74HC(T)257: 四路2输入多路复用器;3态

74HC257;74HCT257是高速硅栅CMOS器件,与低功耗肖特基TTL (LSTTL)针脚兼容。

74HC257和74HCT257具有四个相同的2输入多路复用器,带3态输出,其从两个数据源选择4位数据且受公共数据选择输入控制。

输入S为低电平时选中的是来自数据源0(1I0至4I0)的数据输入,S为高电平时选中的是数据源1(1I1至4I1)的数据输入。来自所选输入的数据以真正(非反相)形式出现在输出(1Y至4Y)处。

74HC257和74HCT257是4极2位置开关的逻辑实施,其中开关位置由施加到S的逻辑电平确定。OE为高电平时,输出被强制为高阻抗关断状态。

输出的逻辑方程式为:

1Y = OE • (1I1 • S • 1I0 •S)

2Y = OE • (2I1 • S • 2I0 •S)

3Y = OE • (3I1 • S • 3I0 •S)

4Y = OE • (4I1 • S • 4I0 •S)

除其非反相(真正)输出外,74HC257;74HCT257等同于74HC258。

74HC_T_257: 产品结构框图
sot109-1_3d
数据手册 (1)
名称/描述Modified Date
Quad 2-input multiplexer; 3-state (REV 7.0) PDF (165.0 kB) 74HC_HCT257 [English]02 Feb 2016
应用说明 (2)
名称/描述Modified Date
Live Insertion Aspects of Philips Logic Families (REV 1.0) PDF (73.0 kB) AN252 [English]13 Mar 2013
Pin FMEA 74HC/74HCT family (REV 1.0) PDF (51.0 kB) AN11044 [English]16 Mar 2011
用户指南 (1)
名称/描述Modified Date
HC/T User Guide (REV 1.0) PDF (508.0 kB) HCT_USER_GUIDE [English]01 Nov 1997
选型工具指南 (2)
名称/描述Modified Date
ロジック製品セレクションガイド... (REV 1.0) PDF (38.3 MB) LOGIC_SELECTION_GUIDE_2015_JP [English]19 Nov 2015
Logic selection guide 2016 (REV 1.1) PDF (15.3 MB) 75017285 [English]08 Jan 2015
封装信息 (3)
名称/描述Modified Date
plastic small outline package; 16 leads; body width 3.9 mm (REV 1.0) PDF (192.0 kB) SOT109-1 [English]08 Feb 2016
plastic shrink small outline package; 16 leads; body width 5.3 mm (REV 1.0) PDF (306.0 kB) SOT338-1 [English]08 Feb 2016
plastic thin shrink small outline package; 16 leads; body width 4.4 mm (REV 1.0) PDF (300.0 kB) SOT403-1 [English]08 Feb 2016
包装 (2)
名称/描述Modified Date
SO16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering... (REV 4.0) PDF (210.0 kB) SOT109-1_118 [English]24 Apr 2013
TSSOP16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... (REV 1.0) PDF (218.0 kB) SOT403-1_118 [English]08 Apr 2013
支持信息 (4)
名称/描述Modified Date
Footprint for reflow soldering (REV 1.0) PDF (9.0 kB) SO-SOJ-REFLOW [English]08 Oct 2009
Footprint for wave soldering (REV 1.0) PDF (8.0 kB) SO-SOJ-WAVE [English]08 Oct 2009
Footprint for reflow soldering (REV 1.0) PDF (16.0 kB) SSOP-TSSOP-VSO-REFLOW [English]08 Oct 2009
Footprint for wave soldering (REV 1.0) PDF (16.0 kB) SSOP-TSSOP-VSO-WAVE [English]08 Oct 2009
订购信息
型号状态
74HCT257DBActive
74HC257DBActive
74HC257PWActive
74HCT257PWActive
74HC257DActive
74HCT257DActive
封装环保信息
产品编号封装说明Outline Version回流/波峰焊接包装产品状态部件编号订购码 (12NC)Marking化学成分RoHS / 无铅 / RHF无铅转换日期EFRIFR(FIT)MTBF(小时)MSLMSL LF
74HCT257DSOT109-1SO-SOJ-REFLOW SO-SOJ-WAVE
SO-SOJ-REFLOW SO-SOJ-WAVE
Reel 13" Q1/T1 CECCActive74HCT257D,653 (9337 136 50653)74HCT257D74HCT257Dweek 35, 200484.96.621.51E811
Bulk Pack, CECCActive74HCT257D,652 (9337 136 50652)74HCT257D74HCT257Dweek 35, 200484.96.621.51E811
74HCT257D/AUSOT109-1SO-SOJ-REFLOW SO-SOJ-WAVE
SO-SOJ-REFLOW SO-SOJ-WAVE
Reel 13" Q1/T1Active74HCT257D/AUJ (9353 012 66118)74HCT257D74HCT257D/AUAlways Pb-free84.96.621.51E811
74HCT257D/S71SOT109-1SO-SOJ-REFLOW SO-SOJ-WAVE
SO-SOJ-REFLOW SO-SOJ-WAVE
Reel 13" Q1/T1Withdrawn74HCT257D/S71,118 (9350 667 50118)Standard Markingweek 47, 200584.96.621.51E811
74HC257DBSOT338-1SSOP-TSSOP-VSO-REFLOW SSOP-TSSOP-VSO-WAVE
SSOP-TSSOP-VSO-REFLOW SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1Active74HC257DB,118 (9351 886 60118)HC25774HC257DBweek 12, 200584.96.621.51E811
Bulk PackActive74HC257DB,112 (9351 886 60112)HC25774HC257DBweek 12, 200584.96.621.51E811
74HCT257PWSOT403-1SSOP-TSSOP-VSO-WAVEReel 13" Q1/T1Active74HCT257PW,118 (9351 884 00118)HCT25774HCT257PWweek 10, 200584.96.621.51E811
Bulk PackActive74HCT257PW,112 (9351 884 00112)HCT25774HCT257PWweek 10, 200584.96.621.51E811
74HC257DSOT109-1SO-SOJ-REFLOW SO-SOJ-WAVE
SO-SOJ-REFLOW SO-SOJ-WAVE
Reel 13" Q1/T1 CECCActive74HC257D,653 (9337 136 40653)74HC257D74HC257Dweek 12, 200584.96.621.51E811
Bulk Pack, CECCActive74HC257D,652 (9337 136 40652)74HC257D74HC257Dweek 12, 200584.96.621.51E811
74HCT257DBSOT338-1SSOP-TSSOP-VSO-REFLOW SSOP-TSSOP-VSO-WAVE
SSOP-TSSOP-VSO-REFLOW SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1Active74HCT257DB,118 (9351 909 60118)HCT25774HCT257DBweek 12, 200584.96.621.51E811
Bulk PackActive74HCT257DB,112 (9351 909 60112)HCT25774HCT257DBweek 12, 200584.96.621.51E811
74HC257PWSOT403-1SSOP-TSSOP-VSO-WAVEReel 13" Q1/T1Active74HC257PW,118 (9351 746 80118)HC25774HC257PWweek 10, 200584.96.621.51E811
Bulk PackActive74HC257PW,112 (9351 746 80112)HC25774HC257PWweek 10, 200584.96.621.51E811
Quad 2-input multiplexer; 3-state 74HCT257PW
Live Insertion Aspects of Philips Logic Families 74HC_T_245_Q100
Pin FMEA 74HC/74HCT family 74HC_T_597_Q100
HC/T User Guide 74HCU04PW
ロジック製品セレクションガイド... 74LVC_H_245A_Q100
Logic selection guide 2016 74LVC_H_245A_Q100
SO16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering... NPIC6C596A_Q100
plastic small outline package; 16 leads; body width 3.9 mm NPIC6C596A_Q100
Footprint for reflow soldering NPIC6C596A_Q100
Footprint for wave soldering NPIC6C596A_Q100
plastic shrink small outline package; 16 leads; body width 5.3 mm 74HC_T_595_Q100
Footprint for reflow soldering 74HC_T_595_Q100
SOT403-1 LPC812M101JDH16
SSOP-TSSOP-VSO-WAVE LPC1114FDH28
Reel 13" Q1/T1 LPC812M101JDH16
74HC_T_257
SA614A
HEF4094B
PCA9633