MIC59P50_15 Datasheet, PDF (1/12 Pages) Micrel Semiconductor – 8-Bit Parallel-Input Protected Latched Driver

MIC59P50
8-Bit Parallel-Input Protected
Latched Driver
General Description
The MIC59P50 parallel-input latched driver is a high-
voltage (80V), high-current (500mA) integrated circuit
comprised of eight CMOS data latches, a bipolar
Darlington transistor driver for each latch, and CMOS
control circuitry for the common CLEAR, STROBE, and
OUTPUT ENABLE functions. Similar to the MIC5801,
additional protection circuitry supplied on this device
includes thermal shutdown, undervoltage lockout (UVLO),
and overcurrent shutdown.
The bipolar/MOS combination provides an extremely low-
power latch with maximum interface flexibility. The
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_EE (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 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_DD is cycled or the /ENABLE/RESET pin is pulsed
high. Current pulses less than 2µs will not activate
overcurrent shutdown. Temperatures above +165°C will
shut down the device and activate the open-collector
FLAG output at pin 1. The UVLO circuit disables the
outputs at low V_DD; hysteresis of 0.5V is provided.
Datasheets and support documentation are available on
Micrel’s website at: www.micrel.com.
Features
• 4.4MHz minimum data input rate
• High-voltage, high-current outputs
• Per-output overcurrent shutdown (500mA typical)
• Undervoltage lockout
• Output fault flag
• Output transient protection diodes
• CMOS, PMOS, NMOS, and TTL-compatible inputs
• Internal pull-down resistors
• Low-power CMOS latches
• Single or split supply operation
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
July 29, 2015
Revision 2.0