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TRS3253E

更新时间： 2024-11-09 03:58:31
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德州仪器 - TI /
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19页 637K
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RS-232 TRANSCEIVER WITH SPLIT SUPPLY PIN FOR LOGIC SIDE

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TRS3253E 数据手册

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TRS3253E  
www.ti.com .............................................................................................................................................. SLLS850A–JANUARY 2008–REVISED OCTOBER 2008  
RS-232 TRANSCEIVER WITH SPLIT SUPPLY PIN FOR LOGIC SIDE  
1
FEATURES  
RSM PACKAGE  
(TOP VIEW)  
•
VL Pin for Compatibility With Mixed-Voltage  
Systems Down to 1.8 V on Logic Side  
•
Enhanced ESD Protection on RIN Inputs and  
DOUT Outputs  
–
–
–
±8 kV IEC 61000-4-2 Air-Gap Discharge  
±8 kV IEC 61000-4-2 Contact Discharge  
±15 kV Human-Body Model  
32 31 30 29 28 27 26 25  
1
2
3
24  
NC  
C2+  
C2–  
V–  
•
•
•
Low 300-µA Supply Current  
Specified 1000-kbps Data Rate  
Auto Powerdown Plus Feature  
23 DOUT2  
22 DOUT3  
21 RIN1  
DIN1 4  
5
20  
RIN2  
DIN2  
6
7
8
19 RIN3  
18 RIN4  
INVALID  
DIN3  
APPLICATIONS  
17  
RIN5  
NC  
•
•
•
•
•
Hand-Held Equipment  
PDAs  
Cell Phones  
Battery-Powered Equipment  
Data Cables  
9 10 11 1213 14 15 16  
NC – No internal connection  
DESCRIPTION/ORDERING INFORMATION  
The TRS3253E is a three-driver and five-receiver RS-232 interface device, with split supply pins for mixed-signal  
operations. All RS-232 inputs and outputs are protected to ±8 kV using the IEC 61000-4-2 Air-Gap Discharge  
method, ±8 kV using the IEC 61000-4-2 Contact Discharge method, and ±15 kV using the Human-Body Model.  
The charge pump requires only four small 0.1-µF capacitors for operation from a 3.3-V supply. The TRS3253E is  
capable of running at data rates up to 1000 kbps, while maintaining RS-232-compliant output levels.  
The TRS3253E has a unique VL pin that allows operation in mixed-logic voltage systems. Both driver in (DIN)  
and receiver out (ROUT) logic levels are pin programmable through the VL pin. This eliminates the need for  
additional voltage level shifter while interfacing with low-voltage microcontroller or UARTs. The TRS3253E is  
available in a space-saving QFN package (4 mm × 4 mm RSM).  
Auto-powerdown plus can be disabled when FORCEON and FORCEOFF are high. With auto-powerdown plus  
enabled, the device activates automatically when a valid signal is applied to any receiver or driver input. INVALID  
is high (valid data) if any receiver input voltage is greater than 2.7 V or less than –2.7 V, or has been between  
–0.3 V and 0.3 V for less than 30 µs. INVALID is low (invalid data) if all receiver input voltages are between –0.3  
V and 0.3 V for more than 30 µs. Refer to Figure 5 for receiver input levels.  
ORDERING INFORMATION  
TA  
PACKAGE(1)(2)  
QFN – RSM  
ORDERABLE PART NUMBER  
TRS3253ERSMR  
TOP-SIDE MARKING  
–40°C to 85°C  
RS53EI  
(1) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.  
(2) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI  
website at www.ti.com.  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCT PREVIEW information concerns products in the  
Copyright © 2008, Texas Instruments Incorporated  
formative or design phase of development. Characteristic data and  
other specifications are design goals. Texas Instruments reserves  
the right to change or discontinue these products without notice.  
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TRS3253E 替代型号

型号 品牌 替代类型 描述 数据表
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