MIC58P42 8-Bit Serial-Input Protected Latched Driver General Description Features The MIC58P42 serial-input latched driver is a high-voltage 3.3 MHz Minimum Data-Input Rate (80V), high-current (500mA) integrated circuit comprised of CMOS, PMOS, NMOS, and TTL Compatible eight CMOS data latches, a bipolar Darlington transistor Internal Pull-Up/Pull-Down Resistors driver for each latch, and CMOS control circuitry for the Low Power CMOS Logic and Latches common STROBE, CLOCK, SERIAL DATA INPUT, and OUTPUT ENABLE functions. Similar to the MIC5842, High Voltage (80V) Current-Sink Outputs additional protection circuitry supplied on this device Output Transient-Protection Diodes includes thermal shutdown, under voltage lockout (UVLO), Single or Split Supply Operation and overcurrent shutdown. Thermal Shutdown The bipolar/CMOS combination provides an extremely Under-Voltage Lockout low-power latch with maximum interface flexibility. The Per-Output Over-Current Shutdown (500mA typical) MIC58P42 has open-collector outputs capable of sinking 500 mA and integral diodes for inductive load transient suppression with a minimum output breakdown voltage rating of 80V (50V sustaining). The drivers can be operated with a split supply, where the negative supply is down to 20V and may be paralleled for higher load current capability. With a 5V logic supply, the MIC58P42 will typically operate at better than 5MHz. With a 12V logic supply, significantly higher speeds are obtained. The CMOS inputs are compatible with standard CMOS, PMOS, and NMOS circuits. TTL circuits may require pull-up resistors. By using the serial data output, drivers may be cascaded for interface applications requiring additional drive lines. Each of these eight outputs has an independent over current shutdown of 500 mA. Upon over-current detection, the affected channel will turn OFF until VDD is cycled or the ENABLE/RESET pin is pulsed high. Current pulses less than 2 s will not activate current shutdown. Temperatures above 165 C will shut down the device. The UVLO circuit prevents operation at low VDD hysteresis of 0.5V is provided. See the MIC59P60 for a similar device that additionally provides an error flag output. Datasheets and support documentation are available on Micrels web site at: www.micrel.com. Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC58P42 Functional Diagram June 3, 2015 Revision 2.0 2