M74HC253 DUAL 4 CHANNEL MULTIPLEXER 3 STATE OUTPUT HIGH SPEED: t = 16ns (TYP.) at V = 6V PD CC LOW POWER DISSIPATION: I = 4A(MAX.) at T =25C CC A HIGH NOISE IMMUNITY: V = V = 28 % V (MIN.) NIH NIL CC DIP SOP TSSOP SYMMETRICAL OUTPUT IMPEDANCE: I = I = 4mA (MIN) OH OL BALANCED PROPAGATION DELAYS: t t PLH PHL ORDER CODES WIDE OPERATING VOLTAGE RANGE: PACKAGE TUBE T & R V (OPR) = 2V to 6V CC DIP M74HC253B1R PIN AND FUNCTION COMPATIBLE WITH SOP M74HC253M1R M74HC253RM13TR 74 SERIES 253 TSSOP M74HC253TTR DESCRIPTION The M74HC253 is an high speed CMOS DUAL 4 (nG) can be used to inhibit the data output the CHANNEL MULTIPLEXER fabricated with silicon output of M74HC253 is a high impedance while 2 gate C MOS technology. the strobe input is held high. Each of these data (1C0-1C3, 2C0-2C3) is All inputs are equipped with protection circuits selected by the two address inputs A and B. against static discharge and transient excess Separate strobe inputs (1G, 2G) are provided for voltage. each of the two four-line sections. The strobe input PIN CONNECTION AND IEC LOGIC SYMBOLS July 2001 1/11M74HC253 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No SYMBOL NAME AND FUNCTION 1, 15 1G, 2G Output Enable Inputs 14, 2 A, B Common Data Select Inputs 6, 5, 4, 3 1C0 to 1C3 Data Inputs From Source 1 7, 9 1Y, 2Y 3 State Multiplexer Outputs 10, 11, 12, 2C0 to 2C3 Data Inputs From 13 Source 2 8 GND Ground (0V) 16 V Positive Supply Voltage CC TRUTH TABLE SELECT INPUTS DATA INPUTS STROBE OUTPUT Y C C C C BA G 0 1 2 3 XXXXXX HZ LLL X X X LL L L H X X XLH LH X L X XL L L HXHX X L H H L X XLX L L HL X X H XLH H H XXX L L L H H XXX HL H X : Dont Care Z : High Impedance 2/11