MCP2025

DS20002306B-page 12

 2012-2014 Microchip Technology Inc.

1.6

Typical Applications

FIGURE 1-7:

TYPICAL APPLICATION CIRCUIT

FIGURE 1-8:

TYPICAL LIN NETWORK CONFIGURATION

LIN Bus

VBB

LBUS

VREG

TXD

RXD

VSS

VDD

TXD

RXD

VBAT

CBAT

CREG

CS/LWAKE

I/O

43V

1k



VBB

Master Node Only

VBAT

220 k



Wake-Up

RTP

RESET

RESET

VSS

(3)

(5)

Note 1:

CREG, the load capacitor, should be ceramic or tantalum rated for extended temperatures, 1.0-22 µF. See

Figure 2-1 to select the correct ESR.

2:

CBAT is the filter capacitor for the external voltage supply. Typically 10 x CREG, with no ESR restriction. See

Figure 1-6 to select the minimum recommended value for CBAT. The RTP value is added to the line resistance.

3:

This diode is only needed if CS/LWAKE is connected to the VBAT supply.

4:

ESD protection diode.

5:

This component is for additional load dump protection.

6:

An external 10 kΩ resistor is recommended for some applications.

100 nF

220 pF

MMBZ27V (4)

LIN bus

MCP2025

1k



VBB

40m

+ Return

LIN bus

LIN bus

MCP205X

LIN bus

MCP202XA

LIN bus

MCP2003

Slave 1

(MCU)

Slave 2

(MCU)

Slave n <16

(MCU)

Master

(MCU)

(6)