Datasheet

TMS320Lx2403/6/7
CAN Bus Line
CAN-Controller
CANTX/IOPC6
SN65HVD230
Electronic Control Unit (ECU)
CANH CANL
D R
CANRX/IOPC7
CANH
CANL
CAN Bus Line
ECU ECU ECU
1 2 n
120 Ω120 Ω
SN65HVD230
SN65HVD231
SN65HVD232
www.ti.com SLOS346K –MARCH 2001– REVISED FEBRUARY 2011
Figure 28. Details of a Typical CAN Node
Figure 29. Typical CAN Network
The SN65HVD230/231/232 3.3-V CAN transceivers provide the interface between the 3.3-V TMS320Lx2403/6/7
CAN DSPs and the differential bus line, and are designed to transmit data at signaling rates up to 1 Mbps as
defined by the ISO 11898 standard.
FEATURES of the SN65HVD230, SN65HVD231, and SN65HVD232
The SN65HVD230/231/232 are pin-compatible (but not functionally identical) with one another and, depending
upon the application, may be used with identical circuit boards.
These transceivers feature 3.3-V operation and standard compatibility with signaling rates up to 1 Mbps, and also
offer 16-kV HBM ESD protection on the bus pins, thermal shutdown protection, bus fault protection, and
open-circuit receiver failsafe. The fail-safe design of the receiver assures a logic high at the receiver output if the
bus wires become open circuited. If a high ambient operating environment temperature or excessive output
current result in thermal shutdown, the bus pins become high impedance, while the D and R pins default to a
logic high.
The bus pins are also maintained in a high-impedance state during low V
CC
conditions to ensure glitch-free
power-up and power-down bus protection for hot-plugging applications. This high-impedance condition also
means that an unpowered node does not disturb the bus. Transceivers without this feature usually have a very
low output impedance. This results in a high current demand when the transceiver is unpowered, a condition that
could affect the entire bus.
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Product Folder Link(s): SN65HVD230 SN65HVD231 SN65HVD232