Philips Semiconductors

Product data

AU5790

Single wire CAN transceiver

2001 May 18

13

APPLICATION INFORMATION

The information in this section is not part of the IC specification, but is presented for information purposes only. Additional information on single

wire CAN networks, application circuits, and thermal management are included in application note AN2005.

SL01200

CAN BUS LINE

TX0

RX0

TxD

RxD

BAT

AU5790

TRANSCEIVER

EN

NSTB

CANH

+12V

PORT

GND

PORT

+5V

2.4 to

2.7k

Ω

9.1k

Ω,

1%

CAN CONTROLLER

(e.g. SJA1000)

Note 1

TX0 should be configured to push-pull operation, active low; e.g., Output Control Register = 1E hex.

Note 2

220 pF

47

µH

RTH

10%

100 nF

1N5060

or equiv.

L

1 to 4.7

µF

Figure 4.

Application circuit example for the AU5790

AU5790 transceivers may require additional PCB surface at ground pin(s) as heat conductor(s) in order to meet thermal requirements. See

thermal characteristics section for details.

Table 2. Maximum CAN Bit Rate

MODE

MAXIMUM BIT RATE AT 0.35% CLOCK ACCURACY

Normal transmission

33.3 kbps

High-speed transmission

83.3 kbps

Sample point as % of bit time

85%

Bus Time constant, normal mode

1.0 to 4.0

µs