Datasheet

Temperature Sensor
SN65HVS885
SLAS638 – JANUARY 2009 ............................................................................................................................................................................................... www.ti.com
Table 2. Function Table
INPUTS
FUNCTION
LD CLK CE
L X X Parallel load
H X H No change
H ↑ L Shift
(1)
(1) Shift = content of each internal register shifts towards serial outputs.
Data at SIP is shifted into first register.
An on-chip temperature sensor monitors the device temperature and signals a fault condition if the temperature
exceeds a first trip point at 150 ° C by pulling the HOT output low. If the junction temperature continues to rise,
passing a second trip point at 170 ° C, all device outputs assume high impedance state.
A special condition occurs when the chip temperature exceeds the second temperature trip point due to an
output short; the HOT output buffer becomes high impedance, thus separating the buffer from the external
circuitry. An internal 100-k Ω pulldown resistor, connecting the HOT-pin to ground, is used as a " cooling down "
resistor, which continues to provide a logic low level to the external circuitry.
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