Datasheet
SGLS356 − MAY 2006
2
www.ti.com
DESCRIPTION
The SN65HVD230M controller area network (CAN) transceiver is designed for use with the Texas Instruments
TMS320Lx240x 3.3-V DSPs with CAN controllers, or with equivalent devices. They are intended for use in
applications employing the CAN serial communication physical layer in accordance with the ISO 11898
standard. Each CAN transceiver is designed to provide differential transmit capability to the bus and differential
receive capability to a CAN controller at speeds up to 1 Mbps.
Designed for operation in especially-harsh environments, these devices feature cross-wire protection,
loss-of-ground and overvoltage protection, overtemperature protection, as well as wide common-mode range.
The transceiver interfaces the single-ended CAN controller with the differential CAN bus found in industrial,
building automation, and automotive applications. It operates over a –2-V to 7-V common-mode range on the
bus and it can withstand common-mode transients of ±25 V.
On the SN65HVD230M, R
S
(pin 8) provides three different modes of operation: high-speed, slope control, and
low-power modes. The high-speed mode of operation is selected by connecting pin 8 to ground, allowing the
transmitter output transistors to switch on and off as fast as possible with no limitation on the rise and fall slopes.
The rise and fall slopes can be adjusted by connecting a resistor to ground at pin 8, since the slope is proportional
to the pin’s output current. This slope control is implemented with external resistor values of 10 kΩ, to achieve
a 15-V/µs slew rate, to 100 kΩ, to achieve a 2-V/µs slew rate.
The circuit of the SN65HVD230M enters a low-current standby mode during which the driver is switched off and
the receiver remains active if a high logic level is applied to R
S
(pin 8). The DSP controller reverses this
low-current standby mode when a dominant state (bus differential voltage > 900 mV typical) occurs on the bus.
The V
ref
(pin 5 on the SN65HVD230M) is available as a V
CC
/2 voltage reference.
AVAILABLE OPTIONS
FUNCTION
NUMBER
LOW
POWER MODE
INTEGRATED SLOPE
CONTROL
Vref PIN
’230 370-µA standby mode Yes Yes
PART NUMBER Q100 T
A
MARKED AS
SN65HVD230MDREP No −55°C to 125°C HV230M