lpt and 74ls257

74LS253 datasheet & applicatoin notes - Datasheet Archive

74LS253 datasheet & applicatoin notes - Datasheet Archive

Text: Am25LS153 Am54LS/74LS153 Am25LS253 Am54LS/ 74LS253 Dual 4-Line To 1-Line Data Selectors/Multiplexers D IS T IN C T IV E C H AR AC TER ISTIC S Performs serial to parallel conversion Standard, 'LS153, and three-state, 'LS253, o u tp u t versions A m 25LS devices o ffe r the follo w in g , Am54LS/ 74LS253 ELECTRICAL .

Digital IC – Series 4000 and 74 – CBElectronics

Digital IC – Series 4000 and 74 – CBElectronics

Feel free to visit us anytime during our normal opening hours: Lebanon - Beirut - Sin El Fil - Horch Tabet - Centre Ivoire - Block A - Ground Floor

PART NO PINS DESCRIPTION PRICE - eesharifedu

PART NO PINS DESCRIPTION PRICE - eesharifedu

part no pins description price 74ls158 16 quad 2/1 multiplexer (inv out) call , 74ls195 16 4-bit parallel-access shift register 79 74ls196 14 presettable decade counter call 74ls197 14 preset binary counter call , 74ls257 16 quad 3-input multiplexer in-state 49

74 Series Logic Integrated Circuit ~ Electronic Note

74 Series Logic Integrated Circuit ~ Electronic Note

Jul 19, 2018· Rangkaian Terpadu Logika Digital 7400-Seri Dibuat oleh Texas Instruments dengan awalan "SN" untuk menciptakan SN74xxProdusen telah merilis perangkat kompatibel Pin-to-Pin 74xx untuk mengidentifikasi Produsen berbeda menggunakan prefiks ,

Digital Logic ICs Kit #2 (#3156) | NightFire Electronics LLC

Digital Logic ICs Kit #2 (#3156) | NightFire Electronics LLC

This is the Digital Logic ICs Kit #2 This kit includes various DIGITAL Logic ICs from a few different family types so that you can experiment with them and develop your own circuits

assembly - Simple EEPROM Programmer Through Parallel ,

assembly - Simple EEPROM Programmer Through Parallel ,

The EEPROM program is designed to connect to a standard PC's parallel printer port and work independent of processors speed An assembly program to read and write data from/to the EEPROM programmer from a PC is also to be developed I have hard wired a schematic, using the following devices: 32Kx8 EEPROm ( ATC28C256) 4 74LS374 74LS257 Mux .

Apple II Service Notes - willegal

Apple II Service Notes - willegal

Apple II Service Notes LEVEL 2 SERVICE NOTES Motherboard Page 1 A no reset condition when there is no cursor, no prompt, and no speaker beep as obvious symptoms Check pin 40 of the 6502 for a high to low transition when the reset key is pressed If no transition occurs check the following: Q5 (2N3904

Memory-based parallel data output controller - The United ,

Memory-based parallel data output controller - The United ,

Mar 06, 1984· We claim: 1 A memory-based parallel data output controller for the extraction of predetermined bits from an inputted bit serial digital data stream for use with a frame synchronizer of the type having a word counter, a bit counter, a link synchronization status signal and a reference clock, said output controller receiving said inputted bit serial digital data stream and decommutating said .

mame/atetriscpp at master mamedev/mame GitHub

mame/atetriscpp at master mamedev/mame GitHub

Join GitHub today GitHub is home to over 36 million developers working together to host and review code, manage projects, and build software together

MULTILOAD IN TERADATA PDF - aspirateurco

MULTILOAD IN TERADATA PDF - aspirateurco

Jan 02, 2019· The sample script attached below loads a sample fixed-length columns extract into a Teradata database using Parallel Data Pump – Terdaata TPump Custom Formatting In Teradata The ftp command line tool will fetch the extract from a source system into an ETL server

Any Serial Boards available for Apple-1 Mimeo | Applefritter

Any Serial Boards available for Apple-1 Mimeo | Applefritter

Are you looking to just load programs serially? You can hook up a simply UART to the parallel keyboard interface to load software It's easy enough to use two 74ls257 to keep both a Keyboard and serial interface connected at the same time

Tynemouth Software: Commodore 16 64K Upgrades

Tynemouth Software: Commodore 16 64K Upgrades

So to upgrade the Commodore 16 to 64K, we need to remove the two RAM chips and replace them with 4464 chips, and rewire one pin on each of the 74LS257 mux chips, disconnecting 5V and attaching A14 and A15 (it doesn't actually matter which way around they go as long as they are both connected up) This is where it gets to the choic

Information Technology Activities

Information Technology Activities

Home Security System ( Door Alarm) Groupmates : John Paul Justado May Flor Gentoleo Donna Molina Angelic Pamplona Russel Joy Suarez Images :

Apple II Plus — Wikipedia Republished // WIKI 2

Apple II Plus — Wikipedia Republished // WIKI 2

Transcription Hello and welcome back to another 8-Bit restoration project! So, what we have this time is the Bell & Howell For those who don’t know, this is actually an Apple II plus, and it was actually made by Apple and was rebranded under the name Bell and Howell mostly to sell under the education market, there’s a long story about that, kind of interesting

Simple EEPROM Programmer using Parallel Port - DaniWeb

Simple EEPROM Programmer using Parallel Port - DaniWeb

The EEPROM program is designed to connect to a standard PC's parallel printer port and work independent of processors speed An assembly program to read and write data from/to the EEPROM programmer from a PC is also to be developed I have hard wired a schematic, using the following devices: 32Kx8 EEPROm ( ATC28C256) 4 74LS374 74LS257 Mux .

Four-Player-Adapter (CGA) for Commodore 64 | markuskunn

Four-Player-Adapter (CGA) for Commodore 64 | markuskunn

Oct 01, 2012· As the 74LS257 is the only IC (and about the only technical thing in general) in the four-player-adapter, Enable can be connected to GND (thus enabling the chip) all the time You can read more about the technical details of this chip in it’s datasheet (just google “74LS257”)

TTL logic -- 8bit Projects For Everyone

TTL logic -- 8bit Projects For Everyone

TTL logic Logic chips from 74 seri Simple gates, counters, buffers, multiplexers, decoders, latches and other interesting functions They are povered from +5V supply Low state means below 08V, high state - over 20V Voltage range 08V to 20V is prohibited and may give uncertain results

Another C64 repair help needed (SOLVED!) - Commodore 64 ,

Another C64 repair help needed (SOLVED!) - Commodore 64 ,

Apr 26, 2010· - U13 (74LS257) socketed/replaced with a new one - U15 (74LS139) socketed/replaced with a new one , Check each pin one to one (with a continuity test on your multimeter) on all the memory, as most of the lines are parallel on all the chips/sockets except a 2 or 3 (check on a working board and make notes of which lines are not parallel) When .

74LS - Lee's Electronic Components

74LS - Lee's Electronic Components

Store information Lee's Electronic Components 4131 Fraser Street Vancouver British Columbia V5V4E9 Canada

sycelectronicaar

sycelectronicaar

SN74LS257B SN74LS258B sycelectronicaar 4 FUNCTIONAL DESCRIPTION The LS257B and LS258B are Quad 2-Input Multiplexers with 3-state outputs They select four bits of data from two

DIRECT MEMORY ACCESS AND DMA-CONTROLLED I/O:THE ,

DIRECT MEMORY ACCESS AND DMA-CONTROLLED I/O:THE ,

Aug 11, 2015· The address enable (AEN) output of the 8237 controls the output pins of the latches and the outputs of the 74LS257 (E) During normal 80X86 operation (AEN = 0), latches A and C and the multiplexer (E) provide address bus bits A19–A16 and A7–A0 , THE PARALLEL PRINTER INTERFACE (LPT), BUS INTERFACE:THE PERIPHERAL COMPONENT INTERCONNEC .

SN54/74LS259 8-BIT ADDRESSABLE LATCH

SN54/74LS259 8-BIT ADDRESSABLE LATCH

5-1 FAST AND LS TTL DATA 8-BIT ADDRESSABLE LATCH The SN54/74LS259 is a high-speed 8-Bit Addressable Latch designed for general purpose storage applications in digital systems

Full text of

Full text of "Fairchild Fairchild Advanced CMOS Technology ,

Full text of "Fairchild Fairchild Advanced CMOS Technology Seminar OCR" See other formats .

Pac Man Info - XMission

Pac Man Info - XMission

Replaced 74LS257 @ U2 on VRam addresser board (Thanks Fred!) , (Jr Pac/ Pac Man Plus) CHEAT EPROM This software modification was created by , Well the first two are easy, remote the dip switch 8 by wiring a switch in parallel and use a switch to open circuit the Speaker circuit This could be done on a DPDT switch mounted inside the coin door

Pac-man Repair & Troubleshooting Information - At ,

Pac-man Repair & Troubleshooting Information - At ,

Replaced 74LS257 @ U2 on VRam addresser board (Thanks Fred!) , Well the first two are easy, remote the dip switch 8 by wiring a switch in parallel and use a switch to open circuit the Speaker circuit This could be done on a DPDT switch mounted inside the coin door The third point is one I don't have a simple solution for other than don't .

Full text of

Full text of "Everyday Practical Electronics 2010 11"

Full text of "Everyday Practical Electronics 2010 11" See other formats .

74LS257 datasheet & applicatoin notes - Datasheet Archive

74LS257 datasheet & applicatoin notes - Datasheet Archive

74LS257 datasheet, cross reference, circuit and application notes in pdf format The Datasheet Archive Search Browse by Manufacturer Get instant insight into , with 8051 74LS14W basic-52 ic 8255 8255 interface using c language 8255 interface with 8051 written in c D8255 8255 parallel port circuit cellar Text: 74LS257

Tynemouth Software: February 2019

Tynemouth Software: February 2019

That could have been done without removing the chip, but the 74LS257 (and particularly the MOS version of the 257, the 7708) are all common failures in machines of this era, so as I was removing the other three, it always seems a good opportunity to replace both 74LS257 chips

74LS257 Texas Instruments | Logic - Signal Switches ,

74LS257 Texas Instruments | Logic - Signal Switches ,

Texas Instruments 74LS257 Logic - Signal Switches, Multiplexers, Decoders parts available at DigiKey

Electronic Components - style and fashion - doczz

Electronic Components - style and fashion - doczz

Electronic Components , 74LS161 74LS164 74LS166 74LS174 74LS191 74LS192 74LS193 74LS194 74LS221N 74LS240 74LS241 74LS243 74LS244 74LS245 74LS257 74LS258AN 74LS273 74LS365AN 74LS373 74LS374N 74LS377 74LS393 74LS541N 74S Code 74S00 , Maximum DCR for Series inductors for 8Ω load is 06Ω Total Maximum DCR for Parallel inductors for 8Ω load .