Features

⚫ Exceeds Requirements of EIA-485 Standard

⚫ Hot Plug Circuitry - Tx and Rx Outputs Remain ThreeState During Power-up/Power-down

⚫ Supply voltage: 3.0V ~ 5.5V

⚫ Data Rate: 32Mbps or 500Kbps

⚫ Up to 256 Nodes on a Bus (1/8 unit load)

⚫ Full Fail-safe Receiver (Open, Short, Terminated)

⚫ H/F control to support Half and Full Duplex RS485

⚫ Polarity Control to Correct for Bus Reversal through

RXP/TXP Pins

⚫ Bus-Pin Protection:

±12 kV IEC61000-4-2 Contact Discharge

±15 kV IEC61000-4-2 Air Discharge

±2 kV IEC61000-4-4 Fast Transient Burst

⚫ –40°C to 125°C Operation Temperature Range

Applications

⚫ Home Appliance

⚫ Motor Drives

⚫ Industrial Control

⚫ Communication Infrastructur

Description

The TPT4089 is IEC61000 ESD protected, 5V transceivers that

meet the RS-485 and RS-422 standards for Half and Full Duplex

communication.

The TPT4089 features a fail-safe receiver, which support the

output of the receiver to be logic high when the differential input

(bus pin A/B) of the receiver is open, short or idle when RXP=0V.

Transmitters in this family deliver exceptional differential output

voltages into the RS-485 required 54Ω load. The 10Mbps

devices have very low bus currents so they present a true “1/8

unit load” to the RS-485 bus. This allows up to 256 transceivers

on the network without using repeaters. Receiver (Rx) inputs

feature a “Full Fail-Safe” design, which ensures a logic high Rx

output if Rx inputs are floating, shorted, or on a terminated but

undriven bus. The TPT48x is characterized from –40°C to

125°C.