UCN5829

5829 SERIAL DATA OUT SERIAL DATA IN HIGH-SIDE DRIVER REFERENCE 9-BIT SERIAL-INPUT, LATCHED SINK DRIVER Intended primarily to drive high-current, dot matrix 9- and 24-wire printer solenoids, the UCN5829EB serial-input, latched sink driver provides a complete driver function with a minimum external parts count. Included on chip are constant-frequency PWM current control for each output driver, a user-defined output enable timeout, current sensing, and thermal shutdown. The 9-bit CMOS shift register and latches allow operation with most microprocessor/LSI-based systems. With a 5 V logic supply, these BiMOS devices will operate at data input rates greater than 3.3 MHz. The CMOS inputs cause minimum loading and are compatible with standard CMOS, PMOS, NMOS, and TTL circuits. A CMOS serial data output allows cascade connections in applications requiring additional drive lines as required for 24-wire printheads. The device features nine open-collector Darlington drivers, each rated at 50 V and 1.6 A. Current-control for each output is provided by an internal current-sensing resistor and a constant-frequency chopper circuit. An external high-side driver can be used to optimize print head performance. It is enabled by an on-chip driver during the output enable timeout. Internal logic sequencing prevents false output operation during power up. Other high-current devices for driving dot matrix printheads are the UDN2961B/W and UDN2962W. The UCN5829EB is supplied in a 44-lead power PLCC...