MAX3237EAI 반도체 회로 부품 판매점
3.0V to 5.5V / Low-Power / up to 1Mbps / True RS-232 Transceivers Using Four 0.1F External Capacitors
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 Maxim Integrated |
19-0273; Rev 5; 3/99
3.0V to 5.5V, Low-Power, up to 1Mbps, True RS-232
Transceivers Using Four 0.1µF External Capacitors
_______________General Description
The MAX3222/MAX3232/MAX3237/MAX3241 trans-
ceivers have a proprietary low-dropout transmitter out-
put stage enabling true RS-232 performance from a
3.0V to 5.5V supply with a dual charge pump. The
devices require only four small 0.1µF external charge-
pump capacitors. The MAX3222, MAX3232, and
MAX3241 are guaranteed to run at data rates of
120kbps while maintaining RS-232 output levels. The
MAX3237 is guaranteed to run at data rates of 250kbps
in the normal operating mode and 1Mbps in the
MegaBaud™ operating mode, while maintaining RS-232
output levels.
The MAX3222/MAX3232 have 2 receivers and 2
drivers. The MAX3222 features a 1µA shutdown mode
that reduces power consumption and extends battery
life in portable systems. Its receivers remain active in
shutdown mode, allowing external devices such as
modems to be monitored using only 1µA supply cur-
rent. The MAX3222 and MAX3232 are pin, package,
and functionally compatible with the industry-standard
MAX242 and MAX232, respectively.
The MAX3241 is a complete serial port (3 drivers/
5 receivers) designed for notebook and subnotebook
computers. The MAX3237 (5 drivers/3 receivers) is ideal
for fast modem applications. Both these devices feature
a shutdown mode in which all receivers can remain
active while using only 1µA supply current. Receivers R1
(MAX3237/MAX3241) and R2 (MAX3241) have extra out-
puts in addition to their standard outputs. These extra
outputs are always active, allowing external devices
such as a modem to be monitored without forward bias-
ing the protection diodes in circuitry that may have VCC
completely removed.
The MAX3222, MAX3237, and MAX3241 are available
in space-saving TSSOP and SSOP packages.
________________________Applications
Notebook, Subnotebook, and Palmtop Computers
High-Speed Modems
Battery-Powered Equipment
Hand-Held Equipment
Peripherals
Printers
____________________________Features
o Low Supply Current:
300µA (MAX3222/MAX3232/MAX3241)
500µA (MAX3237)
o Guaranteed Data Rate:
120kbps (MAX3222/MAX3232/MAX3241)
250kbps (MAX3237—Normal Operation)
1Mbps (MAX3237—MegaBaud Operation)
o 1µA Low-Power Shutdown with Receivers Active
(MAX3222/MAX3237/MAX3241)
o Flow-Through Pinout (MAX3237)
o Meets EIA/TIA-232 Specifications Down to 3.0V
o Guaranteed Mouse Driveability (MAX3241)
o Pin Compatible with Industry-Standard MAX232
(MAX3232)
Pin Compatible with Industry-Standard MAX242
(MAX3222)
o Guaranteed Slew Rate:
6V/µs (MAX3222/MAX3232/MAX3237/MAX3241)
24V/µs (MAX3237—MegaBaud Operation)
______________Ordering Information
PART
MAX3222CUP
MAX3222CAP
MAX3222CWN
MAX3222CPN
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
20 TSSOP
20 SSOP
18 SO
18 Plastic DIP
Ordering Information continued at end of data sheet.
_________________Pin Configurations
TOP VIEW
EN 1
C1+ 2
V+ 3
C1- 4
C2+ 5
C2- 6
V- 7
T2OUT 8
R2IN 9
MAX3222
18 SHDN
17 VCC
16 GND
15 T1OUT
14 R1IN
13 R1OUT
12 T1IN
11 T2IN
10 R2OUT
Typical Operating Circuits appear at end of data sheet.
DIP/SO
Pin Configurations continued at end of data sheet.
MegaBaud is a trademark of Maxim Integrated Products.
*Covered by U.S. Patent numbers 4,636,930; 4,679,134; 4,777,577; 4,797,899; 4,809,152; 4,897,774; 4,999,761; and other patents pending.
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
3.0V to 5.5V, Low-Power, up to 1Mbps, True RS-232
Transceivers Using Four 0.1µF External Capacitors
ABSOLUTE MAXIMUM RATINGS
VCC ...........................................................................-0.3V to +6V
V+ (Note 1) ...............................................................-0.3V to +7V
V- (Note 1) ................................................................+0.3V to -7V
V+ + V- (Note 1)...................................................................+13V
Input Voltages
T_IN, SHDN, EN ...................................................-0.3V to +6V
MBAUD...................................................-0.3V to (VCC + 0.3V)
R_IN .................................................................................±25V
Output Voltages
T_OUT ...........................................................................±13.2V
R_OUT ....................................................-0.3V to (VCC + 0.3V)
Short-Circuit Duration
T_OUT ....................................................................Continuous
Continuous Power Dissipation (TA = +70°C)
16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)...842mW
16-Pin Narrow SO (derate 8.70mW/°C above +70°C) ....696mW
16-Pin Wide SO (derate 9.52mW/°C above +70°C)........762mW
16-Pin TSSOP (derate 6.7mW/°C above +70°C).............533mW
18-Pin Plastic DIP (derate 11.11mW/°C above +70°C) ..889mW
18-Pin SO (derate 9.52mW/°C above +70°C)..............762mW
20-Pin SSOP (derate 8.00mW/°C above +70°C) .........640mW
20-Pin TSSOP (derate 7.0mW/°C above +70°C).............559mW
28-Pin SO (derate 12.50mW/°C above +70°C) .....................1W
28-Pin SSOP (derate 9.52mW/°C above +70°C) .........762mW
28-Pin TSSOP (derate 8.7mW/°C above +70°C).............696mW
Operating Temperature Ranges
MAX32_ _C_ _.....................................................0°C to +70°C
MAX32_ _E_ _ .................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
Note 1: V+ and V- can have a maximum magnitude of 7V, but their absolute difference cannot exceed 13V.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VCC = +3.0V to +5.5V, C1–C4 = 0.1µF (Note 2), TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
DC CHARACTERISTICS
CONDITIONS
MIN TYP MAX
UNITS
VCC Power-Supply Current
No load, VCC = 3.3V or 5.0V,
TA = +25°C
MAX3222/MAX3232/
MAX3241
MAX3237
0.3 1.0
0.5 2.0
mA
Shutdown Supply Current
SHDN = GND, TA = +25°C
LOGIC INPUTS AND RECEIVER OUTPUTS
1.0 10
µA
Input Logic Threshold Low
(Note 3)
T_IN, EN, SHDN, MBAUD
0.8 V
Input Logic Threshold High
(Note 3)
Input Leakage Current
VCC = 3.3V
VCC = 5.0V
T_IN, EN, SHDN, MBAUD
2.0
2.4
±0.01 ±1.0
V
µA
Output Leakage Current
Receivers disabled
±0.05 ±10
µA
Output Voltage Low
Output Voltage High
RECEIVER INPUTS
Input Voltage Range
Input Threshold Low
Input Threshold High
IOUT = 1.6mA
IOUT = -1.0mA
TA = +25°C
VTACC==+255.0°VC
VCC = 3.3V
VCC = 5.0V
VCC = 3.3V
VCC = 5.0V
0.4
VCC - 0.6 VCC - 0.1
-25 25
0.6 1.2
0.8 1.5
1.5 2.4
1.8 2.4
V
V
V
V
V
2 _______________________________________________________________________________________
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MAX3237EAI transceiver
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MAX3237EAI
3.0V to 5.5V / Low-Power / up to 1Mbps / True RS-232 Transceivers Using Four 0.1F External Capacitors - Maxim Integrated
