TechBlog

HEXADECIMAL DISPLAY

Features

1. Separate LED and Logic Power Supplies May Be Used.
2. Internal TTL MSI Chip With Latch, Decoder, and Driver.
3. Constant-Current Drive for Hexadecimal Characters.
4. Operates from 5-V Supply.
5. RoHS Compliant.

Description

This hexadecimal display contains a four-bit latch, decoder, driver, and 4 × 7 light-emitting-diode (LED) character with two externally-driven decimal points in a 14-pin package. The LED driver outputs are designed to maintain a relatively constant on-level current of approximately 5 mA through each LED that forms the hexadecimal character. This current is virtually independent of the LED supply voltage within the recommended operating conditions. The decimal point anodes are connected to the LED supply; the cathodes are connected to external pins.