제품 상세 정보

Technology family HC Function Digital Multiplexer Configuration 2:1 Number of channels 4 Operating temperature range (°C) -55 to 125 Rating Catalog
Technology family HC Function Digital Multiplexer Configuration 2:1 Number of channels 4 Operating temperature range (°C) -55 to 125 Rating Catalog
PDIP (N) 16 181.42 mm² 19.3 x 9.4 SOIC (D) 16 59.4 mm² 9.9 x 6
  • 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.

다운로드 스크립트와 함께 비디오 보기 동영상

관심 가지실만한 유사 제품

open-in-new 대안 비교
비교 대상 장치와 동일한 기능을 지원하는 핀 대 핀
CD74AC257 활성 3상 출력을 지원하는 쿼드 2입력 비인버팅 멀티플렉서 Voltage range (2V to 6V), average drive strength (24mA), average propagation delay (7ns)
CD74HC157 활성 고속 CMOS 로직 쿼드 2입력 멀티플렉서 Voltage range (2V to 6V), average drive strength (8mA), average propagation delay (20ns)
다른 핀 출력을 지원하지만 비교 대상 장치와 동일한 기능
SN74HC257 활성 3상 출력을 지원하는 쿼드러플 2라인-1라인 데이터 선택기/멀티플렉서 Voltage range (2V to 6V), average drive strength (8mA), average propagation delay (20ns)

기술 자료

star =TI에서 선정한 이 제품의 인기 문서
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14개 모두 보기
유형 직함 날짜
* Data sheet CD54HC257, CD74HC257, CD54HCT257, CD74HCT257 datasheet (Rev. D) 2003/10/16
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 Input and Output Characteristics of Digital Integrated Circuits 1996/10/01
Application note Live Insertion 1996/10/01
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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평가 보드

14-24-LOGIC-EVM — 14핀~24핀 D, DB, DGV, DW, DYY, NS 및 PW 패키지용 로직 제품 일반 평가 모듈

14-24-LOGIC-EVM 평가 모듈(EVM)은 14핀~24핀 D, DW, DB, NS, PW, DYY 또는 DGV 패키지에 있는 모든 로직 장치를 지원하도록 설계되었습니다.

사용 설명서: PDF | HTML
TI.com에서 구매 불가
패키지 CAD 기호, 풋프린트 및 3D 모델
PDIP (N) 16 Ultra Librarian
SOIC (D) 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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