CD4555BMS
CD4556BMS
CMOS Dual Binary to 1 of 4
Decoder/Demultiplexers
December 1992
CD4556BMS
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Features
Pinouts
• High Voltage Type (20V Rating)
E
A
1
2
3
4
5
6
7
8
16 VDD
• CD4555BMS: Outputs High on Select
• CD4556BMS: Outputs Low on Select
• Expandable with Multiple Packages
• 100% Tested for Quiescent Current at 20V
• Standardized, Symmetrical Output Characteristics
15
14
13
E
A
B
B
Q0
Q1
Q2
Q3
VSS
1/2 OF DUAL
1/2 OF DUAL
12 Q0
11 Q1
10 Q2
• Maximum Input Current of 1µA at 18V Over Full Pack-
age Temperature Range; 100nA at 18V and +25oC
9
Q3
• Noise Margin (Over Full Package/Temperature Range)
- 1V at VDD = 5V
CD4555BMS
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- 2V at VDD = 10V
E
A
1
2
3
4
5
6
7
8
16 VDD
- 2.5V at VDD = 15V
15
14
13
E
A
B
• 5V, 10V and 15V Parametric Ratings
B
• Meets All Requirements of JEDEC Tentative Standard
No. 13B, “Standard Specifications for Description of
‘B’ Series CMOS Devices”
Q0
Q1
Q2
Q3
VSS
1/2 OF DUAL
1/2 OF DUAL
12 Q0
11 Q1
10 Q2
Applications
• Decoding
9
Q3
• Code Conversion
• Demultiplexing (Using Enable Input as a Data Input
• Memory Chip-Enable Selection
• Function Selection
Functional Diagrams
VDD
16
4
2
Q0
A
3
5
6
7
Q1
Q2
Q3
B
E
1
Description
CD4555BMS and CD4556BMS are dual one-of-four decod-
ers/demultiplexers. Each decoder has two select inputs (A
and B), an Enable input (E), and four mutually exclusive out-
puts. On the CD4555BMS the outputs are high on select; on
the CD4556BMS the outputs are low on select.
12
11
10
9
Q0
Q1
Q2
Q3
14
A
13
B
15
E
8
VSS
When the Enable input is high, the outputs of the
CD4555BMS remain low and the outputs of the
CD4556BMS remain high regardless of the state of the
select inputs A and B. The CD4555BMS and CD4556BMS
are similar to types MC14555 and MC14556, respectively.
CD4555BMS
VDD
16
4
5
6
7
2
3
1
Q0
Q1
Q2
Q3
A
B
E
The CD4555BMS and CD4556BMS are supplied in these
16-lead outline packages:
12
11
10
9
Q0
Q1
Q2
Q3
14
13
15
A
B
E
Braze Seal DIP
Frit Seal DIP
Ceramic Flatpack
*CD4555B Only
*H46
H1E
H6W
†H4T
8
VSS
†CD4556B Only
CD4556BMS
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
File Number 3346
1-888-INTERSIL or 321-724-7143 | Copyright © Intersil Corporation 1999
7-1249