Other Parts Discussed in Thread: TMUX1072
My automotive customer has a requirement of Mux having following features:
1. No of channels- 8:1/16:1
2. Vcc/Logic supply available for MUX : 5 (+/-0.5) V
3. MCU logic available: CMOS
4. All channels should have internal clamping diode protection, as all the channels have to handle voltage greater than the Vcc (5V) from 0 to 22V during normal operation. Customer can provide a 47K series resistor to limit the current through the internal clamping diodes.
5. This clamping current injected into the disabled channels should not affect the ICs functionality/performance.
6. Also the enabled channel also will have input voltage greater than 5V Vcc (0 to 22 V).
Could you please confirm if SN74HC4851 (which has injection current effect control) is right fit here or suggest appropriate Mux ?
Per SN74HC4851 datasheet, note 1 on page 3 for abs max input voltage range VI says "The input and output voltage ratings may be exceeded if the input and output current ratings are observed." - does this mean it can take 22V.
Do you see any challenge implementing this spec?