DS9490R USB to 1-Wire Adapter: Datasheet, Pin Configuration, DS9490R vs. DS9490B

DS9490R Pinout

DS9490R is a USB to 1-wire adapter embedded with 1-wire technology launched by Maxim integrated. A 1-wire output sensor is connected to a computer via a USB port with this adapter. This connector converts a 1-wire connection to a USB connection that may be utilized with a computer's USB port.

• The device is based on a DS2490 1-wire chipset.

• During active mode, it consumes up to 58 mA of current. And in the suspended state it is about 0.5 mA.

• Each DS9490 USB to 1-wire bridge has its own unique 64-bit identification number due to DS2401.

• The adapter works at a fast data rate of 12Mbps through Universal Serial Bus interface.

• It can interface with 1-wire protocol sensors and devices.

• For communicating with different 1-wire peripherals, DS9490R has a programmable 1-wire timing.

• Integrated with the standard RJ11 interface for connectivity purposes.

• Contains open-drain suspended USB output which if high is in a non-suspended state and vice versa.

• It has internal pull-up resistors for better data communication.

• Read/write operations are carried out through a 1-wire bus.

• To read values from sensors like DS18B20, DS1402D etc.

• To communicate with iButton devices

• Interface 1-Wire protocol with USB

• Read and Configure iButton devices.

1. The DS9490B is a USB bridge and holder for a single F5-size iButton. The iButton is securely held behind a latched door.

2. The DS9490R is a USB bridge with a 1-Wire RJ11 interface to accommodate 1-Wire receptacles and networks.

3. For a list of suitable 1-Wire network cables, refer to the Connectivity Matrix table in the DS1402x 1-Wire network cables datasheet. Both adapters are based on the DS2490 USB-to1-Wire bridge chip.

4. While DS9490R works well with the DSXX line of sensors, using a direct connector with DS9490R while working with iButton can be difficult. As a result, Maxim offers the DS9490B, which includes a specialized holder for the iButton.

5. The DS9490R and DS9490B consume 58mA in USB active mode and 0.5mA in suspend mode.

The DS9490R is a straightforward USB to the 1-Wire adapter. The 1-Wire standard is supported by a wide range of sensors and other devices from Maxim. When these sensors/devices need to be connected to a computer, the one-wire connection must be converted to USB, which is exactly what this DS9490R connector does. On one end, it contains an RJ11 connection that must be linked to the sensor/device through a cable. This RJ11 port can also be used to connect an array of sensors. If you're looking for a connector to link your 1-Wire sensor to your computer, the DS9490R is a good option.

The DS9490R is a USB bridge that connects your PC to a sensor that uses the one-Wire protocol. The sensor must be linked to the RJ11 port on this connector before connecting it to the computer. Every one-wire sensor has two wires: one for signal/IO (also known as 1-Wire Data) and one for ground (a.k.a 1-Wire Return).

The RJ11 connector has a total of 6 pins, however, we will only use 4 for our application. The sensor can be powered by Vdd(5v) and Ground, with the OW pin linked to the sensor's a signal/IO pin and the GND OW pin connected to the sensor's ground pin. The signal ground (pin4) is distinct from the power ground (pin3) (pin 2). The following is a symbolic representation of the same.

How to use DS9490R

The RJ11 connector can also be used to link several sensors in an array. The DS9490R should instantly recognize itself when hooked into a computer because it uses the standard DS2401 IC and follows the 64-bit ID.

In order to shorten the time to market and keep up with the development of the market, you need a complete integration from the chip to the supply chain. Maxim Integrated can provide you with integrated solutions in the industrial, medical, consumer, automotive, energy, computing and communications fields.