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HD74LS248 डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - BCD-to-Seven-Segment Decoder / Driver - Renesas

भाग संख्या HD74LS248
समारोह BCD-to-Seven-Segment Decoder / Driver
मैन्युफैक्चरर्स Renesas 
लोगो Renesas लोगो 
पूर्व दर्शन
1 Page
		
<?=HD74LS248?> डेटा पत्रक पीडीएफ

HD74LS248 pdf
HD74LS248
Function Table
Decimal
or
Function
LT
RBI
Inputs
DC
B
BI/
A RBO
a
b
Outputs
cde
f
Note
g
0 HHLLLLHHHHHHH L
1 HX LLLHH L HH L L L L
2 HX LLHL H HH L HH L H
3 H X L LHH H H H H H L L H
4 HX LHLL H L HH L L HH
5 HX LHLHH H L HH L HH
6 H X LHHL H H L H H H H H
7 H X LHHH H H H H L L L L
1
8 HXHLLL H HHHHHHH
9 HXHLLHH HHHH L HH
10 H X H L H L H L L L H H L H
11 H X H L H H H L L H H L L H
12 H X H H L L H L H L L L H H
13 H X H H L H H H L L H L H H
14 H X H H H L H L L L H H H H
15 H X H H H H H L L L L L L L
BI X X X X X X L L L L L L L L 2
RBI H L L L L L L L L L L L L L 3
LT L X X X X X H H H H H H H H 4
H; high level, L; low level, X; irrelevant
Notes: 1. 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.
2. When a low logic level is applied directly to the blanking input (BI), all segment outputs are off regardless of
the level of any other input.
3. When ripple-blanking input (RBI) and inputs A, B, C, and D are a low level with the lamp test input high, all
segment outputs go off and the ripple-blanking output (RBO) goes to a low level (response condition).
4. When a blanking input ripple blanking input (BI/RBO) is open or held high and a low is applied to the lamp-
test input, all segment outputs are on.
Rev.3.00, Jul.15.2005, page 2 of 6

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