U8C3005

Preliminary

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

6 of 6

www.unisonic.com.tw

QW-R126-059.c



CIRCUIT DESCRIPTION

The U8C3005 is a 8-Bit Serial-In Parallel-Out driver for Solenoid valve. When OE in the falling edge, the data of

shift registers are written to the latch registers. The state of outputs Drain0 ~ Drain7 are controlled by the latch data

Q20 ~ Q27 and OE signal. when OE is low, if a channel corresponding data latch is 1, then the channel output is

turned on, the switch from the output terminal to ground

in the on state, if a channel corresponding data latch is

0,the switch from the output terminal to ground

are turned off,

In a high impedance state. When OE is high, the

eight outputs are turned off, In a high impedance state.

U8C3005’s constant current technology make the maximum output current limited to around 50-85mA, which can

effectively prevent the chip or peripheral devices from damaging caused by load short.



OPEN/SHORT DETECTION

The result of open/short detection of U8C3005 could be retrieved from serial-out (SDO) data. Once the load of a

channel in Open state or short state , the chip can be detected in time and quickly Shutdown the load shorted

channel which the chip from can over heating and external load. The test results stored to the shift register when

OE rising edge. It Can be removed from SDO end of the serial at SCLK action reading back to the controller.

The controller will read back the data before sending out now Control data for comparison, if exactly the same, it

means the load in good condition, no open short circuit, if a bit of data sent out is 1, 0 read back ,it indicates that the

corresponding channel bit data load short circuit occurs, if a bit of data to send out is 0, 1 read back, the table Shows

the bit data corresponding to the channel occurred Open load.

UTC assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or

other parameters) listed in products specifications of any and all UTC products described or contained

herein. UTC products are not designed for use in life support appliances, devices or systems where

malfunction of these products can be reasonably expected to result in personal injury. Reproduction in

whole or in part is prohibited without the prior written consent of the copyright owner. The information

presented in this document does not form part of any quotation or contract, is believed to be accurate

and reliable and may be changed without notice.