MIC59P50 8-Bit Parallel-Input Protected Latched Driver General Description Features The MIC59P50 parallel-input latched driver is a high- 4.4MHz minimum data input rate voltage (80V), high-current (500mA) integrated circuit High-voltage, high-current outputs comprised of eight CMOS data latches, a bipolar Per-output overcurrent shutdown (500mA typical) Darlington transistor driver for each latch, and CMOS Undervoltage lockout control circuitry for the common CLEAR, STROBE, and OUTPUT ENABLE functions. Similar to the MIC5801, Output fault flag additional protection circuitry supplied on this device Output transient protection diodes includes thermal shutdown, undervoltage lockout (UVLO), CMOS, PMOS, NMOS, and TTL-compatible inputs and overcurrent shutdown. Internal pull-down resistors The bipolar/MOS combination provides an extremely low- Low-power CMOS latches power latch with maximum interface flexibility. The Single or split supply operation MIC59P50 has open-collector outputs capable of sinking 500mA and integral diodes for inductive load transient suppression with a minimum output breakdown voltage rating of 80V above V (50V sustaining). The drivers can EE 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 MIC59P50 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. Each of these eight outputs has an independent overcurrent shutdown at 500mA. Upon current shutdown, the affected channel will turn OFF and the flag will go low until V is cycled or the /ENABLE/RESET pin is pulsed DD high. Current pulses less than 2s will not activate overcurrent shutdown. Temperatures above +165C will shut down the device and activate the open-collector FLAG output at pin 1. The UVLO circuit disables the outputs at low V hysteresis of 0.5V is provided. DD Datasheets and support documentation are available on Micrels website 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. MIC59P50 Functional Diagram July 29, 2015 2 Revision 2.0