High Current BCD-to-Seven Segment Decoder/Driver

The MC14547 BCD–to–seven segment decoder/driver is constructed with complementary MOS (CMOS) enhancement mode devices and NPN bipolar output drivers in a single monolithic structure. The circuit provides the functions of an 8421 BCD–to–seven segment decoder with high output drive capability. Blanking (BI), can be used to turn off or pulse modulate the brightness of the display. The MC14547 can drive seven–segment light–emitting diodes (LED), incandescent, fluorescent or gas discharge readouts either directly or indirectly.

Applications include instrument (e.g., counter, DVM, etc.) display driver, computer/calculator display driver, cockpit display driver, and various clock, watch, and timer uses.

• High Current Sourcing Outputs (Up to 65 mA)

• Low Logic Circuit Power Dissipation

• Supply Voltage Range = + 3.0 V to + 18 V

• Blanking Input

• Readout Blanking on All Illegal Combinations

• Lamp Intensity Modulation Capability

• Multiplexing Capability

• Capable of Driving Two Low–Power TTL Loads, One Low–Power

Schottky TTL Load or Two HTL Loads over the Rated Temperature

Range

• Use MC14511B for Applications Requiring Data Latches