74148

MM54HC148 NSC | Alldatasheet

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Y Typical propagation delay: 13 ns Y Wide supply voltage range: 2V–6V Connection Diagram Dual-In-Line Package TL/F/9390–1 Order Number MM54HC148 or MM74HC148 Truth Table Inputs Outputs E I01234567A 2 A 1 A 0 G S E O HXXXXXXXX H H H H H L HHHHHHHH H H H H L L XXXXXXXL L L L L H L XXXXXXLH L L H L H L XXXXXLHH L H L L H LX X X X L H H H L H H L H LX X X L H H H HH L L L H L XX LHHHHH H L H L H L X LHHHHHH H H L L H L LHHHHHHH H H H L H H e High, L e Low, X e irrelevant C1995 National Semiconductor Corporation RRD-B30M105/Printed in U. S. A.

Absolute Maximum Ratings (Notes1&2 ) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Supply Voltage (V CC) b0.5 to a7.0V DC Input Voltage (V IN) b1.5 to V CC a1.5V DC Output Voltage (V OUT) b0.5 to V CC a0.5V Clamp Diode Current (I IK,I OK) g20 mA DC Output Current, per pin (I OUT) g25 mA DC V CC or GND Current, per pin (I CC) g50 mA Storage Temperature Range (T STG) b65§Ct o a150§C Power Dissipation (P D) (Note 3) 600 mW S.O. Package only 500 mW Lead Temperature (T (Soldering 10 sec.) 260 §C Operation Conditions Min Max Units Supply Voltage (V CC)2 6 V DC Input or Output Voltage 0 V CC V (VIN,V OUT) Operating Temperature Range (T A) MM74HC b40 a85 §C MM54HC b55 a125 §C Input Rise or Fall Times (tr,t f)V CC e 2.0V 1000 ns VCC e 4.5V 500 ns VCC e 6.0V 400 ns TA e 25§C 74HC 54HC Symbol Parameter Conditions V CC TA eb 40 to 85 §CT A eb 55 to 125 §C Units Typ Guaranteed Limits VIH Minimum High Level 2.0V 1.5 1.5 1.5 V Input Voltage 4.5V 3.15 3.15 3.15 V 6.0V 4.2 4.2 4.2 V VIL Maximum Low Level 2.0V 0.5 0.5 0.5 V Input Voltage 4.5V 1.35 1.35 1.35 V 6.0V 1.8 1.8 1.8 V VOH Minimum High Level V IN e VIH or V IL VIN e VIH or V IL VOL Maximum Low Level V IN e VIH or V IL Output Voltage lIOUTl s 20 mA 2.0V 0 0.1 0.1 0.1 V 4.5V 0 0.1 0.1 0.1 V 6.0V 0 0.1 0.1 0.1 V VIN e VIH or V IL IIN Maximum Input V IN e VCC or GND 6.0V g0.1 g1.0 g1.0 mA Current ICC Maximum Quiescent V IN e VCC or GND 6.0V 8.0 80 160 mA Supply Current I OUT e 0 mA Note 1: Absolute Maximum Ratings are those values beyond which damage to the device may occur. Note 2: Unless otherwise specified all voltages are referenced to ground. Note 3: Power Dissipation temperature deratingÐplastic ‘‘N’’ package: b12 mW/ §C from 65 §Ct o8 5 §C, ceramic ‘‘J’’ package: b12 mW/ §C from 100 §Ct o1 2 5 §C. Note 4: For a power supply of 5V g10% the worst case output voltages (V OH, and V OL) occur for HC at 4.5V. Thus the 4.5V values should be used when designing IOZ) occur for CMOS at the higher voltage and so the 6.0V values should be used. VIL limits are currently tested at 20% of V CC. The above V IL specification (30% of V CC) will be implemented no later than Q1, CY’89.

Symbol Parameter Conditions Typ Units tPHL,t PLH Maximum Propagation Delay, 14 nsAny Input to Any Output TA e 25§C 74HC 54HC Symbol Parameter V CC b40§Ct o a85§C b55§Ct o a125§C Units Typ Guaranteed Limits tPHL,t PLH Inputs 0–7 2.0V 140 175 210 ns to Outputs 4.5V 14 28 35 42 ns A0, A1, A2 6.0V 24 30 36 ns tPHL,t PLH Inputs 0–7 2.0V 140 175 210 ns to 4.5V 15 28 35 42 ns Output EO 6.0V 24 30 36 ns tPHL,t PLH Inputs 0–7 2.0V 160 200 240 ns to 4.5V 17 32 40 48 ns Output GS 6.0V 27 34 41 ns tPHL,t PLH Input EI 2.0V 160 200 240 ns to Outputs 4.5V 17 32 40 48 ns A0, A1, A2 6.0V 27 34 41 ns tPHL,t PLH Input EI 2.0V 100 125 150 ns to 4.5V 12 20 25 30 ns Output GS 6.0V 17 21 26 ns tPHL,t PLH Input EI 2.0V 100 125 150 ns to 4.5V 12 20 25 30 ns Output EO 6.0V 17 21 26 ns tf,t r Maximum 2.0V 75 95 110 ns Output Rise 4.5V 7 15 19 22 ns and Fall Time 6.0V 13 16 19 ns Cpd Power Dissipation 52 pFCapacitance (Note 5) Cin Maximum Input 51 0 1 0 1 0 p FCapacitance Note 5: Cpd determines the no load dynamic power consumption, and the no load dynamic current consumption.

HC148 Schematic for Datasheet TL/F/9390–3

TL/F/9390–2 Physical Dimensions inches (millimeters) Ceramic Dual-In-Line Package (J) Order Number MM54HC148 or MM74HC148

MM54HC148/MM74HC148 8-3 Line Priority Encoder Physical Dimensions inches (millimeters) (Continued) Molded Dual-In-Line Package (N) Order Number MM54HC148 or MM74HC148 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: 1. Life support devices or systems are devices or 2. A critical component is any component of a life systems which, (a) are intended for surgical implant support device or system whose failure to perform can into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life failure to perform, when properly used in accordance support device or system, or to affect its safety or with instructions for use provided in the labeling, can effectiveness. be reasonably expected to result in a significant injury to the user. National Semiconductor National Semiconductor National Semiconductor National Semiconductor Corporation Europe Hong Kong Ltd. Japan Ltd.

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