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MAX3235EEWP+G36

P1-P3P4-P6P7-P9P10-P12
________________General Description
The MAX3233E/MAX3235E are EIA/TIA-232 and V.28/V.24
communications interfaces with automatic shutdown/
wake-up features, high data-rate capabilities, and
enhanced electrostatic discharge (ESD) protection. All
transmitter outputs and receiver inputs are protected to
±15kV using IEC 1000-4-2 Air-Gap Discharge, to ±8kV
using IEC 1000-4-2 Contact Discharge, and to ±15kV
using the Human Body Model. The MAX3233E operates
from a +3.3V supply; the MAX3235E operates from +5.0V.
All devices achieve a 1µA supply current using Maxim’s
revolutionary AutoShutdown Plus™ feature. These
devices automatically enter a low-power shutdown
mode when the following two conditions occur: either
the RS-232 cable is disconnected or the transmitters of
the connected peripherals are inactive, and the UART
driving the transmitter inputs is inactive for more than
30 seconds. They turn on again when they sense a
valid transition at any transmitter or receiver input.
AutoShutdown Plus saves power without changes to
the existing BIOS or operating system.
The MAX3233E/MAX3235E have internal dual charge
pumps requiring no external capacitors. Both trans-
ceivers have a proprietary low-dropout transmitter out-
put stage that enables true RS-232 performance from a
+3.0V to +3.6V supply for the MAX3233E or a +4.5V to
+5.5V supply for the MAX3235E. These devices are
guaranteed to operate up to 250kbps. Both are avail-
able in space-saving 20-pin wide SO or plastic DIP
packages.
________________________Applications
Subnotebook and Palmtop Computers
Cellular Phones
Battery-Powered Equipment
Handheld Equipment
Peripherals
Embedded Systems
____________________________Features
♦ ESD Protection for RS-232 I/O Pins
±15kV—Human Body Model
±8kV—IEC 1000-4-2, Contact Discharge
±15kV—IEC 1000-4-2, Air-Gap Discharge
♦ Latchup Free
♦ 1µA Supply Current
♦ AutoShutdown Plus—1997 EDN Magazine
Innovation of the Year
♦ Single-Supply Operation
+3.0V to +3.6V (MAX3233E)
+4.5V to +5.5V (MAX3235E)
♦ 250kbps Guaranteed Data Rate
♦ 6V/µs Guaranteed Slew Rate
♦ Meets EIA/TIA-232 Specifications Down to 3.0V
(MAX3233E)
♦ Internal Charge-Pump Capacitors
MAX3233E/MAX3235E
†
±15kV ESD-Protected, 1µA, 250kbps, 3.3V/5V, Dual
RS-232 Transceivers with Internal Capacitors
________________________________________________________________ Maxim Integrated Products 1
19-1473; Rev 2; 8/04
PART
MAX3233ECWP
0°C to +70°C
TEMP RANGE PIN-PACKAGE
20 SO
AutoShutdown Plus is a trademark of Maxim Integrated Products, Inc.
_______________Ordering Information
Ordering Information continued at end of data sheet.
MAX3233E
MAX3235E
12
13
14
15
16
17
18
4
1
R2OUT R2IN
T2OUT
GND
V-
C2-
C2+
C1-
C1+
V+
V+
INVALID
T2IN
T1IN
FORCEON
R1OUT
T1OUT
R1IN
V
CC
FORCEOFF
2
9
10
5
6
7
8
3
19
20
11
CHARGE
PUMP
SO/DIP
Pin Configuration/
Functional Diagram
Typical Operating Circuit appears at end of data sheet.
MAX3233ECPP 0°C to +70°C 20 Plastic DIP
MAX3233EEPP -40°C to +85°C 20 Plastic DIP
MAX3233EEWP -40°C to +85°C 20 SO
†
Co7;
4,7er
pg.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
MAX3233E/MAX3235E
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +3.0V to +3.6V for MAX3233E, V
CC
= +4.5V to +5.5V for MAX3235E; T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical val-
ues are at T
A
= +25°C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress rating s only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
CC
to GND (MAX3233E).........................................-0.3V to +4V
V
CC
to GND (MAX3235E).........................................-0.3V to +6V
V+ to GND (Note 1)..................................................-0.3V to +7V
V- to GND (Note 1)...................................................+0.3V to -7V
V+ +
|V-| (Note 1).................................................................+13V
Input Voltages
T_IN, FORCEON,
FORCEOFF to GND....................-0.3V to +6V
R_IN to GND...................................................................±25V
Output Voltages
T_OUT to GND.............................................................±13.2V
R_OUT, INVALID to GND......................-0.3V to (V
CC
+ 0.3V)
Short-Circuit Duration
T_OUT to GND......................................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
Wide SO (derate 10mW/°C above +70°C)..................800mW
Plastic DIP (derate 11.11mW/°C above +70°C) .........889mW
Operating Temperature Ranges
MAX323_EC_P...................................................0°C to +70°C
MAX323_EE_P................................................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s) (Note 2)...................+300°C
Note 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.
Note 2: Maximum reflow temperature is +220°C.
FORCEON = GND, FORCEOFF = V
CC
,
all R_IN idle, all T_IN idle
T
A
= +25°C
CONDITIONS
kΩ357Input Resistance
V0.5Input Hysteresis
1.8 2.4
V
1.5 2.4
Input Threshold High
0.8 1.3
V
0.6 1.0
Input Threshold Low
V-25 +25Input Voltage Range
V
V
CC
- 0.6 V
CC
- 0.1
Output Voltage High
V0.4Output Voltage Low
µA110Supply Current, Shutdown
µA110
Supply Current,
AutoShutdown Plus
µA±0.01 ±1
Transmitter Input Hysteresis V0.5
V
2.4
Input Logic Threshold High
mA0.3 1
Supply Current,
AutoShutdown Plus Disabled
V0.8Input Logic Threshold Low
2
UNITSMIN TYP MAXSYMBOLPARAMETER
FORCEOFF = GND
T
A
= +25°C
T_IN, FORCEON, FORCEOFF
FORCEON = FORCEOFF = V
CC
, no load
T_IN, FORCEON, FORCEOFF
I
OUT
= -1.0mA
I
OUT
= 1.6mA
Input Leakage Current
DC CHARACTERISTICS (V
CC
= 3.3V for MAX3233E, V
CC
= 5.0V for MAX3235E, T
A
= +25°C
.
)
LOGIC INPUTS AND RECEIVER OUTPUTS
RECEIVER INPUTS
T
A
= +25°C
V
CC
= 5.0V, MAX3235E
V
CC
= 3.3V, MAX3233E
V
CC
= 5.0V, MAX3235E
V
CC
= 3.3V, MAX3233E
±15kV ESD-Protected, 1µA, 250kbps, 3.3V/5V, Dual
RS-232 Transceivers with Internal Capacitors
T_IN, FORCEON,
FORCEOFF
V
CC
= 5.0V, MAX3235E
V
CC
= 3.3V, MAX3233E
MAX3233E/MAX3235E
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +3.6V for MAX3233E, V
CC
= +4.5V to +5.5V for MAX3235E; T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical val-
ues are at T
A
= +25°C.)
CONDITIONS
Ω300 10MOutput Resistance
V±5 ±5.4Output Voltage Swing
UNITSMIN TYP MAXSYMBOLPARAMETER
Figure 3a
s15 30 60t
AUTOSHDN
Receiver or Transmitter Edge to
Transmitters Shut Down
µs100t
WU
Receiver or Transmitter Edge to
Transmitters Enabled
µs1t
INVH
Receiver Positive or Negative
Threshold to INVALID High
V
V
CC
- 0.6
INVALID, Output Voltage High
V0.4
INVALID Output Voltage Low
V-0.3 0.3
Receiver Input Threshold to
INVALID Output Low
-2.7
V
2.7
Receiver Input Threshold to
INVALID Output High
±15
±8R_IN, T_OUT kV
±15
µA
±25
Output Leakage Current
±60 mAOutput Short-Circuit Current
V
CC
= V+ = V- = 0, transmitter outputs = ±2V
All transmitter outputs loaded with 3kΩ to
ground
Figure 3b (Note 3)
Figure 3b (Note 3)
Figure 3b
I
OUT
= -1.0mA
I
OUT
= -1.6mA
Figure 3a
Human Body Model
V
OUT
= ± 12V
transmitters
disabled
IEC1000-4-2 Contact Discharge
IEC1000-4-2 Air Discharge
V
CC
= 0 or +4.5V to
5.5V (MAX3235E)
V
CC
= 0 or +3.0V to
3.6V (MAX3233E)
±15kV ESD-Protected, 1µA, 250kbps, 3.3V/5V, Dual
RS-232 Transceivers with Internal Capacitors
±25
MAX3233E
MAX3235E 50
µs
70
t
INVL
Receiver Positive or Negative
Threshold to INVALID Low
Figure 3b
TRANSMITTER OUTPUTS
ESD PROTECTION
AutoShutdown PLUS (FORCEON = GND, FORCEOFF = V
CC
)
Positive threshold
Negative threshold
Note 3: A transmitter/receiver edge is defined as a transition through the transmitter/receiver input logic thresholds.
P1-P3P4-P6P7-P9P10-P12

MAX3235EEWP+G36

Mfr. #:
Buy MAX3235EEWP+G36
Manufacturer:
Maxim Integrated
Description:
RS-232 Interface IC 3.3V/5V Dual Transceiver
Lifecycle:
New from this manufacturer.
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