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: Data transfer rates up to 250kbps. Switch-capacitor regulated voltage converters. Latch-up free. ESD Protection for RS232 IO’s 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 +/-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 Data cables USB to RS232 converter cables (with FT231X) ePOS adapters 1.1 Part Numbers Part Number Package FT3243S 28 Pin SSOP Table 1.1 Part numbers 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 Typical Applications ........................................................................ 3 1.1 2 3 4 5 6 Part Numbers...................................................................................... 3 Device Pin Out and Signal Description ............................................ 5 2.1 28-LD SSOP Package .......................................................................... 5 2.2 SSOP Package Pin Out Description...................................................... 5 Function Description ....................................................................... 7 3.1 Switch-Capacitor Regulated Voltage ................................................... 7 3.2 Controlled Power Down ...................................................................... 7 3.3 ESD Immunity..................................................................................... 7 3.4 Output Control Truth Table ................................................................. 8 Devices Characteristics and Ratings................................................ 9 4.1 Absolute Maximum Ratings................................................................. 9 4.2 Electrical Characteristics .................................................................. 10 Package Parameters ..................................................................... 13 5.1 SSOP-28 Package Mechanical Dimensions ........................................ 13 5.2 Package Markings ............................................................................. 14 5.3 Solder Reflow Profile ........................................................................ 15 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. Name Type Description 1 C2+ PWR Positive terminal of the inverted voltage switch capacitor 2 C2- PWR Negative terminal of the inverted voltage switch capacitor 3 V- PWR Regulated -5.7V output generated by the voltage converter 4 R1IN Input First RS232 receiver input 5 R2IN Input Second RS232 receiver input 6 R3IN Input Third RS232 receiver input 7 R4IN Input Fourth RS232 receiver input 8 R5IN Input Fifth RS232 receiver input 9 T1OUT Output First RS232 transmitter output 10 T2OUT Output Second RS232 transmitter output 11 T3OUT Output Third RS232 transmitter output Copyright © 2013 Future Technology Devices International Limited 5 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 Pin No. Name Type Description 12 T3IN Input Third TTL/CMOS transmitter input 13 T2IN Input Second TTL/CMOS transmitter input 14 T1IN Input First TTL/CMOS transmitter input 15 R5OUT Output Fifth TTL/CMOS receiver output 16 R4OUT Output Fourth TTL/CMOS receiver output 17 R3OUT Output Third TTL/CMOS receiver output 18 R2OUT Output Second TTL/CMOS receiver output 19 R1OUT Output First TTL/CMOS receiver output 20 R2OUTB Output Second TTL/CMOS receiver non-inverting output. Always active 21 INVALID# Output Output of a valid signal detection. INVALID is enabled high if a valid RS232 level is present on any receiver input line 22 SHUTDOWN# Input Shutdown control. A logic LOW to disable drivers and voltage converter. 23 GREEN# Input Set to logic HIGH to keep transmitters on. 24 C1- PWR Negative terminal of the bootstrapped voltage switch capacitor 25 GND PWR Ground pin of the device 26 VCC PWR +3 to 5.5V supply voltage 27 V+ PWR Regulated +5.4V output generated by the voltage converter 28 C1+ PWR Positive terminal of the bootstrapped voltage switch capacitor Table 2.1 Device pinout Copyright © 2013 Future Technology Devices International Limited 6 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 3 Function Description The FT3243S device is a 3V powered EIA/TIA-232 and V.28/V.24 communications interface device tailored for low power designs. The device consists of 3 line drivers, 5 line receivers and switch-capacitor regulated voltage converters. The device operates from a single 3V to 5.5V power supply at guaranteed data rates of 250kbps with enhanced ESD protection on all RS232 IO pins, exceeding +/-15kV IEC10004-2 Air gap discharge and +/-8kV IEC1000-4-2 Contact discharge. 3.1 Switch-Capacitor Regulated Voltage The FT3242S device uses switch-capacitor voltage-controlled source and current sink generators to provide bipolar voltages to maintain compliant EIA/RS232 levels regardless of power supply fluctuations. The design consists of an internally regulated oscillator, a two phase clock cycling, regulated complementary MOS switches, fast switching diode and switch capacitors. The switch capacitor bi-directional current generators operate with smartly regulated CMOS switches and fast switching diode. The efficiency of these bi-directional current generators is greater than 70%. The switching frequency is generated by an internal oscillator and regulated by the current loads. The switch capacitor pump design delivers higher negative bucked voltage than the positive boosted voltage to achieve a balanced voltage controlled source and sink current generators resulting in balanced bipolar voltage supplies to the chip. 3.2 Controlled Power Down FT3243S has a low power shutdown mode controlled by the SHUTDOWN# pin. During shutdown the driver output and the switch-capacitor regulated voltage converter are disabled with the supply current falling to less than 1uA. 3.3 ESD Immunity The RS232 transceiver is usually routed from the serial port connector to the transceiver IC through the metal trace on the PCB. This trace will have some small amount of resistance that will add some protection in terms of limiting transient current to the IC. However for added voltage protection, transient voltage suppressors (TVS) or transorbs are usually necessary to protect the serial port circuitry. The FT3243S includes built-in transient voltage suppression whereby external ESD protection circuitry is not required, allowing for a reduction in bill of materials and PCB area required to realise the design. The FT3243S transceivers meet and exceed the minimum criteria for EN6100-4-2 with +/- 15kV for air gap discharge and +/- 8kV for contact discharge. Copyright © 2013 Future Technology Devices International Limited 7 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 3.4 Output Control Truth Table The following truth table provides the various output control states. GREEN# Valid RC I/P SHUTDOWN# TxOUT RxOUT RxOUTB INVALID# 0 No 1 Z Active Active 0 0 Present 1 Active Active Active 1 1 X 1 Active Active Active X X X 0 Z Z active X Table 3.1 output Control Truth table Copyright © 2013 Future Technology Devices International Limited 8 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 4 Devices Characteristics and Ratings 4.1 Absolute Maximum Ratings The absolute maximum ratings for the FT3243S devices are as follows. These are in accordance with the Absolute Maximum Rating System (IEC 60134). Exceeding these may cause permanent damage to the device. Parameter Value Unit Storage Temperature -65°C to 150°C Degrees C Floor Life (Out of Bag) At Factory Ambient Conditions 168 Hours (30°C / 60% Relative Humidity) (MSL Level 3 Compliant)* Hours Ambient Operating Temperature (Power Applied) -40°C to 85°C Degrees C Power Supply Vcc -0.3V to +6.0V Volts V+ -0.3V to +7.0V Volts V- +0.3V to -7.0V Volts |V+|+|V-| +13.0V Volts Icc (DC Vcc or GND current) +/- 100mA Milliamps TxIN, GREEN#, SHUTDOWN# -0.3V to +6.0V Volts RxIN +/-25V Volts TxOUT +/-15V Volts RxOUT, INVALID# -0.3V to (Vcc+0.3V) Volts Short circuit duration TXOUT Continuous Time IPC/JEDEC J-STD-033A Table 4.1 Absolute Maximum Ratings * If devices are stored out of the packaging beyond this time limit the devices should be baked before use. The devices should be ramped up to a temperature of +125°C and baked for up to 17 hours. Copyright © 2013 Future Technology Devices International Limited 9 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 4.2 Electrical Characteristics Unless otherwise stated Vcc = +3.0V to +5.0V, TA = Tmin to Tmax, C1 to C4 = 0.1uF, typical values apply at Vcc = +3.3V or +5.0V and TA = 25oC Parameter Condition Min Typ Max Units TTL logic input T1IN, T2IN, T3IN, GREEN#, SHUTDOWN# TTL logic output R1OUT, R2OUT, R3OUT, R4OUT, R5OUT, R1OUTB, R2OUTB, INVALID# RS232 input R1IN, R2IN, R3IN, R4IN, R5IN RS232 output T1OUT, T2OUT, T3OUT Charge pump pin C1+, C1-, C2+, C2- Power pin Vcc, GND, V+, V- Charge pump Caps C1+, C1-, C2+, C2- 0.1 0.1 1 uF Temp -40oC to +85oC Industrial grade -40 +25 +85 o Vcc Voltage range Vcc = +5.0V Supply 4.5 5 5.5 V Vcc = +3.3V Supply 3 3.3 3.6 V C Supply current TTL inputs = Vcc/GND, RS232 input = float, Vcc = 3.3V 0.5 1 mA Supply current, AUTOGREEN disabled GREEN# = Vcc; SHUTDOWN# = Vcc TTL inputs = Vcc/GND, RS232 input = float, Vcc = 3.3V 0.5 1 mA Supply current, AUTOGREEN enabled GREEN# = GND;SHUTDOWN# = Vcc TTL inputs = Vcc/GND, RS232 input = float, Vcc = 3.3V 1 10 uA Supply current, SHUTDOWN# enabled GREEN# = Vcc/GND;SHUTDOWN# = GND; TTL inputs = Vcc/GND, RS232 input = float, Vcc = 3.3V 1 10 uA 0.8 V TTL LOGIC INPUT Input threshold low Input threshold high Vcc = +5.0V supply 2.4 V Input threshold high Vcc = +3.3V supply 2 V Input hysteresis Input leakage current 0.5 Vin = Vcc and GND, TIN, GREEN#, SHUTDOWN# +/0.01 V +/-1 mA Copyright © 2013 Future Technology Devices International Limited 10 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 Parameter Condition Min Typ Max Units TTL LOGIC OUTPUT Output voltage low Iout = 1.6mA Output voltage high Iout = -1.0mA Output leakage current Receiver outputs disabled, Vout = Vcc or GND, SHUTDOWN# = GND 0.4 Vcc0.6 Vcc0.1 +/0.05 V V +/-10 uA +25 V Receiver input Input voltage range TA = Tmin-Tmax -25 Input threshold low TA = 25oC, Vcc=5.0V 0.8 1.5 V TA = 25oC, Vcc=3.3V 0.6 1.2 V Input threshold high TA = 25oC Input hysteresis TA = 25oC Input resistance Vin = +/-25V, TA = 25oC 3 Output voltage swing RL = 3kΩ, All outputs are loaded +/-5 V Output resistance Vcc = V+ = V- = GND, VOUT = +/2V 300 Ω Output short circuit current VOUT = GND Output leakage current Transmitter disabled, VOUT = +/12V 2.4 0.5 V V 7 kΩ Transmitter output +/-5 +/-60 mA +/-25 uA Mouse driving ability Transmitter output voltage T1IN = T2IN = GND; T3IN = Vcc;T3OUT = 3kΩ;T1OUT = T2OUT = -2.5mA +/-5 V Maximum Data rate RL = 3~7kΩ, CL = 50pF~1000pF; DR/RC switching, TA = 25oC 250 kbps Transition region slew rate RL = 3~7kΩ, CL = 150pF~1000pF; one transmitter switching, TA = 25oC, measured from 3V to -3V or -3V to 3V 6 Timing Characteristics 30 V/us Copyright © 2013 Future Technology Devices International Limited 11 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 Parameter Condition Min Typ Max Units Transmitter propagation tPLH RL = 3kΩ, CL = 1000pF; All loaded 2 us Transmitter propagation tPHL RL = 3kΩ, CL = 1000pF; All loaded 2 us Transmitter skew tPHL - tPLH 100 ns Transmitter output enable time 400 ns Transmitter output disable time 250 ns Receiver propagation tPLH CL = 150pF 0.15 us Receiver propagation tPHL CL = 150pF 0.15 us Receiver skew tPHL - tPLH 50 ns Receiver output enable time 200 ns Receiver output disable time 200 ns AUTOGREEN TIMING Receiver input to INVALID output high 1 us Receiver input to INVALID output low 30 us Power save mode to transmitter enabled 100 us ESD HBM +/-15 kV IEC 1000-4-2 Contact discharge +/-8 kV IEC 1000-4-2 Air gap discharge +/-8 kV ESD tolerance Table 4.2 Electrical Characteristics Copyright © 2013 Future Technology Devices International Limited 12 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 5 Package Parameters The FT3243S is available in a 28 pin SSOP package. The solder reflow profile for the package is described in Section 5.3. 5.1 SSOP-28 Package Mechanical Dimensions Figure 5.1 SSOP-28 Package Dimensions The FT3243S is supplied in a RoHS compliant 28 pin SSOP package. The package is lead (Pb) free and uses a ‘green’ compound. The package is fully compliant with European Union directive 2002/95/EC. This package is nominally 10.20mm x 5.30mm body (10.20mm x 7.80mm including pins). The pins are on a 0.65 mm pitch. The above mechanical drawing shows the SSOP-28 package. Copyright © 2013 Future Technology Devices International Limited 13 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 5.2 Package Markings 28 15 Line 1 – FTDI Logo Line 2 – Date Code, Revision Line 3 – Wafer Lot Number FT3243S 1 Line 4 – FTDI Part Number 14 Figure 5.2 SSOP-28 Package Markings Notes: 1. 2. YYWW = Date Code, where YY is year and WW is week number Marking alignment should be centre justified Copyright © 2013 Future Technology Devices International Limited 14 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 5.3 Solder Reflow Profile The FT3243S is supplied in Pb free 28 LD SSOP package. The recommended solder reflow profile for both package options is shown in 5.3. Temperature, T (Degrees C) tp Tp Critical Zone: when T is in the range TL to Tp Ramp Up TL tL TS Max Ramp Down TS Min tS Preheat 25 T = 25º C to TP Time, t (seconds) Figure 5.3 FT3243 Solder Reflow Profile The recommended values for the solder reflow profile are detailed in Table 5.1. Values are shown for both a completely Pb free solder process (i.e. the FT240X is used with Pb free solder), and for a non-Pb free solder process (i.e. the FT240X is used with non-Pb free solder). Profile Feature Pb Free Solder Process Non-Pb Free Solder Process 3°C / second Max. 3°C / Second Max. Preheat - Temperature Min (Ts Min.) - Temperature Max (Ts Max.) - Time (ts Min to ts Max) 150°C 200°C 60 to 120 seconds 100°C 150°C 60 to 120 seconds Time Maintained Above Critical Temperature TL: - Temperature (TL) - Time (tL) 217°C 60 to 150 seconds 183°C 60 to 150 seconds 260°C 240°C 20 to 40 seconds 20 to 40 seconds 6°C / second Max. 6°C / second Max. 8 minutes Max. 6 minutes Max. Average Ramp Up Rate (Ts to Tp) Peak Temperature (Tp) Time within 5°C of actual Peak Temperature (tp) Ramp Down Rate Time for T= 25°C to Peak Temperature, Tp Table 5.1 Reflow Profile Parameter Values Copyright © 2013 Future Technology Devices International Limited 15 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 6 Contact Information Branch Office – Tigard, Oregon, USA Head Office – Glasgow, UK Future Technology Devices International Limited Unit 1, 2 Seaward Place, Centurion Business Park Glasgow G41 1HH United Kingdom Tel: +44 (0) 141 429 2777 Fax: +44 (0) 141 429 2758 Future Technology Devices International Limited (USA) 7130 SW Fir Loop Tigard, OR 97223 USA Tel: +1 (503) 547 0988 Fax: +1 (503) 547 0987 E-mail (Sales) E-mail (Support) E-mail (General Enquiries) E-Mail (Sales) E-Mail (Support) E-Mail (General Enquiries) [email protected] [email protected] [email protected] Branch Office – Taipei, Taiwan Future Technology Devices International Limited (Taiwan) 2F, No. 516, Sec. 1, NeiHu Road Taipei 114 Taiwan , R.O.C. Tel: +886 (0) 2 8791 3570 Fax: +886 (0) 2 8791 3576 E-mail (Sales) E-mail (Support) E-mail (General Enquiries) [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] Branch Office – Shanghai, China Future Technology Devices International Limited (China) Room 408, 317 Xianxia Road, Shanghai, 200051 China Tel: +86 21 62351596 Fax: +86 21 62351595 E-mail (Sales) E-mail (Support) E-mail (General Enquiries) [email protected] [email protected] [email protected] Web Site http://ftdichip.com System and equipment manufacturers and designers are responsible to ensure that their systems, and any Future Technology Devices International Ltd (FTDI) devices incorporated in their systems, meet all applicable safety, regulatory and system-level performance requirements. All application-related information in this document (including application descriptions, suggested FTDI devices and other materials) is provided for reference only. While FTDI has taken care to assure it is accurate, this information is subject to customer confirmation, and FTDI disclaims all liability for system designs and for any applications assistance provided by FTDI. Use of FTDI devices in life support and/or safety applications is entirely at the user’s risk, and the user agrees to defend, indemnify and hold harmless FTDI from any and all damages, claims, suits or expense resulting from such use. This document is subject to change without notice. No freedom to use patents or other intellectual property rights is implied by the publication of this document. Neither the whole nor any part of the information contained in, or the product described in this document, may be adapted or reproduced in any material or electronic form without the prior written consent of the copyright holder. Future Technology Devices International Ltd, Unit 1, 2 Seaward Place, Centurion Business Park, Glasgow G41 1HH, United Kingdom. Scotland Registered Company Number: SC136640 Copyright © 2013 Future Technology Devices International Limited 16 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 Appendix A - References http://www.ftdichip.com/FT-X.htm http://www.ftdichip.com/Support/Documents/DataSheets/ICs/DS_FT231X.pdf Copyright © 2013 Future Technology Devices International Limited 17 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 Appendix B - List of Figures and Tables List of Figures Figure 2.1 SSOP Package Pin Out and Schematic Symbol ................................................................... 5 Figure 5.1 SSOP-28 Package Dimensions ....................................................................................... 13 Figure 5.2 SSOP-28 Package Markings .......................................................................................... 14 Figure 5.3 FT3243 Solder Reflow Profile ......................................................................................... 15 List of Tables Table 1.1 Part numbers ................................................................................................................. 3 Table 2.1 Device pinout ................................................................................................................. 6 Table 3.1 output Control Truth table ............................................................................................... 8 Table 4.1 Absolute Maximum Ratings .............................................................................................. 9 Table 4.2 Electrical Characteristics ................................................................................................ 12 Table 5.1 Reflow Profile Parameter Values ..................................................................................... 15 Copyright © 2013 Future Technology Devices International Limited 18 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 Appendix C - Revision History Document Title: Low Power +3V to +5.5V, 3D, 5R 250kbps RS232 Transceiver IC FT3243S Document Reference No.: FT_000635 Clearance No.: FTDI# 342 Product Page: http://www.ftdichip.com/FT-X.htm Document Feedback: Send Feedback Version 1.0 Initial Datasheet Created June 2013 Copyright © 2013 Future Technology Devices International Limited 19