DS26C31MQML DS26C31MQML CMOS Quad TRI-STATE Differential Line Driver Literature Number: SNOSAS2 DS26C31MQML CMOS Quad TRI-STATE® Differential Line Driver General Description The DS26C31 is a quad differential line driver designed for digital data transmission over balanced lines. The DS26C31 meets all the requirements of EIA standard RS-422 while retaining the low power characteristics of CMOS. The DS26C31 is compatible with EIA standard RS-422; however, one exception in test methodology is taken . This enables the construction of serial and terminal interfaces while maintaining minimal power consumption. The DS26C31 accepts TTL or CMOS input levels and translates these to RS-422 output levels. This part uses special output circuitry that enables the drivers to power down without loading down the bus. This device has enable and disable circuitry common to all four drivers. The DS26C31 is pin compatible to the AM26LS31 and the DS26LS31. All inputs are protected against damage due to electrostatic discharge by diodes to VCC and ground. Features ■ ■ ■ ■ ■ ■ TTL input compatible Outputs will not load line when VCC = 0V Meets the requirements of EIA standard RS-422 Operation from single 5V supply TRI-STATE outputs for connection to system buses Low quiescent current Ordering Information NS Part Number SMD Part Number DS26C31ME/883 5962–9163901M2A DS26C31MJ/883 DS26C31MW/883 NS Package Number Package Description E20A 20LD LCC 5962–9163901MEA J16A 16LD Ceramic DIP 5962–9163901MFA W16A 16LD Ceramic Flatpack Connection Diagrams 20163001 Top View See NS Package Number J16A, W16A 20163012 Top View 20-Lead Ceramic Leadless Chip Carrier (E) See NS Package Number E20A TRI-STATE® is a registered trademark of National Semiconductor Corporation. © 2010 National Semiconductor Corporation 201630 www.national.com DS26C31MQML CMOS Quad TRI-STATE Differential Line Driver October 26, 2010 DS26C31MQML Logic Diagram 20163002 Truth Table ENABLE ENABLE Input Non-Inverting Output L H X Z Z All other L L H combinations of H H L enable inputs L = Low logic state X = Irrelevant H = High logic state Z = TRI-STATE (high impedance) www.national.com Inverting Output 2 DS26C31MQML Absolute Maximum Ratings (Note 1, Note 2) Supply Voltage (VCC) DC Input Voltage (VI) DC Output Voltage (VO) Clamp Diode Current (IIK, IOK) DC Output Current, per pin (IO) DC VCC or Gnd Current, per pin (ICC) Storage Temperature Range (TStg) Lead Temperature (TL) −0.5V to 7.0V −1.5V to VCC +0.5V −0.5V to 7V ±20 mA ±150 mA ±150 mA −65°C ≤ TA ≤ +150°C 260°C Soldering, 4 sec. Operating Conditions Min 4.50 0 −55 Supply Voltage (VCC) DC Input or Output Voltage (VI, VO) Operating Temperature Range (TA) Max 5.50 VCC +125 Units V V °C Quality Conformance Inspection Mil-Std-883, Method 5005 - Group A Subgroup Description Temp °C 1 Static tests at +25 2 Static tests at +125 3 Static tests at -55 4 Dynamic tests at +25 5 Dynamic tests at +125 6 Dynamic tests at -55 7 Functional tests at +25 8A Functional tests at +125 8B Functional tests at -55 9 Switching tests at +25 10 Switching tests at +125 11 Switching tests at -55 12 Settling time at +25 13 Settling time at +125 14 Settling time at -55 3 www.national.com DS26C31MQML DS26C31M Electrical Characteristics DC Parameters Symbol Parameter Conditions Notes Min Max 2.0 Units Subgroups V 1, 2, 3 V 1, 2, 3 V 1, 2, 3 V 1, 2, 3 V 1, 2, 3 VIH Logical "1" Input Voltage VIL Logical "0" Input Voltage VOH Logical "1" Output Voltage VI = VIH or VIL, VCC = 4.5V, IO = -20mA VOL Logical "0" Output Voltage VI = VIH or VIL, IO = 20mA, VCC = 4.5V VT Differential Output Voltage RL = 100Ω, VCC = 4.5V (Note 4) |VT| − |VT | Difference in Differential Output RL = 100Ω, VCC = 4.5V (Note 4) 0.4 V 1, 2, 3 VOS Common Mode Output Voltage RL = 100Ω, VCC = 5.5V (Note 4) 3.0 V 1, 2, 3 |VOS−VOS | Diff in Common Mode Output RL = 100Ω, VCC = 5.5V (Note 4) 0.4 V 1, 2, 3 II Input Current VI = VCC, Gnd, VIH, or VIL, VCC = 5.5V ±1.0 µA 1, 2, 3 ICC Quiescent Power Supply Current IO = 0µA, VI = VCC or Gnd, VCC = 5.5V (Note 5) 500 µA 1, 2, 3 (Note 5) 2.1 mA 1, 2, 3 ±5.0 µA 1, 2, 3 -150 mA 1, 2, 3 100 µA 1, 2, 3 -100 µA 1, 2, 3 Max Units Subgroups Figure 2 14 ns 9, 10, 11 Figure 2 14 ns 9, 10, 11 0.8 IO = 0µA, VI = 2.4V or 0.5V, VCC = 5.5V IOZ TRI-STATEOutput Leakage Current VO = VCC or Gnd, Enable = VIL, VCC = 5.5V, Enable = VIH ISC Output Short Circuit Current VI = VCC or Gnd, VCC = 5.5V IOff Output Leakage Current "Power VCC = 0V, VO = 6V Off" VCC = 0V, VO = 0V 2.5 0.5 (Note 4), (Note 6) 2.0 -30 AC Parameters - Propagation Delay Time Figure 1 The following conditions apply, unless otherwise specified. Symbol Parameter tPLH Input to Output Prop Delay tPHL Input to Output Prop Dalay VCC = 5V, tR ≤ 6ns, tF ≤ 6ns Conditions Skew Notes Min 3.0 ns 9, 10, 11 tTLH Output Rise Time Figure 4 (Note 7) 14 ns 9, 10, 11 tTHL Output Fall Time Figure 4 14 ns 9, 10, 11 tPZH Output Enable Time Figure 3 22 ns 9, 10, 11 tPZL Output Enable Time Figure 3 28 ns 9, 10, 11 tPHZ Output Disable Time Figure 3 (Note 8) 12 ns 9, 10, 11 tPLZ Output Disable Time Figure 3 (Note 8) 14 ns 9, 10, 11 Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions. Note 2: Unless otherwise specified, all voltages are referenced to ground. All currents into device pins are positive, all currents out of device pins are negative. Note 3: Unless otherwise specified, min/max limits apply across the recommended operating temperature range. Note 4: See EIA Specification RS-422 for exact test conditions. Note 5: Measured per input. All other inputs at VCC or GND. Note 6: This is the current sourced when a high output is shorted to ground. Only one output at a time should be shorted. Note 7: Skew is defined as the difference in propagation delays between complimentary outputs at the 50% point. Note 8: Output disable time is the delay from ENABLE or ENABLE being switched to the output transistors turning off. www.national.com 4 DS26C31MQML Typical Performance Characteristics Differential Propagation Delay vs Temperature Differential Propagation Delay vs Power Supply Voltage 20163014 20163015 Differential Skew vs Temperature Differential Skew vs Power Supply Voltage 20163016 20163017 Differential Transition Time vs Temperature Differential Transition Time vs Power Supply Voltage 20163018 20163019 5 www.national.com DS26C31MQML Complementary Skew vs Temperature Complementary Skew vs Power Supply Voltage 20163020 20163021 Differential Output Voltage vs Output Current Differential Output Voltage vs Output Current 20163022 20163023 Output High Voltage vs Output High Current Output High Voltage vs Output High Current 20163024 20163025 Output Low Voltage vs Output Low Current Output Low Voltage vs Output Low Current 20163026 www.national.com 20163027 6 DS26C31MQML Supply Current vs Temperature Output Low Voltage vs Output Low Current 20163026 20163028 Output Low Voltage vs Output Low Current Supply Current vs Temperature 20163027 20163028 Supply Current vs Power Supply Voltage No Load Supply Current vs Data Rate 20163030 20163029 Loaded Supply Current vs Data Rate Output Short Circuit Current vs Temperature 20163031 20163032 7 www.national.com DS26C31MQML Output Short Circuit Current vs Power Supply Voltage 20163033 AC Test Circuit and Switching Time Waveforms 20163003 Note: C1 = C2 = C3 = 40 pF (Including Probe and Jig Capacitance), R1 = R2 = 50Ω, R3 = 500Ω. FIGURE 1. AC Test Circuit 20163004 FIGURE 2. Propagation Delays www.national.com 8 DS26C31MQML 20163005 FIGURE 3. Enable and Disable Times 20163007 Input pulse; f = 1 MHz, 50%; tr ≤ 6 ns, tf ≤ 6 ns FIGURE 4. Differential Rise and Fall Times Typical Applications Two-Wire Balanced System, RS-422 20163009 *RT is optional although highly recommended to reduce reflection. 9 www.national.com DS26C31MQML Revision History Released 10/26/2010 www.national.com Revision A Section Changes New Release, Corporate format 10 1 MDS data sheets converted into one Corp. data sheet format. MNDS26C31M-X Rev 0B0 will be archived. DS26C31MQML Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead Ceramic Leadless Chip Carrier (E) NS Package Number E20A 16-Lead Ceramic Dual-In-Line Package (J) NS Package Number J16A 11 www.national.com DS26C31MQML 16-Lead Ceramic Flatpak Package (W) NS Package Number W16A www.national.com 12 DS26C31MQML Notes 13 www.national.com DS26C31MQML CMOS Quad TRI-STATE Differential Line Driver Notes For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com Products Design Support Amplifiers www.national.com/amplifiers WEBENCH® Tools www.national.com/webench Audio www.national.com/audio App Notes www.national.com/appnotes Clock and Timing www.national.com/timing Reference Designs www.national.com/refdesigns Data Converters www.national.com/adc Samples www.national.com/samples Interface www.national.com/interface Eval Boards www.national.com/evalboards LVDS www.national.com/lvds Packaging www.national.com/packaging Power Management www.national.com/power Green Compliance www.national.com/quality/green Switching Regulators www.national.com/switchers Distributors www.national.com/contacts LDOs www.national.com/ldo Quality and Reliability www.national.com/quality LED Lighting www.national.com/led Feedback/Support www.national.com/feedback Voltage References www.national.com/vref Design Made Easy www.national.com/easy www.national.com/powerwise Applications & Markets www.national.com/solutions Mil/Aero www.national.com/milaero PowerWise® Solutions Serial Digital Interface (SDI) www.national.com/sdi Temperature Sensors www.national.com/tempsensors SolarMagic™ www.national.com/solarmagic PLL/VCO www.national.com/wireless www.national.com/training PowerWise® Design University THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION (“NATIONAL”) PRODUCTS. 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