mc33742 Freescale Semiconductor, Inc, mc33742 Datasheet - Page 52

• Manufacturer Part Number: mc33742
• Description: Mc33742 System Basis Chip Sbc With Enhanced High-speed Can Transceiver
• Manufacturer: Freescale Semiconductor, Inc

SBC POWER SUPPLY
and from reverse battery. This is illustrated in Figure 31.
52
33742
TYPICAL APPLICATIONS
The 33742 is supplied from the battery line. A serial diode is necessary to protect the device against negative transient pulses
SW2
SW3
SW4
SW1
V
PWR
Connector
Rp
Rp
Rd
Rd
Legend
D1: Example: 1N4002 type
Q1: MJD32C
R1, R2, R3, R4: 10 kΩ
Rp, Rd: Example: 1.0 kΩ depending on switch type.
R5: 2.2 kΩ
C1: 10 µF
R2
R1
R3
R4
C7
C6
C8
C9
to L1
to L1
to L2
to L3
Clamp (1)
Figure 31. SBC Typical Application Schematic
C1
D1
Internal
Module
Supply
TYPICAL APPLICATIONS
CANH
V
CANL
SUP
C2
HS
L0
L1
L2
L3
Programmable
Wake-Up Input
Dual Voltage Regulator
Control
VSUP Monitor
HS
VDD Monitor
Physical Interface
C2: 100 nF
C3: 47 µF
C4: 100 nF
C5: 47 µF tantalum or 100 µF chemical
C6, C7, C8, C9, C10: 100 nF
(1) Clamp circuit to ensure max ratings for HS (HS from
- 0.3 V to V
1.0 Mbps CAN
33742
SUP
Mode Control
SPI Interface
Watchdog
Oscillator
Interrupt
+ 0.3) are respected.
Reset
5.0 V/200 mA
Analog Integrated Circuit Device Data
V2CTRL
V2
C3
INT
WDOG
RST
MOSI
SCLK
MISO
CS
TXD
RXD
GND
R5
Freescale Semiconductor
Safe Circuitry
Q1
VDD
C4
C10
MCU
C5
V2