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MC68332ACEH20

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File Size : 116 KB Manufacturer:FREESCALE Description:FUNCTIONAL DESCRIPTION The LS155 and LS156 are Dual 1-of-4 Decoder/Demulti- plexers with common Address inputs and separate gated Enable inputs. When enabled, each decoder section accepts the binary weighted Address inputs (A0, A1) and provides four mutually exclusive active LOW outputs (O0 C O3). If the Enable requirements of each decoder are not met, all outputs of that decoder are HIGH. Each decoder section has a 2-input enable gate. The enable gate for Decoder a requires one active HIGH input and one active LOW input (Ea•Ea). In demultiplexing applica- tions, Decoder a can accept either true or complemented data by using the Ea or Ea inputs respectively. The enable gate for Decoder b requires two active LOW inputs (Eb•Eb). The LS155 or LS156 can be used as a 1-of-8 Decoder/Demulti- plexer by tying Ea to Eb and relabeling the common connection as (A2). The other Eb and Ea are connected together to form the common enable. The LS155 and LS156 can be used to generate all four minterms of two variables. These four minterms are useful in some applications replacing multiple gate functions as shown in Fig. a. The LS156 has the further advantage of being able to

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型号：MC68332ACEH20 厂家：FREESCALE 封装：1400 批号：07+ 数量：PQFP132 说明：


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