High Speed CMOS Logic Dual Decade Ripple Counters

The CD74HC390 and CD74HC390 dual 4-bit decade ripple Counters are high-speed silicon-gate CMOS devices and are pin compatible with low-power Schottky TTL (LSTTL). These devices are divided into four separately clocked sections. The Counters have two divide-by-2 sections and two divide-by-5 sections. These sections are normally used in a BCD decade or bi quinary configuration, since they share a common master reset (nMR). If the two master reset inputs (1MR and 2MR) are used to simultaneously clear all 8 bits of the Counter a number of counting configurations are possible within one package. The separate Clock inputs (nCP0 and nCP1) of each section allow ripple Counter or frequency division applications of divide-by-2, 4. 5, 10, 20, 25, 50 or 100. Each section is triggered by the High-to-Low transition of the input pulses (nCP0 and nCP1).
For BCD decade operation, the nQ0 output is connected to the nCP1 input of the divide-by-5 section. For bi-quinary decade operation, the nO3 output is connected to the nCP0 input and nQ0 becomes the decade output.
The master reset inputs (1MR and 2MR) are active-High asynchronous inputs to each decade Counter which operates on the portion of the Counter identified by the "1" and "2" prefixes in the pin configuration. A High level on the nMR input overrides the Clock and sets the four outputs Low.
By Texas Instruments
Part Manufacturer Description Datasheet Samples
CD74HC390M Rochester Electronics LLC Decade Counter, HC/UH Series, Asynchronous, Negative Edge Triggered, 3-Bit, Up Direction, CMOS, PDSO16,
CD74HC390E Rochester Electronics LLC Decade Counter, HC/UH Series, Asynchronous, Negative Edge Triggered, 3-Bit, Up Direction, CMOS, PDIP16,
CD74HC390ME4 Rochester Electronics LLC Decade Counter, HC/UH Series, Asynchronous, Negative Edge Triggered, 4-Bit, Up Direction, CMOS, PDSO16, GREEN, PLASTIC, MS-012AC, SOIC-16
CD74HC390MTE4 Rochester Electronics LLC Decade Counter, HC/UH Series, Asynchronous, Negative Edge Triggered, 4-Bit, Up Direction, CMOS, PDSO16, GREEN, PLASTIC, MS-012AC, SOIC-16
CD74HC390M96 Rochester Electronics LLC Counter
CD74HC390MT Rochester Electronics LLC Counter
CD74HC390EE4 Rochester Electronics LLC Counter
CD74HC390M Texas Instruments High Speed CMOS Logic Dual Decade Ripple Counters 16-SOIC -55 to 125
CD74HC390M96G4 Texas Instruments High Speed CMOS Logic Dual Decade Ripple Counters 16-SOIC -55 to 125
CD74HC390ME4 Texas Instruments HC/UH SERIES, ASYN NEGATIVE EDGE TRIGGERED 4-BIT UP DECADE COUNTER, PDSO16, GREEN, PLASTIC, MS-012AC, SOIC-16
CD74HC390 's PackagesCD74HC390 's pdf datasheet
CD74HC390E PDIP
CD74HC390EE4 PDIP
CD74HC390M SOIC
CD74HC390M96 SOIC
CD74HC390M96E4 SOIC
CD74HC390M96G4 SOIC
CD74HC390ME4 SOIC
CD74HC390MG4 SOIC
CD74HC390MT SOIC
CD74HC390MTE4 SOIC
CD74HC390MTG4 SOIC




CD74HC390 Pinout, Pinouts
CD74HC390 pinout,Pin out
This is one package pinout of CD74HC390,If you need more pinouts please download CD74HC390's pdf datasheet.

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