E520.35B62AC ELMOS Semiconductor, E520.35B62AC Datasheet - Page 26

• Manufacturer Part Number: E520.35B62AC
• Description: LIN Transceivers LIN SBC with VR & Watchdog
• Manufacturer: ELMOS Semiconductor

Specifications of E520.35B62AC

• Rohs: yes
• Operating Supply Voltage: 5 V
• Supply Current: 10 mA
• Maximum Operating Temperature: + 125 C
• Package / Case: QFN-20
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT

LIN SBC with Voltage Regulator and Watchdog
ADVANCE PRODUCT INFORMATION JUL 26, 2011
6.5.1
The watchdog cycle time can be configured via the external resistor at pin WDOSC. The typical
watchdog oscillator period t
t
6.5.2
For debugging purposes the watchdog can be stopped running by pulling pin WDDM to HIGH. In this
case the watchdog timer stopps and the actual state remains. After setting pin WDDM to low level the
watchdog keeps on running.
6.6
The integrated reverse polarity protected 6:1 voltage divider can be connected to the battery supply to
measure the supply voltage with fast response time. To limit the output voltage in case of VBAT
overvoltage a clamping to the microcontroller supply voltage is integrated.
The voltage divider is activated by the digital pin DIV_ON. The divided input voltage is available at pin
PV. In sleep mode the voltage divide is disabled to reduce sleep current consumption.
ELMOS Semiconductor AG
10
22
47
100
WD,OSC
= R
VBAT voltage divider
Watchdog cycle time configuration
Watchdog debug mode
WD,OSC
R
WD,OSC
/ kΩ
Fig. 14: Typical characteristic of the voltage divider
Table 3: Typical watchdog configuration examples
WD,OSC
is defined by the external resistance R
10
22
47
100
Data Sheet 26 / 29
t
WD,OSC
/ μ s
10.24
22.528
48.128
102.4
WD,OSC
by:
QM-No.: 25DS0060E.00
t
WD,CYC
/ ms
E520.35