Product Summary

The MM74C911N display controller is an interface element with memory that drives a 4-digit, 8-segment LED display. The MM74C911N 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 MM74C911N’s can be cascaded to drive a 16-segment alpha-numeric display.

Parametrics

MM74C911N absolute maximum ratings: (1)Voltage at Any Pin except Inputs: -0.3V to VCC + 0.3V; (2)Voltage at Any Input except Digits: -0.3V to +15V; (3)Operating Temperature Range, (TA): -40℃ to +85℃; (4)Storage Temperature Range: -65℃ to +150℃; (5)Operating VCC Range: 3V to 6V; (6)Absolute Maximum VCC: 6.5V; (7)Lead Temperature (Soldering, 10 seconds): 260℃.

Features

MM74C911N features: (1)Direct segment drive (100 mA typ.) 3-STATE; (2)4 registers addressed like RAM; (3)Internal oscillator and scanning circuit; (4)Direct base drive to digit transistor; (5)Segment expandability without external components; (6)TTL compatible inputs; (7)Power saver mode-5 mW (typ.).

Diagrams

MM74C911N logic diagram

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