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| M54HC148 RAD-HARD 8 TO 3 LINE PRIORITY ENCODER s s s s s s s s s s s HIGH SPEED: tPD = 16ns (TYP.) at VCC = 6V LOW POWER DISSIPATION: ICC = 4A(MAX.) at TA=25C HIGH NOISE IMMUNITY: VNIH = VNIL = 28% VCC (MIN.) SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 4mA (MIN) BALANCED PROPAGATION DELAYS: tPLH tPHL WIDE OPERATING VOLTAGE RANGE: VCC (OPR) = 2V to 6V PIN AND FUNCTION COMPATIBLE WITH 54 SERIES 148 SPACE GRADE-1: ESA SCC QUALIFIED 50 krad QUALIFIED, 100 krad AVAILABLE ON REQUEST NO SEL UNDER HIGH LET HEAVY IONS IRRADIATION DEVICE FULLY COMPLIANT WITH SCC-9410-017 DILC-16 FPC-16 ORDER CODES PACKAGE DILC FPC FM M54HC148D M54HC148K EM M54HC148D1 M54HC148K1 DESCRIPTION The M54HC148 is an high speed CMOS 8 TO 3 LINE PRIORITY ENCODER fabricated with silicon gate C2MOS technology. The M54HC148 encodes eight data lines to three-line (4-2-1) binary (octal). Cascading circuitry (enable input EI and enable output EO) has been provided to allow octal expansion without the need for external circuitry. Data inputs are active at the low logic level. All inputs are equipped with protection circuits against static discharge and transient excess voltage. PIN CONNECTION March 2004 1/10 M54HC148 IEC LOGIC SYMBOLS INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN N 9, 7, 6 10, 11, 12, 13, 1, 2, 3, 4 15 5 14 8 16 SYMBOL A0 to A2 0 to 7 EO EI GS GND VCC NAME AND FUNCTION Data Outputs Data Inputs Enable Output Enable Input Priority Flag Output Ground (0V) Positive Supply Voltage TRUTH TABLE INPUTS E1 H L L L L L L L L L 0 X H X X X X X X X L 1 X H X X X X X X L H 2 X H X X X X X L H H 3 X H X X X X L H H H 4 X H X X X L H H H H 5 X H X X L H H H H H 6 X H X L H H H H H H 7 X H L H H H H H H H A2 H H L L L L H H H H A1 H H L L H H L L H H OUTPUTS A0 H H L H L H L H L H GS H H L L L L L L L L E0 H L H H H H H H H H X : Don't Care 2/10 M54HC148 LOGIC DIAGRAM This logic diagram has not be used to estimate propagation delays ABSOLUTE MAXIMUM RATINGS Symbol VCC VI VO IIK IOK IO PD Tstg TL Supply Voltage DC Input Voltage DC Output Voltage DC Input Diode Current DC Output Diode Current DC Output Current Power Dissipation Storage Temperature Lead Temperature (10 sec) Parameter Value -0.5 to +7 -0.5 to VCC + 0.5 -0.5 to VCC + 0.5 20 20 25 50 300 -65 to +150 265 Unit V V V mA mA mA mA mW C C ICC or IGND DC VCC or Ground Current Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied 3/10 M54HC148 RECOMMENDED OPERATING CONDITIONS Symbol VCC VI VO Top tr, tf Supply Voltage Input Voltage Output Voltage Operating Temperature Input Rise and Fall Time VCC = 2.0V VCC = 4.5V VCC = 6.0V Parameter Value 2 to 6 0 to VCC 0 to VCC -55 to 125 0 to 1000 0 to 500 0 to 400 Unit V V V C ns ns ns DC SPECIFICATIONS Test Condition Symbol Parameter VCC (V) 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 4.5 6.0 VOL Low Level Output Voltage 2.0 4.5 6.0 4.5 6.0 II ICC Input Leakage Current Quiescent Supply Current 6.0 6.0 IO=-20 A IO=-20 A IO=-20 A IO=-4.0 mA IO=-5.2 mA IO=20 A IO=20 A IO=20 A IO=4.0 mA IO=5.2 mA VI = VCC or GND VI = VCC or GND TA = 25C Min. 1.5 3.15 4.2 0.5 1.35 1.8 1.9 4.4 5.9 4.18 5.68 2.0 4.5 6.0 4.31 5.8 0.0 0.0 0.0 0.17 0.18 0.1 0.1 0.1 0.26 0.26 0.1 4 1.9 4.4 5.9 4.13 5.63 0.1 0.1 0.1 0.33 0.33 1 40 Typ. Max. Value -40 to 85C Min. 1.5 3.15 4.2 0.5 1.35 1.8 1.9 4.4 5.9 4.10 5.60 0.1 0.1 0.1 0.40 0.40 1 80 A A V V Max. -55 to 125C Min. 1.5 3.15 4.2 0.5 1.35 1.8 Max. V Unit VIH High Level Input Voltage Low Level Input Voltage High Level Output Voltage VIL V VOH 4/10 M54HC148 AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6ns) Test Condition Symbol Parameter VCC (V) 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 TA = 25C Min. Typ. 30 8 7 60 19 16 60 19 16 40 14 12 40 14 12 40 14 12 Max. 75 15 13 150 30 26 150 30 26 115 23 20 115 23 20 115 23 20 Value -40 to 85C Min. Max. 95 19 16 190 38 32 190 38 32 145 29 25 145 29 25 145 29 25 -55 to 125C Min. Max. 110 22 19 225 45 38 225 45 38 175 35 30 175 35 30 175 35 30 ns Unit tTLH tTHL Output Transition Time tPLH tPHL Propagation Delay Time (In - A0, A1, A2) tPLH tPHL Propagation Delay Time (In - EO, GS) tPLH tPHL Propagation Delay Time (EI -EO) tPLH tPHL Propagation Delay Time (EI -GS) tPLH tPHL Propagation Delay Time (EI - A0, A1, A2) ns ns ns ns ns CAPACITIVE CHARACTERISTICS Test Condition Symbol Parameter VCC (V) 5.0 5.0 TA = 25C Min. Typ. 5 60 Max. 10 Value -40 to 85C Min. Max. 10 -55 to 125C Min. Max. 10 pF pF Unit CIN CPD Input Capacitance Power Dissipation Capacitance (note 1) 1) CPD is defined as the value of the IC's internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC 5/10 M54HC148 TEST CIRCUIT CL = 50pF or equivalent (includes jig and probe capacitance) RT = ZOUT of pulse generator (typically 50) WAVEFORM 1: PROPAGATION DELAY TIMES,FOR INVERTING AND NON INVERTING OUTPUTS (f=1MHz; 50% duty cycle) 6/10 M54HC148 TYPICAL APPLICATION 7/10 M54HC148 DILC-16 MECHANICAL DATA mm. DIM. MIN. A a1 a2 B b b1 D e e1 e2 e3 F I K L 10.90 1.14 17.65 7.62 7.29 2.1 3.00 0.63 1.82 0.40 0.20 20.06 7.36 0.45 0.254 20.32 7.62 2.54 17.78 7.87 7.49 17.90 8.12 7.70 3.83 12.1 1.5 0.429 0.045 0.695 0.300 0.287 0.88 TYP MAX. 2.71 3.70 1.14 2.39 0.50 0.30 20.58 7.87 MIN. 0.083 0.118 0.025 0.072 0.016 0.008 0.790 0.290 0.018 0.010 0.800 0.300 0.100 0.700 0.310 0.295 0.705 0.320 0.303 0.151 0.476 0.059 0.035 TYP. MAX. 0.107 0.146 0.045 0.094 0.020 0.012 0.810 0.310 inch 0056437F 8/10 M54HC148 FPC-16 MECHANICAL DATA mm. DIM. MIN. A B C D E F G H L M N 0.38 6.0 18.75 0.33 0.38 4.31 22.0 0.43 6.75 9.76 1.49 0.102 8.76 0.127 8.89 1.27 0.43 0.48 0.015 0.237 0.738 0.013 0.015 0.170 0.867 0.017 TYP 6.91 9.94 MAX. 7.06 10.14 1.95 0.152 9.01 MIN. 0.266 0.384 0.059 0.004 0.345 0.005 0.350 0.050 0.017 0.019 TYP. 0.272 0.392 MAX. 0.278 0.399 0.077 0.006 0.355 inch F G D H 16 9 A N L 1 8 H E M C B 0016030E 9/10 M54HC148 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics All other names are the property of their respective owners (c) 2004 STMicroelectronics - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. http://www.st.com 10/10 |
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