DS26C32AT/DS26C32AM Quad Differential Line Receiver General Description Features The DS26C32A is a quad differential line receiver designed to meet the RS-422, RS-423, and Federal Standards 1020 and 1030 for balanced and unbalanced digital data transmission, while retaining the low power characteristics of CMOS. The DS26C32A has an input sensitivity of 200 mV over the common mode input voltage range of ± 7V. The DS26C32A features internal pull-up and pull-down resistors which prevent output oscillation on unused channels. The DS26C32A provides an enable and disable function common to all four receivers, and features TRI-STATE ® outputs with 6 mA source and sink capability. This product is pin compatible with the DS26LS32A and the AM26LS32. n CMOS design for low power n ± 0.2V sensitivity over input common mode voltage range n Typical propagation delays: 19 ns n Typical input hysteresis: 60 mV n Inputs won’t load line when VCC = 0V n Meets the requirements of EIA standard RS-422 n TRI-STATE outputs for connection to system buses n Available in Surface Mount n Mil-Std-883C compliant Logic Diagram DS008764-1 Connection Diagrams Dual-In-Line Package 20-Lead Ceramic Leadless Chip Carrier DS008764-2 Top View Order Number DS26C32ATM or DS26C32ATN See NS Package M16A or N16E For Complete Military Product Specifications, refer to the appropriate SMD or MDS. Order Number DS26C32AME/883, DS26C32AMJ/883 or DS26C32AMW/883 See NS Package E20A, J16A or W16A DS008764-12 TRI-STATE ® is a registered trademark of National Semiconductor Corporation. © 1998 National Semiconductor Corporation DS008764 www.national.com DS26C32AT/DS26C32AM Quad Differential Line Receiver June 1998 Absolute Maximum Ratings (Notes 2, 1) Ceramic “E” Pkg. 2108 mW Ceramic “W” Pkg. 1215 mW ± 25 mA Maximum Current Per Output This device does not meet 2000V ESD rating. (Note 4) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VCC) Common Mode Range (VCM) Differential Input Voltage (V DIFF) Enable Input Voltage (V IN) −65˚C Storage Temperature Range (T STG) Lead Temperature (Soldering 4 sec.) Maximum Power Dissipation at 25˚C (Note 5) Ceramic “J” Pkg. Plastic “N” Pkg. SOIC “M” Pkg. 7V Operating Conditions ± 14V ± 14V 7V to +150˚C 260˚C Supply Voltage (VCC) Operating Temperature Range (TA) DS26C32AT DS26C32AM Enable Input Rise or Fall Times 2308 mW 1645 mW 1190 mW Min 4.50 Max 5.50 Units V −40 −55 +85 +125 500 ˚C ˚C ns DC Electrical Characteristics VCC = 5V ± 10% (unless otherwise specified) (Note 1) Symbol VTH RIN IIN VOH Parameter VIH Min Typ Max Units −200 35 +200 mV V Input Voltage Input Resistance −7V < VCM < +7V VIN = −7V, +7V DS26C32AT 5.0 6.8 10 kΩ DS26C32AM 4.5 6.8 11 kΩ Input Current (Other Input = GND) VIN = +10V, DS26C32AT +1.1 +1.5 mA Other Input = GND VIN = −10V, Other Input = GND V CC = Min, VDIFF = +1V I OUT = −6.0 mA DS26C32AM +1.1 +1.8 mA Minimum High Level Output Voltage VOL Conditions = VOH or VOL Minimum Differential Maximum Low Level V Output Voltage I OUT CC OUT DS26C32AT −2.0 −2.5 mA DS26C32AM −2.0 −2.7 mA 3.8 = Max, VDIFF = −1V = 6.0 mA 4.2 V 0.2 Minimum Enable High 0.3 2.0 V V Input Level Voltage VIL Maximum Enable Low 0.8 V ± 5.0 µA ± 1.0 µA Input Level Voltage IOZ II Output Leakage Current V OUT = VCC or GND, ENABLE = VIL, ENABLE = VIH Maximum Enable Input V Maximum TRI-STATE ® IN ± 0.5 = VCC or GND Current ICC Quiescent Power Supply Current VHYST Input Hysteresis VCC = Max, VDIF = +1V V CM = 0V DS26C32AT 16 23 mA DS26C32AM 16 25 mA 60 mV AC Electrical Characteristics VCC = 5V ± 10% (Note 3) Symbol Parameter Conditions tPLH, Propagation Delay CL = 50 pF tPHL Input to Output VDIFF = 2.5V VCM = 0V www.national.com Min 10 2 Typ 19 Max Units DS26C32AT DS26C32AM 30 35 ns AC Electrical Characteristics (Continued) VCC = 5V ± 10% (Note 3) Symbol Parameter Conditions Min Typ Max Units DS26C32AT DS26C32AM 4 9 9 ns tRISE, Output Rise and CL = 50 pF tFALL Fall Times VDIFF = 2.5V VCM = 0V tPLZ, Propagation Delay tPHZ ENABLE to Output CL = 50 pF RL = 1000Ω VDIFF = 2.5V 13 22 29 ns CL = 50 pF RL = 1000Ω VDIFF = 2.5V 13 23 29 ns tPZL, Propagation Delay tPZH ENABLE to Output 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 device should be operated at these limits. The table of “Electrical Characteristics” provides conditions for actual device operation. Note 2: Unless otherwise specified, all voltages are referenced to ground. Note 3: Unless otherwise specified, Min/Max limits apply over recommended operating conditions. All typicals are given for VCC = 5V and TA = 25˚C. Note 4: ESD Rating: HBM (1.5 kΩ, 100 pF) Inputs ≥2000V All other pins ≥1000V EIAJ (0Ω, 200 pF) ≥350V Note 5: Ratings apply to ambient temperature at 25˚C. Above this temperature derate N Package 13.16 mW/˚C, J Package 15.38 mW/˚C, M Package 9.52 mW/˚C, E Package 12.04 mW/˚C, and W package 6.94 mW/˚C. Comparison Table of Switching Characteristics into “LS-Type” Load (Figures 4, 5, 6) (Note 6) Symbol tPLH Parameter Input to Output Conditions CL = 15 pF tPHL tLZ ENABLE to Output CL = 5 pF tHZ tZL ENABLE to Output CL = 15 pF tZH DS26C32A DS26LS32A Typ Typ Units 17 23 ns 19 23 ns 13 15 ns 12 20 ns 13 14 ns 13 15 ns Note 6: This table is provided for comparison purposes only. The values in this table for the DS26C32A reflect the performance of the device, but are not tested or guaranteed. Test and Switching Waveforms DS008764-3 FIGURE 1. Propagation Delay 3 www.national.com Test and Switching Waveforms (Continued) DS008764-4 CL includes load and test jig capacitance. S1 = VCC for t PZL, and tPLZ measurements. S1 = Gnd for tPZH and tPHZ measurements. FIGURE 2. Test Circuit for TRI-STATE Output Tests DS008764-5 FIGURE 3. TRI-STATE ® Output Enable and Disable Waveforms AC Test Circuit and Switching Time Waveforms DS008764-6 FIGURE 4. Load Test Circuit for TRI-STATE Outputs for “LS-Type” Load DS008764-7 FIGURE 5. Propagation Delay for “LS-Type” Load (Notes 7, 9) www.national.com 4 AC Test Circuit and Switching Time Waveforms (Continued) DS008764-8 FIGURE 6. Enable and Disable Times for “LS-Type” Load (Notes 8, 9) Note 7: Diagram shown for ENABLE low. Note 8: S1 and S2 of load circuit are closed except where shown. Note 9: Pulse generator for all pulses: Rate ≤ 1.0 MHz; ZO = 50Ω; tr ≤ 15 ns; t f ≤ 6.0 ns. Truth Table ENABLE ENABLE Input L H X All Other Combinations of Enable Inputs Output Z VID ≥ V TH (Max) VID ≤ V TH (Min) Open H L H Z = TRI-STATE Typical Applications Two-Wire Balanced Systems, RS-422 DS008764-9 Typical Performance Characteristics Differential Propagation Delay vs Temperature Differential Propagation Delay vs Power Supply Voltage Differential Skew vs Temperature DS008764-15 DS008764-13 DS008764-14 5 www.national.com Typical Performance Characteristics Differential Skew vs Power Supply Voltage (Continued) Output High Voltage vs Output High Current DS008764-16 Output Low Voltage vs Output Low Current Output High Voltage vs Output High Current DS008764-17 Output Low Voltage vs Output Low Current DS008764-19 Input Resistance vs Input Voltage DS008764-20 Hysteresis & Differential Transition Voltage vs Temperature Input Current vs Power Supply Voltage DS008764-18 DS008764-21 Hysteresis & Differential Transition Voltage vs Power Supply Voltage DS008764-22 DS008764-23 www.national.com 6 DS008764-24 Typical Performance Characteristics Supply Current vs Temperature (Continued) Disabled Supply Current vs Power Supply Voltage DS008764-25 DS008764-26 7 Supply Current vs Data Rate DS008764-27 www.national.com Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead Ceramic Leadless Chip Carrier (E) Order Number DS26C32AME/883 NS Package Number E20A 16-Lead Ceramic Dual-In-Line Package (J) Order Number DS26C32AMJ/883 NS Package Number J16A www.national.com 8 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Molded Small Outline Package (M) Order Number DS26C32ATM NS Package Number M16A 16-Lead Molded Dual-In-Line Package (N) Order Number DS26C32ATN NS Package Number N16E 9 www.national.com DS26C32AT/DS26C32AM Quad Differential Line Receiver Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Ceramic FlatPak (W) Order Number DS26C32AMW/883 NS Package Number W16A 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: 2. A critical component in any component of a life support 1. Life support devices or systems are devices or sysdevice or system whose failure to perform can be reatems which, (a) are intended for surgical implant into sonably expected to cause the failure of the life support the body, or (b) support or sustain life, and whose faildevice or system, or to affect its safety or effectiveness. ure 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. 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