Datasheet

DESCRIPTION (CONTINUED)
SN65HVD233
SN65HVD234
SN65HVD235
SLLS557F – NOVEMBER 2002 – REVISED AUGUST 2008 .............................................................................................................................................. www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
If the common-mode range is restricted to the ISO-11898 Standard range of – 2 V to 7 V, up to 120 nodes may
be connected on a bus. These transceivers interface the single-ended CAN controller with the differential CAN
bus found in industrial, building automation, and automotive applications.
The R
S
, pin 8 of the SN65HVD233, SN65HVD234, and SN65HVD235 provides for three modes of operation:
high-speed, slope control, or low-power standby mode. The high-speed mode of operation is selected by
connecting pin 8 directly to ground, allowing the driver output transistors to switch on and off as fast as possible
with no limitation on the rise and fall slope. The rise and fall slope can be adjusted by connecting a resistor to
ground at pin 8, since the slope is proportional to the pin ' s output current. Slope control is implemented with a
resistor value of 10 k Ω to achieve a slew rate of 915 V/ µ s and a value of 100 k Ω to achieve 9 2.0 V/ µ s slew rate.
For more information about slope control, refer to the application information section.
The SN65HVD233, SN65HVD234, and SN65HVD235 enter 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 pin 8. The local protocol controller
reverses this low-current standby mode when it needs to transmit to the bus.
A logic high on the loopback LBK pin 5 of the SN65HVD233 places the bus output and bus input in a
high-impedance state. The remaining circuit remains active and available for driver to receiver loopback,
self-diagnostic node functions without disturbing the bus.
The SN65HVD234 enters an ultralow-current sleep mode in which both the driver and receiver circuits are
deactivated if a low logic level is applied to EN pin 5. The device remains in this sleep mode until the circuit is
reactivated by applying a high logic level to pin 5.
The AB pin 5 of the SN65HVD235 implements a bus listen-only loopback feature which allows the local node
controller to synchronize its baud rate with that of the CAN bus. In autobaud mode, the driver ' s bus output is
placed in a high-impedance state while the receiver ' s bus input remains active. For more information on the
autobaud mode, refer to the application information section.
AVAILABLE OPTIONS
(1)
SLOPE DIAGNOSTIC AUTOBAUD
PART NUMBER LOW POWER MODE
CONTROL LOOPBACK LOOPBACK
SN65HVD233D 200- µ A standby mode Adjustable Yes No
SN65HVD234D 200- µ A standby mode or 50-nA sleep mode Adjustable No No
SN65HVD235D 200- µ A standby mode Adjustable No Yes
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
ORDERING INFORMATION
PACKAGE (D) Marked as
SN65HVD233D
VP233
SN65HVD233DR
(1)
SN65HVD234D
VP234
SN65HVD234DR
(1)
SN65HVD235D
VP235
SN65HVD235DR
(1)
(1) R suffix indicates tape and reel.
2 Submit Documentation Feedback Copyright © 2002 – 2008, Texas Instruments Incorporated
Product Folder Link(s): SN65HVD233 SN65HVD234 SN65HVD235