HV2321 is a low charge injection, 8-channel, unipolar, negative high voltage, analog switch integrated circuit (IC) with bleed resistors. The device can be used in applications requiring high voltage switching controlled by low voltage signals, such as NDT metal flaw detection, medical ultrasound imaging, piezoelectric transducer drivers, and printers. The bleed resistors eliminate voltage built up on capacitive loads such as piezoelectric transducers. Data is input into an 8-bit shift register and then retained in an 8-bit latch. To reduce any possible clock feed-through noise, the latch enable bar should be left high until all bits are clocked in. Data is clocked in during the rising edge of the clock. Using HVCMOS technology, this device combines high voltage bilateral DMOS switches and low power CMOS logic to provide efficient control of high voltage analog signals.

• Low on-resistance, 14Ω max.
• Integrated bleed resistors on the outputs
• 3.3 or 5.0V CMOS input logic level
• 20MHz data shift clock frequency
• Very low quiescent power dissipation (-10µA)
• Low parasitic capacitance
• DC to 50MHz small signal frequency response
• -60dB typical off-isolation at 5.0MHz
• CMOS logic circuitry for low power
• Excellent noise immunity
• Cascadable serial data register with latches