Features
• 200 V peak-to-peak input and output signal
• Three different operating ranges:
– From -100 V to +100 V
– From 0 V to 200 V
– From -200 V to 0 V
• Very fast input slew rate (40 V/ns without load)
• Only +3.3 V low voltage supply
• Rail-to-rail input signal
• Low on-resistance
• Very low cross-talk between channels
• Low parasitic capacitance
• 42 kΩ bleed resistor on the outputs
• Thermal and undervoltage protection
• Latch-up free
• Control through serial interface
• 20 MHz data shift clock frequency
• Cascadable serial register with latches

Description
The STHV64SW is an integrated circuit which features 64 independent switches. It is
designed for medical ultrasound applications, but can also be used for driving
piezoelectric, capacitive or MEMS transducers, and in industrial application such as
generic high voltage switches.
The STHV64SW comprises a shift register for serial communication, self-biased high
voltage MOSFET gate drivers, high power N-channel MOSFETs, bleed resistance for
each switch, thermal sensor and undervoltage lockout. Moreover, the STHV64SW
includes self-biasing and thermal shutdown blocks. The switches are capable of
providing up to ±3 A peak output current.

Applications
• Medical ultrasound imaging
• NDT ultrasound transmission
• Piezoelectric transducer drivers
• Industrial