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HEF4555BDPHIN/a1avaiDual 1-of-4 decoder/demultiplexer
HEF4555BPPHILIPSN/a1550avaiDual 1-of-4 decoder/demultiplexer
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HEF4555BT ,Dual 1-of-4 decoder/demultiplexerINTEGRATED CIRCUITSDATA SHEETFor a complete data sheet, please also download:• The IC04 LOCMOS HE40 ..
HEF4556BP ,Dual 1-of-4 decoder/demultiplexer
HEF4556BT ,Dual 1-of-4 decoder/demultiplexer
HEF4556BT ,Dual 1-of-4 decoder/demultiplexer
HEF4557BD ,1-to-64 bit variable length shift registerINTEGRATED CIRCUITSDATA SHEETFor a complete data sheet, please also download:• The IC04 LOCMOS HE40 ..
HEF4557BD ,1-to-64 bit variable length shift registerINTEGRATED CIRCUITSDATA SHEETFor a complete data sheet, please also download:• The IC04 LOCMOS HE40 ..
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HEF4555BD-HEF4555BP-HEF4555BT
Dual 1-of-4 decoder/demultiplexer

Philips Semiconductors Product specification
Dual 1-of-4 decoder/demultiplexer HEF4555B
MSI
DESCRIPTION

The HEF4555B is a dual 1-of-4 decoder/demultiplexer.
Each has two address inputs (A0 and A1), an active LOW
enable input (E) and four mutually exclusive outputs which
are active HIGH (O0 to O3). When used as a decoder, when HIGH, forces O0 to O3 LOW. When used as a
demultiplexer, the appropriate output is selected by the
information on A0 and A1 withE as data input. All
unselected outputs are LOW.
PINNING
FAMILY DATA, IDD LIMITS category MSI

See Family Specifications
HEF4555BP(N): 16-lead DIL; plastic
(SOT38-1)
HEF4555BD(F): 16-lead DIL; ceramic (cerdip)
(SOT74)
HEF4555BT(D): 16-lead SO; plastic
(SOT109-1) ): Package Designator North America enable inputs (active LOW) and A1 address inputs to O3 outputs (active HIGH)
Philips Semiconductors Product specification
Dual 1-of-4 decoder/demultiplexer HEF4555B
MSI
TRUTH TABLE
Notes
H= HIGH state (the more positive voltage)L= LOW state (the less positive voltage) X= state is immaterial
Philips Semiconductors Product specification
Dual 1-of-4 decoder/demultiplexer HEF4555B
MSI
AC CHARACTERISTICS

VSS= 0 V; Tamb =25 °C; CL= 50 pF; input transition times≤ 20 ns
APPLICATION INFORMATION

Some examples of applications for the HEF4555B are: Code conversion. Address decoding. Demultiplexing: when using the enable input as data input.
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