IC 74HC238 Select One Of Eight Data Outputs Active Low for 138, Active High for 238 Thông số kĩ thuật : IC 74HC238 I/O Port or Memory Selector Three Enable Inputs to Simplify Cascading Typical Propagation Delay of 13ns at VCC = 5V, CL = 15pF, TA = 25°C Fanout (Over Temperature Range) Standard Outputs . . . . 10 LSTTL Loads Bus Driver Outputs . . . . 15 LSTTL Loads Wide Operating Temperature Range . . . –55°C to 125°C Balanced Propagation Delay and Transition Times Significant Power Reduction Compared to LSTTL Logic ICs HC Types 2V to 6V Operation High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V HCT Types 4.5V to 5.5V Operation Direct LSTTL Input Logic Compatibility, VIL = 0.8V (Max), VIH = 2V (Min) CMOS Input Compatibility, Il 1µA at VOL, VOH