Description: The 4511 BCD-to-seven segment latch/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 a 4-bit storage latch, an 8421 BCD-to-seven segment decoder, and an output drive capability. Lamp test (LT), blanking (BI), and latch enable (LE) inputs are used to test the display, to turn-off or pulse modulate the brightness of the display, and to store a BCD code, respectively. It can be used with seven-segment light emitting diodes (LED), incandescent, fluorescent, gas discharge, or liquid crystal readouts either directly or indirectly.
Features:
• Low logic circuit power dissipation
• High current sourcing outputs (up to 25 mA)
• Latch storage of code
• Blanking input
• Lamp test provision
• Readout blanking on all illegal input combinations
• Lamp intensity modulation capability
• Time share (multiplexing) facility
• Equivalent to Motorola MC14511
