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DM7446A डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - BCD to 7-Segment Decoders/Drivers - Fairchild Semiconductor

भाग संख्या DM7446A
समारोह BCD to 7-Segment Decoders/Drivers
मैन्युफैक्चरर्स Fairchild Semiconductor 
लोगो Fairchild Semiconductor लोगो 
पूर्व दर्शन
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DM7446A pdf
Function Table
Decimal or
Inputs
BI/RBO
Outputs
Note
Function LT RBI D C B A (Note 1) a b c d e f g
0 HHL L L L H L L L L L LH
1 HX L L LH H HL LHHHH
2 HXL LHL H L LHL LHL
3 HX L LHH H L L L LHHL
4 HX LH L L H HL LHH L L
5 HXLHLH H LHL LHL L
6 HX LHHL H HH L L L L L
7 H X L H H H H L L L H H H H (Note 2)
8 HXHL L L H L L L L L L L
9 HXHL LH H L L LHH L L
10 H X H L H L H H H H L L H L
11 H X H L H H H H H L L H H L
12 H X H H L L H H L H H H L L
13 H X H H L H H L H H L H L L
14 H X H H H L H H H H L L L L
15 H X H H H H H H H H H H H H
BI X X X X X X L H H H H H H H (Note 3)
RBI H L L L L L L H H H H H H H (Note 4)
LT L X X X X X H L L L L L L L (Note 5)
H = HIGH level,
L = LOW level,
X = Don’t Care
Note 1: BI/RBO is a wire-AND logic serving as blanking input (BI) and/or ripple-blanking output (RBO).
Note 2: The blanking input (BI) must be OPEN or held at a HIGH logic level when output functions 0 through 15 are desired. The ripple-blanking input (RBI)
must be OPEN or HIGH if blanking of a decimal zero is not desired.
Note 3: When a LOW logic level is applied directly to the blanking input (BI), all segment outputs are HIGH regardless of the level of any other input.
Note 4: When ripple-blanking input (RBI) and inputs A, B, C, and D are at a LOW level with the lamp test input HIGH, all segment outputs go H and the rip-
ple-blanking output (RBO) goes to a LOW level (response condition).
Note 5: When the blanking input/ripple-blanking output (BI/RBO) is OPEN or held HIGH and a LOW is applied to the lamp-test input, all segment outputs are
L.
Logic Diagram
www.fairchildsemi.com
2

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