两组四输入与非门。 The 74HC20; 74HCT20 is a dual 4-input NAND gate. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.
8同相三态缓冲器驱动器。可用于增大驱动电流的情况，比如单片机输出驱动数码管电流不够，就可利用74HC244来驱动数码管，增加亮度。 The 74HC244; 74HCT244 is an 8-bit buffer/line driver with 3-state outputs. The device can be used as two 4-bit buffers or one 8-bit buffer. The device features two output enables (1OE
三态四总线缓冲门。 The 74HC125; 74HCT125 is a quad buffer/line driver with 3-state outputs controlled by the output enable inputs (nOE). A HIGH on nOE causes the outputs to assume a high impedance OFF-state. Inputs include clamp diodes. This enables the use
ABB AC31软件描述90系列pdf,Perform the following steps: 1. Connect the controller 07 KT 97 to 24 V DC (refer to volume 2 – Hardware 07 KT 97). 2. Connect COM1 of the controller 07 KT 97 to the serial interface of your PC. 3. Start the 907 AC 1131 software
ASCO两位两通电磁阀8210系列pdf,ASCO两位两通电磁阀8210系列：阀体材料：黄铜或不锈钢，接口：3/8"-21/2" NPT，大流量，适用于液体，腐蚀性介质，空气和惰性气体，工业应用：汽车清洗 洗涤设备工业用水控制空气压缩机泵SERIES
8210
AsG△
Specifications(Metric units)
Watt Rating/
Operating Pressure Differential(bar
Max. Fluid
Class of coil
Max ac
Max
ASCO两位两通电磁阀8262/8263系列pdf,ASCO两位两通电磁阀8262/8263系列：直动式通用电磁阀，阀体材料：黄铜或不锈钢，接口：1/8-3/8" NPT，高可靠，大流量，小型提升阀，关闭牢靠，弹性体材料可适用于不同应用，可任意位置安装，黄铜阀体适用于常规环境；不锈钢阀体适用于腐蚀性环境SERIES
8262
AsG△
8263
Specifications(Metric units
operating Pressure Differential (bar)
Max
Watt R
梅特勒托利多 变送器M300/M400/M420系列pdf,The M400 transmitter series features advanced ISM technology and covers pH /ORP, oxygen and conductivity measurements. Thanks to the mixed-mode input functionality, the M400 accepts any conventional (analog) or ISM senso
