DS14185 EIA/TIA-232 3 Driver x 5 Receiver General Description Features The DS14185 is a three driver, five receiver device which conforms to the EIA/TIA-232-E standard. n n n n n n n 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. Connection Diagram Replaces one 1488 and two 1489s Conforms to EIA/TIA-232-E 3 drivers and 5 receivers Flow through pinout Failsafe receiver outputs 20-pin SOIC package LapLink ® compatible −200 kbps data rate Functional Diagram SOIC DS011938-1 Order Number DS14185WM See NS Package M20B DS011938-2 LapLink ® is a registered trademark of Travelling Software. © 1999 National Semiconductor Corporation DS011938 www.national.com DS14185 EIA/TIA-232 3 Driver x 5 Receiver April 1999 Absolute Maximum Ratings (Note 1) Storage Temperature Range Lead Temperature Range (Soldering, 4 seconds) ESD Ratings (HBM, 1.5 kΩ, 100 pF) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VCC) +7V +15V Supply Voltage (V+) −15V Supply Voltage (V−) Driver Input Voltage 0V to VCC Driver Output Voltage (Power ± 15V Off) ± 25V Receiver Input Voltage 0V to VCC Receiver Output Voltage (ROUT) Maximum Package Power Dissipation @ +25˚C M Package 1488 mW Derate M Package 11.9 mW/˚C above +25˚C −65˚C to +150˚C +260˚C ≥1.5 kV Recommended Operating Conditions Supply Voltage (VCC) Supply Voltage (V+) Supply Voltage (V−) Operating Free Air Temperature (TA) Min +4.75 +9.0 −13.2 Typ +5.0 +12.0 −12.0 Max +5.25 +13.2 −9.0 Units V V V 0 25 70 ˚C Electrical Characteristics (Note 2) Over recommended supply voltage and operating temperature ranges, unless otherwise specified. Symbol Parameter Conditions Min Typ Max Units DEVICE CHARACTERISTICS ICC VCC Supply Current No Load, All Inputs at +5V I+ V+ Supply Current (Note 2) I− V− Supply Current (Note 2) No Load, All Driver Inputs at 0.8V or +2V All Receiver Inputs at 0.8V or 2.4V. 21.0 30 mA 8.7 15 mA V+ = 9V, V− = −9V V+ = 13.2V, V− = −13.2V V+ = 9V, V− = −9V 13 22 mA −12.5 −22 mA V+ = 13.2V, V− = −13.2V −16.5 −28 mA 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 µA −1.5 mA (Note 2) IIL Low Level Input Current VIN = 0V −1.24 (Note 2) VOH High Level Output Voltage (Note 2) VOL Low Level Output Voltage (Note 2) RL = 3 kΩ, VIN = 0.8V, V+ = 9V, V− = −9V RL = 3 kΩ, VIN = 0.8V, V+ = +12V, V− = −12V RL = 7 kΩ, VIN = 0.8V, V+ = +13.2V, V− = −13.2V RL = 3 kΩ, VIN = 2V, V+ = 9V, V− = −9V 6 7 V 8.5 9 V 10 11.5 V RL = 3 kΩ, VIN = 2V, V+ = +12V, V− = −12V RL = 7 kΩ, VIN = 0.8V, IOS+ Output High Short −7 −6 V −8 −7.5 V −11 −10 V V+ = +13.2V, V− = −13.2V VO = 0V, VIN = 0.8V −6 −13 −18 mA VO = 0V, VIN = 2.0V 6 13 18 mA −2V ≤ VO ≤ +2V, V+ = V− = VCC = 0V 300 Ω −2V ≤ VO ≤ +2V, V+ = V− = VCC = Open Ckt 300 Ω Circuit Current (Note 2) IOS− Output Low Short Circuit Current (Note 2) RO Output Resistance www.national.com 2 Electrical Characteristics (Note 2) (Continued) Over recommended supply voltage and operating temperature ranges, unless otherwise specified. Symbol Parameter Conditions Min Typ Max Units 1.85 2.4 V RECEIVER CHARACTERISTICS VTH Input High Threshold VO ≤ 0.4V, IO = 3.2 mA (Recognized as a High Signal) VTL Input Low Threshold VO ≥ 2.5V, IO = −0.5 mA 0.7 1.0 VIN = ± 3V to ± 15V VIN = +15V VIN = +3V 3.0 4.1 7.0 kΩ 2.1 4.1 5.0 mA mA V (Recognized as a Low Signal) RIN Input Resistance IIN Input Current (Note 2) VOH High Level Output Voltage (Note 7) 0.43 0.7 1 VIN = −15V VIN = −3V IOH = −0.5 mA, VIN = −3V IOH = −10 µA, VIN = −3V −5.0 −4.1 −2.1 mA −0.65 −0.43 mA −4 VOL Low Level Output Voltage IOH = −0.5 mA, VIN = Open Circuit IOH = −10 µA, VIN = Open Circuit IOL = 3.2 mA, VIN = +3V IOSR Short Circuit Current (Note 2) VO = 0V, VIN = 0V −1 2.6 4 V 4.0 4.9 V 2.6 4 V 4.0 4.9 V 0.2 0.4 V −2.7 −1.7 mA Switching Characteristics (Note 2) TA = 25˚C Symbol Parameter Conditions Min Typ Max Units DRIVER CHARACTERISTICS tPHL Propagation Delay High to Low tPLH Propagation Delay Low to High tr, tf Output Slew Rate (Note 8) RL = 3 kΩ, CL = 50 pF (Figures 1, 2) 60 350 ns 240 350 ns 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 kΩ, 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 = +25˚C. 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/µs maximum slew rate, a minimum load capacitance of 390 pF is recommended. 3 www.national.com Parameter Measurement Information DS011938-3 FIGURE 1. Driver Propagation Delay and Transition Time Test Circuit (Note 5) DS011938-4 FIGURE 2. Driver Propagation Delay and Transition Time Waveforms Slew Rate (SR) = 6V/(tr or tf) DS011938-5 FIGURE 3. Receiver Propagation Delay and Transition Time Test Circuit (Note 6) DS011938-6 FIGURE 4. Receiver Propagation Delay and Transition Time Waveform Pin Descriptions Pin # 13, 15, 16 5, 6, 8 2, 3, 4, 7, 9 www.national.com 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) 4 Pin Descriptions (Continued) Pin # Name Description 10 V− Negative Power Supply Pin (−9.0 ≤ V− ≤ −13.2) 20 VCC Positive Power Supply Pin (+5V ± 5%) Applications Information LapLink COMPATIBILITY In a typical Data Terminal Equipment (DTE) to Data Circuit-Terminating 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. The DS14185 can easily provide 128 kbps data rate under maximum driver load conditions of CL = 2500 pF and RL = 3 kΩ, while power supplies are: VCC = 4.75V, V+ = 10.8V, V− = −10.8V 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 DS011938-7 FIGURE 5. Typical DTE Application 5 www.national.com Typical Performance Characteristics DS011938-8 DS011938-9 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 kΩ, TA = 25˚C, fIN = 64 kHz Square Wave Driver Output Voltage vs Frequency and CL Conditions: VCC = 5V, RL = 5 kΩ, TA = 25˚C DS011938-16 DS011938-15 Supply Current vs Frequency and Driver CL Supply Current vs Frequency and Driver CL DS011938-13 www.national.com DS011938-17 6 Typical Performance Characteristics (Continued) Supply Current vs Frequency Driver Output Current vs Output Voltage DS011938-18 DS011938-19 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 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. National Semiconductor Corporation Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: [email protected] www.national.com National Semiconductor Europe Fax: +49 (0) 1 80-530 85 86 Email: [email protected] Deutsch Tel: +49 (0) 1 80-530 85 85 English Tel: +49 (0) 1 80-532 78 32 Français Tel: +49 (0) 1 80-532 93 58 Italiano Tel: +49 (0) 1 80-534 16 80 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. National Semiconductor Asia Pacific Customer Response Group Tel: 65-2544466 Fax: 65-2504466 Email: [email protected] National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507 National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.