±9-2±39; Rev 2; ±1/18
±±15k EꢀDꢁ-rotected +2.1k to +1.1k
Rꢀꢁ232 Transceivers in UCꢀ- and WL-
8/MX329AE
General Description
Features
♦ 6 ✕ 5 Chip-Scale Package (UCSP) and WLP
The MAX3228E/AE and MAX3229E/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 ±±5kV using IEC ±111-4-2 Air-
Gap Discharge, ±8kV using IEC ±111-4-2 Contact
Discharge, and ±±5kV using the ꢀuman ꢁodꢂ Model.
Package
♦ ESD Protection for RS-232 I/O Pins:
±±5kꢀVIEC ±111-ꢁ-2 ꢂir-ꢃap Discharge
±ꢄkꢀVIEC ±111-ꢁ-2 Contact Discharge
±±5kꢀV—Huan ꢅodꢆ ꢇodel
♦ ±µꢂ Low-Power ꢂHtoShHtdown
♦ 251kbps ꢃHaranteed Data Rate
♦ ꢇeets EIꢂ/TIꢂ-232 Specifications Down to +3.±ꢀ
The MAX3228E/AE and MAX3229E/AE achieve a ±µA
supplꢂ current with Maxim’s AutoShutdown™ feature.
Theꢂ save power without changes to existing ꢁIOS or
operating sꢂstems bꢂ entering low-power shutdown
mode when the RS-232 cable is disconnected, or when
the transmitters of the connected peripherals are off.
♦ RS-232 Coupatible to +2.5ꢀ ꢂllows Operation
frou Single Li+ Cell
♦ Suall 1.±µF Capacitors
♦ ConfigHrable Logic Levels
Ordering Information
The transceivers have a proprietarꢂ low-dropout trans-
mitter output stage, delivering RS-232 compliant perfor-
mance from a +3.±V to +5.5V supplꢂ, and RS-232
compatible performance with a supplꢂ voltage as low
as +2.5V. The dual charge pump requires onlꢂ four
small 1.±µF capacitors for operation from a +3.1V sup-
plꢂ. Each device is guaranteed to run at data rates of
251kbps while maintaining RS-232 output levels.
PꢂRT
TEꢇP RꢂNꢃE
-41°C to +85°C
-41°C to +85°C
-41°C to +85°C
-41°C to +85°C
ꢅUꢇP-PꢂCKꢂꢃE
6 x 5 UCSP*
6 x 5 WLP
ꢇꢂX322ꢄEEꢁV-T
ꢇꢂX322ꢄꢂEEWV+T
ꢇꢂX3229EEꢁV-T
ꢇꢂX3229ꢂEEWV+T
6 x 5 UCSP*
6 x 5 WLP
+Denotes a lead-free/RoꢀS-compliant package.
*Requires solder temperature profile described in the Absolute
Maximum Ratings section.
*UCSP reliabilitꢂ is integrallꢂ linked to the user’s assemblꢂ meth-
ods, circuit board material, and environment. Refer to the UCSP
Reliabilitlꢂ Notice in the UCSP Reliabilitꢂ section of this data
sheet for more information.
The MAX3228E/AE and MAX3229E/AE offer a separate
power-supplꢂ input for the logic interface, allowing con-
figurable logic levels on the receiver outputs and trans-
mitter inputs. Operating over a +±.65V to V
range, V
L
CC
provides the MAX3228E/AE and MAX3229E/AE com-
patibilitꢂ with multiple logic families.
T = Tape and reel.
The MAX3229E/AE contains one receiver and one
transmitter. The MAX3228E/AE contains two receivers
and two transmitters. The MAX3228E/AE and
MAX3229E/AE are available in tinꢂ chip-scale and WLP
packaging and are specified across the extended
industrial temperature range of -41°C to +85°C.
Typical Operating Circuits
2.5V TO 5.5V 1.65V TO 5.5V
0.1μF
C
0.1μF
BYPASS
A1
A5
V
V
L
C1
CC
B1
A4
C1+
V+
C1
0.1μF
C3
0.1μF
D1
A2
C1-
C2+
MAX3228E/AE
Applications
V-
C2
0.1μF
C4
0.1μF
A3
V
L
C2-
Personal Digital Assistants
Cell Phone Data Lump Cables
Set-Top ꢁoxes
T1OUT
A6 T1IN
E3
RS-232
OUTPUTS
TTL/CMOS
INPUTS
V
L
B6
T2IN
T2OUT E4
V
L
R1IN
D6 R1OUT
E6
ꢀandheld Devices
5kΩ
TTL/CMOS
OUTPUTS
RS-232
INPUTS
V
Cell Phones
L
C6
R2OUT
R2IN E5
5kΩ
Tꢆpical Operating CircHits continHed at end of data sheet.
Pin ConfigHrations appear at end of data sheet.
V
L
V
L
TO POWER-
MANAGEMENT
UNIT
E2
INVALID
20μA
20μA
FORCEON
UCSP is a trademark of Maxim Integrated Products, Inc.
B5
FORCEOFF C5
V
L
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
GND
E1
________________________________________________________________ ꢇaxiu Integrated ProdHcts
±
For pricing, deliverꢆ, and ordering inforuation, please contact ꢇaxiu Direct at ±-ꢄꢄꢄ-629-ꢁ6ꢁ2,
or visit ꢇaxiu’s website at www.uaxiu-ic.cou.
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