74141 ttl decoder driver

They are 7441 decoder drivers, 7490, 7492, 7410 and 7400. Unfortunately supply of these chips, like supply of the nixie tubes. The input to the 74xx47 is a binary number dcba where d is 8s, c is 4s, b is 2s and a is 1s. If you can find a few 7441s or 74141s, you can use these vintage ics in a project. Its predecessor, the 7441, did not have these, so you would have to take care to keep its output voltage under 70 v under all cicumstances. This is a description of the design from tony duell. Nte electronics nte74141 integrated circuit bcdtodecimal. You must use the 74xx47 with a common anode 7segment display e. Bcd to seven segment decoder ic description, dictionary of. At the moment im testing it with 10 leds and a 4k7 resistor, expecting them to light up one at a time as per schematic. List of 7400 series integrated circuits 1 list of 7400 series integrated circuits the following is a list of 7400 series digital logic integrated circuits.

Check the different truth charts truth table for the 74141, 7441, 7441a and 7441b chip. Circuit specialists has been in business since 1971. Most nixie tube drivers require the obsolete and hard to find 7441 or 74141 ttl decoder driver ics, or else high voltage driver transistors. This decoder utilizes design improvements that minimize switching transients in order to maintain a stable display. Im having trouble with a 74141 ic while building a nixie clock. They have a very interesting decoder design using neon lamps hidden under the black lid just behind the nixie tube. The oncepopular sn74141 decoder nixie driver had builtin zener diodes of 55 volts on all outputs that could handle 1 ma. What a curious component it is, designed to interface the 5v ttl world with the high voltage nixie tubes. Driving a nixie with a 74141 bcd decoder more nixie tube experiments nixie clock 5v 12v power supply nixie clock pcbs eagle upgrade nixie clock main board pcb build nixie clock final build, part i nixie clock final build, part ii nixie clock final build, part iii clock button panels. As a physics student i always felt the need of a quick reference handpocketbook while carrying out the practicals in my electronics lab.

Traditionally a sn74141 bcdbinary coded decimaltodecimal driverdecoder is. Many older mos ics are not able to drive ttl inputs. A simple nixie display driver bobs electron bunker. November072003 finished back to dieters nixie tube page email to dieter as i have dozens of old unknown condition 74141 and 7441 driver chips laying around. The original 7400series integrated circuits were made by texas instruments with the prefix sn to create the name sn74xx. Nte74141 integrated circuit ttl bdc to decimal decoderdriver for cold cathode indicator tubes 16lead dip. The oncepopular sn74141 decoder nixie driver had builtin zener diodes of 55 volts. In this tutorial, you will learn how to control a nixie tube with an arduino nixie tubes were the only way to display numbers back in the 50s, before vfd and seven segments displays. Because of the popularity of these parts, they were secondsourced by. My nixie clock here are a few photos taken on 1022003 of the 6 digit nixie clock i am building. Integrated circuit ttl k155id1 sn74141 74141 dip 16 type. The following is a list of 7400series digital logic integrated circuits. Open collector ttl ics like these are designed to drive loads, not for. A high on either of the input enables forces the outputs high.

A free online environment where users can create, edit, and share electrical schematics, or convert between popular file formats like eagle, altium, and orcad. Note how the output letters of the integrated circuit output a match with the diode letters in the 7segment led. The ls42 is fabricated with the schottky barrier diode process for high speed and is completely compatible with all motorola ttl families. Ttlmsi 93141 74141 1oflo decoderdriver nixie description the 93141 74141 is a.

The 7441a was the first released sometime in the late 1960s. But they are hard to get and being ttl devices, they use more. It seems to be a military or industrial version with an extended temperature range. To me, an equally fascinating component is the 74141 nixie driver. The relative positivelogic output levels, as well as conditions required at the auxiliary inputs, are shown in the truth tables. These devices have two decoders with common 2bit address inputs and separate gated enable inputs. Hp made a decade counterdisplay board where the counter flipflops were made from pairs of transistors in the. Nixie driver k155id1 analog sn74141, 4141, 74141, sn74141n, 1551 dyi microchip decimal decoders high voltage driver ic for in12 in14 in18 etc. So far this is the layout of the 17 sockets soldered on my circuit board. November072003 finished back to dieters nixie tube page email to dieter as i have dozens of old. Here is a list of icsintegrated circuits of the series 74xx with their number and functions.

Fast and ls ttl data oneoften decoder the lsttlmsi sn5474ls42 is a multipurpose decoder designed to accept four bcd inputs and provide ten mutually exclusive outputs. It differs from the 74141 in that the input signals are not fully decoded, ie. Fortunately, something like this already exists, in the form of the 74141 ttl nixie driver ic, or its russian counterpart the k155id1. Output configurations of the sn5474ls47 are designed to withstand the relatively high voltages required for 7segment. The 7441 is the original bcd to decimal decoder driver offered by ti.

Each of these chips is a decoder featuring a fourline binary ttllevel input and ten outputs especially designed to directly drive nixie tube cathodes. Decoder a has an enable gate with one active high and one active low input. The sn7400 series originated with ttl integrated circuits made by texas instruments. Necs 3volt cbc8 cellbased asic series are ultrahigh performance submicron cmos products built within the opencad design systemtm of nec.

Home 74ls47 7447 ic bcd to sevensegment decoderdriver. The 74xx47 chip is used to drive 7 segment display. The outputs are to be connected directly to the ten cathodes of a nixie tube. The nte74141 is a secondgeneration bdctodecimal decoder in a 16lead. Perhaps it will be difficult to come by 1 piece of it i dont know if 74141 is produced still. It wasnt long before it was replaced by the 74141 which is pincompatible but provides blanking capability via input values greater than 9. Fairchild 9315 the 9315 is from fairchilds early 9300series ttl series. On one hand they were obviously a product from the radio tube area, and on the other hand they were used to display the results from the children of the revolution, digital ics. Nte74141 integrated circuit ttl bcd decimal decoderdriver. The easiest method is a driver that can pull individual cathodes. These monolithic bcdtodecimal decoderdrivers consist of eight inverters and ten fourinput nand gates. Note that it is possible in this design to turn on more than one transistor at a time, but this. In time of ttl logic fame the 74141 was almost exclusive alternative.

Vce transistor like the mpsa42 or to use a nixie driver chip like the 7441 or 74141 ttl chips. The device features two input enable e0 and e1 inputs. Bcd to seven segment decoder ic seven segment decoder. The 7441 and its successor, the 74141 were very common nixie driver ics from the ttl era. Test equipment, power supplies, soldering equipment, stepper motors, and much more.

These guys incorporate a bcdtodecade decoder which takes in binary numbers 0 through 9 binary coded decimal and internally uses that to drive one of 10 logic lines, each corresponding to a specific input digit. I wanted to produce a nixie display using easily obtainable parts well except for the nixies, and at the same time keep the parts count low. The 74141 bcd to decimal decoder and nixie driver ic is still in available. But they are hard to get and being ttl devices, they use more power and have larger input currents than modern ics. Fast and ls ttl data dual 1of4 decoder demultiplexer the sn5474ls155 and sn5474ls156 are high speed dual 1of4 decoderdemultiplexers. The inverters are connected in pairs to make bcd input date available for decoding by the nand gates. If this datasheet link is broken, the datasheet may still be available at. Rochester electronics llc, display driver, ttl, pdip16. Bcd to decimal decoderdriver for coldcathode indicatornixie tube 1 pcs. Active components integrated circuits chips digital 74141, mh74141, 1of10 decoderdriver for nixie tubes. Integrated circuit ttl k155id1 sn74141 74141 dip 16. Icttl bcd to decimal decoderdriver nixie tube vetco. However, there are still cases where using individual transistors is a good idea.

Details about upb74141d japanese ceramic nixie driver decoder ic nos sn74141, 74141, k155id1 upb74141d japanese ceramic nixie driver decoder ic. Due to the popularity of these parts, other manufacturers released pintopin compatible logic devices which kept the 7400 sequence number as an aid to identification of compatible parts. Nte electronics nte74141 integrated circuit bcdtodecimal decoder driver, 5. Full decoding of valid bcd input logic ensures that all. Ttl ic 74141 ensures bcd decoder and high voltage driver for individual digits. It decodes four binary weighted address inputs a0 to a3 to sixteen mutually exclusive outputs y0 to y15.