FT3243S Low Power +3V to +5.5V, 3D, 5R 250kbps RS232 Transceiver IC
Datasheet
Version 1.0
Document No.: FT_000635 Clearance No.: FTDI# 342
Future Technology
Devices International Ltd
.
FT3243S
(
Low
Power +3V to +5.5V, 3D, 5R 250kbps
RS232 Transceiver IC
)
The FT3243S is a low power +3V to
+5.5V RS232 transceiver with the
following advanced features:
Meets or exceeds the EIA/TIA-323F and CCITT
V.28/V.24 Specifications for Vcc at +3.3V +/-
10%.
Interoperable with EIA/TIA-232 and adheres
to EIA/TIA-562 down to a +2.7V power
source.
Low quiescent current, 0.5mA (typical) and
1mA (max).
Low shutdown current, 1uA (typical) and 10uA
(max).
3 channels for driving RS232 data
5 channels for receiving RS232 data
Data transfer rates up to 250kbps.
Switch-capacitor regulated voltage converters.
Latch-up free.
ESD Protection for RS232 IO’s
+/-15kV Human Body Model (HBM)
+/-15kV IEC1000-4-2 Air Gap Discharge
+/-8kV IEC1000-4-2 Contact Discharge
Drop-in replacement for MAX3243E, ICL3243E,
ISL4243E, ST3243E, SP3243E and ZT3243E
ONLY AVAILABLE AS PART OF THE USB-DUO KIT
(FT231X +FT4232E)
Neither the whole nor any part of the information contained in, or the product described in this manual, may be adapted or reproduced
in any material or electronic form without the prior written consent of the copyright holder. This product and its documentation are
supplied on an as-is basis and no warranty as to their suitability for any particular purpose is either made or implied. Future Technology
Devices International Ltd will not accept any claim for damages howsoever arising as a result of use or failure of this product. Your
statutory rights are not affected. This product or any variant of it is not intended for use in any medical appliance, device or system in
which the failure of the product might reasonably be expected to result in personal injury. This document provides preliminar y
information that may be subject to change without notice. No freedom to use patents or other intellectual property rights is implied by
the publication of this document. Future Technology Devices International Ltd, Unit 1, 2 Seaward Place, Centurion Business Park,
Copyright © 2013 Future Technology Devices International Limited
1
FT3243S Low Power +3V to +5.5V, 3D, 5R 250kbps RS232 Transceiver IC
Datasheet
Version 1.0
Document No.: FT_000635 Clearance No.: FTDI# 342
Glasgow G41 1HH United Kingdom. Scotland Registered Company Number: SC136640
Copyright © 2013 Future Technology Devices International Limited
2
FT3243S Low Power +3V to +5.5V, 3D, 5R 250kbps RS232 Transceiver IC
Datasheet
Version 1.0
Document No.: FT_000635 Clearance No.: FTDI# 342
1
Typical Applications
RS232 interface designs
USB to RS232 converter cables (with FT231X)
Data cables
ePOS adapters
1.1 Part Numbers
Part Number
Package
FT3243S
Table 1.1 Part numbers
28 Pin SSOP
Note: Packaging is per reel:
Taped and Reel, SSOP is 3,000pcs per reel.
Must be purchased as part of USB-DUO Kit.
Only full reels available.
Copyright © 2013 Future Technology Devices International Limited
3
FT3243S Low Power +3V to +5.5V, 3D, 5R 250kbps RS232 Transceiver IC
Datasheet
Version 1.0
Document No.: FT_000635 Clearance No.: FTDI# 342
Table of Contents
1
2
Typical Applications ........................................................................ 3
1.1
2.1
2.2
Part Numbers...................................................................................... 3
28-LD SSOP Package .......................................................................... 5
SSOP Package Pin Out Description...................................................... 5
Switch-Capacitor Regulated Voltage ................................................... 7
Controlled Power Down ...................................................................... 7
ESD Immunity..................................................................................... 7
Output Control Truth Table ................................................................. 8
Absolute Maximum Ratings................................................................. 9
Electrical Characteristics .................................................................. 10
SSOP-28 Package Mechanical Dimensions ........................................ 13
Package Markings ............................................................................. 14
Solder Reflow Profile ........................................................................ 15
Device Pin Out and Signal Description ............................................ 5
3
Function Description ....................................................................... 7
3.1
3.2
3.3
3.4
4
Devices Characteristics and Ratings................................................ 9
4.1
4.2
5
Package Parameters ..................................................................... 13
5.1
5.2
5.3
6
Contact Information ...................................................................... 16
Appendix A - References ............................................................................ 17
Appendix B - List of Figures and Tables ..................................................... 18
Appendix C - Revision History .................................................................... 19
Copyright © 2013 Future Technology Devices International Limited
4
FT3243S Low Power +3V to +5.5V, 3D, 5R 250kbps RS232 Transceiver IC
Datasheet
Version 1.0
Document No.: FT_000635 Clearance No.: FTDI# 342
2
Device Pin Out and Signal Description
2.1 28-LD SSOP Package
Figure 2.1 SSOP Package Pin Out and Schematic Symbol
2.2 SSOP Package Pin Out Description
Note: The convention used throughout this document for active low signals is the signal name followed by
a#
Pin No.
1
2
3
4
5
6
7
8
9
10
11
Name
C2+
C2-
V-
R1IN
R2IN
R3IN
R4IN
R5IN
T1OUT
T2OUT
T3OUT
Type
PWR
PWR
PWR
Input
Input
Input
Input
Input
Output
Output
Output
Description
Positive terminal of the inverted voltage switch capacitor
Negative terminal of the inverted voltage switch capacitor
Regulated -5.7V output generated by the voltage converter
First RS232 receiver input
Second RS232 receiver input
Third RS232 receiver input
Fourth RS232 receiver input
Fifth RS232 receiver input
First RS232 transmitter output
Second RS232 transmitter output
Third RS232 transmitter output
Copyright © 2013 Future Technology Devices International Limited
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