74LS147

SN74LS147 ONSEMI | Alldatasheet

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 Semiconductor Components Industries, LLC, 1999 December, 1999 – Rev. 6

1 Publication Order Number:

/C0083/C0078/C0055/C0052/C0076/C0083/C0049/C0052/C0055 /C0083/C0078/C0055/C0052/C0076/C0083/C0049/C0052/C0056 /C0049/C0048/C0045/C0076/C0105/C0110/C0101/C0045/C0116/C0111/C0045/C0052/C0045/C0076/C0105/C0110/C0101 /C0097/C0110/C0100 /C0056/C0045/C0076/C0105/C0110/C0101/C0045/C0116/C0111/C0045/C0051/C0045/C0076/C0105/C0110/C0101 /C0080/C0114/C0105/C0111/C0114/C0105/C0116/C0121 /C0069/C0110/C0099/C0111/C0100/C0101/C0114/C0115 The SN74LS147 and the SN74LS148 are Priority Encoders. They provide priority decoding of the inputs to ensure that only the highest order data line is encoded. Both devices have data inputs and outputs which are active at the low logic level. The LS147 encodes nine data lines to four-line (8-4-2-1) BCD. The implied decimal zero condition does not require an input condition because zero is encoded when all nine data lines are at a high logic level. The LS148 encodes eight data lines to three-line (4-2-1) binary (octal). By providing cascading circuitry (Enable Input EI and Enable Output EO) octal expansion is allowed without needing external circuitry. GUARANTEED OPERATING RANGES Symbol Parameter Min Typ Max Unit VCC Supply Voltage 4.75 5.0 5.25 V TA Operating Ambient Temperature Range 0 25 70 °C IOH Output Current – High –0.4 mA IOL Output Current – Low 8.0 mA LOW POWER SCHOTTKY Device Package Shipping

ORDERING INFORMATION

SN74LS147N 16 Pin DIP 2000 Units/Box SN74LS147D 16 Pin SOIC D SUFFIX CASE 751B http://onsemi.com 2500/Tape & Reel PLASTIC N SUFFIX CASE 648 SN74LS148N 16 Pin DIP SN74LS148D 16 Pin

2000 Units/Box

2500/Tape & Reel

http://onsemi.com SN74LS147 (TOP VIEW) SN74LS148 (TOP VIEW) 4 5 6 7 8 C B GND D321 9 AVCC NC 14 13 12 11 10 9 12345 6 7 16 15 D321 9 567 8 C B OUTPUT INPUTS OUTPUT INPUTS OUTPUTS 4 5 6 7 E1 A2 A1 GND VCC EO GS 3 2 1 0 A0 14 13 12 11 10 9 12345 6 7 16 15 EO GS 3 2 1 0 A04 56 7 E I A 2 A 1 OUTPUTS INPUTS OUTPUT INPUTS OUTPUTS

http://onsemi.com SN74LS147 FUNCTION TABLE INPUTS OUTPUTS 1 2 3 4 5 6 7 8 9 D C B A H H H H H H H H H H H H H X XXXXXXXLL HHL X XXXXXXLHL HHH X XXXXXLHHH LLL X XXXXLHHHH LLH X XXXLHHHHH LHL X XXLHHHHHH LHH X XLHHHHHHH HLL X LHHHHHHHH HLH L H H H H H H H H H H H L SN74LS148 FUNCTION TABLE INPUTS OUTPUTS EI 0 1 2 3 4 5 6 7 A2 A1 A0 GS EO H X X X X X X X X H H H H H L HHHHHHHH H HH H L L XXXXXXXL L LL L H L XXXXXXLH L LH L H L XXXXXLHH L HL L H L XXXXLHHH L HH L H L XXXLHHHH H LL L H L XXLHHHHH H LH L H L XLHHHHHH H HL L H L L H H H H H H H H H H L H H = HIGH Logic Level, L = LOW Logic Level, X = Irrelevant FUNCTIONAL BLOCK DIAGRAMS SN74LS147 SN74LS148 (11) (12) (13) (1) (2) (3) (4) (5) (10) (9) (7) (6) (14) A B C D EI (10) (11) (12) (13) (1) (2) (3) (4) (5) (15) EO (14) GS (8) (7) (6) A2

http://onsemi.com DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) Limits Symbol Parameter Min Typ Max Unit Test Conditions VIH Input HIGH Voltage 2.0 V Guaranteed Input HIGH Voltage for All Inputs VIL Input LOW Voltage 0.8 V Guaranteed Input LOW Voltage for All Inputs VIK Input Clamp Diode Voltage –0.65 –1.5 V VCC = MIN, IIN = –18 mA VOH Output HIGH Voltage 2.7 3.5 V VCC = MIN, IOH = MAX, VIN = VIH or VIL per Truth Table VO Output LOW Voltage 0.25 0.4 V IOL = 4.0 mA VCC = VCC MIN, VIN =V ILor VIHVOL O utput LOW Voltage 0.35 0.5 V IOL = 8.0 mA VIN = VIL or VIH per Truth Table IIH Input HIGH Current All Others Inputs 1–7 (LS148) µA VCC = MAX, VIN = 2.7 V IH All Others Inputs 1–7 (LS148) 0.1 0.2 mA VCC = MAX, VIN = 7.0 V IIL Input LOW Current All Others Inputs 1–7 (LS148) –0.4 –0.8 mA VCC = MAX, VIN = 0.4 V IOS Short Circuit Current (Note 1) –20 –100 mA VCC = MAX ICCH Power Supply Current Output HIGH 17 mA VCC = MAX, All Inputs = 4.5 V ICCL Output LOW 20 mA VCC = MAX, Inputs 7 & E1 = GND All Other Inputs = 4.5 V Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.

http://onsemi.com AC CHARACTERISTICS (VCC = 5.0 V, TA = 25°C) SN74LS147 From To Limits Symbol From (Input) To (Output) Waveform Min Typ Max Unit Test Conditions tPLH Any Any In-phase 12 18 ns tPHL Any Any output 12 18 ns C L = 15 pF, tPLH Any Any Out-of-phase 21 33 ns L R L = 2.0 kΩ tPHL Any Any output 15 23 ns SN74LS148 From To Limits Symbol From (Input) To (Output) Waveform Min Typ Max Unit Test Conditions tPLH 1 thru 7 A0 A1 or A2 In-phase 14 18 ns tPHL 1 thru 7 A0, A1, or A2 output 15 25 ns tPLH 1 thru 7 A0 A1 or A2 Out-of-phase 20 36 ns tPHL 1 thru 7 A0, A1, or A2 output 16 29 ns tPLH 0 thru 7 EO Out-of-phase 7.0 18 ns tPHL 0 thru 7 EO output 25 40 ns C 15 FtPLH 0 thru 7 GS In-phase 35 55 ns C L = 15 pF, R L = 2.0 kΩ tPHL 0 thru 7 GS output 9.0 21 ns R L 2.0 kΩ tPLH EI A0 A1 or A2 In-phase 16 25 ns tPHL EI A0, A1, or A2 output 12 25 ns tPLH EI GS In-phase 12 17 ns tPHL EI GS output 14 36 ns tPLH In-phase 12 21 tPHL EI EO In- hase output 28 ns (LS148)

http://onsemi.com PACKAGE DIMENSIONS N SUFFIX PLASTIC PACKAGE CASE 648–08 ISSUE R NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. 5. ROUNDED CORNERS OPTIONAL. –A– B F C S H G D J L M 16 PL SEATING 916 K PLANE–T– MAM0.25 (0.010) T DIM MIN MAX MIN MAX MILLIMETERSINCHES A 0.740 0.770 18.80 19.55 B 0.250 0.270 6.35 6.85 C 0.145 0.175 3.69 4.44 D 0.015 0.021 0.39 0.53 F 0.040 0.70 1.02 1.77 G 0.100 BSC 2.54 BSC H 0.050 BSC 1.27 BSC J 0.008 0.015 0.21 0.38 K 0.110 0.130 2.80 3.30 L 0.295 0.305 7.50 7.74 M 0 10 0 10 S 0.020 0.040 0.51 1.01 /C0095/C0095/C0095/C0095

http://onsemi.com PACKAGE DIMENSIONS D SUFFIX PLASTIC SOIC PACKAGE CASE 751B–05 ISSUE J NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. 16 9 SEATING PLANE F JM R X 45/C0095 G

8 PLP–B–

–A– M0.25 (0.010) B S –T– D K C 16 PL SBM0.25 (0.010) A ST DIM MIN MAX MIN MAX INCHESMILLIMETERS A 9.80 10.00 0.386 0.393 B 3.80 4.00 0.150 0.157 C 1.35 1.75 0.054 0.068 D 0.35 0.49 0.014 0.019 F 0.40 1.25 0.016 0.049 G 1.27 BSC 0.050 BSC J 0.19 0.25 0.008 0.009 K 0.10 0.25 0.004 0.009 M 0 7 0 7 P 5.80 6.20 0.229 0.244 R 0.25 0.50 0.010 0.019 /C0095/C0095/C0095/C0095

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