USB to TTL

USB to TTL Serial Cable

USB has never been so easy...

The AVIT Research USB to TTL Serial Cable is designed to allow simple rapid connection of microprocessors to the USB interface. It allows legacy products using PC serial ports to be easily upgraded to USB. The cable contains a USB to serial converter chip and is terminated in a standard 0.1” pitch header. The serial data is at standard TTL levels allowing it to interface directly to the micro-processor of the intended application.

	Simple and Easy way to give USB support to your designs
	Connects directly to microcontroller UART or I/O pins
	PC communicates as a standard serial device
	All circuitry integrated into sleek, moulded USB plug
	Allows devices that previously used a MAX232 type level shifter to connect to a PC through a USB connector and appear as a standard COM port.
	Compatible with legacy software.
	Cheap and simple way of upgrading existing products.
	4-way connector (Gnd, RX, TX and +5v)
	Supports data rates up to 921.6 kbaud allowing a significant performance increase over a standard serial port.
	Allows devices to be powered from the USB port.

Driver software for the PC is provided and is compatible with Windows 98se, 2000, ME and XP. The drivers cause the USB device to appear as a standard serial port capable of baud rates up to 921600. This allows all windows programs to access the serial device exactly as if it were a built-in serial port.

The USB to TTL Serial Cable also provides a 5 volt supply to the target system which can supply up to 50mA. This allows many embedded applications to be run without a separate power supply. The output is fully protected against short circuits.

Online Tutorial - Click here to see how to install, connect and communication from a microcontroller to PC using the USB to TTL cable.

Frequently Asked Questions - Click here to view the most frequently asked questions and their answers.

Wire	Function
Black	Ground
Red	PC serial Tx (TTL Rx)
Blue	PC serial Rx (TTL Tx)
Yellow	+5v

Parameters	Min	Typ	Max	Units
Serial port speed	300		921600	baud
Power output voltage*	4.25	5.0	5.25	Volts
Power output current			50	mA
Operating Temperature	-40		+85	°C
Input Voltage threshold (High)	2.0			V
Input Voltage threshold (Low)			0.8	V
Output high drive current			8	mA
Output low drive current			-8	mA
Mating Connector	Harwin M20-9990405 or M20-9990406 Farnell 511-729 or 623-059

*Power supply voltage is dependant on the USB port to which the cable is connected. The minimum specified is the expected worst case when connected through a bus-powered hub that conforms to the USB specification.

Downloads
Windows Drivers 3.4 MB	Windows Drivers Download and extract to a folder, when windows detects the USB device select this folder as a location for the driver search
Data Sheet 378 KB	USB to Serial TTL Data Sheet

Pricing
Description	Price					Qty
Description	1+	5+	10+	50+	100+	Qty
USB to TTL	£ 20.00	£ 15.00	£ 14.00	£ 13.00	£ 12.00