33897 Datasheet, PDF (5/21 Pages) Freescale Semiconductor, Inc – Single Wire CAN Transceiver

PIN CONNECTIONS
PIN CONNECTIONS
GND
TXD
MODE0
MODE1
RXD
NC
GND
33897/A/C/T
1
14
2
13
3
12
4
11
5
10
6
9
7
8
GND
NC
BUS
LOAD
VBATT
CNTL
GND
TXD
MODE0
MODE1
RXD
33897B/D
1₁
88
2₂
77
33
66
44
55
GND
BUS
LOAD
VBATT
Figure 4. 33897/A/B/C/D/T Pin Connections
Table 2. Pin Definitions
A functional description of each terminal can be found in the Functional Pin Description section, beginning on page 13.
33897/A/C/T
Terminal
33897B/D
Terminal
Pin Name
Formal Name
Definition
1, 7, 8, 14
8
GND
Ground
Electrical Common Ground and Heat removal. A good thermal path
will also reduce the die temperature.
2
1
TXD
Transmit Data
Data input here will appear on the BUS terminal. A logic [0] will assert
the bus, a logic [1] will make the bus go to the recessive state.
3, 4
2, 3
MODE0,
Mode Control
These Pins control Sleep Mode, Transmit Level, and Speed. They
MODE1
have weak pulldowns.
5
4
RXD
Receive Data
Open drain output of the data on BUS. A recessive bus = a logic [1], a
dominant bus = logic [0]. An external pullup is required.
6, 13
–
NC
No Connect
No internal connection to these Pins. Pin 13 can be connected to GND
to allow the use of the 14-terminal or 8-terminal device. ⁽¹⁾
9
–
CNTL
Control
Provides a battery-level logic signal.
10
5
VBATT
Battery
Power input. An external diode is needed for reverse battery
protection.
11
6
LOAD
Load
The external bus load resistor connects here to prevent bus pullup in
the event of loss of module ground.
12
7
BUS
Bus
This terminal connects to the bus through external components.
Notes
1. Module boards can be planned for the 14-terminal package and still use the 8-terminal package.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33897/A/B/C/D/T
5