IC TXRX RS232 250KBPS LP 16-SSOP

MAX3232CAE+

Manufacturer Part NumberMAX3232CAE+
DescriptionIC TXRX RS232 250KBPS LP 16-SSOP
ManufacturerMaxim Integrated Products
TypeTransceiver
MAX3232CAE+ datasheet
 


Specifications of MAX3232CAE+

Number Of Drivers/receivers2/2ProtocolRS232
Voltage - Supply3 V ~ 5.5 VMounting TypeSurface Mount
Package / Case16-SSOPPropagation Delay Time Ns0.3 us
Operating Supply Voltage3 V to 5 VSupply Current0.3 mA
Operating Temperature Range0 C to + 70 CData Rate120 Kbps
Mounting StyleSMD/SMTNumber Of I/os2 / 2
Lead Free Status / RoHS StatusLead free / RoHS Compliant  
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19-0273; Rev 7; 1/07
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 V
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
Typical Operating Circuits appear at end of data sheet.
MegaBaud and UCSP are trademarks of Maxim Integrated Products, Inc.
*
________________________________________________________________ Maxim Integrated Products
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.
__Next Generation Device Features
♦ For Smaller Packaging:
MAX3228E/MAX3229E: +2.5V to +5.5V RS-232
Transceivers in UCSP™
♦ For Integrated ESD Protection:
MAX3222E/MAX3232E/MAX3237E/MAX3241E/
MAX3246E: ±15kV ESD-Protected, Down to 10nA,
3.0V to 5.5V, Up to 1Mbps, True RS-232
Transceivers
♦ For Low-Voltage or Data Cable Applications:
MAX3380E/MAX3381E: +2.35V to +5.5V, 1µA,
2 Tx/2 Rx RS-232 Transceivers with ±15kV
ESD-Protected I/O and Logic Pins
_______________Ordering Information
PART
TEMP RANGE
MAX3222CUP+
0°C to +70°C
MAX3222CAP+
0°C to +70°C
MAX3222CWN+
0°C to +70°C
MAX3222CPN+
0°C to +70°C
+
Denotes lead-free package.
Ordering Information continued at end of data sheet.
CC
_________________Pin Configurations
TOP VIEW
+
EN
1
C1+
2
V+
3
C1-
4
C2+
5
C2-
6
V-
7
T2OUT
8
R2IN
9
Pin Configurations continued at end of data sheet.
PKG
PIN-PACKAGE
CODE
20 TSSOP
U20+2
20 SSOP
A20+1
18 SO
W18+1
18 Plastic Dip
P18+5
SHDN
18
V
17
CC
16
GND
MAX3222
T1OUT
15
MAX3222
R1IN
14
R1OUT
13
T1IN
12
11
T2IN
10
R2OUT
DIP/SO
1

MAX3232CAE+ Summary of contents

  • Page 1

    ... Battery-Powered Equipment Hand-Held Equipment Peripherals Printers Typical Operating Circuits appear at end of data sheet. MegaBaud and UCSP are trademarks of Maxim Integrated Products, Inc. * ________________________________________________________________ Maxim Integrated Products 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. ...

  • Page 2

    Low-Power 1Mbps, True RS-232 Transceivers Using Four 0.1µF External Capacitors ABSOLUTE MAXIMUM RATINGS V ...........................................................................-0. (Note 1) ...............................................................-0.3V to +7V V- (Note 1) ................................................................+0. (Note 1)...................................................................+13V ...

  • Page 3

    Low-Power 1Mbps, True RS-232 Transceivers Using Four 0.1µF External Capacitors ELECTRICAL CHARACTERISTICS (continued +3.0V to +5.5V, C1–C4 = 0.1µF (Note 2 PARAMETER Input Hysteresis Input Resistance T = +25°C A TRANSMITTER ...

  • Page 4

    Low-Power 1Mbps, True RS-232 Transceivers Using Four 0.1µF External Capacitors TIMING CHARACTERISTICS—MAX3237 (V = +3.0V to +5.5V, C1–C4 = 0.1µF (Note 2 PARAMETER R = 3kΩ MBAUD = GND V = ...

  • Page 5

    Low-Power 1Mbps, True RS-232 Transceivers Using Four 0.1µF External Capacitors _____________________________Typical Operating Characteristics (continued +3.3V, 235kbps data rate, 0.1µF capacitors, all transmitters loaded with 3kΩ MAX3241 TRANSMITTER OUTPUT VOLTAGE vs. LOAD ...

  • Page 6

    Low-Power 1Mbps, True RS-232 Transceivers Using Four 0.1µF External Capacitors ______________________________________________________________Pin Description PIN MAX3222 MAX3232 MAX3237 DIP/SO SSOP 1 1 — ...

  • Page 7

    Low-Power 1Mbps, True RS-232 Transceivers Using Four 0.1µF External Capacitors _______________Detailed Description Dual Charge-Pump Voltage Converter The MAX3222/MAX3232/MAX3237/MAX3241’s internal power supply consists of a regulated dual charge pump that provides output voltages of +5.5V (doubling ...

  • Page 8

    Low-Power 1Mbps, True RS-232 Transceivers Using Four 0.1µF External Capacitors PROTECTION DIODE UART Tx GND SHDN = GND a) OLDER RS-232: POWERED-DOWN UART DRAWS CURRENT FROM ACTIVE RECEIVER OUTPUT IN ...

  • Page 9

    Low-Power 1Mbps, True RS-232 Transceivers Using Four 0.1µF External Capacitors Table 1. MAX3222/MAX3237/MAX3241 Shutdown and Enable Control Truth Table T_OUT R_OUT 0 0 ...

  • Page 10

    Low-Power 1Mbps, True RS-232 Transceivers Using Four 0.1µF External Capacitors Figure 4a. MAX3241 Transmitter Output Voltage vs. Load Current per Transmitter Figure 4b. Mouse Driver Test Circuit 10 ______________________________________________________________________________________ 6 5 ...

  • Page 11

    Low-Power 1Mbps, True RS-232 Transceivers Using Four 0.1µF External Capacitors V CC 0.1µ C1+ C1 C1- C2+ MAX3222 MAX3232 C2 C2- MAX3237 MAX3241 OUT R_ OUT * EN 5kΩ 0V ...

  • Page 12

    Low-Power 1Mbps, True RS-232 Transceivers Using Four 0.1µF External Capacitors Interconnection with 3V and 5V Logic The MAX3222/MAX3232/MAX3237/MAX3241 can directly interface with various 5V logic families, includ- ing ACT and HCT CMOS. See Table 3 ...

  • Page 13

    Low-Power 1Mbps, True RS-232 Transceivers Using Four 0.1µF External Capacitors _____________________________________Typical Operating Circuits (continued) 0.1µ C1+ 0.1µF 25 C1- 1 MAX3237 C2+ 0.1µF 3 C2- T1IN 24 T1 T2IN 23 T2 ...

  • Page 14

    Low-Power 1Mbps, True RS-232 Transceivers Using Four 0.1µF External Capacitors _____________________________________________Pin Configurations (continued C1 C1- 4 MAX3222 C2 T2OUT 8 R2IN 9 R2OUT 10 ...

  • Page 15

    Low-Power 1Mbps, True RS-232 Transceivers Using Four 0.1µF External Capacitors PART TEMP RANGE PIN-PACKAGE MAX3222EUP+ -40°C to +85°C 20 TSSOP MAX3222EAP+ -40°C to +85°C 20 SSOP MAX3222EWN+ -40°C to +85° MAX3222EPN+ -40°C to ...

  • Page 16

    Low-Power 1Mbps, True RS-232 Transceivers Using Four 0.1µF External Capacitors ___________________Chip Topography MAX3222 SHDN V+ C1 C1- C2+ 0.127" (3.225mm) C2- V- T2IN T2OUT R2IN R2OUT 0.087" (2.209mm) TRANSISTOR COUNT: 339 SUBSTRATE CONNECTED ...

  • Page 17

    ... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 17 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 © 2007 Maxim Integrated Products Package Information PACKAGE OUTLINE, TSSOP 4 ...