Supertex inc.

Supertex inc.

1235 Bordeaux Drive, Sunnyvale, CA 94089

Tel: 408-222-8888

www.supertex.com

HV2321

Features

Applications

General Description

The Supertex 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.

Block Diagram

Low Charge Injection, 8-Channel, Unipolar,

Negative High Voltage, Analog Switch With Bleed Resistors

VNN VPP

LE CLR

VDD GND

RGND

CLK

DIN

DOUT

8-Bit

Shift

Register

SW0

SW1

SW2

SW6

SW7

Output

Switches

Level

Shifters

Latches

D

LE

CLR

D

LE

CLR

D

LE

CLR

D

LE

CLR

D

LE

CLR