DS7834/DS8834 Quad TRI-STATEÉ Bus Transceivers General Description Features This family of TRI-STATE bus transceivers offers extreme versatility in bus organized data transmission systems. The data bus may be unterminated, or terminated DC or AC, at one or both ends. Drivers in the third (high impedance) state load the data bus with a negligible leakage current. The receiver input current is low, allowing at least 100 driver/receiver pairs to utilize a single bus. The bus loading is unchanged when VCC e 0V. The receiver incorporates hysteresis to provide greater noise immunity. Both devices utilize a high current TRI-STATE output driver. The DS7834/ DS8834 employs TTL outputs on the receiver. The DS7834/DS8834 are inverting quad transceivers with two common inverter driver disable controls. Y Y Y Y Y Y Y Y Y Receiver hysteresis Receiver noise immunity Bus terminal current for normal VCC or VCC e 0V Receivers Sink Source 400 mV typ 1.4V typ 80 mA max 16 mA at 0.4V max 2.0 mA (Mil) at 2.4V min 5.2 mA (Com) at 2.4V min Drivers Sink 50 mA at 0.5V max 32 mA at 0.4V max Source 10.4 mA (Com) at 2.4V min 5.2 mA (Mil) at 2.4V min Drivers have TRI-STATE outputs Receivers have TRI-STATE outputs Capable of driving 100X DC-terminated Buses Compatible with Series 54/74 Connection Diagram Dual-In-Line Package TL/F/5809 – 1 Top View Order Number DS7834J, or DS8834N See NS Package Number J16A or N16A TRI-STATEÉ is a registered trademark of National Semiconductor Corp. C1996 National Semiconductor Corporation TL/F/5809 RRD-B30M36/Printed in U. S. A. http://www.national.com DS7834/DS8834 Quad TRI-STATE Bus Transceivers February 1996 Absolute Maximum Ratings (Note 1) Storage Temperature If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Supply Voltage Input Voltage Output Voltage Maximum Power Dissipation* at 25§ C Cavity Package Molded Package b 65§ C to a 150§ C Lead Temperature (Soldering, 4 seconds) 260§ C Operating Conditions 7.0V 5.5V 5.5V Supply Voltage (VCC) DS7834 DS8834 Temperature (TA) DS7834 DS8834 1509 mW 1476 mW *Derate cavity package 10.1 mW/§ C above 25§ C; derate molded package 11.8 mW/§ C above 25§ C. Min Max Units 4.5 4.75 5.5 5.25 V V b 55 a 125 a 70 §C §C 0 Electrical Characteristics (Notes 2 and 3) Symbol Parameter Conditions Min Typ Max Units 0.8 V DISABLE/DRIVER INPUT VIH High Level Input Voltage VCC e Min VIL Low Level Input Voltage VCC e Min IIH High Level Input Current VCC e Max 2.0 V VIN e 2.4V 40 mA VIN e 5.5V 1.0 mA b 1.6 mA b 40 mA b 1.5 V IIL Low Level Input Current VCC e Max, VIN e 0.4V IIND Driver Diasbled Input Low Current Driver Disable Input e 2.0V, VIN e 0.4V b 1.0 VCL Input Clamp Diode VCC e 5.0V, IIN e b12 mA, TA e 25§ C b 0.8 RECEIVER INPUT/BUS OUTPUT VTH VTL IBH High Level Threshold Voltage Low Level Threshold Voltage Bus Current, Output Disabled or High VCC e Max VCC e Min VBUS e 4.0V DS7834 1.4 1.75 2.1 V DS8834 1.5 1.75 2.0 V DS7834 0.8 1.35 1.6 V DS8834 0.8 1.35 1.5 V VCC e Max, Disable Input e 2.0V 25 80 mA VCC e 0V 5.0 80 mA b 40 mA VCC e Max, VSUS e 0.4V, Disable Input e 2.0V VOH VOL Logic ‘‘1’’ Output Voltage Logic ‘‘0’’ Output Voltage VCC e Min VCC e Min IOUT e b5.2 mA DS7834 2.4 2.75 IOUT e b10.4 mA DS7834 2.4 2.75 IOUT e 50 mA 0.28 IOUT e 32 mA IOS Output Short Circuit Current VCC e Max, (Note 4) b 40 b 62 3.0 V V 0.5 V 0.4 V b 120 mA RECEIVER OUTPUT VOH Logic ‘‘1’’ Output Voltage VCC e Min IOUT e b2.0 mA DS7834 2.4 IOUT e b5.2 mA DS8834 2.4 VOL Logic ‘‘0’’ Output Voltage VCC e Min, IOUT e 16 mA IOS Output Short Circuit Current VCC e Max, (Note 4) ICC Supply Current VCC e Max DS7834 b 28 DS8834 b 30 V 2.9 V 0.22 0.4 V b 40 b 70 mA b 70 mA 95 mA 75 Note 1: ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaranteed. Except for ‘‘Operating Temperature Range’’ they are not meant to imply that the devices should be operated at these limits. The table of ‘‘Electrical Characteristics’’ provides conditions for actual device operation. Note 2: Unless otherwise specified, min/max limits apply across the b 55§ C to a 125§ C temperature range for the DS7834 and across the 0§ C to a 70§ C range for the DS8834. All typicals are given for VCC e 5.0V and TA e 25§ C. Note 3: All currents into device pins shown as positive, out of device pins as negative, all voltages referenced to ground unless otherwise noted. All values shown as max or min on absolute value basis. Note 4: Only one output at a time should be shorted. http://www.national.com 2 Switching Characteristics VCC e 5.0V, TA e 25§ C Symbol Parameter Conditions Min Typ Max Units 10 20 ns 11 30 ns 16 35 ns 18 30 ns CL e 5.0 pF, (Figures 1 and 2) Driver Only 8 20 ns Delay from Disable Input to High Impedance State (from Logic ‘‘0’’ Level) CL e 5.0 pF, (Figures 1 and 2) Driver Only 20 35 ns tPZH Delay from Disable Input to Logic ‘‘1’’ Level (from High Impedance State) CL e 50 pF, (Figures 1 and 2) Driver Only 24 40 ns tPZL Delay from Disable Input to Logic ‘‘0’’ Level (from High Impedance State) CL e 50 pF, (Figures 1 and 2) Driver Only 19 35 ns tpd0 Propagation Delay to a Logic ‘‘0’’ from Input to Bus (Figure 1) DS7834/DS8834 tpd1 Propagation Delay to a Logic ‘‘1’’ from Input to Bus (Figure 1) DS7834/DS8834 tpd0 Propagation Delay to a Logic ‘‘0’’ from Bus to Output (Figure 2) DS7834/DS8834 tpd1 Propagation Delay to a Logic ‘‘1’’ from Bus to Output (Figure 2) DS7834/DS8834 tPHZ Delay from Disable Input to High Impedance State (from Logic ‘‘1’’ Level) tPLZ AC Test Circuit TL/F/5809 – 4 TL/F/5809 – 3 FIGURE 2. Receiver Output Load FIGURE 1. Driver Output Load Switching Time Waveforms tpd1 and tpd0 tPLZ TL/F/5809 – 6 TL/F/5809 – 5 f e 1 MHz tr e tf s 10 ns (10% to 90%) Duty Cycle e 50% 3 http://www.national.com Switching Time Waveforms (Continued) tPHZ TL/F/5809 – 7 tPZL TL/F/5809 – 8 tPZH TL/F/5809 – 9 Truth Table Disable Input Driver Input (INX) Receiver Input/ Bus Output (BUSX) Receiver Output (OUTX) Mode of Operation 0 1 BUS 1 0 Receive Bus Signal Drive Bus Drive Bus DS7834/DS8834 1 0 0 X 1 0 X e Don’t care http://www.national.com 4 Physical Dimensions inches (millimeters) Ceramic Dual-In-Line Package (J) Order Number DS7834J NS Package Number J16A 5 http://www.national.com DS7834/DS8834 Quad TRI-STATE Bus Transceivers Physical Dimensions inches (millimeters) (Continued) Molded Dual-In-Line Package (N) Order Number DS8834N NS Package Number N16A 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. 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