MM54HC147 MM74HC147 C1995 RRD-B30M115 MM74HC MM54HC MM54HC147J MM74HC147J

10-to-4 Line Priority Encoder General Description This high speed 10-to-4 Line Priority Encoder utilizes advanced silicon-gate

MM54HC147 MM54HC147 MM74HC147 MM74HC147 10-to-4 Line Priority Encoder General Description This high speed 10-to-4 Line Priority Encoder utilizes advanced silicon-gate CMOS technology It possesses the high noise immunity and low power consumption of standard CMOS integrated circuits This device is fully buffered giving it a fanout of 10 LS-TTL loads The MM54HC147 MM54HC147 MM74HC147 MM74HC147 features priority encoding of the inputs to ensure that only the highest order data line is encoded Nine input lines are encoded to a four line BCD output The implied decimal zero condition requires no input condition as zero is encoded when all nine data lines are at a high logic level All data inputs and outputs are active at the low logic level The 54HC 74HC logic family is functionally as well as pinout compatible with the standard 54LS 74LS logic family All inputs are protected from damage due to static discharge by internal diode clamps to VCC and ground Features Y Y Y Y Low quiescent power consumption 40 mW maximum at 25 C High speed 31 ns propagation delay (typical) Low input current 1 mA maximum Wide supply range 2V to 6V Connection and Logic Diagrams Dual-In-Line Package TL F 5007 1 Top View Order Number MM54HC147 MM54HC147 or MM74HC147 MM74HC147 Truth Table Inputs Outputs 1 2 3 4 5 6 7 8 9 D C B A H X X X X X X X X L H X X X X X X X L H H X X X X X X L H H H X X X X X L H H H H X X X X L H H H H H X X X L H H H H H H X X L H H H H H H H X L H H H H H H H H L H H H H H H H H H L L H H H H H H H H H H L L L L H H H H H H L L H H L L H H L H L H L H L H L TL F 5007 2 H e High Logic Level L e Low Logic Level X e Irrelevant C1995 C1995 National Semiconductor Corporation TL F 5007 RRD-B30M115 RRD-B30M115 Printed in U S A MM54HC147 MM54HC147 MM74HC147 MM74HC147 10-to-4 Line Priority Encoder November 1995 Absolute Maximum Ratings (Notes 1 Operating Conditions 2) If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage (VCC) DC Input or Output Voltage (VIN VOUT) b 0 5 to a 7 0V Supply Voltage (VCC) b 1 5 to VCC a 1 5V DC Input Voltage (VIN) b 0 5 to VCC a 0 5V DC Output Voltage (VOUT) g 20 mA Clamp Diode Current (IIK IOK) g 25 mA DC Output Current per pin (IOUT) g 50 mA DC VCC or GND Current per pin (ICC) b 65 C to a 150 C Storage Temperature Range (TSTG) Power Dissipation (PD) (Note 3) 600 mW S O Package only 500 mW Lead Temp (TL) (Soldering 10 seconds) 260 C Operating Temp Range (TA) MM74HC MM74HC MM54HC MM54HC Min 2 Max 6 0 VCC Units V V b 40 b 55 a 85 a 125 C C 1000 500 400 ns ns ns Input Rise or Fall Times VCC e 2 0V (tr tf) VCC e 4 5V VCC e 6 0V DC Electrical Characteristics (Note 4) Symbol Parameter Conditions TA e 25 C VCC 74HC TA eb40 to 85 C Typ 54HC TA eb55 to 125 C Units Guaranteed Limits VIH Minimum High Level Input Voltage 2 0V 4 5V 6 0V 15 3 15 42 15 3 15 42 15 3 15 42 V V V VIL Maximum Low Level Input Voltage 2 0V 4 5V 6 0V 05 1 35 18 05 1 35 18 05 1 35 18 V V V VOH Minimum High Level Output Voltage VIN e VIH or VIL lIOUTl s20 mA 2 0V 4 5V 6 0V 20 45 60 19 44 59 19 44 59 19 44 59 V V V 4 5V 6 0V 47 52 3 98 5 48 3 84 5 34 37 52 V V 2 0V 4 5V 6 0V 0 0 0 01 01 01 01 01 01 01 01 01 V V V VIN e VIH or VIL lIOUTl s4 0 mA lIOUTl s5 2 mA 4 5V 6 0V 02 02 0 26 0 26 0 33 0 33 04 04 V V VIN e VIH or VIL lIOUTl s4 0 mA lIOUTl s5 2 mA VOL Maximum Low Level Output Voltage VIN e VIH or VIL lIOUTl s20 mA IIN Maximum Input Current VIN e VCC or GND 6 0V g0 1 g1 0 g1 0 mA ICC Maximum Quiescent Supply Current VIN e VCC or GND IOUT e 0 mA 6 0V 80 80 160 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 derating plastic ``N'' package b 12 mW C from 65 C to 85 C ceramic ``J'' package b 12 mW C from 100 C to 125 C Note 4 For a power supply of 5V g 10% the worst case output voltages (VOH and VOL) occur for HC at 4 5V Thus the 4 5V values should be used when designing with this supply Worst case VIH and VIL occur at VCC e 5 5V and 4 5V respectively (The VIH value at 5 5V is 3 85V ) The worst case leakage current (IIN ICC and 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 VCC The above VIL specification (30% of VCC) will be implemented no later than Q1 CY'89 2 AC Electrical Characteristics VCC e 5V Symbol Parameter tPHL tPLH TA e 25 C CL e 15 pF tr e tf e 6 ns Typ Guaranteed Limit Units 31 Conditions 38 ns Maximum Propagation Delay AC Electrical Characteristics VCC e 2 0V to 6 0V Symbol Parameter Conditions VCC CL e 50 pF tr e tf e 6 ns (unless otherwise specified) TA e 25 C Typ 74HC TA eb40 to 85 C 54HC TA eb55 to 125 C Units Guaranteed Limits tPHL tPLH Maximum Propagation Delay 2 0V 4 5V 6 0V 181 36 31 220 44 37 275 55 47 319 64 54 ns ns ns tTLH tTHL Maximum Output Rise and Fall Time 2 0V 4 5V 6 0V 30 8 7 75 15 13 95 19 16 110 22 19 ns ns ns CPD Power Dissipation Capacitance (Note 5) CIN Maximum Input Capacitance (per package) 180 5 pF 10 10 10 pF Note 5 CPD determines the no load dynamic power consumption PD e CPD VCC2 f a ICC VCC and the no load dynamic current consumption IS e CPD VCC f a ICC 3 MM54HC147 MM54HC147 MM74HC147 MM74HC147 10-to-4 Line Priority Encoder Physical Dimensions inches (millimeters) Order Number MM54HC147J MM54HC147J or MM74HC147J MM74HC147J NS Package J16A Order Number MM74HC147N MM74HC147N NS Package N16E 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 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 National Semiconductor Corporation 1111 West Bardin Road Arlington TX 76017 Tel 1(800) 272-9959 Fax 1(800) 737-7018 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 National Semiconductor Europe Fax (a49) 0-180-530 85 86 Email cnjwge tevm2 nsc com Deutsch Tel (a49) 0-180-530 85 85 English Tel (a49) 0-180-532 78 32 Fran ais Tel (a49) 0-180-532 93 58 Italiano Tel (a49) 0-180-534 16 80 National Semiconductor Hong Kong Ltd 13th Floor Straight Block Ocean Centre 5 Canton Rd Tsimshatsui Kowloon Hong Kong Tel (852) 2737-1600 Fax (852) 2736-9960 National Semiconductor Japan Ltd Tel 81-043-299-2309 Fax 81-043-299-2408 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