Philips 74HCT42
The 74HC/HCT42 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. The active LOW outputs facilitate addressing other MSI circuits with active LOW input enables.| Part No. | 74HCT42 |
|---|---|
| Datasheet | 74HCT42 Download |
| Manufacturer |  Philips |
| Description | BCD to decimal decoder 1-of-10 |
| Buy | Stock & Price |
FEATURES
● Mutually exclusive outputs● 1-of-8 demultiplexing capability
● Outputs disabled for input codes above nine
● Output capability: standard
● ICC category: MSI
GENERAL DESCRIPTION
7A. QUICK REFERENCE DATA GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns 74HC/HCT42 The 74HC/HCT42 decoders accept four active HIGH BCD inputs and provide 10 mutually exclusive active LOW outputs. The logic design of the “42” ensures that all outputs are HIGH when binary codes greater than nine are applied to the inputs. The most significant input (A3) produces an useful inhibit function when the “42” is used as a 1-of-8 decoder. The A3 input can also be used as the data input in an 8-output demultiplexer application. TYPICAL SYMBOL tPHL/ tPLH CI CPD Notes 1. CPD is used to determine the dynamic power dissipation (PD in µW): PD = CPD × VCC2 × fi + ∑ (CL × VCC2 × fo) where: fi = input frequency in MHz fo = output frequency in MHz ∑ (CL × VCC2 × fo) = sum of outputs CL = output load capacitance in pF VCC = supply voltage in V 2.
