CAN Board - Datasheet
Table Of Contents
- FEATURES
- APPLICATIONS
- DESCRIPTION
- Function Tables
- Terminal Functions
- equivalent input and output schematic diagrams
- absolute maximum ratings over operating free-air temperature (see Note \ 1) (unless otherwise noted) †
- recommended operating conditions
- ELECTRICAL SPECIFICATIONS
- driver electrical characteristics over recommended operating conditions \ (unless otherwise noted)
- driver switching characteristics over recommended operating conditions(\ unless otherwise noted)
- receiver electrical characteristics over recommended operating condition\ s (unless otherwise noted)
- receiver switching characteristics over recommended operating conditions\ (unless otherwise noted)
- device switching characteristics over recommended operating conditions (\ unless otherwise noted)
- device control-pin characteristics over recommended operating conditions\ (unless otherwise noted)
- PARAMETER MEASUREMENT INFORMATION
- TYPICAL CHARACTERISTICS
- APPLICATION INFORMATION
- MECHANICAL DATA
- IMPORTANT NOTICE
SN65HVD230
SN65HVD231
SN65HVD232
SLOS346G – MARCH 2001 – REVISED JUNE 2002
22
www.ti.com
APPLICATION INFORMATION
high-speed (continued)
1
1 Mbps
Driver Output
NRZ Data
Figure 31. Typical High Speed SN65HVD230 Output Waveform Into a 60-Ω Load
slope control
Electromagnetic compatibility is essential in many applications using unshielded bus cable to reduce system
cost. To reduce the electromagnetic interference generated by fast rise times and resulting harmonics, the rise
and fall slopes of the SN65HVD230 and SN65HVD231 driver outputs can be adjusted by connecting a resistor
from R
S
(pin 8) to ground or to a logic low voltage, as shown in Figure 32. The slope of the driver output signal
is proportional to the pin’s output current. This slope control is implemented with an external resistor value of
10 kΩ to achieve a ≈ 15 V/µs slew rate, and up to 100 kΩ to achieve a ≈ 2.0 V/µs slew rate as displayed in
Figure 33. Typical driver output waveforms from a pulse input signal with and without slope control are displayed
in Figure 34. A pulse input is used rather than NRZ data to clearly display the actual slew rate.
TMS320LF2406
or
TMS320LF2407
IOPF6
1
2
3
4
8
7
6
5
D
GND
V
CC
R
CANH
CANL
V
ref
10 kΩ
to
100 kΩ
R
S
Figure 32. Slope Control/Standby Connection to a DSP