HEF4028B Datasheet, PDF (2/5 Pages) NXP Semiconductors – 1-of-10 decoder

Philips Semiconductors
1-of-10 decoder
DESCRIPTION
The HEF4028B is a 4-bit BCD to 1-of-10 active HIGH
decoder. A 1-2-4-8 BCD code applied to inputs A₀ to A₃
causes the selected output to be HIGH, the other nine will
be LOW. If desired, the device may be used as a 1-of-8
decoder with enable; 3-bit octal inputs are applied to inputs
A₀, A₁ and A₂ selecting an output O₀ to O₇. Input A₃ then
becomes an active LOW enable, forcing the selected
output LOW when A₃ is HIGH. The HEF4028B may also
be used as an 8-output (O₀ to O₇) demultiplexer with A₀ to
A₂ as address inputs and A₃ as an active LOW data input.
The outputs are fully buffered for best performance.
Product specification
HEF4028B
MSI
Fig.1 Functional diagram.
Fig.2 Pinning diagram.
January 1995
HEF4028BP(N): 16-lead DIL; plastic
(SOT38-1)
HEF4028BD(F): 16-lead DIL; ceramic (cerdip)
(SOT74)
HEF4028BT(D): 16-lead SO; plastic
(SOT109-1)
( ): Package Designator North America
PINNING
A₀ to A₃
O₀ to O₉
address inputs, 1-2-4-8 BCD
outputs (active HIGH)
FAMILY DATA, I_DD LIMITS category MSI
See Family Specifications
2