MIC58P42_15 Datasheet, PDF (1/13 Pages) Micrel Semiconductor – 8-Bit Serial-Input Protected Latched Driver

MIC58P42
8-Bit Serial-Input Protected Latched Driver
General Description
The MIC58P42 serial-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 STROBE, CLOCK, SERIAL DATA INPUT, and
OUTPUT ENABLE functions. Similar to the MIC5842,
additional protection circuitry supplied on this device
includes thermal shutdown, under voltage lockout (UVLO),
and overcurrent shutdown.
The bipolar/CMOS combination provides an extremely
low-power latch with maximum interface flexibility. The
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 2µs 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
Micrel’s web site at: www.micrel.com.
Features
• 3.3 MHz Minimum Data-Input Rate
• CMOS, PMOS, NMOS, and TTL Compatible
• Internal Pull-Up/Pull-Down Resistors
• Low Power CMOS Logic and Latches
• High Voltage (80V) Current-Sink Outputs
• Output Transient-Protection Diodes
• Single or Split Supply Operation
• Thermal Shutdown
• Under-Voltage Lockout
• Per-Output Over-Current Shutdown (500mA typical)
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
June 3, 2015
Revision 2.0