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MAX13020
User Manual
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MAXIM MAX13020, MAX13021 User Manual

General Description
The MAX13020/MAX13021 ±60V fault-protected low­power local interconnect network (LIN) transceivers are ideal for use in automotive network applications where high reliability is required. The devices provide the interface between the LIN master/slave protocol con­troller, and the physical bus described in the LIN 2.0 specification package and SAE J2602 specification. The devices are intended for in-vehicle subnetworks with a single master and multiple slaves.
The extended fault-protected voltage range of ±60V on the LIN bus line allows for use in +12V, +24V, and +42V automotive applications. The devices allow com­munication up to 20kbaud, and include slew-rate limit­ed transmitters for enhanced electromagnetic emissions (EME) performance. The devices feature a low-power 4µA sleep mode and provide wake-up source detection.
The MAX13020 is a pin-to-pin replacement and is func­tionally compatible with the Philips TJA1020. The MAX13021 includes enhanced bus dominant clamping fault management for reduced quiescent current during LIN bus shorts to GND. The MAX13020/MAX13021 are available in the 8-pin SO package, and operate over the -40°C to +125°C automotive temperature range.
Applications
+12V/+42V Automotive
+24V Heavy Truck and Bus
Features
♦ MAX13020 is a Pin-to-Pin Upgrade for TJA1020 ♦ ESD Protection
±12kV Human Body Model (LIN) ±4kV Contact Discharge (LIN, NWAKE, BAT)
♦ LIN 2.0/SAE J2602 Compatible ♦ Slew-Rate Limited Transmitter for Low
Electromagnetic Emissions (EME)
♦ Robust Electromagnetic Immunity (EMI) ♦ Passive Behavior in Unpowered State ♦ TXD Dominant Timeout Function ♦ LIN Bus Dominant Management (MAX13021 Only) ♦ Input Levels Compatible with +3.3V and +5V
Controllers
♦ Integrated 30kΩ Termination Resistor for Slave
Applications
♦ Low 4µA Sleep Mode with Local and Remote
Wake-Up Detection
♦ Wake-Up Source Recognition ♦ Thermal Shutdown
MAX13020/MAX13021
±60V Fault-Protected LIN Transceivers
________________________________________________________________ Maxim Integrated Products 1
19-0559; Rev 1; 6/06
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Ordering Information
PART
L IN B U S
D O M IN A N T
PIN-
PACKAGE
CODE
MAX13020ASA+
— 8 SO S8-5
MAX13021ASA+
Yes 8 SO S8-5
BAT
TXD
RXD
NSLP
LIN
GND
INH
NWAKE
MICROCONTROLLER
LIN BUS
1kΩ
V
BAT
MASTER NODE
ONLY
+5V LDO
*
EN
MAX5023
MAX13020 MAX13021
*OPTIONAL TXD PULLUP RESISTOR FOR READING WAKE-UP SOURCE FLAG
Typical Operating Circuit
Note: All devices are specified over the -40°C to +125°C auto­motive temperature range. +Denotes lead-free package.
Pin Configuration appears at end of data sheet.
M A N A G EM EN T
PACKAGE
MAX13020/MAX13021
±60V Fault-Protected LIN Transceivers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
(All voltages referenced to GND, unless otherwise noted. Positive currents flow into the device.)
BAT.........................................................................-0.3V to +40V
TXD, RXD, NSLP.......................................................-0.3V to +7V
LIN ...........................................................0V to ±60V Continuous
LIN to BAT..........................................................-80V Continuous
NWAKE...................................................................-0.3V to +80V
NWAKE Current (NWAKE < -0.3V) ....................................-15mA
INH ..............................................................-0.3V to V
BAT
+ 0.3V
INH Current .......................................................-50mA to +15mA
Continuous Power Dissipation
8-Pin SO (derate 5.9mW/°C above +70°C)...................471mW
Operating Temperature Range .........................-40°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s) ................................+300°C
ELECTRICAL CHARACTERISTICS
(V
BAT
= +5V to +38V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at V
BAT
= +12V and TA= +25°C. Positive
currents flow into the device.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
BAT Supply Voltage V
BAT
Operating range 5.0
V
V
BAT
= +27V,
V
LIN
= V
BAT
148
Sleep mode, V
NWAKE
= V
BAT,
V
BAT
= +38V,
V
LIN
= V
BAT
8
Standby mode, bus recessive, V
BAT
= +5V to +27V,
V
LIN
= V
INH
= V
NWAKE
= V
BAT,
V
TXD
= V
NSLP
= GND
Standby mode, bus dominant, V
BAT
= +12V, V
INH
= V
NWAKE
= V
BAT,
V
LIN
= V
TXD
= V
NSLP
= GND
Normal/low slope mode, bus recessive, V
BAT
= +5V to +27V,
V
LIN
= V
INH
= V
NWAKE
= V
BAT,
V
TXD
= V
NSLP
= +5V
µA
Normal/low slope mode, bus dominant, no load, V
BAT
= V
INH
= V
NWAKE
= +12V,
V
TXD
= GND, V
NSLP
= +5V
1 4.5 8 mA
Sleep mode, bus dominant, V
BAT
= V
NWAKE
= +12V,
V
LIN
= V
TXD
= V
NSLP
= GND
90
Fault mode, bus dominant (MAX13021), V
INH
= V
NWAKE
= V
BAT
,
V
LIN
= GND, V
NSLP
= +5V
30 60
BAT Supply Current I
BAT
Disable mode, bus dominant (MAX13021),
20 30
µA
38.0
V
TXD
= V
NSLP
= GND
V
= V
BA T
IN H
= V
N WAK E
= + 12V , V
= G N D
LI N
100 650 1000
300 1000 2000
100 650 1000
MAX13020/MAX13021
±60V Fault-Protected LIN Transceivers
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
BAT
= +5V to +38V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at V
BAT
= +12V and TA= +25°C. Positive
currents flow into the device.)
PARAMETER SYMBOL CONDITIONS
UNITS
TRANSMITTER DATA INPUT (TXD)
High-Level Input Voltage V
IH
Output recessive 2 V
Low-Level Input Voltage V
IL
Output dominant 0.8 V
Pulldown Resistance R
TXD
kΩ
Low-Level Input Current I
IL
V
TXD
= GND -5 0 +5 µA
Low-Level Output Current I
OL
Standby mode, V
NWAKE
= GND,
V
LIN
= V
BAT
, V
TXD
= +0.4V,
local wake-up request
1.5 6 mA
RECEIVER DATA OUTPUT (RXD)
Low-Level Output Current I
OL
V
LIN
= GND, V
RXD
= +0.4V 1.2 4.1 mA
High-Level Leakage Current I
LH
Normal/low slope mode, V
LIN
= V
BAT
, V
RXD
= +5V
-5 0 +5 µA
NSLP INPUT
High-Level Input Voltage V
IH
2V
Low-Level Input Voltage V
IL
0.8 V
Pulldown Resistance R
NSLP
V
NSLP
= +5V
kΩ
Low-Level Input Current I
IL
V
NSLP
= GND -5 0 +5 µA
NWAKE INPUT
High-Level Input Voltage V
IH
V
BAT
- 1.0 V
Low-Level Input Voltage V
IL
V
NWAKE Pullup Current I
IL
V
NWAKE
= GND -30
-3 µA
High-Level Leakage Current I
LH
V
NWAKE
= +38V, V
BAT
= +38V -5 0 +5 µA
INH OUTPUT
Switch On-Resistance Between BAT and INH
R
SW
S tand b y, nor m al /l ow sl op e m od es, I
IN H
=
- 15m A, V
BAT
= + 12V
22 50 Ω
High-Level Leakage Current I
LH
Sleep mode, V
NWAKE
= +38V, V
BAT
= +38V
-5 0 +5 µA
LIN BUS I/O
LIN Recessive Output Voltage
)
V
TXD
= +5V, I
LIN
= -1µA V
BAT
-1.0V V
LIN Dominant Output Voltage V
O(DOM)
Normal/low slope mode, V
TXD
= GND, V
BAT
= +7V to +27V,
R
TERM
= 500Ω to BAT
V
MIN TYP MAX
125 330 800
125 330 800
-10
V
V
O(RECES
0.2 x V
BAT
- 3.3
BAT
MAX13020/MAX13021
±60V Fault-Protected LIN Transceivers
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
BAT
= +5V to +38V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at V
BAT
= +12V and TA= +25°C. Positive
currents flow into the device.)
PARAMETER SYMBOL CONDITIONS
MIN
TYP
MAX
UNITS
High-Level Leakage Current I
LH
V
LIN
= V
BAT
, V
TXD
= +5V -5 0 +5 µA
Device Leakage Current, V
BAT
Disconnected
I
L(BAT)
V
BAT
= GND, V
LIN
= +18V -5 0 +5 µA
Device Leakage Current, GND Disconnected
I
L(GND)
V
BAT
= GND, V
LIN
= -18V
0µA
LIN Current After Short Detection
I
IL(FAULT)
Fault mode, disable mode (MAX13021) V
LIN
= GND
-10 -2 µA
Short-Circuit Recovery Threshold Voltage
)
Fault mode, disable mode (MAX13021)
V
BAT
-
2.5
V
BAT
-
0.9
V
LIN Pullup Current I
IL
-10 -2 µA
Slave Termination Resistance to V
BAT
R
SLAVE
S tand b y, nor m al /l ow sl op e m od es, V
LIN
=
GN D , V
BAT
= + 12V
20 30 47 kΩ
V
LIN
= V
BAT
= +12V,
V
TXD
= GND, t < t
DOM
27 40 60
V
LIN
= +12V, V
BAT
= +27V,
V
TXD
= GND, t < t
DOM
(Note 1)
45 70 100
Short-Circuit Output Current I
O(SC)
t < t
DOM
45
mA
Receiver Dominant State V
th(DOM)
V
BAT
= +7V to +38V
V
Receiver Recessive State V
th(REC)
V
BAT
= +7V to +38V 0.6 x V
BAT
V
Receiver-Threshold Center Voltage
)
V
BAT
= +7V to +38V
0.475 x
0.5 x
0.525 x V
Receiver-Threshold Hysteresis Voltage
V
th(HYS)
V
BAT
= +7V to +38V
0.145 x
0.16 x
0.175 x V
Thermal-Shutdown Threshold T
SHDN
°C
Thermal-Shutdown Hysteresis 10 °C
ESD PROTECTION
Human Body Model LIN
kV
Contact Discharge IEC61000-4-2
LIN, NWAKE, BAT (tested to IBEE test setup) C
1
= 100nF on V
BAT
,
C
2
= 220pF on LIN,
R = 33kΩ on NWAKE
±4 kV
V
th(RECOVERY
-100
Sleep mode, V
= GND, V
LIN
NSLP
= GND
V
= +12V, V
BAT
= +60V, V
LIN
V
th(CENTER
= GND,
TXD
V
V
BAT
BAT
V
V
+165
±12
0.4 x V
BAT
BAT
BAT
V
BAT
V
BAT
MAX13020/MAX13021
±60V Fault-Protected LIN Transceivers
_______________________________________________________________________________________ 5
TIMING CHARACTERISTICS
(V
BAT
= +5V to +38V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at V
BAT
= +12V and TA= +25°C. Positive
currents flow into the device.)
PARAMETER SYMBOL CONDITIONS
UNITS
LIN Duty Factor 1 D1 = t
BUS(REC)(MAX)
/(2 x t
BIT
)
D1
V
BAT
= +7V to +18V, V
th(REC)(MAX)
=
0.744 x V
BAT,
V
th(DOM)(MAX)
= 0.581 x V
BAT,
t
BIT
= 50µs (Figure 4, Note 2)
—
LIN Duty Factor 2 D2 = t
BUS(REC)(MAX)
/(2 x t
BIT
)
D2
V
BAT
= +8V to +18V,
V
th(REC)(MIN)
= 0.422 x V
BAT,
V
th(DOM)(MIN)
= 0.284 x V
BAT,
t
BIT
= 50µs (Figure 4, Note 2)
—
LIN Duty Factor 3 D3 = t
BUS(REC)(MAX)
/(2 x t
BIT
)
D3
V
BAT
= +7V to +18V,
V
th(REC)(MAX)
= 0.778 x V
BAT,
V
th(DOM)(MAX)
= 0.616 x V
BAT,
t
BIT
= 96µs (Figure 4, Note 2)
—
LIN Duty Factor 4 D4 = t
BUS(REC)(MAX)
/(2 x t
BIT
)
D4
V
th(REC)(MIN)
= 0.389 x V
BAT,
V
th(DOM)(MIN)
= 0.251 x V
BAT
,
V
BAT
= +8V to +18V,
t
BIT
= 96µs (Figure 4, Note 2)
—
Propagation Delay of Receiving Node
t
p(RX)
V
BAT
= +7V to +18V,
C
RXD
= 20pF (Figure 4)
6µs
Receiver Propagation Delay Symmetry
t
p(RX)(SYM)
V
BAT
= +7V to +18V,
C
RXD
= 20pF, R
RXD
= 1kΩ
-2 +2 µs
Continuously Dominant-Clamped LIN Bus Detection Time
)
Normal/low slope mode (MAX13021), V
LIN
= GND
40 80
ms
Continuously Dominant-Clamped LIN Bus Recovery Time
)
Normal/low slope mode (MAX13021), V
LIN
= GND
0.5 1 2 ms
Dominant Time for Wake-Up of the LIN Transceiver
t
BUS
Sleep mode (Figure 3) 30 70
µs
TXD Permanent Dominant Disable Time
)
Normal/low slope mode, V
TXD
= GND
20 80 ms
Dominant Time for Wake-Up Through NWAKE
t
NWAKE
Sleep mode 7 20 50 µs
Rising edge with respect to falling edge,
t
LIN(DOM)(DET
t
LIN(DOM)(REC
t
TXD(DOM)(DIS
MIN TYP MAX
0.396
0.581
0.417
0.590
160
150
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