DS14C232 Low Power +5V Powered TIA/EIA-232 Dual Driver/Receiver General Description Features The DS14C232 is a low power dual driver/receiver featuring an onboard DC to DC converter, eliminating the need for ± 12V power supplies. The device only requires a +5V power supply. ICC is specified at 3.0 mA maximum, making the device ideal for battery and power conscious applications. The drivers’ slew rate is set internally and the receivers feature internal noise filtering, eliminating the need for external slew rate and filter capacitors. The device is designed to interface data terminal equipment (DTE) with data circuit-terminating equipment (DCE). The driver inputs and receiver outputs are TTL and CMOS compatible. DS14C232C driver outputs and receiver inputs meet TIA/EIA-232-E (RS-232) and CCITT V.28 standards. n Pin compatible with industry standard MAX232, LT1081, ICL232 and TSC232 n Single +5V power supply n Low power — ICC 3.0 mA maximum n DS14C232C meets TIA/EIA-232-E (RS-232) and CCITT V.28 standards n CMOS technology n Receiver Noise Filter n Package efficiency — 2 drivers and 2 receivers n Available in Plastic DIP, Narrow and Wide SOIC packages n TIA/EIA-232 compatible extended temperature range option: DS14C232T −40˚C to +85˚C DS14C232E/J: −55˚C to +125˚C Connection Diagram Functional Diagram DS010744-1 Order Number DS14C232CN, DS14C232CM, or DS14C232TM See NS Package Number N16E, or M16A DS010744-2 © 1999 National Semiconductor Corporation DS010744 www.national.com DS14C232 Low Power +5V Powered TIA/EIA-232 Dual Driver/Receiver October 1999 DS14C232 Absolute Maximum Ratings (Note 1) Storage Temp. Range Lead Temp. (Soldering, 4 sec.) ESD Rating (HBM, 1.5 kΩ, 100 pF) Specifications for the 883 version of this product are listed separately on the following pages. to 6V +14V −14V 0.3V) (V− − 0.3V) ± 25V Receiver Input Voltage Receiver Output Voltage −0.3V to (VCC + 0.3V) Junction Temperature +150˚C Maximum Package Power Dissipation @ 25˚C (Note 6) N Package 1698 mW M Package 1156 mW Short Circuit Duration, Continuous DOUT Supply Voltage, VCC V+ Pin V− Pin Driver Input Voltage Driver Output Voltage −0.3V (VCC − 0.3)V to +0.3V to −0.3V to (VCC + (V+ + 0.3V) to −65˚C to +150˚C +260˚C ≥ 2.5 kV Recommended Operating Conditions Supply Voltage, VCC Operating Free Air Temp. (TA) DS14C232C DS14C232T Min 4.5 Max 5.5 Units V 0 −40 +70 +85 ˚C ˚C Electrical Characteristics (Note 2) Over recommended operating conditions, unless otherwise specified Symbol Parameter Conditions Min Typ Max Units DC TO DC CONVERTER CHARACTERISTICS V+ Positive Power Supply V− Negative Power Supply RL = 3 kΩ, C1–C4 = 1.0 µF, DIN = 0.8V RL = 3 kΩ, C1–C4 = 1.0 µF, DIN = 2.0V ICC Supply (VCC) Current No Load 9.0 V −8.5 1.0 V 3.0 mA VCC V DRIVER CHARACTERISTICS VIH High Level Input Voltage VIL Low Level Input Voltage IIH High Level Input Current IIL Low Level Input Current VOH High Level Output Voltage VOL Low Level Output Voltage IOS+ Output High Short Circuit Current IOS− Output Low Short Circuit Current RO Output Resistance 2 GND 0.8 V VIN ≥ 2.0V −10 +10 µA VIN ≤ 0.8V RL = 3 kΩ −10 +10 µA 5.0 RL = 3 kΩ VO = 0V, VIN = 0.8V 8.0 V −7.0 −5.0 V −30 −15 −5.0 mA VO = 0V, VIN = 2V 5.0 11 30 mA −2V ≤ VO ≤ +2V, VCC = 0V = GND 300 (Note 3) Ω RECEIVER CHARACTERISTICS VTH Input High Threshold Voltage VTL Input Low Threshold Voltage VHY Hysteresis RIN Input Resistance IIN Input Current VCC = 5.0V VCC = 5.0V ± 10% VOH VOL High Level Output Voltage Low Level Output Voltage www.national.com 0.8 −15V ≤ VIN ≤ +15V VIN = +15V VIN = +3V VIN = −3V VIN = −15V VIN = −3V, IO = −3.2 mA VIN = −3V, IO = −20 µA VIN = +3V, IO = +3.2 mA 2 1.9 2.4 V 1.9 2.6 V 1.5 V 0.2 0.4 1.0 V 3.0 4.7 7.0 kΩ +2.14 +3.75 +5.0 mA +0.43 +0.64 +1.0 mA −1.0 −0.64 −0.43 mA −5.0 −3.75 −2.14 mA 3.5 4.5 4.0 4.9 0.15 V V 0.4 V Over recommended operating conditions, unless otherwise specified. Symbol Parameter Conditions Min Typ Max Units 1.0 4.0 µs 1.0 4.0 µs 0.1 1.0 µs 30 V/µs DRIVER CHARACTERISTICS tPLH Propagation Delay Low to High tPHL Propagation Delay High to Low tSK Skew |tPLH − tPHL| SR1 Output Slew Rate SR2 Output Slew Rate RL = 3 kΩ CL = 50 pF Figure 1 and Figure 2 RL = 3 kΩ to 7 kΩ, CL = 50 pF RL = 3 kΩ, CL = 2500 pF (Note 7) 4.0 4.5 V/µs RECEIVER CHARACTERISTICS tPLH Propagation Delay Low to High Input Pulse Width > 10 µs 2.9 6.5 µs tPHL Propagation Delay High to Low CL = 50 pF 2.5 6.5 µs tSK Skew |tPLH − tPHL| (Figures 3, 4) 0.4 2.0 µs tnw Noise Pulse Width Rejected (Figures 3, 4) 0.7 0.5 µs 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+ and IOS− 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 = tf = 200 ns, VIH = 3V, VIL = −3V, f = 30 kHz. Note 5: All typicals are given for VCC = 5.0V. Note 6: Ratings apply to ambient temperature at +25˚C. Above this temperature derate: N Package 15.6 mW/˚C, and M Package 10.6 mW/˚C. Note 7: Slew rate is defined as ∆V/∆t, measured between ± 3V level. 3 www.national.com DS14C232 Switching Characteristics DS14C232 Absolute Maximum Ratings (Note 1) Continuous −65˚C to +150˚C +260˚C Short Circuit Duration, DOUT Storage Temp. Range Lead Temp. (Soldering, 4 sec.) ESD Rating (HMB, 1.5 kΩ, 100 pF) For complete Military Product Specifications, refer to the appropriate SMD or MDS. −0.3V to 6V Supply Voltage, VCC (VCC − 0.3)V to +14V V+ Pin +0.3V to −14V V− Pin Driver Input Voltage −0.3V to (VCC + 0.3V) Driver Output Voltage (V+ + 0.3V) to (V− − 0.3V) ± 25V Receiver Input Voltage Receiver Output Voltage −0.3V to (VCC + 0.3V) Maximum Package Power Dissipation @ 25˚C (Note 8) J Package 1520 mW E Package 2000 mW ≥ 2.5 kV Recommended Operating Conditions Supply Voltage, VCC Operating Free Air Temp. (TA) DS14C232E/J Min 4.5 Max 5.5 Units V −55 +125 ˚C Min Max Units 8.0 mA Electrical Characteristics (Note 2) Over recommended operating conditions, unless otherwise specified Symbol Parameter DEVICE CHARACTERISTICS (C1–C4 = 1.0 µF) ICC Supply (VCC) Current Conditions No Load DRIVER CHARACTERISTICS VIH High Level Input Voltage VIL Low Level Input Voltage IIH High Level Input Current IIL Low Level Input Current VOH High Level Output Voltage VOL Low Level Output Voltage IOS+ Output High Short Circuit Current IOS− Output Low Short Circuit Current RO Output Resistance 2 VIN ≥ 2.0V VIN = 0V RL = 3 kΩ RL = 3 kΩ VO = 0V V 0.8 V 100 µA 100 µA 5.0 V −5.0 (Note 3) VO = 0V −2V ≤ VO ≤ +2V, TA = 25˚C, VCC = 0V = GND −25 V mA 25 mA Ω 300 RECEIVER CHARACTERISTICS (C1–C4 = 1.0 µF) VTH Input High Threshold Voltage VTL Input Low Threshold Voltage VHY Hysteresis 3.0 0.2 RIN Input Resistance VOH High Level Output Voltage TA = 25˚C, +125˚C TA = −55˚C VIN = ± 3V and ± 15V, TA = 25˚C IO = −3.2 mA Low Level Output Voltage IO = −20 µA IO = +3.2 mA VOL V V 0.1 1.0 0.05 1.0 V 3.0 7.0 kΩ 3.5 V V 4.0 V 0.4 V Switching Characteristics Over recommended operating conditions, unless otherwise specified. Symbol Parameter DRIVER CHARACTERISTICS (C1–C4 = 1.0 µF) Conditions RL = 3 kΩ, CL = 50 pF Min Figures 1, 2 Max Units 4.0 µs tPLH Propagation Delay Low to High tPHL Propagation Delay High to Low 4.0 µs tSK Skew |tPLH − tPHL| 1.0 µs 30 V/µs µs SR1 Output Slew Rate RL = 3 kΩ to 7 kΩ, CL = 2500 pF RECEIVER CHARACTERISTICS (C1–C4 = 1.0 µF) (Note 7) 1.5 tPLH Propagation Delay Low to High Propagation Delay High to Low Input Pulse Width > 10 µs CL = 50 pF 8.0 tPHL 8.0 µs tSK Skew |tPLH − tPHL| (Figures 3, 4) 2.0 µs www.national.com 4 DS14C232 Switching Characteristics (Continued) Note 8: Ratings apply to ambient temperature at +25˚C. Above this temperature derate: J Package 12.2 mW/˚C and E Package 13.3 mW/˚C. Connection Diagrams J Package 16-Lead Dual-In-line Package E Package 20-Lead Ceramic Leadless Chip Carrier DS010744-10 DS010744-1 For Complete Military Product Specifications See MDS or SMD. Order Number DS14C232J/883 or DS14C232E/883 See NS Package Number E20A or J16A Parameter Measurement Information DS010744-3 FIGURE 1. Driver Load Circuit DS010744-4 FIGURE 2. Driver Switching Waveform 5 www.national.com DS14C232 Parameter Measurement Information (Continued) DS010744-5 FIGURE 3. Receiver Load Circuit DS010744-6 FIGURE 4. Receiver Propagation Delays and Noise Rejection (Note 4) Pin Descriptions DIN1, DIN2 (Pins 11, 10) Driver input pins are TTL/CMOS compatible. Inputs of unused drivers may be left open, an internal active pull-up resistor (500 kΩ minimum, typically 5 MΩ) pulls input HIGH. Output will be LOW for open inputs. DOUT1, DOUT2 (Pins 14, 7) VCC (Pin 16) Power supply pin for the device, +5V ( ± 10%). V+ (Pin 2) Positive supply for TIA/EIA-232-E drivers. Recommended external capacitor: C4-1.0 µF (6.3V). Capacitor value should be larger than 1 µF. This supply is not intended to be loaded externally. V− (Pin 6) Negative supply for TIA/EIA-232-E drivers. Recommended external capacitor: C3-1.0 µF (16V). Capacitor value should be larger than 1 µF. This supply is not intended to be loaded externally. C1+, C1− (Pins 1, 3) External capacitor connection pins. Recommended capacitor: 1.0 µF (6.3V). Capacitor value should be larger than 1 µF. C2+, C2− (Pins 4, 5) External capacitor connection pins. Recommended capacitor: 1.0 µF (16V). Capacitor value should be greater than 1 µF. www.national.com Driver output pins conform to TIA/EIA-232-E levels. RIN1, RIN2 (Pins 13, 8) Receiver input pins accept TIA/EIA-232-E input voltages ( ± 25V). Receivers feature a noise filter and guaranteed hysteresis of 100 mV. Unused receiver input pins may be left open. Internal input resistor 4.7 kΩ pulls input low, providing a failsafe high output. ROUT1, ROUT2 (Pins 12, 9) Receiver output pins are TTL/CMOS compatible. Receiver output HIGH voltage is specified for both CMOS and TTL load conditions. GND (Pin 15) Ground Pin. 6 DS14C232 Typical Application Information Application of DS14C232 and INS8250 DS010744-7 Typical Connection Diagram DS010744-9 7 www.national.com DS14C232 Typical Performance Characteristics DRIVER VOH & VOL vs POWER SUPPLY VOLTAGE DS010744-11 DS010744-12 VCC = 5.0V, RL = 3 kΩ, CL = 15 pF (includes jig and probe capacitance), CP = 1 µF DS010744-13 www.national.com S1 VO 2.0V VOL 0.8V VOH 8 DS14C232 Typical Performance Characteristics (Continued) DRIVER SLEW RATE vs POWER SUPPLY VOLTAGE & LOAD CAPACITANCE DS010744-14 DS010744-15 Ta = 25˚C, RL = 5 kΩ, CP = 1 µF, ƒ = 30 KHz DS010744-16 SR = 6V/t1 or 6V/t2, whichever is greater. 9 www.national.com DS14C232 Physical Dimensions inches (millimeters) unless otherwise noted Order Number DS14C232E/883 NS Package Number E20A Order Number DS14C232J/883 NS Package Number J16A www.national.com 10 DS14C232 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Order Number DS14C232CM or DS14C232TM NS Package Number M16A Order Number DS14C232CN NS Package Number N16E 11 www.national.com DS14C232 Low Power +5V Powered TIA/EIA-232 Dual Driver/Receiver Notes 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. 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.