AN-203 Datasheet
AN-203 Datasheet (Analog Devices)
Analog Devices
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AN-203 Datasheet (ZBasic)
ZBasic
suggests why devices are often labeled decoder/demultiplexer – depending on how you connect it, it can be used to perform either operation. The 74HC138 and 74HC139 are two examples of a decoder/demul.
a power of two. Examples of such a device are the 74HC151 (single 8 to 1), the 74HC153 (dual 4 to 1) and the 74HC157 (quad 2 to 1). Figure 1 shows how a ‘151 can be connected to a ZX-24. Figure 1 Multiplexing 8 Digital Inputs In this example, using the multiplexer allows up to eight inputs to be r.