CD4555B and CD4556B are dual one-of-four decoders/demultiplexers. Each decoder has two select inputs (A and B), an Enable input (E\\), and four mutually exclusive outputs. On the CD4555B the outputs are high on select; on the CD4556B the outputs are low on select.
●When the enable input is high, the outputs of the CD4555B remain low and the outputs of the CD4556B remain high regardless of the state of the select inputs A and B. The CD4555B and CD4556B are similar to types MC14555 and MC14556, respectively.
●The CD4555B and CD4556B types are supplied in 16-lead hermetic dual-in-line ceramic packages (F3A suffix), 16-lead dual-in-line plastics packages (E suffix), and 16-lead small-outline packages (M, M96, and MT suffixes). The CD4555B is also supplied in 16-lead small-outline packages (NSR suffix) and 16-lead thin shrink small-outline packages (PW and PWR suffixes.)
● Expandable with multiple packages
● Standard, symmetrical output characteristics
● 100% tested for quiescent current at 20 V
● Maximum input current of 1 µA at 18 V over full package temperature range; 100 na at 18 V and 25°C
● Noise margin (full package-temperature range):
● 1 V at VDD = 5 V
● 2 V at VDD = 10 V
● 2.5 V at VDD = 15 V
● 5-V, 10-V, and 15-V parametric ratings
● Meets all requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications for Description of "B" Series CMOS Devices"
● Applications:
● Decoding
● Code conversion
● Demultiplexing (using Enable input as a data input)
● Memory chip-enable selection
● Function selection