ULN2003和ULN2004有哪些区别？The ULN2003A and ULQ2003A have a 2.7-kΩseries base resistor for each Darlington pair for operation directly with TTL or 5-V CMOS devices. TheULN2004A and ULQ2004A hav
lm324是美国national公司的产品,其pdf文件可以在这下载LM324 pdf文件.lm324英文描述:The LM124 series consists of four independent, high gain, internally frequency compensated operational amplifiers which w
