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MM74C991 - 4-Digit Expandable Segment Display Controller

Download the MM74C991 datasheet PDF. This datasheet also covers the MM74C991N variant, as both devices belong to the same 4-digit expandable segment display controller family and are provided as variant models within a single manufacturer datasheet.

General Description

The MM74C911 display controller is an interface element with memory that drives a 4-digit, 8-segment LED display.

The MM74C911 allows individual control of any segment in the 4-digit display.

The number of segments per digit can be expanded without any external components.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (MM74C991N_FairchildSemiconductor.pdf) that lists specifications for multiple related part numbers.

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Other Datasheets by Fairchild (onsemi)

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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MM74C911 4-Digit Expandable Segment Display Controller October 1987 Revised January 1999 MM74C911 4-Digit Expandable Segment Display Controller General Description The MM74C911 display controller is an interface element with memory that drives a 4-digit, 8-segment LED display. The MM74C911 allows individual control of any segment in the 4-digit display. The number of segments per digit can be expanded without any external components. For example, two MM74C911’s can be cascaded to drive a 16-segment alpha-numeric display. The display controllers receive data information through 8 data lines a, b…DP, and digit information through 2 address inputs K1 and K2.