HEF Datasheet, HEF PDF, HEF Data sheet, HEF manual, HEF pdf, HEF, datenblatt, Electronics HEF, alldatasheet, free. 15 Apr Data sheet acquired from Harris Semiconductor. SCHSC − Revised October HCDB consists of an oscillator section and CMOS Stage Ripple-Carry Binary Counter/Divider and Oscillator. CMOS Stage Ripple-Carry Binary Counter/Divider and Oscillator – CDB. Datasheet.

Author: Arashile Balrajas
Country: Kenya
Language: English (Spanish)
Genre: Literature
Published (Last): 22 April 2011
Pages: 321
PDF File Size: 1.45 Mb
ePub File Size: 6.65 Mb
ISBN: 185-4-54314-493-5
Downloads: 16712
Price: Free* [*Free Regsitration Required]
Uploader: Mebei

But this time the maximum count value is limited to In Run mode only hef4060 datasheet SET button will have any effect, the other 3 buttons are inhibited. As a hef4060 datasheet of fact, there’s no more on sheet number one to be explained. These kind of capacitors usually have a black line on top heg4060 their body. Hef4060 datasheet allows you to accurately synchronize the clock with a known good time source.

It doesn’t really matter whether we use a rising or falling edge here because this carry pulse is very short.

CDB CMOS Stage Ripple-Carry Binary Counter/Divider and Oscillator |

I have covered the time base hef4060 datasheet the counters here. This pulse is used to datasueet the colon between the hef4060 datasheet digits and the minute digits on the display.

It uses a TP1 is a test point at which you can measure the buffered There’s one output we might use though. The Hef4060 datasheet Let’s start simple, the buttons, which hf4060 used to set the time. This will produce a high going reset pulse on the output of IC10B. This helps to tune the frequency of the time base to the correct value.

OK, that’s enough for this one page. Together with this knowledge you should be able to hef4060 datasheet the clock yourself too.

From then on the flip-flop remains in that state, until the hours counter is reset to 0 again. Next stop, the minutes counter. hef4060 datasheet

Access Denied

The other sheet covers the display circuit and the power supply. On the next page I’ll explain the display circuit and power supply of the clock. In SET mode the SET signal hef4060 datasheet high, and the seconds to minutes carry can never occur because the seconds counter is held in reset. hef4060 datasheet

hef4060 datasheet We need 1Hz, not dagasheet, to feed to our seconds counter. IC2 forms the time base oscillator and first pre-scaler stage. It is spread over two sheets, one sheet covers the time base and the seconds, minutes and hours counters. Its signal level is constantly low, with only a very short rising pulse when the counter reaches 60 minutes.

This pulse is very short because its cause is removed by the reset almost instantly. We are hef4060 datasheet interested in two others, the Hz and the 64Hz hef4060 datasheet, which are used in the display section of the clock. But when the most significant digit of the hours counter increments the clock input of the flip-flop rises, which sets the flip-flop, making the Q output low. The output pulse from IC10A hef0460 goes out to the minutes counter, which has to be advanced at every hef4060 datasheet of the seconds counter.

The clock can be in one of two different modes, in Hef4060 datasheet he4f060 or in Set mode.

What is IC3B doing there? Once the counters reach that state they are reset back to 0 again. It is very important to use 0 tempco capacitor for Hef4060 datasheet. This will increase the stability of your clock. This signal is hef4060 datasheet datashert the seconds counter, as described below.

Author: admin