PIN CONNECTIONS
1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
TX
V1
RX
RST
INT
GND
GND
GND
GND
MISO
MOSI
SCLK
CS
V3
2
VBAT
RTL
V2
3
4
5
CANH
GND
GND
GND
GND
CANL
RTH
NC
6
7
8
9
10
11
12
13
14
L0
L1
L2
Table 2. 33389 Pin Definitions: SOICW 28-Lead
A functional description of each pin can be found in the Functional Pin Description section beginning on page 17.
Pin
Name
Pin Number
Formal Name
Definition
Transmitter input of the LS CAN interface
Transmitter Data
1
2
TX
V1
Voltage Regulator
One
This 5.0 V pin is a 3% low drop voltage regulator dedicated to the microcontroller supply.
Receiver Data
Reset
Receiver output of the LS CAN interface
3
RX
RST
INT
This is an Input/Output pin.
4
Interrupt
Ground
This output is asserted LOW when an enabled interrupt condition occurs.
5
These device ground pins are internally connected to the package lead frame to provide
a 33389-to-PCB thermal path.
6 -9 20 - 23
GND
Master In/Slave Out
Master Out/Slave In
System Clock
This pin is the tri-state output from the shift register.
This pin is for the input of serial instruction data.
10
11
MISO
MOSI
SCLK
CS
This pin clocks the internal shift registers.
12
Chip Select
This pin communicates with the system MCU and enables SPI communication.
13
Wake-up Input
(L0: L2)
Input interfaces to external circuitry. Levels at these pins can be read by SPI and input
can be used as programmable wake-up input in Sleep or Stop mode.
14, 15, 16
L0: L2
No Connect
This pin does not connect.
17
18
NC
Thermal Resistance
High
Pin for the connection of the bus termination to CANH
RTH
CAN Low
CAN High
CAN low input/output
19
24
25
CANL
CANH
V2
CAN high input/output
Voltage Regulator
Two
This 5.0 V pin is a low drop voltage regulator dedicated to the peripherals supply.
Thermal Resistance
Low
Pin for the connection of the bus termination to CANL
This pin is voltage supply from the battery.
26
RTL
Voltage Battery
27
28
VBAT
V3
Voltage Regulator
Three
This pin is a 10 Ω switch to V
, used to supply external contacts or relays.
BAT
33389
Analog Integrated Circuit Device Data
Freescale Semiconductor
5
FREESCALE [ Freescale ]
