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MAX3387

更新时间： 2024-11-12 22:55:23
品牌 Logo 应用领域
美信 - MAXIM 光电二极管手机
页数 文件大小 规格书
16页 182K
描述
3V, 【15kV ESD-Protected, AutoShutdown Plus RS-232 Transceiver for PDAs and Cell Phones

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MAX3387 数据手册

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±9-±16±; Rev ±; ±0/99  
3V, ±±15V EꢀDꢁ-rotected, Autoꢀhutdown -lus  
Rꢀꢁ232 Transceiver for -DAs and Cell -hones  
MAX387E  
General Description  
Features  
The MAX3387E 3V powered EIA/TIA-232 and V.28/V.24  
is a communications interface with low power require-  
ments, high data-rate capabilities, and enhanced elec-  
trostatic discharge (ESD) protection. The MAX3387E  
has three receivers and three transmitters. All RS-232  
inputs and outputs are protected to ±±15V using the  
IEC ±000-4-2 Air-Gap Discharge method, ±85V using  
the IEC ±000-4-2 Contact Discharge method, and  
±±15V using the ꢀuman ꢁodꢂ Model.  
♦ V Pin for Compatibility with Mixed-Voltage  
L
Systems  
♦ ±15kV ESD Protection on Rx Inputs and Tx Outputs  
♦ Low 300µA Supply Current  
♦ Guaranteed 250kbps Data Rate  
♦ 1µA AutoShutdown Plus™ with Receivers Active  
♦ Meets EIA/TIA-232 Specifications Down to 3.0V  
A proprietarꢂ low-dropout transmitter output stage  
enables true RS-232 performance from a +3.0V to  
+1.1V supplꢂ with a dual charge pump. The charge  
pump requires onlꢂ four small 0.±µF capacitors for  
operation from a +3.3V supplꢂ. The MAX3387E is capa-  
ble of running at data rates up to 2105bps while main-  
taining RS-232 compliant output levels.  
Ordering Information  
PART  
TEMP. RANGE  
PIN-PACKAGE  
MAX3387ECUG  
MAX3387EEUG  
0°C to +70°C  
24 TSSOP  
The MAX3387E has a unique V pin that allows interop-  
L
-40°C to +81°C  
24 TSSOP  
eration in mixed-logic voltage sꢂstems. ꢁoth input and  
output logic levels are pin programmable through the  
V pin. The MAX3387E is available in a space-saving  
L
TSSOP pac5age.  
Typical Operating Circuit  
Applications  
Subnoteboo5/Palmtop Computers  
PDAs and PDA Cradles  
+3.3V  
23  
15  
24  
C
BYPASS  
V
V
L
FORCEOFF  
CC  
2
6
1
3
4
5
C1+  
V+  
V-  
C1  
0.1µF  
C3  
0.1µF  
Cell Phone Data Cables  
C1-  
C2+  
ꢁatterꢂ-Powered Equipment  
ꢀand-ꢀeld Equipment  
MAX3387E  
C2  
0.1µF  
C4  
0.1µF  
C2-  
Peripherals  
-in Configuration  
7
8
T1OUT  
T2OUT  
T3OUT  
T1IN  
21  
20  
TTL/CMOS  
INPUTS  
T2IN  
T3IN  
RS-232  
OUTPUTS  
TOP VIEW  
C1+  
V+  
1
2
3
4
5
6
7
8
9
24 FORCEOFF  
23  
19  
18  
10  
V
CC  
V
V
L
C1-  
22 GND  
14 R1OUT  
13 R2OUT  
R1IN  
C2+  
21 T1OUT  
20 T2OUT  
19 T3OUT  
18 R1IN  
17 R2IN  
16 R3IN  
MAX3387E  
C2-  
5k  
L
V-  
R2IN  
TTL/CMOS  
OUTPUTS  
17  
16  
RS-232  
INPUTS  
T1IN  
T2IN  
INVALID  
5k  
V
L
12 R3OUT  
R3IN  
T3IN 10  
FORCEON 11  
R3OUT 12  
15 V  
L
9
5k  
14 R1OUT  
13 R2OUT  
INVALID  
FORCEON  
11  
GND  
22  
TSSOP  
AutoShutdown Plus is a trademar5 of Maxim Integrated Products.  
________________________________________________________________ Maxim Integrated Products  
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.  
For small orders, phone 1-800-835-8769.  
1234567...16

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