3 Description. The MAX device is a dual driver/receiver that includes a capacitive voltage generator to supply. TIA/EIAF voltage levels from a single 5-V. Available in quad flatpack package. For free samples & the latest literature: caubracderfama.ml, or phone For small orders, phone. description/ordering information. The MAX is a dual driver/receiver that includes a capacitive voltage generator to supply TIA/EIAF voltage levels from a.
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The MAX is a dual driver/receiver that includes a capacitive voltage generator to supply EIA voltage levels from a single 5-V supply. Each receiver. C VCC. Ordering Information and Selection Table appears at end of data sheet . MAX/MAX/MAXA Pin Configuration and Typical Operating Circuit. DIP16L. MAX is compatible with RS standard, and consists of dual transceiver. Each receiver converts TIA/EIAE levels into 5V TTL/CMOS levels.
Let's just get through the Hyperterminal screens: Call it whatever you want More than likely, the serial port on your computer is COM1 You want bps 8-N-1 without flow control The main settings are bps and 8-N This means that the micro and the computer agree to talk at a rate of bits per second bps and that each byte will have 8 data bits, with no parity bit, and only 1 stop bit. This '8-N-1' is very common and basic.
If you like pain, go read about parity , 1.
No one really uses it in the breadboarding world. Mkay, you've got hyperterminal open and kicking. You've got your MAX or equivalent circuit built up and powered on.
Before you connect it to your micro, you should test that the MAX circuit works. It's called a 'loop-back' the big yellow wire pictured above.
MAX232 PDF Datasheet浏览和下载
The 0s and 1s get asserted on the R1OUT pin. Upon hitting the computer, the computer 'sees' these 1s and 0s and says 'oh!
The computer then displays the character 'A' in the hyperterminal screen. This is the essence of a loop-back test.
If everything is kosher, you should be able to jam away on the keyboard and see those letters echoed back to the terminal window. Pull the jumper out and the characters should stop echoing.
Use it! In the future, when you need to test a serial interface, short TX and RX together to make sure things are working correctly. All right, you've got the MAX working correctly. ATmega8 with power supply and MAX circuit. This is a 0. Again, your board will more than likely run without decoupling caps but I just want to instill in you a habit of using 0.
MAX232: Construction, Operation, Types and Application
What is this 'SP'? It's a the Sipex generic of the MAX Notice the '3' in front of the ?
Because circuits started to run on lower voltages 3. Hence the 3V designation 'SP'. Trivia: In the picture above, which IC is the older sibling? These ICs have simple date codes: and means both ICs were manufactured in in the 41st and 25th weeks of the year. You should now have the hardware in place to allow you to do printf statements. Let's mess with some code!
Feedback from a reader: "Friends don't let friends use hyperterminal. It is one sucky program. In the above circuit only one Driver is used and second driver can be used for other purpose.
TTL data is available on pin 12 and pin 11 and these pins can be attached to Microcontroller or any system which accept TTL logic.
MAX is used to solve this problem. Sir there is a question in my mind, if a circuit disgine for 9v dc and i want to operate it on v AC. What should i do. There is one way that i know is, step dowm transformer and rectifier. But if I dont have transformer, but resistors.
Kindly tell me resistor velue to step down…. Wow, I like your advancements in electrical technology.
Intergrated circuits are really awesome. Your email address will not be published.
Transmission pin of first converter module for RS cable. Connects to the ground of the circuit. Complete Technical Details can be found at the datasheet give at the end of this page.
Hence if you are looking for an IC to perform this conversion and interface a Microcontroller with your computer then MAX IC is the right one for you. This IC is easy to set-up and can be used easily.
The IC also needs four capacitors to work; these capacitors can be of any value from 1uF to 22uF. MAX IC can help you to convert two logic level conversion that is you can use two Microcontrollers, but to get started we will use only one MCU and connect it to a computer, the complete circuit is to do the same is shown below.
As you can see the pins T2 out, R2 in, T2 in, R2 out are left free since we are not using the second module. Every microcontroller that has Serial communication capability will have a Tx pin and a Rx pin. These two pins should be connected to the T1 in pin 10 and the R1 out pin 13 pin respectively. This is made possible by a method called charge pump, which consists of a capacitor that charges up to provide 25V. Submitted by admin on 12 October We love feedback! The RS is not a compatible in the microprocessors and microcontrollers using through the voltage converter we can convert the RS signal to TTL voltage which are acceptable to the pins i.
Let's unleash the serial communication. We can see the DB9 packages to the desktops and some old laptops. Hence the 3V designation 'SP'.
Pin 11 and pin 12 are obtained from the TTL data and these two pins are attached to the Microcontroller. It's just a name for a standard that has propagated from generation to generation of computers. Connects to negative end of second capacitor.
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