MIC5891YWM Electronic IC Chips 8-Bit Serial-Input Latched Source Driver

MIC5891

8-Bit Serial-Input Latched Source Driver

General Description

The MIC5891 latched driver is a high-voltage, high current integrated circuit comprised of eight CMOS data latches, CMOS control circuitry for the common STROBE and OUTPUT ENABLE, and bipolar Darlington transistor drivers for each latch.

Bipolar/MOS construction provides extremely low power latches with maximum interface flexibility.

The MIC5891 will typically operate at 5MHz with a 5V logic supply.

The CMOS inputs are compatible with standard CMOS, PMOS, and NMOS logic levels. TTL circuits may be used with appropriate pull-up resistors to ensure a proper logichigh input.

A CMOS serial data output allows additional drivers to be cascaded when more than 8 bits are required.

The MIC5891 has open-emitter outputs with suppression diodes for protection against inductive load transients. The output transistors are capable of sourcing 500mA and will sustain at least 35V in the on-state.

Simultaneous operation of all drivers at maximum rated current requires a reduction in duty cycle due to package power limitations. Outputs may be paralleled for higher load current capability

The MIC5891 is available in a 16-pin plastic DIP package (N) and 16-pin wide SOIC package (WM).

Features

• High-voltage, high-current outputs

• Output transient protection diodes

• CMOS-, PMOS-, NMOS-, and TTL-compatible inputs

• 5MHz typical data input rate

• Low-power CMOS latches

Applications

• Alphanumeric and bar graph displays

• LED and incandescent displays

• Relay and solenoid drivers

• Other high-power loads

Functional Diagram

Absolute Maximum Ratings (Notes 1, 2, 3)

Output Voltage (V_OUT) .................................................50V

Logic Supply Voltage Range (V_DD) ................ 4.5V to 15V

Load Supply Voltage Range (V_BB) ................. 5.0V to 50V

Input Voltage Range (V_IN) ...................................–0.3V to V_DD+0.3V

Continuous Collector Current (I_C) ..........................500mA

Package Power Dissipation .............................. see graph

Operating Temperature Range (T_A) ....... –55°C to +125°C

Storage Temperature Range (T_S) .......... –65°C to +150°C

Note 1: T_A = 25°C

Note 2: Derate at the rate of 20mW/°C above T_A = 25°C.

Note 3: Micrel CMOS devices have input-static protection but are susceptible to damage when exposed to extremely high static electrical charges.

Pin Configuration

Typical Circuits

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