DESCRIPTION
The M74HC258 is an inverting multiplexer. DIP SOP TSSOP ORDER CODES PACKAGE TUBE DIP SOP TSSO P M74HC258B1R M74HC258M1R T&R M74HC258RM13TR M74HC258TTR When the ENABLE INPUT (OE) is held ”High”, outputs of the IC become High-Impedance state. If SELECT INPUT is held ”LOW”, ”A” data is selected, when SELECT INPUT is High ”H”, ”B” data is chosen. All inputs are equipped with protection circuits against static discharge and transient excess voltage. PIN CONNECTION AND IEC LOGIC SYMBOLS August 2001 1/11 M74HC258 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
PIN No 1 2, 5, 14, 11 3, 6, 13, 10 4, 7, 12, 9 15 8 16 SYMBOL SELECT 1A to 4A 1B to 4B 1Y to 4Y OE GND Vcc NAME AND FUNCTION Common Data Select Input Data Input From Source A Data Input From Source B 3 State Multiplexer Outputs 3 State Output Enable Inputs (Active Low) Ground (0V) Positive Supply Voltage TRUTH TABLE OE H L L L L X : Don’t Care Z : High Impedance LOGIC DIAGRAM INPUTS SELECT A X X L L L H H X H X OUTPUT B...
STMicroelectronics
