MAX13051ESA+T Maxim Integrated Products, MAX13051ESA+T Datasheet - Page 9
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MAX13051ESA+T
Manufacturer Part Number
MAX13051ESA+T
Description
IC TRANSCEIVER CAN 8-SOIC
Manufacturer
Maxim Integrated Products
Type
Transceiverr
Datasheet
1.MAX13051ESAT.pdf
(12 pages)
Specifications of MAX13051ESA+T
Number Of Drivers/receivers
1/1
Protocol
CAN
Voltage - Supply
4.75 V ~ 5.25 V
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Table 1. Mode Selection Truth Table
Table 2. Transmitter and Receiver Truth Table when Not Connected to the Bus
*Common-mode input resistance.
Figure 4. MAX13051 Autobaud Timing Diagram
The transmitter converts a single-ended input (TXD)
from the CAN controller to differential outputs for the
bus lines (CANH, CANL). The truth table for the trans-
mitter and receiver is given in Table 2.
The MAX13051 provides a transmitter-dominant timeout
that prevents erroneous CAN controllers from clamping
the bus to a dominant level by maintaining a continuous
low TXD signal. When the TXD remains in the dominant
state for greater than 1ms (max), the transmitter
becomes disabled, driving the bus line to a recessive
state (Figure 5). After a dominant timeout fault, the
V
0.4V x V
V
RS
RS
High or Float
CONDITION FORCED AT PIN RS
≤ 0.3V x V
≥ 0.75V x V
TXD
Low
CC
X
< V
CC
RS
CC
≤ 0.6V x V
_______________________________________________________________________________________
V
V
V
±80V Fault-Protected Can Transceiver
RS
RS
RS
CC
≥ 0.75V x V
≤ 0.75V x V
≤ 0.75V x V
RS
AUTOBAUD
CANH - CANL
TXD Dominant Timeout
RXD
TXD
RXD
TXD
CC
CC
CC
Transmitter
R
ICM
V
CANH
High
CC
GND
Slope Control
/ 2
High Speed
Standby
MODE
MAX13051’s transmitter becomes enabled upon
detecting a rising edge at TXD.
The receiver reads differential inputs from the bus lines
(CANH, CANL) and transfers this data as a single-
ended output (RXD) to the CAN controller. It consists of
a comparator that senses the difference, V
(CANH - CANL), with respect to an internal threshold of
0.7V. If this difference is positive, (V
logic-low is present at RXD. If negative, (V
a logic-high is present. The receiver always echoes the
CAN bus data when not operating in autobaud mode.
R
ICM
V
CANL
CC
Low
GND
/ 2
200µA ≤
10µA ≤
|
I
RS
TRANSMITTER
INPUT
RECEIVER
OUTPUT
with Autobaud
|
BUS STATE
RESULTING CURRENT AT RS
≤ 10µA
Recessive
Recessive
Dominant
|
I
|
RS
I
RS
|
|
≤ 200µA
≤ 500µA
DIFF
DIFF
Receiver
RXD
High
High
Low
> 0.9V), a
< 0.5V),
DIFF
9
=