MAX3230E_08 Datasheet, PDF (1/16 Pages) Maxim Integrated Products – ±15kV ESD-Protected +2.5V to +5.5V RS-232 Transceivers in UCSP and WLP

19-3250; Rev 1; 10/08
±15kV ESD-Protected +2.5V to +5.5V
RS-232 Transceivers in UCSP and WLP
General Description
The MAX3230E/AE and MAX3231E/AE are +2.5V to
+5.5V powered EIA/TIA-232 and V.28/V.24 communica-
tions interfaces with low power requirements, high data-
rate capabilities, and enhanced electrostatic discharge
(ESD) protection, in a chip-scale package (UCSP™)
and WLP package. All transmitter outputs and receiver
inputs are protected to ±15kV using IEC 1000-4-2 Air-
Gap Discharge, ±8kV using IEC 1000-4-2 Contact
Discharge, and ±15kV using the Human Body Model.
The MAX3230E/AE and MAX3231E/AE achieve a 1µA
supply current with Maxim’s AutoShutdown™ feature.
They save power without changing the existing BIOS or
operating systems by entering low-power shutdown
mode when the RS-232 cable is disconnected, or when
the transmitters of the connected peripherals are off.
The transceivers have a proprietary low-dropout trans-
mitter output stage, delivering RS-232-compliant perfor-
mance from a +3.1V to +5.5V supply, and RS-232-
compatible performance with a supply voltage as low
as +2.5V. The dual charge pump requires only four,
small 0.1µF capacitors for operation from a +3.0V sup-
ply. Each device is guaranteed to run at data rates of
250kbps while maintaining RS-232 output levels.
The MAX3230E/AE and MAX3231E/AE offer a separate
power-supply input for the logic interface, allowing con-
figurable logic levels on the receiver outputs and trans-
mitter inputs. Operating over a +1.65V to V_CC range, V_L
provides the MAX3230E/AE and MAX3231E/AE com-
patibility with multiple logic families.
The MAX3231E/AE contains one receiver and one trans-
mitter. The MAX3230E/AE contains two receivers and two
transmitters. The MAX3230E/AE and MAX3231E/AE are
available in tiny chip-scale and WLP packaging and are
specified across the extended industrial (-40°C to +85°C)
temperature range.
Applications
Personal Digital Assistants
Cell-Phone Data Lump Cables
Set-Top Boxes
Handheld Devices
Cell Phones
Typical Operating Circuits continued at end of data sheet.
Pin Configurations appear at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
Features
♦ 6 x 5 Chip-Scale Package (UCSP) and WLP
Package
♦ ESD Protection for RS-232 I/O Pins
±15kV—IEC 1000-4-2 Air-Gap Discharge
±8kV—IEC 1000-4-2 Contact Discharge
±15kV—Human Body Model
♦ 1µA Low-Power AutoShutdown
♦ 250kbps Guaranteed Data Rate
♦ Meet EIA/TIA-232 Specifications Down to +3.1V
♦ RS-232 Compatible to +2.5V Allows Operation
from Single Li+ Cell
♦ Small 0.1µF Capacitors
♦ Configurable Logic Levels
Ordering Information
PART
TEMP RANGE BUMP-PACKAGE
MAX3230EEBV-T
-40°C to +85°C 6 x 5 UCSP
MAX3230AEEWV+-T -40°C to +85°C 6 x 5 WLP
MAX3231EEBV-T
-40°C to +85°C 6 x 5 UCSP
MAX3231AEEWV+-T -40°C to +85°C 6 x 5 WLP
+Denotes a lead-free/RoHS-compliant package.
T = Tape-and-reel.
Typical Operating Circuits
2.5V TO 5.5V 1.65V TO 5.5V
CBYPASS
C1
0.1μF
C2
0.1μF
TTL/CMOS
INPUTS
0.1μF
0.1μF
A1
C1 _C1+
VCC
A5
VL
B1
V+
D1 _C1-
A2 _C2+
A3 _C2-
A6 T1IN
MAX3230E/AE
A4
V-
VL
T1OUT E3
B6 T2IN
VL
T2OUT E4
D6 R1OUT
VL
R1IN E6
C3
0.1μF
C4
0.1μF
RS-232
OUTPUTS
TTL/CMOS
OUTPUTS
C6 R2OUT
5kΩ
VL
RS-232
INPUTS
R2IN E5
B5 FORCEON
5kΩ
INVALID ^E2
FORCEOFF C5
GND
E1
TO POWER-
MANAGEMENT
UNIT
VL
________________________________________________________________ Maxim Integrated Products 1
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