19-2139; Rev 0; 8/01
鹵15kV ESD-Protected +2.5V to +5.5V
RS-232 Transceivers in UCSP
General Description
The MAX3228E/MAX3229E are +2.5V to +5.5V pow-
ered EIA/TIA-232 and V.28/V.24 communications inter-
faces with low power requirements, high data-rate
capabilities, and enhanced electrostatic discharge
(ESD) protection, in a chip-scale package (UCSP鈩?.
All transmitter outputs and receiver inputs are protect-
ed to 鹵15kV using IEC 1000-4-2 Air-Gap Discharge,
鹵8kV using IEC 1000-4-2 Contact Discharge, and
鹵15kV using the Human Body Model.
The MAX3228E/MAX3229E achieve a 1碌A(chǔ) supply cur-
rent with Maxim鈥檚 AutoShutdown鈩?feature. They save
power without changes to existing BIOS or operating
systems by entering low-power shutdown mode when
the RS-232 cable is disconnected, or when the trans-
mitters 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 0.1碌F 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 MAX3228E/MAX3229E offer a separate power-sup-
ply input for the logic interface, allowing configurable
logic levels on the receiver outputs and transmitter
inputs. Operating over a +1.65V to V
CC
range, V
L
pro-
vides the MAX3228E/MAX3229E compatibility with mul-
tiple logic families.
The MAX3229E contains one receiver and one transmit-
ter. The MAX3228E contains two receivers and two
transmitters. The MAX3228E/MAX3229E are available
in tiny chip-scale packaging and are specified across
the extended industrial temperature range of -40擄C to
+85擄C.
o
6
鉁?/div>
5 Chip-Scale Packaging (UCSP)
o
ESD Protection for RS-232 I/O Pins:
鹵15kV鈥擨EC 1000-4-2 Air-Gap Discharge
鹵8kV鈥擨EC 1000-4-2 Contact Discharge
鹵15kV鈥擧uman Body Model
o
1碌A(chǔ) Low-Power AutoShutdown
o
250kbps Guaranteed Data Rate
o
Meets EIA/TIA-232 Specifications Down to +3.1V
o
RS-232 Compatible to +2.5V Allows Operation
from Single Li+ Cell
o
Small 0.1碌F Capacitors
o
Configurable Logic Levels
Features
MAX3228E/MAX3229E
Ordering Information
PART
MAX3228EE
BV
MAX3229EE
BV
TEMP. RANGE
-40擄C to +85擄C
-40擄C to +85擄C
PIN-
PACKAGE
6
鉁?/div>
5 UCSP*
6
鉁?/div>
5 UCSP*
*Requires solder temperature profile described in the Absolute
Maximum Ratings section.
*UCSP reliability is integrally linked to the user鈥檚 assembly
methods, circuit board material, and environment. Refer to the
UCSP Reliabilitly Notice in the UCSP Reliability section of this
data sheet for more information.
Typical Operating Circuits
2.5V TO 5.5V 1.65V TO 5.5V
0.1碌F
C
BYPASS
0.1碌F
A1
C1
C1
0.1碌F
D1
A2
C1+
C1-
C2+
C2-
V
L
T1OUT
V
L
B6 T2IN
V
L
D6 R1OUT
R1IN
E6
T2OUT E4
E3
RS-232
OUTPUTS
V
CC
A5
V
L
V+
B1
C3
0.1碌F
A4
C4
0.1碌F
MAX3228E
V-
Applications
Personal Digital Assistants
Cell Phone Data Lump Cables
Set-Top Boxes
Hand-Held Devices
Cell Phones
Typical Operating Circuits continued at end of data sheet.
Pin Configurations appear at end of data sheet.
C2
0.1碌F
A3
A6 T1IN
TTL/CMOS
INPUTS
TTL/CMOS
OUTPUTS
C6 R2OUT
V
L
5k鈩?/div>
R2IN E5
RS-232
INPUTS
5k鈩?/div>
V
L
20碌A(chǔ)
V
L
INVALID
20碌A(chǔ)
E2
TO POWER-
MANAGEMENT
UNIT
V
L
UCSP is a trademark of Maxim Integrated Products, Inc.
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
B5 FORCEON
GND
E1
FORCEOFF C5
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.
MAX3228E PDF文件相關(guān)型號
MAX3228EEBV,MAX3229E,MAX3229EEBV
MAX3228E相關(guān)型號PDF文件下載
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