DS14185 DS14185 EIA/TIA-2323 Driver x 5 Receiver Literature Number: SNLS093B DS14185 EIA/TIA-232 3 Driver x 5 Receiver General Description The DS14185 is a three driver, five receiver device which conforms to the EIA/TIA-232-E standard. The flow-through pinout facilitates simple non-crossover board layout. The DS14185 provides a one-chip solution for the common 9-pin serial RS-232 interface between data terminal and data communications equipment. n n n n Flow through pinout Failsafe receiver outputs 20-pin SOIC package LapLink (R) compatible -200 kbps data rate Features n Replaces one 1488 and two 1489s n Conforms to EIA/TIA-232-E n 3 drivers and 5 receivers Connection Diagram Functional Diagram SOIC 01193801 Order Number DS14185WM See NS Package M20B 01193802 LapLink (R) is a registered trademark of Travelling Software. (c) 2004 National Semiconductor Corporation DS011938 www.national.com DS14185 EIA/TIA-232 3 Driver x 5 Receiver April 1999 DS14185 Absolute Maximum Ratings (Note 1) Storage Temperature Range If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Lead Temperature Range (Soldering, 4 seconds) +260C ESD Ratings (HBM, 1.5 k, 100 pF) 1.5 kV Supply Voltage (VCC) +7V Supply Voltage (V+) +15V Supply Voltage (V-) -15V Driver Input Voltage 0V to VCC Driver Output Voltage (Power Off) Recommended Operating Conditions Min 15V 25V Receiver Input Voltage Receiver Output Voltage (ROUT) 0V to VCC Max Units +4.75 +5.0 +5.25 V Supply Voltage (V+) +9.0 +12.0 +13.2 V Supply Voltage (V-) -13.2 -12.0 -9.0 V 0 25 70 C Temperature (TA) 1488 mW Derate M Package Typ Supply Voltage (VCC) Operating Free Air Maximum Package Power Dissipation @ +25C M Package -65C to +150C 11.9 mW/C above +25C Electrical Characteristics (Note 2) Over recommended supply voltage and operating temperature ranges, unless otherwise specified. Symbol Parameter Conditions Min Typ Max Units 21.0 30 mA V = 9V, V = -9V 8.7 15 mA V+ = 13.2V, V- = -13.2V 13 22 mA V+ = 9V, V- = -9V -12.5 -22 mA V+ = 13.2V, V- = -13.2V -16.5 -28 mA DEVICE CHARACTERISTICS ICC I + I- VCC Supply Current + V Supply Current (Note 2) V- Supply Current (Note 2) No Load, All Inputs at +5V No Load, All Driver Inputs at 0.8V or +2V All Receiver Inputs at 0.8V or 2.4V. + - DRIVER CHARACTERISTICS VIH High Level Input Voltage VIL Low Level Input Voltage IIH High Level Input Current 2.0 V VIN = 5V 0.8 V 10 A -1.5 mA (Note 2) IIL Low Level Input Current VIN = 0V -1.24 (Note 2) VOH High Level Output Voltage RL = 3 k, VIN = 0.8V, (Note 2) V+ = 9V, V- = -9V RL = 3 k, VIN = 0.8V, 6 7 V 8.5 9 V 10 11.5 V V+ = +12V, V- = -12V RL = 7 k, VIN = 0.8V, V+ = +13.2V, V- = -13.2V VOL Low Level Output Voltage RL = 3 k, VIN = 2V, (Note 2) V+ = 9V, V- = -9V RL = 3 k, VIN = 2V, + -7 -6 V -8 -7.5 V -11 -10 V - V = +12V, V = -12V RL = 7 k, VIN = 0.8V, V+ = +13.2V, V- = -13.2V IOS+ Output High Short VO = 0V, VIN = 0.8V -6 -13 -18 mA VO = 0V, VIN = 2.0V 6 13 18 mA Circuit Current (Note 2) IOS- Output Low Short Circuit Current (Note 2) www.national.com 2 (Continued) Over recommended supply voltage and operating temperature ranges, unless otherwise specified. Symbol Parameter Conditions Min Typ Max Units DRIVER CHARACTERISTICS RO Output Resistance -2V VO +2V, 300 300 V+ = V- = VCC = 0V -2V VO +2V, V+ = V- = VCC = Open Ckt RECEIVER CHARACTERISTICS VTH Input High Threshold VO 0.4V, IO = 3.2 mA 1.85 2.4 V (Recognized as a High Signal) VTL Input Low Threshold VO 2.5V, IO = -0.5 mA 0.7 1.0 V (Recognized as a Low Signal) RIN Input Resistance VIN = 3V to 15V 3.0 4.1 7.0 k IIN Input Current (Note 2) VIN = +15V 2.1 4.1 5.0 mA VIN = +3V 0.43 0.7 1 mA VIN = -15V -5.0 -4.1 -2.1 mA VIN = -3V -1 -0.65 -0.43 mA IOH = -0.5 mA, VIN = -3V 2.6 4 IOH = -10 A, VIN = -3V 4.0 4.9 V IOH = -0.5 mA, VIN = Open Circuit 2.6 4 V IOH = -10 A, VIN = Open Circuit 4.0 4.9 VOH High Level Output Voltage (Note 7) VOL Low Level Output Voltage IOL = 3.2 mA, VIN = +3V IOSR Short Circuit Current (Note 2) VO = 0V, VIN = 0V -4 V V 0.2 0.4 V -2.7 -1.7 mA Switching Characteristics (Note 2) TA = 25C Symbol Parameter Conditions Min Typ Max Units 60 350 ns 240 350 ns DRIVER CHARACTERISTICS tPHL Propagation Delay High to Low tPLH Propagation Delay Low to High tr, tf Output Slew Rate (Note 8) RL = 3 k, CL = 50 pF (Figures 1, 2) 50 ns RECEIVER CHARACTERISTICS tPHL Propagation Delay High to Low tPLH Propagation Delay Low to High tr Rise Time tf Fall Time RL = 1.5 k, CL = 15 pF (includes fixture plus probe), (Figures 3, 4) 150 350 ns 240 350 ns 87 175 ns 40 100 ns Note 1: Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices should be operated at these limits. The table of Electrical Characteristics specifies conditions of device operation. Note 2: Current into device pins is defined as positive. Current out of device pins is defined as negative. All voltages are referenced to ground unless otherwise specified. For current, minimum and maximum values are specified as an absolute value and the sign is used to indicate direction. For voltage logic levels, the more positive value is designated as maximum. For example, if -6V is a maximum, the typical value (-6.8V) is more negative. Note 3: All typicals are given for: VCC = +5.0V, V+ = +12.0V, V- = -12V, TA = +25C. Note 4: Only one driver output shorted at a time. Note 5: Generator characteristics for driver input: f = 64 kHz (128 kbits/sec), tr = tf < 10 ns, VIH = 3V, VIL = 0V, duty cycle = 50%. Note 6: Generator characteristics for receiver input: f = 64 kHz (128 kbits/sec), tr = tf = 200 ns, VIH = 3V, VIL = -3V, duty cycle = 50%. Note 7: If receiver inputs are unconnected, receiver output is a logic high. Note 8: Refer to typical curves. Driver output slew rate is measured from the +3.0V to the -3.0V level on the output waveform. Inputs not under test are connected to VCC or GND. Slew rate is determined by load capacitance. To comply with a 30 V/s maximum slew rate, a minimum load capacitance of 390 pF is recommended. 3 www.national.com DS14185 Electrical Characteristics (Note 2) DS14185 Parameter Measurement Information 01193803 FIGURE 1. Driver Propagation Delay and Transition Time Test Circuit (Note 5) 01193804 FIGURE 2. Driver Propagation Delay and Transition Time Waveforms Slew Rate (SR) = 6V/(tr or tf) 01193805 FIGURE 3. Receiver Propagation Delay and Transition Time Test Circuit (Note 6) 01193806 FIGURE 4. Receiver Propagation Delay and Transition Time Waveform www.national.com 4 DS14185 Pin Descriptions Pin # 13, 15, 16 Name Description DIN Driver Input Pins DOUT Driver Output Pins, RS-232 Levels RIN Receiver Input Pins, RS-232 Levels 12, 14, 17, 18, 19 ROUT Receiver Output Pins 11 GND Ground 1 V+ Positive Power Supply Pin (+9.0 V+ +13.2) 5, 6, 8 2, 3, 4, 7, 9 Negative Power Supply Pin (-9.0 V- -13.2) - 10 V 20 VCC Positive Power Supply Pin (+5V 5%) VCC = 4.75V, V+ = 10.8V, V- = -10.8V Applications Information In a typical Data Terminal Equipment (DTE) to Data CircuitTerminating Equipment (DCE) 9-pin de-facto interface implementation, 2 data lines and 6 control lines are required. The data lines are TXD and RXD. The control lines are RTS, DTR, DSR, DCD, CTS, and RI. The DS14185 is a 3 x 5 Driver/Receiver and offers a single chip solutuion for this DTE interface. As shown in Figure 5, this interface allows for direct flow-thru interconnect. For a more conservative design, the user may wish to insert ground traces between the signal lines to minimize cross talk. MOUSE DRIVING A typical mouse can be powered from the drivers. Two driver outputs connected in parallel and set to VOH can be used to supply power to the V+ pin of the mouse. The third driver output is set to VOL to sink the current from the V- terminal. Refer to typical curves of VOUT/IOUT.Typical mouse specifications are: 10 mA at +6V 5 mA at -6V LapLink COMPATIBILITY The DS14185 can easily provide 128 kbps data rate under maximum driver load conditions of CL = 2500 pF and RL = 3 k, while power supplies are: 01193807 FIGURE 5. Typical DTE Application 5 www.national.com DS14185 Typical Performance Characteristics 01193809 01193808 The above input waveforms were used to generate all Typical AC Characteristics. Driver Output Slew Rate between +3V and -3V vs Load Capacitance Conditions: VCC = 5V, RL = 5 k, TA = 25C, fIN = 64 kHz Square Wave Driver Output Voltage vs Frequency and CL Conditions: VCC = 5V, RL = 5 k, TA = 25C 01193816 01193815 Supply Current vs Frequency and Driver CL Supply Current vs Frequency and Driver CL 01193813 www.national.com 01193817 6 DS14185 Typical Performance Characteristics (Continued) Supply Current vs Frequency Driver Output Current vs Output Voltage 01193818 01193819 7 www.national.com DS14185 EIA/TIA-232 3 Driver x 5 Receiver Physical Dimensions inches (millimeters) unless otherwise noted Small Outline Package Order Number DS14185WM NS Package M20B LIFE SUPPORT POLICY NATIONAL'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ``Banned Substances'' as defined in CSP-9-111S2. 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