All Questions
Tagged with ttl integrated-circuit
26
questions
0
votes
2
answers
72
views
Bredboard compatible FAST TTL [duplicate]
I have been looking for 16-bit ICs for a project i`m working on. The project is to build a 16-bit computer from scratch, therefor i decided i nedded cgips that could handle high clock-frequensies. ...
- 49
2
votes
1
answer
2k
views
Combining CMOS and TTL logic
I have a bunch of 74LS383 (TTL octal transparent latch with three-state outputs) and MM74C83N (CMOS 4-bit binary full adder) that I would like to connect together. I need to connect the output of the ...
user17592
1
vote
4
answers
3k
views
How to implement 8-bit 2:1 multiplexers on a PCB?
I need to implement a 2:1 multiplexer for 8-bit data. That is: as inputs it should take two 8-bit numbers and a Select line; and as output an 8-bit number.
I could use two 74HC(T)157s (this is a quad ...
user17592
3
votes
1
answer
251
views
Is there relation between logic chip names and their internal structure
I know that for instance an ATMega328 is a 8 bit MCU with 32k of program space, the same can be said for most other MCUs and some other ICs with a direct relation between the name and internal specs. ...
- 492
2
votes
2
answers
6k
views
Possible to use 7447 to drive common-cathode 7 segment display?
I know that the 74(LS)47 is designed to drive common-anode displays. However, is it possible to make it drive a common-cathode display? What is the simplest (in terms of components) way of doing this?
- 445
1
vote
2
answers
6k
views
Difference between 7446,47 etc
I have looked in the data sheets, as well as the TI article, but I am still unsure of the answer to this question:
What is the practical difference between a 7446 ("BCD to 7 segment decoder/driver ...
- 445
1
vote
1
answer
475
views
How could I efficiently implement this "TTL load"?
I'm attempting to test a parameter of an IC to the specifications listed in the data sheet. The data sheet describes the following load circuitry for the output:
The data sheet notes that CL be 50pF ...
- 476
5
votes
3
answers
2k
views
Driving LEDs / other small loads with a 74HC06 or similar inverter
I was recently reverse-engineering some firmware (and other bits) from a router, and spotted that the front panel LEDs were driven from a 74HC06 hex inverter gate chip rather than a proper LED driver.
...
- 10.8k
4
votes
2
answers
12k
views
What is the fastest 7400 series family? Is 74VHC faster than 74AHC?
What is the fastest 7400 series logic family?
Is 74VHC* faster than 74AHC*?
This list does not seem to be in any particular order:
http://en.wikipedia.org/wiki/7400_series
- 1,163
4
votes
3
answers
2k
views
IC chips and datasheets
I'm still just beginning my adventure into electronics and IC chips and datasheets have me confused so I'm going to ask a series of beginner questions will help me and hopefully others as well.
There ...
- 1,708
0
votes
2
answers
274
views
Three-state inverting octal buffer
I'm looking for a three-state inverting octal buffer for a replacement part for an old microprocessor lab. The package should be DIP. Ucc should be on pin 20. Chip select should be at pins 1 and 19 ...
- 3