7446 BCD-to-7-Segment Decoder/Driver IC

Description

• All circuit types feature lamp intensity modulation capability
• Open-collector outputs drive indicators directly
• Lamp-test provision
• Leading/trailing zero suppression

• The 7446 feature active-LOW outputs designed for driving common-anode LEDs or incandescent indicators directly.
• All of the circuits have full ripple-blanking input/output controls and a lamp test input.
• Segment identification and resultant displays are shown on a following page.
• Display patterns for BCD input counts above nine are unique symbols to authenticate input conditions.
• All of the circuits incorporate automatic leading and/or trailing-edge, zero-blanking control (RBI and RBO).
• Lamp test (LT) of these devices may be performed at any time when the BI/RBO node is at a HIGH logic level.
• All types contain an overriding blanking input (BI) which can be used to control the lamp intensity (by pulsing) or to inhibit the outputs.

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