E910.54B37AB ELMOS Semiconductor, E910.54B37AB Datasheet - Page 13

• Manufacturer Part Number: E910.54B37AB
• Description: Interface - Specialized FlexRay Transceiver
• Manufacturer: ELMOS Semiconductor

Specifications of E910.54B37AB

• Rohs: yes
• Product Type: FlexRay Transceiver
• Operating Supply Voltage: 5 V
• Supply Current: 50 mA
• Maximum Power Dissipation: 150 mW
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Package / Case: TSSOP-14
• Minimum Operating Temperature: - 40 C

4.2 e910.54 functional blocks
4.2.1 block diagram
Figure 7: E910.54 simplified block diagram
4.2.2 Power supplies
The main power supply is at the VCC pin from an external voltage source. There is neither a low power mode nor
power supply from the battery by means of an internal 5V regulator. The voltage pin VIO delivers the correct volt-
age for the I/O stages to/from communication controller and host controller. VCC (5V level) delivers the power for
the transmitter and the receiver circuits and some auxiliary blocks (logic, power supply, failure detector).
VIO (3.3V level or 5V level) is the upper reference of the inputs and the outputs from/to the communication and
the host controller. Internal level shifters transfer the signals from VIO level to the VCC level and vice versa. Note
that all connections to the CC and the host must have the same voltage high level (all 3.3V or all 5V).
4.2.2.1 voltage monitor
A voltage monitor compares the external voltage VCC with an internal reference voltage. If the supply voltage
VCC is lower than the VCC undervoltage threshold, the output of the VCC monitor delivers the undervoltage flag
VCCOK=0. The undervoltage signal is low active. It disables the transmission to the bus and sends the failure flag
value to the host via SPI, if the SPI is able to work.
4.2.2.2 temperature protection
The E910.54 provides an overtemperature supervision. In case the junction temperature rises above the overtem-
perature detection threshold the OTEMP flag is set in the SPI register and the INTN pin changes to ‚low’. The BD
outputs send idle state to the bus.
ELMOS Semiconductor AG
SCSN
TxEN
INTN
SDO
SCK
VCC
RxD
TxD
SDI
VIO
Controller Interface
Supply
Power
(SPI + Interrupt)
Communication
Host Interface
Overtemp.
Undervolt.
Monitor
Monitor
Data sheet
GND
13/28
Internal
Logic
POR
Vref
Bus Failure
Transmitter
Receiver
Detector
E910.54
QM-No.: 25DS0004.00 2010-02-03
BP
BM
E910.54