DS14C239 Dual Supply TIA/EIA-232 3 x 5 Driver/Receiver General Description Features The DS14C239 is a three driver, five receiver device which conforms to the TIA/EIA-232-E standard and CCITT V.28 recommendations. This device eliminates b12V supply by employing an internal DC-DC converter to generate the necessary output levels from a single a 5V supply and a positive voltage power supply ( a 7.5V to a 13.2V). Driver slew rate control and receiver noise filtering have also been internalized to eliminate the need for external slew rate control and noise filtering capacitors. With the addition of TRI-STATEÉ receiver outputs, device power consumption is kept to a minimum. The combination of its low power requirement and extended operating temperature range makes this device an ideal choice for a wide variety of commercial, industrial, and battery powered applications. Y Connection Diagram Functional Diagram Y Y Y Y Y Y Y Y Conforms to TIA/EIA-232-E and CCITT V.28 Internal DC-DC converter Low power requirement: I a e 10 mA max ICC e 1 mA max Internal driver slew rate control Receiver Noise Filtering Operates above 120 kbits/sec TRI-STATE Receiver Outputs Direct replacement for MAX239 Industrial temperature range optionÐDS14C239T (b40§ C to a 85§ C) TL/F/11283 – 1 Order Number DS14C239N, DS14C239WM, DS14C239TN or DS14C239TWM See NS Package Number M24B or NA24G TRI-STATEÉ is a registered trademark of National Semiconductor Corporation. C1996 National Semiconductor Corporation TL/F/11283 TL/F/11283 – 2 RRD-B30M66/Printed in U. S. A. DS14C239 Dual Supply TIA/EIA-232 3 x 5 Driver/Receiver March 1996 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. b 65§ C to a 150§ C Lead Temperature (Soldering, 4 sec.) a 260§ C Short Circuit Duration (DOUT) ESD Rating (HBM, 1.5 kX, 100 pF) b 0.3V to a 6V Supply Voltage (VCC) V a Pin (VCC b 0.3V) to a 15V a 0.3V to b 15V Vb Pin b 0.3V to (VCC a 0.3V) Driver Input Voltage Driver Output Voltage (V a a 0.3V) to (Vb b 0.3V) g 30V Receiver Input Voltage b 0.3V to (VCC a 0.3V) Receiver Output Voltage a 150§ C Junction Temperature Maximum Package Power Dissipation @ a 25§ C (Note 6) N Package 2400 mW WM Package 1400 mW continuous t 2.0 kV Recommended Operating Conditions Supply Voltage (VCC) Supply Pin (V a ) Operating Free Air Temp. (TA) DS14C239 DS14C239T Min 4.5 7.5 Max 5.5 13.2 Units V V 0 a 70 a 85 §C §C b 40 Electrical Characteristics Over recommended operating conditions, unless otherwise specified (Note 2) Symbol Parameter Conditions Min Typ Max Units DEVICE CHARACTERISTICS Vb Negative Power Supply RL e 3 kX, C1, C2 e 1.0 mF, DIN e 2.0V b 9.5 V Ia Supply Current (V a ) No Load 4 10 mA ICC Supply Current (VCC) No Load 0.1 1.0 mA V DRIVER CHARACTERISTICS VIH High Level Input Voltage 2.0 VCC VIL Low Level Input Voltage GND 0.8 V IIH High Level Input Current VIN t 2.0V b 10 a 10 mA IIL Low Level Input Current VIN s 0.8V b 10 a 10 mA VOH High Level Output Voltage RL e 3 kX 5.0 8.7 V b 8.0 b 5.0 VOL Low Level Output Voltage IOS a Output High Short Circuit Current VO e 0V, VIN e 0.8V b 40 b 20 b 5.0 mA V IOSb Output Low Short Circuit Current VO e 0V, VIN e 2.0V 5.0 16 40 mA RO Output Resistance b 2V s VO s a 2V, VCC e V a e GND e 0V 300 X RECEIVER CHARACTERISTICS VTH Input High Threshold Voltage VTL Input Low Threshold Voltage VHY Hysteresis http://www.national.com TA e 25§ C 2 2.4 V TA e b40§ C to a 85§ C 2 2.6 V 0.8 1.5 TA e 25§ C 0.2 0.5 1.0 V TA e b40§ C to a 85§ C 0.1 0.5 1.0 V 2 V Electrical Characteristics (Continued) Over recommended operating conditions, unless otherwise specified (Note 2) Symbol Parameter Conditions Min Typ Max Units RECEIVER CHARACTERISTICS (Continued) RIN Input Resistance IIN Input Current VOH High Level Output Voltage VOL Low Level Output Voltage VIH High Level Input Voltage VIL Low Level Input Voltage IIH High Level Input Current IIL IOZ VIN e a 15V 3.0 4.5 7.0 kX 2.14 3.8 5.0 mA VIN e a 3V 0.43 0.6 1.0 mA VIN e b3V b 1.0 b 0.6 b 0.43 mA VIN e b15V b 2.14 mA b 5.0 b 3.8 VIN e b3V, IO e b3.2 mA 3.5 4.5 V VIN e b3V, IO e b20 mA 4.0 4.9 V VIN e a 3V, IO e a 3.2 mA 0.4 V 2.4 VCC V GND 0.8 V VIN t 2.4V b 10 a 10 mA Low Level Input Current VIN s 0.8V b 10 a 10 mA Output Leakage Current EN e VCC, 0V s ROUT s VCC b 10 a 10 mA EN 0.25 0.1 Switching Characteristics Over recommended operating conditions, unless otherwise specified (Note 4) Symbol Parameter Conditions Min Typ Max Units 0.7 4.0 ms 0.7 4.0 ms 0 1.0 ms 30 V/ms DRIVER CHARACTERISTICS tPLH Propagation Delay LOW to HIGH RL e 3 kX CL e 50 pF (Figures 1 and 2) tPHL Propagation Delay HIGH to LOW tsk Skew ltPLH – tPHL l SR1 Output Slew Rate RL e 3kX to 7 kX, CL e 50 pF, V a s 10.35V 4.0 17 SR2 Output Slew Rate RL e 3 kX, CL e 2500 pF, V a s 10.35V 3.0 6.4 V/ms RECEIVER CHARACTERISTICS tPLH Propagation Delay LOW to HIGH tPHL Propagation Delay HIGH to LOW tsk Skew l tPLH – tPHL l Input Pulse Width l 10 ms CL e 50 pF (Figures 3 and 4) (Figures 5 and 7) tPLZ tPZL (Figures 5 and 6) tPHZ tPZH tnw Noise Pulse Width Rejected (Figures 3 and 4) 2.1 6.5 2.9 6.5 ms 0.8 2.0 ms 0.25 2.0 ms 0.70 2.0 ms 0.25 2.0 ms 0.70 2.0 ms 2.0 1.0 ms ms 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 tables of ‘‘Electrical Characteristics’’ specify conditions for 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. Note 3: IOS a and IOSb values are for one output at a time. If more than one output is shorted simultaneously, the device power dissipation may be exceeded. Note 4: Receiver AC input waveform for test purposes: tr e tf e 200 ns, VIH e 3V, VIL e b 3V, f e 64 kHz (128 kbits/sec). Driver AC input waveform for test purposes: tr e tf s 10 ns, VIH e 3V, VIL e 0V, f e 64 kHz (128 kbits/sec). Note 5: All typicals are given for VCC e 5.0V and TA e a 25§ C, V a e 10.35V. Note 6: Ratings apply to ambient temperature at a 25§ C. Above this temperature derate: N package 20 mW/§ C and WM package 13.5 mW/§ C. 3 http://www.national.com Parameter Measurement Information TL/F/11283 – 4 FIGURE 1. Driver Load Circuit TL/F/11283 – 5 FIGURE 2. Driver Switching Waveform TL/F/11283 – 6 FIGURE 3. Receiver Load Circuit TL/F/11283 – 7 FIGURE 4. Receiver Propagation Delays and Noise Rejection http://www.national.com 4 Parameter Measurement Information (Continued) TL/F/11283 – 8 FIGURE 5. Receiver Disable Load Circuit TL/F/11283 – 9 FIGURE 6. Receiver TRI-STATE Timing (tPHZ, tPZH) TL/F/11283 – 10 FIGURE 7. Receiver TRI-STATE Timing (tPLZ, tPZL) Pin Descriptions VCC (pin 4)ÐPower supply pin for the device, a 5V ( g 10%). DIN 1 – 3 (pins 24, 23, 16)ÐDriver input pins are TTL/CMOS compatible. Inputs of unused drivers may be left open, an internal pull-up resistor (500 kX minimum, typically 5 MX) pulls input to VCC. Output will be LOW for open inputs. DOUT 1 – 3 (pins 19, 20, 13)ÐDriver output pins conform to TIA/EIA-232-E levels. RIN 1 – 5 (pins 2, 21, 18, 12, 9)ÐReceiver input pins accept TIA/EIA-232-E input voltages ( g 15V). Receivers feature a noise filter and guaranteed hysteresis of 100 mV. Unused receiver input pins may be left open. Internal input resistor (5 kX) pulls input LOW, providing a failsafe HIGH output. ROUT 1 – 5 (pins 1, 22, 17, 11, 10)ÐReceiver output pins are TTL/CMOS compatible. Receiver output HIGH voltage is specified for both CMOS and TTL load conditions. GND (pin 3)ÐGround pin. V a (pin 5)ÐPositive supply for TIA/EIA-232-E drivers. Specified at 7.5V minimum and 13.2V maximum. Vb (pin 8)ÐNegative supply for TIA/EIA-232-E drivers. Recommended external capacitor: C2 e 1.0 mF (16V). This supply is not intended to be loaded externally. C1 a , C1b (pins 6, 7)ÐExternal capacitor connection pins. Recommended capacitorÐ1.0 mF (16V). EN (pin 14)ÐControls the Receiver output TRI-STATE Circuit. A High level on this pin will disable the Receiver Output. 5 http://www.national.com http://www.national.com 6 Physical Dimensions inches (millimeters) unless otherwise noted Order Number DS14C239WM or DS14C239TWM NS Package Number M24B 7 http://www.national.com DS14C239 Dual Supply TIA/EIA-232 3 x 5 Driver/Receiver Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Order Number DS14C239N or DS14C239TN See NS Package Number NA24G 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. 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