M54HC237 RAD-HARD 3 TO 8 LINE DECODER LATCH ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ HIGH SPEED: tPD = 16ns (TYP.) at VCC = 6V LOW POWER DISSIPATION: ICC = 4µA(MAX.) at TA=25°C 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 DESCRIPTION The M54HC237 is an high speed CMOS 3 TO 8 LINE DECODER fabricated with silicon gate C2MOS technology. DILC-16 FPC-16 ORDER CODES PACKAGE FM EM DILC FPC M54HC237D M54HC237K M54HC237D1 M54HC237K1 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° SYMBOL NAME AND FUNCTION 1, 2, 3 4 5 A, B, C GL G2 6 G1 15, 14, 13, 12, 11, 10, 9, 7 8 16 Y0 to Y7 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 SELECT GL G2 G1 C B A Y0 X X L L L L L L L L H X H L L L L L L L L L L X H H H H H H H H H X X L L L L H H H H X X X L L H H L L H H X X X L H L H L H L H X L L H L L L L L L L X : Don’t Care 2/10 Y1 Y2 Y3 Y4 Y5 Y6 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 Y7 L L L L L L L L L H M54HC237 LOGIC DIAGRAM This logic diagram has not be used to estimate propagation delays ABSOLUTE MAXIMUM RATINGS Symbol VCC Parameter Supply Voltage VI DC Input Voltage VO DC Output Voltage Value Unit -0.5 to +7 V -0.5 to VCC + 0.5 -0.5 to VCC + 0.5 V V IIK DC Input Diode Current ± 20 mA IOK DC Output Diode Current ± 20 mA IO DC Output Current ± 25 mA ± 50 mA ICC or IGND DC VCC or Ground Current Power Dissipation PD Tstg Storage Temperature TL Lead Temperature (10 sec) 300 mW -65 to +150 °C 265 °C 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 Parameter Supply Voltage VI Input Voltage VO Output Voltage Top Operating Temperature Input Rise and Fall Time tr, tf Value Unit 2 to 6 V 0 to VCC V 0 to VCC V -55 to 125 °C VCC = 2.0V 0 to 1000 ns VCC = 4.5V 0 to 500 ns VCC = 6.0V 0 to 400 ns 3/10 M54HC237 DC SPECIFICATIONS Test Condition Symbol VIH VIL VOH VOL II ICC 4/10 Parameter High Level Input Voltage Low Level Input Voltage High Level Output Voltage Low Level Output Voltage Input Leakage Current Quiescent Supply Current Value TA = 25°C VCC (V) Min. 2.0 4.5 6.0 2.0 4.5 6.0 Typ. Max. 1.5 3.15 4.2 -40 to 85°C -55 to 125°C Min. Min. Max. 1.5 3.15 4.2 0.5 1.35 1.8 Max. 1.5 3.15 4.2 0.5 1.35 1.8 V 0.5 1.35 1.8 2.0 IO=-20 µA 1.9 2.0 1.9 1.9 4.5 IO=-20 µA 4.4 4.5 4.4 4.4 Unit V 6.0 IO=-20 µA 5.9 6.0 5.9 5.9 4.5 IO=-4.0 mA 4.18 4.31 4.13 4.10 6.0 IO=-5.2 mA 5.68 2.0 IO=20 µA 0.0 0.1 0.1 0.1 4.5 IO=20 µA 0.0 0.1 0.1 0.1 6.0 IO=20 µA 0.0 0.1 0.1 0.1 4.5 IO=4.0 mA 0.17 0.26 0.33 0.40 6.0 IO=5.2 mA 0.18 0.26 0.33 0.40 6.0 VI = VCC or GND ± 0.1 ±1 ±1 µA 6.0 VI = VCC or GND 4 40 80 µA 5.8 5.63 V 5.60 V M54HC237 AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6ns) Test Condition Symbol Parameter 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) ts th Minimum Pulse Width (GL) Minimum Set-up Time (A, B, C - GL) Minimum Hold Time (A, B, C - GL) Value TA = 25°C VCC (V) Min. 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 Typ. Max. 30 8 7 60 19 16 45 15 13 45 15 13 65 21 18 10 6 6 12 3 2 75 15 13 180 36 31 140 28 24 140 28 24 190 38 32 75 15 13 50 10 9 25 5 5 -40 to 85°C -55 to 125°C Min. 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 Unit 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 ns ns ns ns ns ns ns CAPACITIVE CHARACTERISTICS Test Condition Symbol Parameter VCC (V) Value TA = 25°C Min. Typ. Max. 10 CIN Input Capacitance 5.0 5 CPD Power Dissipation Capacitance (note 1) 5.0 52 -40 to 85°C -55 to 125°C Min. Min. Max. 10 Unit Max. 10 pF pF 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 50Ω) 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. inch DIM. MIN. TYP MAX. MIN. TYP. MAX. A 2.1 2.71 0.083 0.107 a1 3.00 3.70 0.118 0.146 a2 0.63 1.14 0.025 B 1.82 2.39 0.072 b 0.40 0.45 0.50 0.016 0.018 0.020 b1 0.20 0.254 0.30 0.008 0.010 0.012 D 20.06 20.32 20.58 0.790 0.800 0.810 e 7.36 7.62 7.87 0.290 0.300 0.310 e1 0.88 2.54 0.035 0.045 0.094 0.100 e2 17.65 17.78 17.90 0.695 0.700 0.705 e3 7.62 7.87 8.12 0.300 0.310 0.320 F 7.29 7.49 7.70 0.287 0.295 0.303 I 3.83 0.151 K 10.90 12.1 0.429 0.476 L 1.14 1.5 0.045 0.059 0056437F 8/10 M54HC237 FPC-16 MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. MIN. TYP. MAX. A 6.75 6.91 7.06 0.266 0.272 0.278 B 9.76 9.94 10.14 0.384 0.392 0.399 C 1.49 1.95 0.059 D 0.102 0.127 0.152 0.004 0.005 0.006 E 8.76 8.89 9.01 0.345 0.350 0.355 F 0.077 1.27 G 0.38 H 6.0 L 18.75 M 0.33 0.050 0.43 0.48 0.015 0.017 0.019 0.237 0.38 N 22.0 0.738 0.43 0.013 0.867 0.015 4.31 0.017 0.170 G F D H 9 16 A N L 8 1 H E B M C 0016030E 9/10 M54HC237 Information furnished is believed to be accurate and reliable. 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