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数字多路复用器和编码器

SN74LS253

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具有三态输出的双路 4 线至 1 线数据选择器/多路复用器

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SN74LS253

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产品详情

Technology family LS Function Digital Multiplexer Configuration 4:1 Number of channels 2 Operating temperature range (°C) 0 to 70 Rating Catalog
Technology family LS Function Digital Multiplexer Configuration 4:1 Number of channels 2 Operating temperature range (°C) 0 to 70 Rating Catalog
SOIC (D) 16 59.4 mm² (9.9 mm × 6 mm) PDIP (N) 16 181.42 mm² (19.3 mm × 9.4 mm)
  • Three-State Version of SN54/74LS153, SN54/74S153
  • Schottky-Diode-Clamped Transistors
  • Permits Multiplexing from N Lines to 1 Line
  • Performs Parallel-to Serial Conversion
  • Fully Compatible with Most TTL Circuits
  • Low Power Dissipation
    • 'LS253 … 35 mW Typical
    • 'S253 … 225 mW Typical

 
  • Three-State Version of SN54/74LS153, SN54/74S153
  • Schottky-Diode-Clamped Transistors
  • Permits Multiplexing from N Lines to 1 Line
  • Performs Parallel-to Serial Conversion
  • Fully Compatible with Most TTL Circuits
  • Low Power Dissipation
    • 'LS253 … 35 mW Typical
    • 'S253 … 225 mW Typical

 

Each of these Schottky-clamped data selectors/multiplexers contains inverters and drivers to supply fully complementary, on-chip, binary decoding data selection to the AND-OR gates. Separate output control inputs are provided for each of the two four-line sections.

The three-state outputs can interface with and drive data lines of bus-organized systems. With all but one of the common outputs disabled (at a high-impedance state) the low-impedance of the single enabled output will drive the bus line to a high or low logic level.

 

Each of these Schottky-clamped data selectors/multiplexers contains inverters and drivers to supply fully complementary, on-chip, binary decoding data selection to the AND-OR gates. Separate output control inputs are provided for each of the two four-line sections.

The three-state outputs can interface with and drive data lines of bus-organized systems. With all but one of the common outputs disabled (at a high-impedance state) the low-impedance of the single enabled output will drive the bus line to a high or low logic level.

 
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SN74HC253 正在供货 具有三态输出的双路 4 线至 1 线数据选择器/多路复用器 Voltage range 2V to 6V, average propagation delay 20ns, average drive strength 8mA

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* 数据表 Dual 4-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs 数据表 1988-3-1

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