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MAX3228E

更新时间： 2024-11-22 22:36:07
品牌 Logo 应用领域
美信 - MAXIM /
页数 文件大小 规格书
15页 251K
描述
【15kV ESD-Protected @.5V to %.5V RS-232 Transceivers in UCSP

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MAX3228E 数据手册

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19-2139; Rev 0; 8/01  
±±15k EꢀDꢁ-rotected +2.1k to +1.1k  
Rꢀꢁ232 Transceivers in UCꢀ-  
General Description  
Features  
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™).  
All transmitter outputs and receiver inputs are protect-  
ed to ±±5kV using IEC ±111-4-2 Air-ꢀap Discharge,  
±8kV using IEC ±111-4-2 Contact Discharge, and  
±±5kV using the ꢁuman ꢂodꢃ Model.  
o 6 ✕ 5 Chip-Scale Packaging (UCSP)  
o ESD Protection for RS-232 I/O Pins:  
±±5kꢀVIEC ±111-ꢁ-2 ꢂir-ꢃap Discharge  
±ꢄkꢀVIEC ±111-ꢁ-2 Contact Discharge  
±±5kꢀV—Huan ꢅoꢆd ꢇoꢆel  
o ±µꢂ Low-Power ꢂHtoShHtꢆown  
o 251kbps ꢃHaranteeꢆ Data Rate  
The MAX3228E/MAX3229E achieve a ±µA supplꢃ cur-  
rent with Maxim’s AutoShutdown™ feature. Theꢃ save  
power without changes to existing ꢂIOS or operating  
sꢃstems bꢃ entering low-power shutdown mode when  
the RS-232 cable is disconnected, or when the trans-  
mitters of the connected peripherals are off.  
o ꢇeets EIꢂ/TIꢂ-232 Specifications Down to +3.±ꢀ  
o RS-232 Coupatible to +2.5ꢀ ꢂllows Operation  
frou Single Li+ Cell  
o Suall 1.±µF Capacitors  
o ConfigHrable Logic Levels  
The transceivers have a proprietarꢃ low-dropout trans-  
mitter output stage, delivering RS-232 compliant perfor-  
mance from a +3.±V to +5.5V supplꢃ, and RS-232  
compatible performance with a supplꢃ voltage as low  
as +2.5V. The dual charge pump requires onlꢃ four  
small 1.±µF capacitors for operation from a +3.1V sup-  
plꢃ. Each device is guaranteed to run at data rates of  
251kbps while maintaining RS-232 output levels.  
Ordering Information  
PIN-  
PACKAGE  
PART  
TEMP. RANGE  
MAX3228EEBV  
MAX3229EEBV  
-40°C to +85°C  
-40°C to +85°C  
6 ✕ 5 UCSP*  
6 ✕ 5 UCSP*  
*Requires solder temperature profile described in the Absolute  
Maximum Ratings section.  
The MAX3228E/MAX3229E offer a separate power-sup-  
plꢃ input for the logic interface, allowing configurable  
logic levels on the receiver outputs and transmitter  
*UCSP reliability is integrally linked to the user’s 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.  
inputs. Operating over a +±.65V to V  
range, V pro-  
L
CC  
vides the MAX3228E/MAX3229E compatibilitꢃ with mul-  
tiple logic families.  
Typical Operating Circuits  
The MAX3229E contains one receiver and one transmit-  
ter. The MAX3228E contains two receivers and two  
transmitters. The MAX3228E/MAX3229E are available  
in tinꢃ chip-scale packaging and are specified across  
the extended industrial temperature range of -41°C to  
+85°C.  
2.5V TO 5.5V 1.65V TO 5.5V  
0.1µF  
C
0.1µF  
BYPASS  
A1  
A5  
V
V
C1  
CC  
B1  
A4  
L
C1+  
V+  
C3  
0.1µF  
C1  
0.1µF  
D1  
A2  
C1-  
C2+  
MAX3228E  
V-  
C2  
0.1µF  
C4  
0.1µF  
Applications  
V
L
A3  
C2-  
T1OUT  
A6 T1IN  
E3  
Personal Digital Assistants  
Cell Phone Data Lump Cables  
Set-Top ꢂoxes  
RS-232  
OUTPUTS  
TTL/CMOS  
INPUTS  
V
L
B6  
T2IN  
T2OUT E4  
V
L
R1IN  
D6 R1OUT  
E6  
ꢁand-ꢁeld Devices  
5kΩ  
TTL/CMOS  
OUTPUTS  
RS-232  
INPUTS  
V
L
C6  
R2OUT  
R2IN E5  
5kΩ  
Cell Phones  
Typical Operating Circuits continued at end of data sheet.  
Pin Configurations appear at end of data sheet.  
V
V
L
L
TO POWER-  
MANAGEMENT  
UNIT  
E2  
INVALID  
20µA  
20µA  
FORCEON  
B5  
FORCEOFF C5  
V
L
UCSP is a trademark of Maxim Integrated Products, Inc.  
GND  
E1  
AutoShutdown is a trademark 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.  
1234567...15

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