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. 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 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. Logic Diagram 00876401 Connection Diagrams 20-Lead Ceramic Leadless Chip Carrier Dual-In-Line Package 00876412 00876402 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 TRI-STATE ® is a registered trademark of National Semiconductor Corporation. © 2004 National Semiconductor Corporation DS008764 www.national.com DS26C32AT/DS26C32AM Quad Differential Line Receiver June 1998 DS26C32AT/DS26C32AM Absolute Maximum Ratings SOIC “M” Pkg. 1190 mW 1) Ceramic “E” Pkg. 2108 mW If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Ceramic “W” Pkg. 1215 mW (Notes 2, Supply Voltage (VCC) Differential Input Voltage (V Enable Input Voltage (V This device does not meet 2000V ESD rating. (Note 4) 7V ± 14V ± 14V Common Mode Range (VCM) DIFF) IN) Storage Temperature Range (T Operating Conditions 7V STG) Supply Voltage (VCC) −65˚C to +150˚C Lead Temperature (Soldering 4 sec.) 260˚C 2308 mW Plastic “N” Pkg. 1645 mW Min Max Units 4.50 5.50 V ˚C Operating Temperature Range (TA) Maximum Power Dissipation at 25˚C (Note 5) Ceramic “J” Pkg. ± 25 mA Maximum Current Per Output DS26C32AT −40 +85 DS26C32AM −55 +125 ˚C 500 ns Enable Input Rise or Fall Times DC Electrical Characteristics VCC = 5V ± 10% (unless otherwise specified) (Note 1) Symbol VTH RIN IIN VOH VOL VIH Parameter Conditions Typ Max Units −200 35 +200 mV Minimum Differential V Input Voltage −7V < VCM < +7V Input Resistance VIN = −7V, +7V DS26C32AT 5.0 6.8 10 kΩ (Other Input = GND) DS26C32AM 4.5 6.8 11 kΩ Input Current OUT = VOH or VOL Min VIN = +10V, DS26C32AT +1.1 +1.5 mA Other Input = GND DS26C32AM +1.1 +1.8 mA VIN = −10V, DS26C32AT −2.0 −2.5 mA Other Input = GND DS26C32AM −2.0 −2.7 mA Minimum High Level V Output Voltage I Maximum Low Level V Output Voltage I CC OUT CC OUT = Min, VDIFF = +1V 3.8 4.2 V = −6.0 mA = Max, VDIFF = −1V 0.2 0.3 V = 6.0 mA Minimum Enable High 2.0 V Input Level Voltage VIL Maximum Enable Low 0.8 V ± 5.0 µA ± 1.0 µA Input Level Voltage IOZ Maximum TRI-STATE ® V Output Leakage Current ENABLE = VIL, OUT = VCC or GND, ± 0.5 ENABLE = VIH II Maximum Enable Input V IN = VCC or GND Current ICC VHYST Quiescent Power VCC = Max, DS26C32AT 16 23 mA Supply Current VDIF = +1V DS26C32AM 16 25 mA Input Hysteresis V CM = 0V 60 mV Max Units AC Electrical Characteristics VCC = 5V ± 10% (Note 3) Symbol Parameter Conditions tPLH, Propagation Delay CL = 50 pF tPHL Input to Output VDIFF = 2.5V Min 10 VCM = 0V www.national.com 2 Typ 19 DS26C32AT DS26C32AM 30 35 ns (Continued) VCC = 5V ± 10% (Note 3) Symbol Parameter Conditions tRISE, Output Rise and CL = 50 pF tFALL Fall Times VDIFF = 2.5V tPLZ, Propagation Delay CL = 50 pF tPHZ ENABLE to Output RL = 1000Ω tPZL, Propagation Delay CL = 50 pF tPZH ENABLE to Output RL = 1000Ω Min Typ Max Units DS26C32AT DS26C32AM 4 9 9 ns 13 22 29 ns 13 23 29 ns VCM = 0V VDIFF = 2.5V VDIFF = 2.5V 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 Conditions Input to Output CL = 15 pF ENABLE to Output CL = 5 pF tPHL tLZ 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 00876403 FIGURE 1. Propagation Delay 3 www.national.com DS26C32AT/DS26C32AM AC Electrical Characteristics DS26C32AT/DS26C32AM Test and Switching Waveforms (Continued) 00876404 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 00876405 FIGURE 3. TRI-STATE ® Output Enable and Disable Waveforms AC Test Circuit and Switching Time Waveforms 00876406 FIGURE 4. Load Test Circuit for TRI-STATE Outputs for “LS-Type” Load www.national.com 4 DS26C32AT/DS26C32AM AC Test Circuit and Switching Time Waveforms (Continued) 00876407 FIGURE 5. Propagation Delay for “LS-Type” Load (Notes 7, 9) 00876408 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 00876409 5 www.national.com DS26C32AT/DS26C32AM Typical Performance Characteristics Differential Propagation Delay vs Temperature Differential Propagation Delay vs Power Supply Voltage 00876413 00876414 Differential Skew vs Temperature Differential Skew vs Power Supply Voltage 00876415 00876416 Output High Voltage vs Output High Current Output High Voltage vs Output High Current 00876417 www.national.com 00876418 6 DS26C32AT/DS26C32AM Typical Performance Characteristics (Continued) Output Low Voltage vs Output Low Current Output Low Voltage vs Output Low Current 00876419 00876420 Input Resistance vs Input Voltage Input Current vs Power Supply Voltage 00876422 00876421 Hysteresis & Differential Transition Voltage vs Temperature Hysteresis & Differential Transition Voltage vs Power Supply Voltage 00876423 00876424 7 www.national.com DS26C32AT/DS26C32AM Typical Performance Characteristics (Continued) Supply Current vs Temperature Disabled Supply Current vs Power Supply Voltage 00876425 00876426 Supply Current vs Data Rate 00876427 www.national.com 8 DS26C32AT/DS26C32AM 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 9 www.national.com DS26C32AT/DS26C32AM 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 www.national.com 10 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 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. 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. BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. National Semiconductor Americas Customer Support Center Email: [email protected] Tel: 1-800-272-9959 www.national.com National Semiconductor Europe Customer Support Center Fax: +49 (0) 180-530 85 86 Email: [email protected] Deutsch Tel: +49 (0) 69 9508 6208 English Tel: +44 (0) 870 24 0 2171 Français Tel: +33 (0) 1 41 91 8790 National Semiconductor Asia Pacific Customer Support Center Email: [email protected] National Semiconductor Japan Customer Support Center Fax: 81-3-5639-7507 Email: [email protected] Tel: 81-3-5639-7560 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.