33742 datasheet(52/65 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

33742

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

Programmable

SPI Interface

Dual Voltage Regulator

GND

RXD

TXD

VSUP Monitor

VDD Monitor

Mode Control

Reset

Watchdog

Wake-Up Input

1.0 Mbps CAN

Physical Interface

MISO

SCLK

MOSI

RST

INT

5.0 V/200 mA

V2CTRL

VDD

CANL

CANH

Oscillator

WDOG

VSUP

Control

Interrupt

VPWR

to L1

to L2

MCU

Safe Circuitry

to L1

to L3

Internal

Connector

Clamp (1)

SW4

SW3

SW2

SW1

C10

Module

Supply

Legend

D1: Example: 1N4002 type

Q1: MJD32C

R1, R2, R3, R4: 10 k

Ω

Rp, Rd: Example: 1.0 k

Ω depending on switch type.

R5: 2.2 k

Ω

C1: 10

µF

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 VSUP + 0.3) are respected.

33742

33742 数据表(PDF) 52 Page - Freescale Semiconductor, Inc

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