產品詳細資料

Technology family HC Function Digital Multiplexer Configuration 2:1 Number of channels 4 Operating temperature range (°C) -40 to 85 Rating Catalog
Technology family HC Function Digital Multiplexer Configuration 2:1 Number of channels 4 Operating temperature range (°C) -40 to 85 Rating Catalog
TSSOP (PW) 16 32 mm² (5 mm × 6.4 mm) SOIC (D) 16 59.4 mm² (9.9 mm × 6 mm) SOP (NS) 16 79.56 mm² (10.2 mm × 7.8 mm) PDIP (N) 16 181.42 mm² (19.3 mm × 9.4 mm)
  • Wide operating voltage range of 2 V to 6 V
  • High-current inverting outputs can drive up to 15 LSTTL loads
  • Low power consumption, 80-µA max ICC
  • ’HC257 typical tpd = 9 ns
  • ’HC258 typical tpd = 12 ns
  • ±6-mA output drive at 5 V
  • Low input current of 1 µA max
  • Provides bus interface from multiple sources in high-performance systems
  • Wide operating voltage range of 2 V to 6 V
  • High-current inverting outputs can drive up to 15 LSTTL loads
  • Low power consumption, 80-µA max ICC
  • ’HC257 typical tpd = 9 ns
  • ’HC258 typical tpd = 12 ns
  • ±6-mA output drive at 5 V
  • Low input current of 1 µA max
  • Provides bus interface from multiple sources in high-performance systems

The SNx4HC257 and ’258 contain four data selectors/ multiplexers to select one of two data sources. All channels are controlled by the same address select (A/B) input, and active-low strobe (G) input. A high level at the G terminal forces all outputs into the high-impedance state. The ’257 has non-inverted outputs and the ’258 has inverted outputs.

The SNx4HC257 and ’258 contain four data selectors/ multiplexers to select one of two data sources. All channels are controlled by the same address select (A/B) input, and active-low strobe (G) input. A high level at the G terminal forces all outputs into the high-impedance state. The ’257 has non-inverted outputs and the ’258 has inverted outputs.

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SN74LVC258A 現行 具有反向三態輸出的四路 2 線路至 1 線路資料選擇器和多工器 Voltage range 1.65V to 3.6V, average propagation delay 5.5ns, average drive strength 24mA
CD74AC257 現行 具有 3 態輸出的四路 2 輸入非反相多工器 Voltage range 2V to 6V, average propagation delay 7ns, average drive strength 24mA
功能相同,但針腳輸出與所比較的裝置不同。
SN74AHC257 現行 具有 3 態輸出的四路 2 線路至 1 線路資料選擇器/多工器 Voltage range 2V to 5.5V, average propagation delay 12ns, average drive strength 9mA

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* 資料表 SN54HC257, SN54HC258, SN74HC257, SN74HC258 datasheet (Rev. C) 1982/12/1

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