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Technology family HCT Function Digital Multiplexer Configuration 2:1 Number of channels 4 Operating temperature range (°C) -55 to 125 Rating Military
Technology family HCT Function Digital Multiplexer Configuration 2:1 Number of channels 4 Operating temperature range (°C) -55 to 125 Rating Military
CDIP (J) 16 135.3552 mm² 19.56 x 6.92
  • Buffered Inputs
  • Typical Propagation Delay (In to Output) = 12ns 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

Data sheet acquired from Harris Semiconductor

  • Buffered Inputs
  • Typical Propagation Delay (In to Output) = 12ns 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

Data sheet acquired from Harris Semiconductor

The ’HC257 and ’HCT257 are quad 2-input multiplexers which select four bits of data from two sources under the control of a common Select Input (S). The Output Enable input (OE\) is active LOW. When OE\ is HIGH, all of the outputs (1Y-4Y) are in the high impedance state regardless of all other input conditions.

Moving data from two groups of registers to four common output buses is a common use of the 257. The state of the Select input determines the particular register from which the data comes. It can also be used as a function generator.

The ’HC257 and ’HCT257 are quad 2-input multiplexers which select four bits of data from two sources under the control of a common Select Input (S). The Output Enable input (OE\) is active LOW. When OE\ is HIGH, all of the outputs (1Y-4Y) are in the high impedance state regardless of all other input conditions.

Moving data from two groups of registers to four common output buses is a common use of the 257. The state of the Select input determines the particular register from which the data comes. It can also be used as a function generator.

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기술 자료

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13개 모두 보기
유형 직함 날짜
* Data sheet CD54HC257, CD74HC257, CD54HCT257, CD74HCT257 datasheet (Rev. D) 2003/10/16
* SMD CD54HCT257 SMD 5962-89705 2016/06/21
Application note Implications of Slow or Floating CMOS Inputs (Rev. E) 2021/07/26
Selection guide Logic Guide (Rev. AB) 2017/06/12
Application note Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) 2015/12/02
User guide LOGIC Pocket Data Book (Rev. B) 2007/01/16
Application note Semiconductor Packing Material Electrostatic Discharge (ESD) Protection 2004/07/08
User guide Signal Switch Data Book (Rev. A) 2003/11/14
Application note TI IBIS File Creation, Validation, and Distribution Processes 2002/08/29
Application note CMOS Power Consumption and CPD Calculation (Rev. B) 1997/06/01
Application note Designing With Logic (Rev. C) 1997/06/01
Application note SN54/74HCT CMOS Logic Family Applications and Restrictions 1996/05/01
Application note Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc 1996/04/01

설계 및 개발

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패키지 CAD 기호, 풋프린트 및 3D 모델
CDIP (J) 16 Ultra Librarian

주문 및 품질

포함된 정보:
  • RoHS
  • REACH
  • 디바이스 마킹
  • 납 마감/볼 재질
  • MSL 등급/피크 리플로우
  • MTBF/FIT 예측
  • 물질 성분
  • 인증 요약
  • 지속적인 신뢰성 모니터링
포함된 정보:
  • 팹 위치
  • 조립 위치

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