UM202EExE High ESD-Protected, Fail-Safe, Single Supply RS-232 Transceivers UM202EESE SOP16 UM202EEPE DIP16 UM202EEUE TSSOP16 General Description The UM202EExE series are low power single supply RS232 interface. The device consists of two line drivers, two line receivers, and dual charge pump circuit. The device meets the requirements of TIA/EIA-232 standard and provides the electrical interface between an asynchronous communication controller and the serial-port connector. The on chip charge pump and four small external capacitors act as onboard DC to DC converter, allow chip operated from single 5V supply, eliminating the need for ±10V power supplies, reduce cost and board space. The device operates at data signaling rates over 250Kbps. The slew rate of driver is set internally less than 30V/μs and the receivers feature internal noise filtering, eliminating the need for external slew rate and filter capacitors for reliable operation. The driver inputs and receiver outputs are TTL and CMOS compatible. UM202EExE comes in 16 pin DIP, SOP and TSSOP packages, operating over the commercial and industrial temperature ranges. The ESD tolerance has been upgraded on these devices to over ±15kV for both Human Body Model and IEC61000-4-2 Air Discharge Method, without latch-up. The device operates with four 0.1μF capacitors, reduce system cost and board space. Applications Features Notebook and Palmtop Computers Battery-Powered Equipment Hand-Held Equipment POS terminal ESD Protection for RS-232 Bus Pins up to ±15kV Human Body Model Single +5V Power Supply Low Power, ICC 15mA Maximum Operates up to 250kbps Receiver Noise Filter Latch-Up Performance Exceeds 200mA Ordering Information Part Number UM202EESE Temp. Range -40°C to +85°C Marking Code UM202EESE Package Type SOP16 UM202EEPE -40°C to +85°C UM202EEPE DIP16 UM202EEUE -40°C to +85°C UM202EEUE TSSOP16 ________________________________________________________________________ http://www.union-ic.com Rev.05 Nov.2014 1/11 UM202EExE Absolute Maximum Ratings (Note 1) Symbol Parameter Value Unit VCC Supply Voltage on VCC -0.3 to +6 V V+ Voltage on V+ (VCC - 0.3) to +14 V V- Voltage on V- -14 to +0.3 V T_IN Voltage on T_IN -0.3 to (VCC + 0.3) V R_IN Voltage on R_IN ±30 V T_OUT Voltage on T_OUT (V- - 0.3) to (V+ + 0.3) V R_OUT Voltage on R_OUT -0.3 to (VCC + 0.3) V Short-Circuit Duration, T_OUT Continuous PD Continuous Power Dissipation at TA = 70°C SOP16 696 DIP16 842 TSSOP16 754.7 mW TA Operating Temperature Range -40 to +85 °C TSTG Storage Temperature Range Maximum Lead Temperature for Soldering 10 seconds -65 to +165 °C +300 °C TL Note 1: Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ________________________________________________________________________ http://www.union-ic.com Rev.05 Nov.2014 2/11 UM202EExE Electrical Characteristics (VCC=+5V±10%, C1- C4=0.1uF, TA=TMIN to TMAX, unless otherwise noted. Typical values are at TA=25℃) Parameter Symbol Conditions Min Typ Max Unit DC CHARACTERISTICS No load, TA = +25°C 10 15 mA VCC Supply Current ICC LOGIC Input Leakage T_IN = 0V to VCC ±10 μA Current Input Threshold VIL T_IN 0.8 V Low Input Threshold VIH T_IN 2.0 V High Output Voltage Low VOL R_OUT; IOUT = 3.2mA 0.4 V Output Voltage VOH R_OUT; IOUT = -1.0mA 3.5 VCC-0.4 V High Output Leakage 0V ≤ ROUT≤ VCC ±0.05 ±10 μA Current EIA/TIA-232E RECEIVER INPUTS Input Voltage Range -30 30 V Input Threshold TA = +25°C, Normal 0.8 1.2 V Low VCC = 5V operation Input Threshold TA = +25°C, Normal 1.7 2.4 V High VCC = 5V operation Input Hysteresis VCC = 5V 0.2 0.5 1.0 V Input Resistance TA = +25°C, VCC = 5V 3 5 7 kΩ EIA/TIA-232E TRANSMITTER OUTPUTS Output Voltage All drivers loaded with 3kΩ ±5 ±9 V Swing to ground VCC = V+ = V- = 0V, Output Resistance 300 Ω VOUT = ±2V Output Short-Circuit short to VCC , GND ±70 mA Current or other TXD pin TIMING CHARACTERISTICS RL = 3kΩ to 7kΩ, Maximum Data CL = 50pF to 1000pF, 250 kbps Rate one transmitter switching All parts, Receiver tPLHR, CL = 150pF normal 0.3 μs Propagation Delay tPHLR operation Transmitter tPLHT, RL = 3kΩ, CL = 2500pF, 1.2 μs Propagation Delay tPHLT all transmitters loaded TA = +25°C, VCC = 5V, RL = 3kΩ to 7kΩ, Transition-Region CL = 50pF to 1000pF, 20 30 V/μs Slew Rate measured from -3V to +3V or +3V to -3V, Figure 1 ESD PERFORMANCE TRANSMITTER OUTPUTS, RECEIVER INPUTS Human Body Model ±15 IEC61000-4-2, ESD-Protection ±8 kV Contact Discharge Voltage IEC61000-4-2, ±15 Air-Gap Discharge ________________________________________________________________________ http://www.union-ic.com Rev.05 Nov.2014 3/11 UM202EExE Pin Configurations UM202E SOP16/DIP16/TSSOP16 Pin Descriptions Pin No. SOP/DIP/TSSOP 1,3 2 4,5 6 7,14 8,13 9,12 10,11 15 16 Pin Name C1+, C1V+ C2+, C2VT_OUT R_IN R_OUT T_IN GND VCC Function Terminals for positive charge pump capacitor +2VCC voltage generated by the charge pump Terminals for negative charge pump capacitor -2VCC voltage generated by the charge pump RS-232 Driver Outputs RS-232 Receiver Inputs RS-232 Receiver Outputs RS-232 Driver Inputs Ground +4.5V to +5.5V Supply Voltage Input Detailed Description The UM202EExE consists of three sections: charge-pump voltage converters, drivers, and receivers. These E versions provide extra protection against ESD. They survive ±15kV discharges to the RS-232 inputs and outputs, tested using the Human Body Model. When tested according to IEC61000-4-2, they survive ±8kV contact-discharges and ±15kV air-gap discharges. The rugged E versions are intended for use in harsh environments or applications where the RS-232 connection is frequently changed. The UM202EExE devices have internal charge pump voltage converters which allow them to operate from a single +5V supply. The charge pumps will operate with polarized or non-polarized capacitors ranging from 0.1 to 10μF and will generate the ±9V needed to generate the RS-232 output levels. RS-232 Drivers The drivers are inverting transmitters, which accept TTL or CMOS inputs and output RS-232 signals with an inverted sense relative to the input logic levels. Typically the RS-232 output voltage swing is ±9V. Even under worst case loading conditions of 3kΩ and 2500pF, the output is ________________________________________________________________________ http://www.union-ic.com Rev.05 Nov.2014 4/11 UM202EExE guaranteed to be ±5V, which is consistent with the RS-232 standard specifications. The transmitter outputs are protected against infinite short-circuits to ground without degradation in reliability. The instantaneous slew rate of the transmitter output is internally limited to a maximum of 30V/μs in order to meet the RS-232 standard. The smooth transition of the loaded output from VOL to VOH clearly meets the monotonicity requirements of the RS-232 standard. RS-232 Receivers The receivers convert RS-232 input signals to inverted TTL signals. The input thresholds are 0.8V minimum and 2.4V maximum, again well within the 3V RS-232 requirements. The receiver inputs are also protected against voltage up to 30V. A 5kΩ pull down resistor to ground will commit the output of the receiver to a high state when the pin is float. In actual system applications, it is quite possible for signals to be applied to the receiver inputs before power is applied the receiver circuitry. This occurs, for example, when a PC user attempts to print, only to realize the printer wasn’t turned on. In this case an RS-232 signal from the PC will appear on the receiver input at the printer. When the printer power is turned on, the receiver will operate normally. All of these enhanced devices are fully protected. ESD Protection UM202EExE devices have standard ESD protection structures incorporated on the pins to protect against electrostatic discharges encountered during assembly and handling. In addition, the RS232 bus pins (driver outputs and receiver input) of these devices have an extra level of ESD protection. Advanced ESD structures were designed to successfully protect these pins against ESD discharge of ±15kV Human Body Model when powered down or up. ________________________________________________________________________ http://www.union-ic.com Rev.05 Nov.2014 5/11 UM202EExE Test Circuits + +5V 0.1μF 0.1μF 0.1μF + VCC C1+ + + +5V 0.1μF 0.1μF V+ 0.1μF C1C2+ + UM202E V- + 0.1μF + 0.1μF VCC C2- + + 0.1μF C1C2+ V- 0.1μF + VCC 400k T_ R_ R_OUT V+ UM202E C2- 400k T_IN VCC C1+ T_OUT R_IN Pulse Generator T_IN T_ R_ Pulse Generator 5k R_OUT T_OUT R_IN RL CL 5k CL Receiver Test Circuit Transmitter Test Circuit Figure 1 ________________________________________________________________________ http://www.union-ic.com Rev.05 Nov.2014 6/11 UM202EExE Typical Operating Circuits + +5V C5 + C3 16 1 C1 + 3 4 C2 + 5 VCC C1+ C1C2+ V+ +5V to +10V VOLTAGE DOUBLE +10V to -10V VOLTAGE INVERTER V- 2 C4 6 + C2+5V 400k T1OUT 14 11 T1IN +5V TTL/CMOS INPUTS RS-232 OUTPUTS 400k T2OUT 10 T2IN 7 R1IN 13 12 R1OUT TTL/CMOS OUTPUTS RS-232 INPUTS 5k 9 R2IN R2OUT 8 5k GND 15 Figure 2 Applications Information Capacitor Selection The capacitor type used for C1–C4 is not critical for proper operation. The UM202EExE, require 0.1μF capacitors, although in all cases capacitors up to 10μF can be used without harm. Ceramic dielectrics are suggested for the 0.1μF capacitors. When using the minimum recommended capacitor values, make sure the capacitance value does not degrade excessively as the operating temperature varies. If in doubt, use capacitors with a larger (e.g., 2x) nominal value. The capacitors’ effective series resistance (ESR), which usually rises at low temperatures, influences the amount of ripple on V+ and V-. Use larger capacitors (up to 10μF) to reduce the output impedance at V+ and V-. Bypass VCC to ground with at least 0.1μF capacitor. In applications sensitive to power-supply noise generated by the charge pumps, decouple VCC to ground with a capacitor the same size as (or larger than) the charge pump capacitors (C1–C4). V+ and V- as Power Supplies A small amount of power can be drawn from V+ and V-, although this will reduce both driver output swing and noise margins. Increasing the value of the charge-pump capacitors (up to 10μF) helps maintain performance when power is drawn from V+ or V-. Driving Multiple Receivers Each transmitter is designed to drive a single receiver. Transmitters can be paralleled to drive multiple receivers. High Data Rates These transceivers maintain the RS-232 ±5.0V minimum driver output voltages at data rates of over 250 kbps. ________________________________________________________________________ http://www.union-ic.com Rev.05 Nov.2014 7/11 UM202EExE Package Information UM202EESE SOP16 Outline Drawing H E D L e b A1 A C DIMENSIONS MILLIMETERS INCHES Symbol Min Max Min Max A 1.35 1.75 0.053 0.069 A1 0.10 0.25 0.004 0.010 b 0.35 0.49 0.014 0.019 C 0.19 0.25 0.007 0.010 E 3.80 4.00 0.150 0.157 D 9.80 10.00 0.386 0.394 e 1.27 0.050 H 5.80 6.20 0.228 0.244 L 0.40 1.27 0.016 0.050 6.6 1.5 Land Pattern 0.5 1.27 NOTES: 1. Compound dimension: 9.9×3.9. 2. Unit: mm. 3. General tolerance ±0.05mm unless otherwise specified. 4. The layout is just for reference. Tape and Reel Orientation UM202EESE XX ________________________________________________________________________ http://www.union-ic.com Rev.05 Nov.2014 8/11 UM202EExE UM202EEPE DIP16 Outline Drawing D1 E E1 eA C D A1 L A3 A2 A eB b1 e b DIMENSIONS MILLIMETERS INCHES Symbol Min Max Min Max A 5.08 0.200 A1 0.38 0.015 A2 3.18 4.45 0.125 0.175 A3 1.40 2.03 0.055 0.080 b 0.41 0.56 0.016 0.022 b1 1.14 1.65 0.045 0.065 C 0.20 0.30 0.008 0.012 D 18.92 19.43 0.745 0765 D1 0.13 2.03 0.005 0.080 E 7.62 8.26 0.300 0.325 E1 6.10 7.87 0.240 0.310 e 2.54 0.100 eA 7.62 0.300 eB 10.16 0.400 L 2.92 3.81 0.115 0.150 Tape and Reel Orientation UM202EEPE XX ________________________________________________________________________ http://www.union-ic.com Rev.05 Nov.2014 9/11 UM202EExE UM202EEUE TSSOP16 Outline Drawing DIMENSIONS MILLIMETERS INCHES Symbol Min Max Min Max A 1.20 0.047 A1 0.05 0.15 0.002 0.006 A2 0.90 1.05 0.035 0.041 A3 0.34 0.54 0.013 0.021 D 4.86 5.06 0.191 0.199 E 6.20 6.60 0.244 0.260 E1 4.30 4.50 0.169 0.177 b 0.20 0.28 0.008 0.011 e 0.65BSC 0.026BSC 7.0 1.5 Land Pattern 0.3 0.65 NOTES: 1. Compound dimension: 4.96×4.4. 2. Unit: mm. 3. General tolerance ±0.05mm unless otherwise specified. 4. The layout is just for reference. Tape and Reel Orientation UM202EEUE XX ________________________________________________________________________ http://www.union-ic.com Rev.05 Nov.2014 10/11 UM202EExE IMPORTANT NOTICE The information in this document has been carefully reviewed and is believed to be accurate. Nonetheless, this document is subject to change without notice. Union assumes no responsibility for any inaccuracies that may be contained in this document, and makes no commitment to update or to keep current the contained information, or to notify a person or organization of any update. Union reserves the right to make changes, at any time, in order to improve reliability, function or design and to attempt to supply the best product possible. Union Semiconductor, Inc Add: Unit 606, No.570 Shengxia Road, Shanghai 201210 Tel: 021-51093966 Fax: 021-51026018 Website: www.union-ic.com ________________________________________________________________________ http://www.union-ic.com Rev.05 Nov.2014 11/11