33897 Datasheet, PDF (16/21 Pages) Freescale Semiconductor, Inc – Single Wire CAN Transceiver

TYPICAL APPLICATIONS
TYPICAL APPLICATIONS
The 33897/A/C/T can be used in applications where the
module includes a regulator that has the capability of going
into Sleep mode by having an Enable terminal. See Figure 9.
When the module’s regulator is in sleep mode, the module is
turned off. The module waits for a defined wake-up voltage
level on the bus. This wake-up voltage will activate the control
line, which enables the regulator and turns the module back
on. This 33897/A/C/T feature allows the module to be more
energy efficient since the current consumption is significantly
lowered when it goes into sleep mode.
V_CC
MCU
V_CC
Voltage
Regulator
EN
Power
Source _{100 nF}
VBATT
100 pF
4.7 µF
10 kΩ ^{2.7 kΩ}
CNTL
TXD
BUS
RXD
MODE0 LOAD
MODE1
1.0 kΩ
47 µH
47 pF
6.49 kΩ
Battery
SWC BUS
GND
4
33897 / A/C/T
Figure 9. 33897/A/C/T Typical Application Schematic
The 33897B/D do not have a control terminal to enable the
module’s regulator. See Figure 10. The 33897B/D can be
used in applications where board space is limited and there
is no need for the module to have control over its regulator via
the transceiver.
V_CC
V_CC
MCU
10 kΩ ^{2.7 kΩ}
100 nF
100 pF
Battery
4.7 µF
VBATT
TXD
BUS
RXD
MODE0 LOAD
MODE1
1.0 kΩ
47 µH
47 pF
6.49 kΩ
SWC BUS
33897/A/B/C/D/T
16
GND
33897B/D
Figure 10. 33897B/D Typical Application Schematic
Analog Integrated Circuit Device Data
Freescale Semiconductor