M74HC154 4 TO 16 LINE DECODER/DEMULTIPLEXER .. . . . . . . . HIGH SPEED tPD = 15 ns (TYP.) at VCC = 5 V LOW POWER DISSIPATION ICC = 4 µA (MAX.) at TA = 25 °C HIGH NOISE IMMUNITY VNIH = VNIL = 28 % VCC (MIN.) OUTPUT DRIVE CAPABILITY 15 LSTTL LOADS SYMMETRICAL OUTPUT IMPEDANCE IOH = IOL = 4 mA (MIN.) BALANCED PROPAGATION DELAYS tPLH = tPHL WIDE OPERATING VOLTAGE RANGE VCC (OPR) = 2 V to 6 V PIN AND FUNCTION COMPATIBLE WITH 54/74LS154 B1R (Plastic Package) M1R (Micro Package) ORDER CODES : M74HC154B1R M74HC154M1R PIN CONNECTIONS (top view) DESCRIPTION The 74HC154 is a high speed CMOS 4 TO 16-LINE DECODER/DEMULTIPLEXER fabricated in silicon 2 gate C MOS technology. It has the same high speed performance of LSTTL combined with true CMOS low power consumption. A binary code applied to the four inputs (A to D) provides a low level at the selected one of sixteen outputs excluding the other fifteen outputs, when both the strobe inputs, G1 and G2, are held low. When either strobe input is held high, the decording function is inhibited to keep all outputs high. The strobe function makes it easy to expand the decoding lines through cascading, and simplifies the design of address decoding circuits in memory control systems. All inputs are equipped with protection circuits against static discharge and transient excess voltage. October 1993 NC = No Internal Connection 1/8 M74HC154 TRUTH TABLE INPUTS G1 L L L L L L L L L L L L L L L L X H G2 L L L L L L L L L L L L L L L L H X X: Don’t Care LOGIC DIAGRAM 2/8 D L L L L L L L L H H H H H H H H X X C L L L L H H H H L L L L H H H H X X B L L H H L L H H L L H H L L H H X X A L H L H L H L H L H L H L H L H X X SELECTED OUTPUT (L) Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 Y9 Y10 Y11 Y12 Y13 Y14 Y15 NONE NONE M74HC154 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No SYMBOL NAME AND FUNCTION 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17 Y0 to Y15 Outputs (Active LOW) 18, 19 G1, G2 Enable Inputs (Active LOW) 23, 22, 21, 20 12 A to D GND Address Inputs Ground (0V) 24 VCC Positive Supply Voltage IEC LOGIC SYMBOLS ABSOLUTE MAXIMUM RATINGS Symbol ICC Value Unit VCC VI Supply Voltage DC Input Voltage Parameter -0.5 to +7 -0.5 to VCC + 0.5 V V VO DC Output Voltage -0.5 to VCC + 0.5 V IIK DC Input Diode Current ± 20 mA IOK DC Output Diode Current ± 20 mA IO or IGND DC Output Source Sink Current Per Output Pin DC VCC or Ground Current ± 25 ± 50 mA mA PD Power Dissipation 500 (*) mW Tstg TL Storage Temperature Lead Temperature (10 sec) -65 to +150 300 o o C C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition isnotimplied. (*) 500 mW: ≅ 65 oC derate to 300 mW by 10mW/oC: 65 oC to 85 oC 3/8 M74HC154 RECOMMENDED OPERATING CONDITIONS Symbol Parameter VCC VI Supply Voltage Input Voltage VO Output Voltage Top tr, tf Operating Temperature: Input Rise and Fall Time Value Unit 2 to 6 0 to VCC V V 0 to VCC V o -40 to +85 0 to 1000 VCC = 2 V VCC = 4.5 V 0 to 500 VCC = 6 V 0 to 400 C ns DC SPECIFICATIONS Test Conditions Symbol VIH V IL V OH Parameter High Level Input Voltage 2.0 Min. 1.5 4.5 6.0 3.15 4.2 Min. 1.5 V 3.15 4.2 0.5 0.5 1.35 1.8 1.35 1.8 High Level Output Voltage 2.0 Low Level Output Voltage 6.0 2.0 VI = IO=-20 µA VIH or V IL IO=-4.0 mA IO=-5.2 mA Unit Max. 4.5 6.0 6.0 4.5 4/8 Max. 2.0 4.5 ICC Typ. Low Level Input Voltage 4.5 II -40 to 85 oC TA = 25 C VCC (V) 4.5 6.0 VOL Value o 1.9 2.0 1.9 4.4 5.9 4.5 6.0 4.4 5.9 4.18 4.31 4.13 5.68 5.8 0.0 0.1 0.1 V V 5.63 VI = IO= 20 µA VIH or V IL IO= 4.0 mA 0.0 0.1 0.1 0.0 0.17 0.1 0.26 0.1 0.33 0.18 V 6.0 IO= 5.2 mA 0.26 0.33 Input Leakage Current 6.0 VI = VCC or GND ±0.1 ±1 µA Quiescent Supply Current 6.0 VI = VCC or GND 4 40 µA M74HC154 AC ELECTRICAL CHARACTERISTICS (C L = 50 pF, Input t r = tf = 6 ns) Symbol Parameter tTLH tTHL Output Transition Time tPLH tPHL Propagation Delay Time (A, B, C, D - Y) tPLH tPHL Propagation Delay Time (G1, G2 - Y) CIN CPD (*) Test Conditions VCC (V) 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 Input Capacitance Power Dissipation Capacitance Value TA = 25 oC -40 to 85 oC Min. Typ. Max. Min. Max. 30 75 95 8 15 19 7 13 16 65 175 220 19 35 44 16 30 37 55 160 200 17 32 40 15 27 34 5 10 10 57 Unit ns ns ns pF pF (*) 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 operting current can be obtained by the following equation. ICC(opr) = CPD •VCC •fIN + ICC SWITCHING CHARACTERISTICS TEST CIRCUIT TEST CIRCUIT ICC (Opr.) INPUT WAVEFORM IS THE SAME AS THAT IN CASE OF SWITCHING CHARACTERISTICSTEST. 5/8 M74HC154 Plastic DIP24 (0.25) MECHANICAL DATA mm DIM. MIN. TYP. inch MAX. MIN. TYP. a1 0.63 0.025 b 0.45 0.018 b1 0.23 b2 0.31 1.27 D E 0.009 0.012 0.050 32.2 15.2 16.68 1.268 0.598 0.657 e 2.54 0.100 e3 27.94 1.100 F MAX. 14.1 0.555 I 4.445 0.175 L 3.3 0.130 P043A 6/8 M74HC154 SO24 MECHANICAL DATA mm DIM. MIN. inch TYP. MAX. A a1 MIN. TYP. MAX. 2.65 0.10 0.104 0.20 a2 0.004 0.007 2.45 0.096 b 0.35 0.49 0.013 0.019 b1 0.23 0.32 0.009 0.012 C 0.50 0.020 c1 45° (typ.) D 15.20 15.60 0.598 0.614 E 10.00 10.65 0.393 0.420 e 1.27 0.05 e3 13.97 0.55 F 7.40 7.60 0.291 0.299 L 0.50 1.27 0.19 0.050 S 8° (max.) L s e3 b1 e a1 b A a2 C c1 E D 13 1 12 F 24 7/8 M74HC154 Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use ascritical components in life support devices or systems without express written approval of SGS-THOMSON Microelectonics. 1994 SGS-THOMSON Microelectronics - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A 8/8