charge pumps reach nominal voltage
levels (less than 2ms when using 0.1µF capacitors).

±15kV ESD Protection

As with all Maxim devices, ESD-protection structures
are incorporated on all pins to protect against electro-
static discharges encountered during handling and
assembly. The driver outputs and receiver inputs have
extra protection against static electricity. Maxim’s engi-
neers developed state-of-the-art structures to protect
these pins against ESD of ±15kV without damage. The
ESD structures withstand high ESD in all states:  normal
operation, shutdown, and powered down. After an ESD
event, Maxim’s E versions keep working without latchup,
whereas competing RS-232 products can latch and
must be powered down to remove latchup.

ESD protection can be tested in various ways; the
transmitter 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 set-up, 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 inter-

S

SH

HD

DN

EN

OPERATION

STATUS

Tx 1–4

0

0

Shutdown

All High-Z

0

1

Shutdown

All High-Z

1

0

Normal
Operation

1

1

Normal
Operation

All Active

All Active

Active

1–3

4, 5

High-Z

Active

High-Z

High-Z

High-Z

Active*

High-Z

Rx

MAX202ECSE+T Information:
Part No.
MAX202ECSE+T

RFQ

Description
IC TXRX RS-232 W/CAP 16-SOIC
File Size
399670 bytes
Page Size
612 x 792 pts (letter)
All Pages
25
Manufacturer
Maxim Integrated
Homepage
http://www.maximintegrated.com/en.html
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