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| M54HCT138 RAD HARD 3 TO 8 LINE DECODER (INVERTING) s s s s s s s HIGH SPEED: tPD = 16ns (TYP.) at VCC = 4.5V LOW POWER DISSIPATION: ICC = 4A(MAX.) at TA=25C COMPATIBLE WITH TTL OUTPUTS: VIH = 2V (MIN.) VIL = 0.8V (MAX) SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 4mA (MIN) BALANCED PROPAGATION DELAYS: tPLH tPHL PIN AND FUNCTION COMPATIBLE WITH 54 SERIES 138 DEVICE FULLY COMPLIANT WITH SCC-9205-022 DILC-16 FPC-16 ORDER CODES PACKAGE DILC FPC FM M54HC138D M54HC138K EM M54HC138D1 M54HC138K1 DESCRIPTION The M54HCT138 is an high speed CMOS 3 TO 8 LINE DECODER fabricated with silicon gate C2MOS technology. If the device is enabled, 3 binary select inputs (A, B, and C) determine which one of the outputs will go low. If enable input G1 is held low or either G2A or G2B is held high, the decoding function is inhibited and all the 8 outputs go high. Three enable inputs are provided to ease cascade connection and application of address decoders for memory systems. All inputs are equipped with protection circuits against static discharge and transient excess voltage. PIN CONNECTION June 2004 Rev. 1 1/10 M54HCT138 Figure 1: IEC Logic Symbols Figure 2: Input And Output Equivalent Circuit Table 1: Pin Description PIN N 1, 2, 3 4, 5 6 9, 10, 11, 12, 13, 14, 15, 7 8 16 SYMBOL A, B, C G2A, G2B G1 Y0 to Y7 NAME AND FUNCTION Address Inputs Enable Inputs Enable Input Data Outputs GND VCC Ground (0V) Positive Supply Voltage Table 2: Truth Table INPUTS OUTPUTS ENABLE G2B X X H L L L L L L L L G2A X H X L L L L L L L L G1 L X X H H H H H H H H C X X X L L L L H H H H SELECT B X X X L L H H L L H H A X X X L H L H L H L H Y0 H H H L H H H H H H H Y1 H H H H L H H H H H H Y2 H H H H H L H H H H H Y3 H H H H H H L H H H H Y4 H H H H H H H L H H H Y5 H H H H H H H H L H H Y6 H H H H H H H H H L H Y7 H H H H H H H H H H L X : Don't Care 2/10 M54HCT138 Figure 3: Logic Diagram This logic diagram has not be used to estimate propagation delays Table 3: 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 Table 4: Recommended Operating Conditions Symbol VCC VI VO Top tr, tf Supply Voltage Input Voltage Output Voltage Operating Temperature Input Rise and Fall Time (VCC = 4.5 to 5.5V) Parameter Value 4.5 to 5.5 0 to VCC 0 to VCC -55 to 125 0 to 500 Unit V V V C ns 3/10 M54HCT138 Table 5: DC Specifications Test Condition Symbol Parameter VCC (V) 4.5 to 5.5 4.5 to 5.5 4.5 4.5 5.5 5.5 5.5 IO=-20 A IO=-4.0 mA IO=20 A IO=4.0 mA VI = VCC or GND VI = VCC or GND Per Input pin VI = 0.5V or VI = 2.4V Other Inputs at VCC or GND IO = 0 TA = 25C Min. 2.0 Typ. Max. Value -40 to 85C Min. 2.0 Max. -55 to 125C Min. 2.0 Max. V Unit VIH High Level Input Voltage Low Level Input Voltage High Level Output Voltage Low Level Output Voltage Input Leakage Current Quiescent Supply Current Additional Worst Case Supply Current VIL 0.8 4.4 4.18 4.5 4.31 0.0 0.17 0.1 0.26 0.1 4 2.0 4.4 4.13 0.8 4.4 4.10 0.1 0.33 1 40 2.9 0.8 V VOH VOL II ICC ICC V 0.1 0.40 1 80 3.0 V A A mA Table 6: AC Electrical Characteristics (CL = 50 pF, Input tr = tf = 6ns) Test Condition Symbol Parameter VCC (V) 4.5 4.5 4.5 4.5 TA = 25C Min. Typ. 8 17 16 19 Max. 15 30 30 30 Value -40 to 85C Min. Max. 19 38 38 38 -55 to 125C Min. Max. 22 45 45 45 ns ns ns 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) Table 7: Capacitive Characteristics Test Condition Symbol Parameter VCC (V) 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. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC 4/10 M54HCT138 Figure 4: Test Circuit CL = 50pF or equivalent (includes jig and probe capacitance) RT = ZOUT of pulse generator (typically 50) Figure 5: Waveform - Propagation Delays For Inverting Outputs (f=1MHz; 50% duty cycle) 5/10 M54HCT138 Figure 6: WAVEFORM - PROPAGATION DELAYS FOR NON-INVERTING OUTPUTS (f=1MHz; 50% duty cycle) 6/10 M54HCT138 DILC-16 MECHANICAL DATA mm. DIM. MIN. A a1 a2 B b b1 D E e e1 e2 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 7/10 M54HCT138 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 8/10 M54HCT138 Table 8: Revision History Date 16-Jun-2004 Revision 1 First Release Description of Changes 9/10 M54HCT138 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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