High Speed CMOS Logic Dual Decade Ripple Counter

The CD74HC390 and CD74HCT390 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
CD74HCT390MTE4 Rochester Electronics LLC Decade Counter, HCT Series, Asynchronous, Negative Edge Triggered, 4-Bit, Up Direction, CMOS, PDSO16, GREEN, PLASTIC, MS-012AC, SOIC-16
CD74HCT390E Rochester Electronics LLC Decade Counter, HCT Series, Asynchronous, Negative Edge Triggered, 3-Bit, Up Direction, CMOS, PDIP16,
CD74HCT390ME4 Rochester Electronics LLC Decade Counter, HCT Series, Asynchronous, Negative Edge Triggered, 4-Bit, Up Direction, CMOS, PDSO16, GREEN, PLASTIC, MS-012AC, SOIC-16
CD74HCT390M Rochester Electronics LLC Decade Counter, HCT Series, Asynchronous, Negative Edge Triggered, 3-Bit, Up Direction, CMOS, PDSO16
CD74HCT390MT Rochester Electronics LLC Counter
CD74HCT390M96 Rochester Electronics LLC Counter
CD74HCT390M96E4 Texas Instruments High Speed CMOS Logic Dual Decade Ripple Counter 16-SOIC -55 to 125
CD74HCT390MG4 Texas Instruments High Speed CMOS Logic Dual Decade Ripple Counter 16-SOIC -55 to 125
CD74HCT390MT Texas Instruments High Speed CMOS Logic Dual Decade Ripple Counter 16-SOIC -55 to 125
CD74HCT390M Texas Instruments High Speed CMOS Logic Dual Decade Ripple Counter 16-SOIC -55 to 125
CD74HCT390 's PackagesCD74HCT390 's pdf datasheet
CD74HCT390E PDIP
CD74HCT390EE4 PDIP
CD74HCT390M SOIC
CD74HCT390M96 SOIC
CD74HCT390M96E4 SOIC
CD74HCT390M96G4 SOIC
CD74HCT390ME4 SOIC
CD74HCT390MG4 SOIC
CD74HCT390MT SOIC
CD74HCT390MTE4 SOIC
CD74HCT390MTG4 SOIC




CD74HCT390 Pinout, Pinouts
CD74HCT390 pinout,Pin out
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