CAN Transceiver
FEATURES
•Pin Compatible with PCA82C250 and DeviceNet, SDS, ISO11898 Compatible
•High Speed, up to 1Mbps
•Differential Transmit to the Bus and Receive from the Bus to the CAN Controller
•At Least 110 Nodes Can Be Connected
•100V Transient Protection on the Transmit Output
•24V Supply Cross Wire Protection on CANH and CANL
•No Bus Loading When Powered Down
•Operates over –40°C to +85°C
•Unitrode DeviceNet ID#107
UC5350
PRELIMINARY
DESCRIPTION
The UC5350 Control Area Network Transceiver is designed for industrial applications employing the CAN serial communications physical layer per ISO 11898 standard. The device is a high speed transceiver designed for use up to 1Mbps. Especially designed for hostile environments, this device features cross wire, loss of ground, over voltage, and over temperature protections well as a wide common mode range.
The transceiver interfaces the single ended CAN controller with the differential CAN bus found in industrial and automotive applications. It operates over the –7V to +12V common mode range of the bus and will withstand common mode transients of –25V to +18V as well as Schaffner tests. Performance features include high differential input impedance, a symmetrical differential signal driver and very low propogation delay that improves bus bandwidth and length by reducing reflection and distortion.
The transceiver operates over a wide temperature range, –40°C to +85°C and is available in 8-pin SOIC and Dual-in-Line packages.
FUNCTIONAL TABLE (VCC = 4.5V to 5.5V)
Inputs |
System Mode |
Output Mode |
|
Outputs |
||
TXD |
RS |
|
|
VCANH - VCANL |
|
RXD |
0 |
0 |
High Speed |
Dominant |
1.5V to 3V |
|
0 |
1 |
0 |
High Speed |
Recessive |
–120mV to +12mV |
|
1 |
High Z |
0 |
High Speed |
Recessive |
–120mV to +12mV |
|
1 |
X |
1 |
Standby |
|
High Z |
|
0 at Bus = Dominant |
|
|
|
|
|
|
1 at Bus = Recessive |
BLOCK DIAGRAM
UDG-96202
SLUS258A - MARCH 2000
ABSOLUTE MAXIMUM RATINGS
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to 9V TXD, RXD, VREF, RS . . . . . . . . . . . . . . . –0.3V to VCC + 0.3V CANL, CANH
0V < VCC < 5.5V. . . . . . . . . . . . . . . . . . . . . . . . –8V to +36V Non-Destructive, Non-Operative . . . . . . . . . . . . –8V to +32V Transient, Schaffner Test (Fig. 1) . . . . . . . . . –150 to +100V Operating Temperature . . . . . . . . . . . . . . . . . . –40°C to +85°C Storage Temperature . . . . . . . . . . . . . . . . . . . –65°C to +150°C Junction Temperature. . . . . . . . . . . . . . . . . . . –55°C to +150°C Lead Temperature (Soldering, 10 sec.) . . . . . . . . . . . . . +300°C Crosswire Protection Maximum VBUS . . . . . . . . . . . . . . . . 30V Bus Differential Voltage* . . . . . . . . . . . . . . . . . . . . . . . . . . . 30V Cross Wire Protection TA . . . . . . . . . . . . . . . . . –40°C to 125°C
UC5350
Currents are positive into, negative out of the specified terminal.
Consult Packaging Section of the Databook for thermal limitations and considerations of packages.
*Refers to Figures 9, 10, 11, 12 and 13.
CONNECTION DIAGRAM
DIL-8, SOIC-8 (Top View)
N, D Package
See Figure 7 for Pulse Timing |
UDG-96203-1 |
Figure 1. Schaffner Test
ELECTRICAL CHARACTERISTICS (Total Device) Unless otherwise stated, the device is disconnected from the bus line; VCC = 4.5V to 5.5V; 60 in parallel with 100pF load between CANH and CANL; TA = –40°C to +85°C, TA = TJ
PARAMETER |
TEST CONDITIONS |
MIN |
TYP |
MAX |
UNITS |
Supply Voltage |
|
4.5 |
|
5.5 |
V |
Supply Current |
Dominant, TXD = 1V |
|
|
70 |
mA |
|
Recessive, TXD = 4V |
|
9 |
14 |
mA |
|
Standby, RS = 4V |
|
1.2 |
2.0 |
mA |
RS Input Current |
|
–10 |
|
5 |
µ A |
RS Voltage Input = Logic 1 |
Standby |
0.75VCC |
|
|
V |
RS Voltage Input = Logic 0 |
High Speed |
|
|
0.3VCC |
V |
Transmitter Voltage Input = Logic 1 |
Transmitter Output Recessive |
0.7VCC |
|
|
V |
Transmitter Voltage Input = Logic 0 |
Transmitter Output Dominant |
|
|
0.3VCC |
V |
Transmitter Current Input at Logic 1 |
TXD = 4V |
|
|
30 |
µ A |
Transmitter Current Input at Logic 0 |
TXD = 1V |
–30 |
|
30 |
µ A |
Receiver Voltage Output = Logic 1 |
RXD = –100µ A, TXD = 4V |
VCC –1.25 |
|
|
V |
Receiver Voltage Output = Logic 0 |
RXD = 1mA, TXD = 1V |
|
0.75 |
1.2 |
V |
|
RXD = 10mA, TXD = 1V |
|
1.2 |
1.7 |
V |
CANH, CANL Input Resistance |
No Load, TXD = 4V |
20 |
40 |
|
kΩ |
Differential Input Resistance |
No Load, TXD = 4V |
40 |
80 |
|
kΩ |
CANH, CANL Input Capacitance |
(Note 1) |
|
|
20 |
pF |
Differential Input Capacitance |
(Note 1) |
|
|
10 |
pF |
Reference Output Voltage |
VREF = ± 50µ A |
0.45VCC |
|
0.55VCC |
V |
Note 1: Guaranteed by design. Not 100% tested in production.
2
Loading...