器件名称:
M74HC154B1R
功能描述:
4 TO 16 LINE DECODER/DEMULTIPLEXER
文件大小:
170.75KB 共8页
简 介:
M74HC154 4 TO 16 LINE DECODER/DEMULTIPLEXER . . . . . . . . . HIGH SPEED tPD = 15 ns (TYP.) at VCC = 5 V LOW POWER DISSIPATION ICC = 4 A (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. NC = No Internal Connection October 1993 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 X: Don’t Care G2 L L L L L L L L L L L L ……
