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7446A Datasheet

  • 7446A

  • BCD to 7-Segment Decoders/Drivers

  • 6頁(yè)

  • FAIRCHILD

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DM7446A, DM7447A BCD to 7-Segment Decoders/Drivers
September 1986
Revised February 2000
DM7446A, DM7447A
BCD to 7-Segment Decoders/Drivers
General Description
The DM7446A and DM7447A feature active-LOW outputs
designed for driving common-anode LEDs or incandescent
indicators directly. All of the circuits have full ripple-blank-
ing input/output controls and a lamp test input. Segment
identification and resultant displays are shown on a follow-
ing 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 trail-
ing-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 con-
trol the lamp intensity (by pulsing) or to inhibit the outputs.
Features
s
All circuit types feature lamp intensity modulation capa-
bility
s
Open-collector outputs drive indicators directly
s
Lamp-test provision
s
Leading/trailing zero suppression
Ordering Code:
Order Number
DM7446AN
DM7446AN
Package Number
N16E
N16E
Package Description
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Connection Diagram
漏 2000 Fairchild Semiconductor Corporation
DS006518
www.fairchildsemi.com

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