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BUY HCF4019BE https://www.utsource.net/itm/p/958011.html
＂HEX ＂＂D＂＂ - TYPE FLIP-FLOP＂
Description: HCF4019BE is a dual 4-input NAND Schmitt trigger manufactured by STMicroelectronics. Features: Low power consumption High noise immunity High input impedance High speed Low input current Low output saturation voltage High input sensitivity Wide supply voltage range Applications: Digital logic gates Flip-flops Counters Data selectors Encoders Decoders Multiplexers Signal conditioning Pulse generation Timing circuits Oscillators (For reference only)