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M74HC643B1R中文资料PDF规格书
M74HC643B1R规格书详情
DESCRIPTION
The M54/74HC245, HC640 and HC643 utilise silicon gate C2MOS technology to achive operating speeds equivalent to LSTTL devices.
Along with the low power dissipation and high noise immunity of standards C2MOS integrated circuit, it possesses the capability to drive 15 LSTTL loads.
These IC’s are intended for two-way asynchronous communication between data buses, and the direction of data trasmission is determined by DIR input. The enable input (G) can be used to disable the device so that the buses are effectively isolated.
All input are equipped with protection circuits against staticdischarge and transient discharge and transient excess voltage.
IT IS PROHIBITED TO APPLY A SIGNAL TO A BUS TERMINAL WHEN IT IS IN OUTPUT MODE AND WHEN A BUS THERMINAL IS FLOATING (HIGH IMPEDANCE STATE), IT IS REQUESTED TO FIX THE INPUT LEVEL BY MEANS OF EXTERNAL PULL DOWN OR PULL UP RESISTOR.
■ HIGH SPEED
tPD = 10 ns (TYP.) at VCC = 5V
■ LOW POWER DISSIPATION
ICC = 4 µA (MAX.) at TA = 25 oC
■ HIGH NOISE IMMUNITY
VNIH = VINL = 28 VCC (MIN.)
■ OUTPUT DRIVE CAPABILITY 15 LSTTL LOADS
■ SYMMETRICAL OUTPUT IMPEDANCE
|IOH| = IOL = 6 mA (MIN)
■ BALANCED PROPAGATION DELAYS tPLH = tPHL
■ WIDE OPERATING VOLTAGE RANGE
VCC (OPR) = 2 V TO 6 V
■ PIN AND FUNCTION COMPATIBLE WITH 54/74LS245/640/643
供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
---|---|---|---|---|---|---|---|
SGS |
23+ |
DIP |
89630 |
当天发货全新原装现货 |
询价 | ||
ST/意法 |
23+ |
NA/ |
765 |
优势代理渠道,原装正品,可全系列订货开增值税票 |
询价 | ||
ST/意法 |
22+ |
SOP-247.2MM |
3000 |
原装现货假一赔十 |
询价 | ||
ST |
DIP-20 |
93480 |
集团化配单-有更多数量-免费送样-原包装正品现货-正规 |
询价 | |||
ST/意法 |
2022 |
DIP-24 |
80000 |
原装现货,OEM渠道,欢迎咨询 |
询价 | ||
ST/意法 |
DIP-24 |
265209 |
假一罚十原包原标签常备现货! |
询价 | |||
ST/意法 |
22+ |
SOP-247.2MM |
9000 |
原装正品 |
询价 | ||
ST |
22+ |
SO-24 |
3200 |
十年品牌!原装现货!!! |
询价 | ||
ST/意法 |
21+ |
DIP-24 |
5000 |
原装现货/假一赔十/支持第三方检验 |
询价 | ||
ST |
2023+ |
DIP |
5800 |
进口原装,现货热卖 |
询价 |