SN65HVS885 Datasheet, PDF (10/21 Pages) Texas Instruments – 34 V, Digital-Input Serializer for 5V Systems

SN65HVS885
SLAS638 – JANUARY 2009 ............................................................................................................................................................................................... www.ti.com
Table 2. Function Table
INPUTS
LD
CLK
CE
L
X
X
H
X
H
H
↑
L
FUNCTION
Parallel load
No change
Shift ⁽¹⁾
(1) Shift = content of each internal register shifts towards serial outputs.
Data at SIP is shifted into first register.
Temperature Sensor
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-kΩ 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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