ZHCSG90A May 2017 – February 2022 SN65HVD1781A-Q1
PRODUCTION DATA
The SN65HVD1781A-Q1 is designed to operate in hot swap or hot-pluggable applications. Key features for hot-pluggable applications are power-up and power-down glitch free operation, default disabled input and output pins, and receiver failsafe.
As shown in the Section 8.2, an internal power-on reset circuit keeps the driver outputs in a high impedance state until the supply voltage has reached a level at which the device will reliably operate. This circuit ensures that no problems occur on the bus pin outputs as the power supply turns on or off.
As shown in Section 8.4, the driver and receiver enable inputs (DE and RE) are disabled by default. This default ensures that the device neither drives the bus nor reports data on the R pin until the associated controller actively drivers the enable pins.