M74HC257

M74HC257 QUAD 2 CHANNEL MULTIPLEXER (3-STATE) s HIGH SPEED : tPD = 11 ns (TYP.) at VCC = 6V s LOW POWER DISSIPATION: ICC =4µA(MAX.) at TA=25°C s HIGH NOISE IMMUNITY: )VNIH = VNIL = 28 % VCC (MIN.) t(ss SYMMETRICAL OUTPUT IMPEDANCE: c|IOH| = IOL = 6mA (MIN) us BALANCED PROPAGATION DELAYS: dtPLH ≅ tPHL ros WIDE OPERATING VOLTAGE RANGE: PVCC (OPR) = 2V to 6V s PIN AND FUNCTION COMPATIBLE WITH te74 SERIES 257 oleDESCRIPTION sThe M74HC257 is an high speed CMOS QUAD 2 bCHANNEL MULTIPLEXER (3-STATE) fabricated Owith silicon gate C2MOS technology. -This IC is composed of an independent 2-channel t(s)multiplexer with common SELECT and ENABLE (OE) input. cThe M74HC257 is a non-inverting multiplexer. DIP SOP TSSOP ORDER CODES PACKAGE TUBE DIP SOP TSSOP M74HC257B1R M74HC257M1R T&R M74HC257RM13TR M74HC257TTR When the ENABLE input is held "High", outputs of the IC become in a High-Impedance state. If SELECT input is held low, "A" data is selected, when SELECT is high , "B" data is chosen. All inputs are equipped with protection circuits against static discharge and transient excess voltage. Obsolete ProduPIN CONNECTION AND IEC LOGIC SYMBOLS August 2001 1/11 M74HC257 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No SYMBOL NAME AND FUNCTION 1 SELECT Common Data Select Input 2, 5, 14, 11 1A to 4A Data Input From Source A 3, 6, 13, 10 1B to 4B Data Input From Source B 4, 7, 12, 9 1Y to 4Y 3 State Multiplexer Outputs 15 OE 3 State Output Enable Input...