参数资料
型号: MC33742EP
厂商: Freescale Semiconductor
文件页数: 53/71页
文件大小: 0K
描述: IC SYSTEM BASE W/CAN 48-QFN
标准包装: 260
应用: 自动
接口: SPI
电源电压: 5.5 V ~ 18 V
封装/外壳: 48-VFQFN 裸露焊盘
供应商设备封装: 48-QFN-EP(7x7)
包装: 托盘
安装类型: 表面贴装
Analog Integrated Circuit Device Data
Freescale Semiconductor
57
33742
TYPICAL APPLICATIONS
TYPICAL APPLICATIONS
SBC POWER SUPPLY
The 33742 is supplied from the battery line. A serial diode is necessary to protect the device against negative transient pulses
and from reverse battery. This is illustrated in Figure 31.
Figure 31. SBC Typical Application Schematic
VOLTAGE REGULATOR
The SBC contains two 5.0 V regulators: a V1 regulator, fully integrated and protected, and a V2 regulator, which operates with
an external ballast transistor.
VDD REGULATOR
The VDD regulator provides 5.0 V output, 2.0% accuracy with current capability of 200 mA max. It requires external decoupling
and stabilizing capacitors. The minimum recommended values are as follows:
C4: 100 nF
C3: 10
F < C3 <22 F, ESR < 1.0 or
C3: 22
F < C3 <47 F, ESR < 5.0 or
Programmable
SPI Interface
Dual Voltage Regulator
GND
RXD
TXD
VSUP Monitor
VDD Monitor
HS
Mode Control
Reset
Watchdog
Wake-up Input
1.0 Mbps CAN
Physical Interface
CS
MISO
SCLK
MOSI
RST
INT
5.0V/200mA
V2CTRL
VDD
L0
HS
CANL
CANH
Oscillator
V2
WDOG
VSUP
L1
L2
L3
Control
Interrupt
VPWR
Q1
C3
C4
C2
C1
C6
to L1
R1
C8
to L2
R3
MCU
Safe Circuitry
D1
C5
Rp
Rd
C7
to L1
R2
C9
to L3
R4
Rd
Internal
Connector
Clamp (1)
SW4
SW3
SW2
SW1
C10
Module
Supply
Legend
D1: Example: 1N4002 type
Q1: MJD32C
R1, R2, R3, R4: 10k
Rp, Rd: Example: 1.0k
depending on switch type.
R5: 2.2 k
C1: 10
F
C2: 100 nF
C3: 47
F
C4: 100 nF
C5: 47
F tantalum or 100 F chemical
C6, C7, C8, C9, C10: 100 nF
(1) Clamp circuit to ensure max ratings for HS (HS from
-0.3V to VSUP + 0.3) are respected.
R5
33742
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