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L9963T Datasheet(PDF) 15 Page - STMicroelectronics

Part # L9963T
Description  Automotive general purpose SPI to isolated SPI transceiver
PDF  45 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9963T Datasheet(HTML) 15 Page - STMicroelectronics

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L9963T
state
L9963T
configuration
TXAMP sampling
Note
Normal
state
Master (NSLAVE =
1)
The TXAMP setting is simply resynchronized (TTXAMP_SETUP
and TTXAMP_HOLD requirements still apply) and deglitched
(TTXAMP_DEGLITCH filter still present), but it is not latched upon NCS
assertion. The new amplitude setting is applied to the TX interface
as soon as the transmission of the SPI frame over the isolated SPI
interface begins.
In case several SPI
frames are being
pushed into the TX
queue, the setting
applied depends
on the last one
latched (no pipelining
supported).
Stand-by
state
Slave/Master
(NSLAVE = X)
The new TXAMP setting is latched during the wakeup sequence.
Hence, the TXAMP pin shall be stable TTXAMP_SETUP before the
DIS high → low transition is applied and shall not change during
TWAKEUP.
-
Reset
state
Slave/Master
(NSLAVE = X)
The initial TXAMP setting is latched during the first power up
sequence. Hence, the TXAMP pin shall be stable before VDD is
applied and shall not change duringTFIRST_POWERUP.
-
It is recommended to apply the same TXAMP setting to all the devices communicating on the bus, in order to
keep a constant SNR in every communication phase.
In order to meet standby consumption requirements, MCU must release the open drain output connected to
TXAMP while L9963T is in Stand-by state.
Figure 9. TXAMP pin structure
TXAMP
R
IN_PU
VIO
TO OPEN DRAIN OUTPUT
V3V3_STBY
TXAMP
3.2.1.8
Electrical parameters - Digital I/O
3.2.1.8.1
Digital input
All parameters are tested and guaranteed in the following conditions, unless otherwise specified: 4.5 V ≤ VVDD ≤
5.5 V ; -40 °C < Tj < 125 °C
Table 11. Digital input electrical characteristics
Symbol
Parameters
Test conditions
Min
Typ Max
Unit
VIN_L
Logic input low voltage.
-
-
-
0.8
V
VIN_H
Logic input high voltage.
-
1.8
-
-
V
L9963T
Pin configuration
DS13590 - Rev 4
page 15/45



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