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M54HC237 RAD-HARD 3 TO 8 LINE DECODER LATCH 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 237 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-9205-021 DILC-16 FPC-16 ORDER CODES PACKAGE DILC FPC FM M54HC237D M54HC237K EM M54HC237D1 M54HC237K1 DESCRIPTION The M54HC237 is an high speed CMOS 3 TO 8 LINE DECODER fabricated with silicon gate C2MOS technology. When GL goes from low to high, the address present at the select inputs (A, B, C) is stored in the latches. As long as GL remains high no address changes will be recognized. Output enable controls, G1 and G2 control the state of the outputs independently of the select or latch-enable inputs. All of the outputs are low unless G1 is high and G2 is low. The M54HC237 is ideally suited for the implementation of glitch-free decoders in stored-address applications in bus oriented systems. All inputs are equipped with protection circuits against static discharge and transient excess voltage. PIN CONNECTION April 2004 1/10 M54HC237 IEC LOGIC SYMBOLS INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN N 1, 2, 3 4 5 6 15, 14, 13, 12, 11, 10, 9, 7 8 16 SYMBOL A, B, C GL G2 G1 Y0 to Y7 NAME AND FUNCTION Data Inputs Latch Enable Input Data Enable Input (Active LOW) Data Enable Input (Active HIGH) Decoder Outputs GND VCC Ground (0V) Positive Supply Voltage TRUTH TABLE INPUTS OUTPUTS ENABLE GL X X L L L L L L L L H G2 X H L L L L L L L L L G1 L X H H H H H H H H H C X X L L L L H H H H X SELECT B X X L L H H L L H H X A X X L H L H L H L H X Y0 L L H L L L L L L L Y1 Y2 Y3 Y4 Y5 Y6 Y7 L L L L L L L L L H L L L L L L L L L L L L L L L L L L H L L L L L L H L L L L L L H L L L L L L H L L L L L L H L L L L L L H L L L L L L Outputs corresponding to stored address H: all others L X : Don't Care 2/10 M54HC237 LOGIC DIAGRAM This logic diagram has not be used to estimate propagation delays ABSOLUTE MAXIMUM RATINGS Symbol VCC VI VO IIK IOK IO Supply Voltage DC Input Voltage DC Output Voltage DC Input Diode Current DC Output Diode Current DC Output Current 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 Power Dissipation PD Tstg TL Storage Temperature Lead Temperature (10 sec) Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied 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 3/10 M54HC237 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 M54HC237 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 2.0 4.5 6.0 2.0 4.5 6.0 TA = 25C Min. Typ. 30 8 7 60 19 16 45 15 13 45 15 13 65 21 18 10 6 6 12 3 2 Max. 75 15 13 180 36 31 140 28 24 140 28 24 190 38 32 75 15 13 50 10 9 25 5 5 Value -40 to 85C Min. Max. 95 19 16 225 45 38 175 35 30 175 35 30 240 48 41 95 19 16 65 13 11 30 6 5 -55 to 125C Min. Max. 110 22 19 270 54 46 210 42 36 210 42 36 285 57 48 110 22 19 75 15 13 40 8 7 ns Unit tTLH tTHL Output Transition Time tPLH tPHL Propagation Delay Time (A, B, C - Y) tPLH tPHL Propagation Delay Time (G1 - Y) tPLH tPHL Propagation Delay Time (G2 - Y) tPLH tPHL Propagation Delay Time (GL - Y) tW(L) Minimum Pulse Width (GL) Minimum Set-up Time (A, B, C - GL) Minimum Hold Time (A, B, C - GL) ns ns ns ns ns ts ns th ns CAPACITIVE CHARACTERISTICS Test Condition Symbol Parameter VCC (V) 5.0 5.0 TA = 25C Min. Typ. 5 52 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. 5/10 M54HC237 TEST CIRCUIT CL = 50pF or equivalent (includes jig and probe capacitance) RT = ZOUT of pulse generator (typically 50) WAVEFORM 1: PROPAGATION DELAY TIME (f=1MHz; 50% duty cycle) 6/10 M54HC237 WAVEFORM 2: SETUP AND HOLD TIME, MINIMUM PULSE WIDTH (GL)(f=1MHz; 50% duty cycle) 7/10 M54HC237 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 M54HC237 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 M54HC237 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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