DESCRIPTION
Separate strobe inputs (1G, 2G) are provided for each of the two four-line sections. All inputs are equipped with protection circuits against static discharge and transient excess voltage. PIN CONNECTION AND IEC LOGIC SYMBOLS July 2001 1/11 M74HC253 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
PIN No 1, 15 14, 2 6, 5, 4, 3 7, 9 10, 11, 12, 13 8 16 SYMBOL NAME AND FUNCTION 1G, 2G A, B 1C0 to 1C3 1Y, 2Y 2C0 to 2C3 GND VCC Output Enable Inputs Common Data Select Inputs Data Inputs From Source 1 3 State Multiplexer Outputs Data Inputs From Source 2 Ground (0V) Positive Supply Voltage TRUTH TABLE SELECT INPUTS DATA INPUTS STROBE OUTPUT Y B A C0 C1 C2 C3 G X X X X X X H Z L L L X X X L L L L H X X X L H L H X L X X L L L H X H X X L H H L X X L X L L H L X X H X L H H H X X X L L L H H X X X H L H X : Don’t Care Z : High Impedance 2/11 LOGIC DIAGRAM M74HC253 This logic diagram has not be used to estimate propagation delays ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Un...
STMicroelectronics
