Standalone serial transmission without arduino

Hello Guys,

I am building a remote control system, in which the receiver is an arduino and all of receiver part function is controlled by it.
In transmitter part, I want to transmit an 8-bit decoder parallel output Serially in a TX-RX channel. I can use a PISO (parallel-in-serial-out) register to convert them in serial data and another arduino to transmit the data in a baud rate of 9600bps.

My question is how can I use a UART IC (PC1655D ) to send the data instead of using an arduino.

datasheet :http://www.ti.com/lit/ds/symlink/pc16550d.pdf

What "system" is your 16550 on? That's a standard PC-class UART and you usually access it with filesystem calls from the operating system. (Using shift registers would be difficult; you'd need extra bits to handle the start and stop bits.)
(The 16550 is also a process-oriented uart, so it's not well-suited to just connecting up to 8 digitial outputs from some other device; you need a processor in there. I think you can still get A HD-6402 standalone UART, which might be closer to what you had in mind... (but you'll also need a clock))

(Heh. my first project after I graduated from college used two 6402 uarts (from Jameco, even!) to convert 6bit 150bps (?) newswire data to 8bit 300bps data that our mainframe could understand. 1981... Good times!)

I was wondering why aren't there many DIP UART ICs. Now I know that most of them are process oriented i.e. used along with Processors.
The 6404 ic is also an uart (40 pins and I dont need reciver part).

I thought of using Encoder and decoder pair HT12E and HT12D, but i dont know how to implement 8 bit data with two start and stop bits. (about parity, i am not sure).

Is there any way to use encoder and decoders?
( for minimal circuit and like uart standard serial transmission)

I was wondering why aren't there many DIP UART ICs.

Also... These days a microcontroller is cheaper and easier to use. You could stick another Arduino at the transmitter, and easily transmit up to 18 bits of parallel data over its uart. A Nano clone, or a "bare" ATmegaxx8 is probably smaller, cheaper, and easier to wire than one of the old 40pin UARTs and associated circuitry.