MAX13051ASA Maxim Integrated Products, MAX13051ASA Datasheet - Page 10

• Manufacturer Part Number: MAX13051ASA
• Description: Network Controller & Processor ICs
• Manufacturer: Maxim Integrated Products

Specifications of MAX13051ASA

• Product: Controller Area Network (CAN)
• Number Of Transceivers: 1
• Data Rate: 1 Mbps
• Supply Voltage (max): 5.25 V
• Supply Voltage (min): 4.75 V
• Supply Current (max): 72 mA
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC-8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

rates of up to 500kbps. This reduces the effects of EMI,
thus allowing the use of unshielded-twisted or parallel
cable. The MAX13050/MAX13052 and MAX13054 stand-
by mode shuts off the transmitter and switches the
receiver to a low-current/low-speed state.
The MAX13050/MAX13052/MAX13053/MAX13054 input
common-mode range is greater than ±12V, exceeding
the ISO11898 specification of -2V to +7V, and feature
±8kV Contact Discharge protection, making these
devices ideal for harsh automotive and industrial envi-
ronments.
The MAX13050/MAX13052/MAX13053/MAX13054 fea-
ture ±80V fault protection. This extended voltage range
of CANH, CANL, and SPLIT allows use in high-voltage
systems and communication with high-voltage buses.
The MAX13050/MAX13052/MAX13053/MAX13054 can
achieve transmission rates of up to 1Mbps when oper-
ating in high-speed mode. Drive STBY low to operate
the MAX13050 and MAX13054 in high-speed opera-
tion. Connect RS to ground to operate the MAX13052 in
high-speed mode.
Connect a resistor from RS to ground to select slope-
control mode (Table 1). In slope-control mode, CANH
and CANL slew rates are controlled by the resistor
(16kΩ ≤ R
GND. Controlling the rise and fall slopes reduces high-
frequency EMI and allows the use of an unshielded-
twisted pair or a parallel pair of wires as bus lines. The
slew rate can be approximated using the formula below:
where, SR is the desired slew rate and R
In standby mode (RS or STBY = high), the transmitter is
switched off and the receiver is switched to a low-cur-
rent/low-speed state. The supply current is reduced
during standby mode. The bus line is monitored by a
low-differential comparator to detect and recognize a
wake-up event on the bus line. Once the comparator
detects a dominant bus level greater than t
pulls low.
Industry-Standard High-Speed CAN
Transceivers with ±80V Fault Protection
10
Standby Mode (MAX13050/MAX13052/MAX13054)
______________________________________________________________________________________
RS
≤ 200kΩ) connected between RS and
SR V
Slope-Control Mode (MAX13052)
( /
µ =
s
)
±80V Fault Protected
R
250
RS
Operating Modes
High-Speed Mode
RS
is in kΩ.
WAKE
, RXD
Drive STBY high for standby mode operation for the
MAX13050 and MAX13054. Apply a logic-high to RS to
enter a low-current standby mode for the MAX13052.
Drive S high to place the MAX13053 in silent mode.
When operating in silent mode, the transmitter is dis-
abled regardless of the voltage level at TXD. RXD how-
ever, still monitors activity on the bus line.
SPLIT provides a DC common-mode stabilization volt-
age of 0.5 x V
SPLIT stabilizes the recessive voltage to 0.5 x V
conditions when the recessive bus voltage is lowered,
caused by an unsupplied transceiver in the network
with a significant leakage current from the bus lines to
ground. Use SPLIT to stabilize the recessive common-
mode voltage by connecting SPLIT to the center tap of
the split termination, see the Typical Operating Circuit.
In standby mode or when V
high impedance.
MAX13053 has a reference voltage output (REF) set to
0.5 x V
CAN controller’s differential comparator, and to provide
power to external circuitry.
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 CAN transceivers provide a transmitter dominant
timeout function that prevents erroneous CAN controllers
from clamping the bus to a dominant level by a continu-
ous low TXD signal. When the TXD remains low for the
1ms maximum timeout period, the transmitter becomes
disabled, thus driving the bus line to a recessive state
Table 1. Mode Selection Truth Table
MAX13052
CONDITION FORCED
0.4 x V
V
V
RS
RS
or ≤ 0.3 x V
≥ 0.75 x V
CC
CC
AT RS
x V
Common-Mode Stabilization (SPLIT)
≤ V
. REF can be utilized to bias the input of a
CC
RS
≤ 0.6
CC
CC
CC
Reference Output (MAX13053)
when operating in normal mode.
Slope Control
High-Speed
Standby
TXD Dominant Timeout
MODE
Silent Mode S (MAX13053)
CC
= 0, SPLIT becomes
10µA ≤ |I
CURRENT AT RS
RESULTING
|I
Transmitter
|I
RS
RS
| ≤ 500µA
| ≤ 10µA
RS
| ≤ 200µA
CC
for