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M59330P
LAN Transceiver
REJ03F0032-0100Z Rev.1.0 Sep.16.2003
Description
The M59330P is an integrated circuit for two-line LAN transceivers, conforming to J1850 specifications. The chip incorporates bus line anomaly detection functions; anomalous behavior causes the ERR signal to go to "L". A selector causes a normal bus signal to be output to RX. By setting the standby signal to "L", a low consumption current state is maintained. At this time, the drivers BUS (+) and BUS (-) are both turned off. In standby mode, on input of "H" level to the ERR pin, error output reset occurs.
Features
* Conforms to SAE J1850 specifications * Internal bus line anomaly detection function
Applications
* LAN transceiver for automotive use, generic LAN transceiver, transceiver for other communication applications
Block Diagram
Rev.1.0, Sep.16.2003, page 1 of 10
M59330P
Pin Configuration (Top View)
Explanation of Functions
Pin Deiscription
Pin no. 1 2 3 Pin name Tx STB ERR I/O I I I/O Function Data signal input pin Standby signal input pin; L: standby mode, H: normal operation Error signal output pin and error reset input pin; on detection of anomaly in transmission channel, outputs "L" level; in standby mode, error reset on input of "H" level Pin for output of signal from transmission channel Clamping pin Pin for signal output to transmission channel and for input of signal from transmission channel (negative logic) Pin for signal output to transmission channel and for input of signal from transmission channel (positive logic) Power supply pin
4 5 6 7 8
Rx Vss Bus(-) Bus(+) VDD
O I I/O I/O I
Rev.1.0, Sep.16.2003, page 2 of 10
M59330P Transmission Channel Anomaly Detection and Communication Functions The M59330P uses driver overcurrent detection functions and transmission signal logic error detection functions to detect anomalies in the transmission channel, and outputs an error signal (ERR (pin 3) = "L" ) accordingly. Also, by switching the signal output to pin RX (pin 4) according to the anomalous state, communication is possible after anomaly occurrence. (1) Overcurrent detection The drivers of the BUS(+) pin (pin 7) and BUS(-) pin (pin 6) of the M59330P are provided with overcurrent detection circuits. When excessive current flows in a driver, the driver is turned off, and an error signal (ERR (pin 3) = "L" ) is output. When overcurrent is detected, the driver is maintained in the off state until error reset. The drivers for the BUS(+) pin (pin 7) and the BUS(-) pin (pin 6) are independent; depending on the circumstances of the anomaly, both may be turned off. A filter is incorporated to prevent erroneous operation due to transient currents when a driver is turned on, and an overcurrent state is not detected for a short period of time (several hundred ns). The detection current is set at approx. 180 mA. (2) Logical anomaly detection M59330P transmission signals operate at opposite phases, and by comparing the signals, anomalies in the transmission channel are detected. The signals are compared at a preset time relative to an edge of the signals of the transmission channels (BUS(+) , BUS(-)), and if they do not coincide, it is assumed that an anomaly has occurred in one of the transmission channels, and an error signal (ERR (pin 3) ="L") is output. When the next edge is detected within the preset time, this edge is taken as a new reference for timing, and if noncoincidence continues for longer than the preset time, an anomaly is detected. The time is set to approx. 4.2 s. Logical anomaly detection does not support multiple error modes. When only a logical anomaly is detected, the driver is not turned off. A driver is turned off upon anomaly detection only when overcurrent is detected.
Rev.1.0, Sep.16.2003, page 3 of 10
M59330P (3) Communication functions The M59330P normally outputs differential signals on BUS (+) (pin 7) and BUS (-) (pin 6), but when an anomaly is detected, switches signal output to the RX pin (pin 4) according to the anomaly state. When overcurrent is detected, an anomaly with the driver or transmission channel for which the overcurrent was detected is assumed, and an error signal is output; at the same time, the signal for the other transmission channel is output to the RX output (pin 4). As explained in (1) above, in some cases both drivers may be turned off; in such cases, the RX output (pin 4) is fixed at "L". When a logical anomaly is detected, an error signal (ERR (pin 3) = "L") is output, and at the same time the RX output (pin 4) is driven to "L". After error signal output, a transmission channel for which a transmission signal edge is detected is regarded as normal, and the signal for the channel is output to the RX output (pin 4). Overcurrent detection takes precedence over logical anomaly detection in operations to switch the error signal output and RX output. Table 1. Anomaly modes and anomaly detection functions
Anomaly mode 1 2 3 4 5 6 6 Bus(+) GND short VDD short Open GND short VDD short Open BUS(+), BUS(-) short Error output Y Y Y Y Y Y Y Communication after anomaly detection Y Y Y Y Y Y N Method of anomaly detection (2) (1), (2) (2) (1), (2) (2) (2) (1)
Bus(-)
Error Reset After standby mode is entered (the STB pin (pin 2) ="L"), the M59330P error output is reset by inputting level "H" to the ERR pin (pin 3). In this case, all operations relating to anomaly detection, such as overcurrent detection and RX output switching, are canceled. Standby Mode By driving the STB pin (pin 2) to "L" level, the M59330P can be put into a low consumption current mode. In standby mode, the driver and overcurrent detection functions do not operate, but the logical anomaly detection function continues to operate, and except for overcurrent detection, detection of anomalies is possible. However, there is only error signal output, and RX output signal switching is not performed. In standby mode, the RX output is the logical sum of the BUS(+) signal and the BUS(-) signal.
Rev.1.0, Sep.16.2003, page 4 of 10
M59330P
Input/Output Equivalent Circuits
Rev.1.0, Sep.16.2003, page 5 of 10
M59330P
Electrical Characteristics
(unless otherwise noted, Ta=-40 to 85C)
Symbol IDD1 IDD2 IDD3 VTH1 VTH2 VTL |VHYSL| VCIN |VHYS8| IIPP1 IIPP1 IIPP2 IIDP2 IIPM1 IIDM1 IIPM2 VIDM2 VDROP1 VDROP2 VOH1 VOL1 VOH2 IPD Cl1 Cl2 VTH1 Quantity Power supply current 1 Power supply current 2 Power supply current 3 "H" input threshold voltage 1 "H" input threshold voltage 2 "L" input threshold voltage Hysteresis width BUS input voltage range Input hysteresis width BUS(+) leakage current 1 BUS(+) leakage current 2 BUS(+) leakage current 3 BUS(+) leakage current 4 BUS(-) leakage current 1 BUS(-) leakage current 2 BUS(-) leakage current 3 BUS(-) leakage current 4 Driver drop voltage "H" output voltage 1 "L" output voltage 1 "H" output voltage 2 ERR pull-down current Input capacitance 1 Input capacitance 2 Ground offset voltage Conditions RBUS = 105 , Tx = "L", STB = "H" RBUS = 105 , Tx = "H", STB = "H" RBUS = 105 , Tx = STB = "H" ERR Tx, STB Tx, STB Tx, STB BUS(+), BUS(-) BUS(+), BUS(-) differential input with power supply off (VDD = 0V), BUS(+) = 0V with power supply off (VDD = 0V), BUS(+) = 5V with power supply onBUS(-) = 5V with power supply onBUS(-) = 0V with power supply off-50mA with power supply off+50mA with power supply on with power supply on IBUS(+) = -50mA IBUS(-) = +50mA RX pin IOH = -1mA RX pin IOL = +1mA ERR pin IOH = -1mA ERR pin VOH = 3.0V power supply OFF (VDD = 0V) power supply ON across two nodes 2.2 2.3 1.6 0.4 Vss 70 Rated value Min. Typ. Max. 5.0 55 200 3.2 3.5 2.8 1.0 VDD-2.0 300 100 100 -20 100 100 100 20 100 1.0 0.6 5.0 0.6 5.0 700 150 150 1.0 mA mA A V V V V V mV A A A Unit
A
A
A
A A V V V V A pF pF V
4.5 4.5 350
Rev.1.0, Sep.16.2003, page 6 of 10
M59330P
Absolute Maximum Ratings
(unless otherwise noted, Ta =-40 to 85C)
Symbol VDD V1 V0 lo Pmex Tstg Quantity Power supply voltage Input voltage Output voltage Driver output current Allowable power consumption Storage temperature Conditions Rated value Min. -0.3 -0.3 -0.3 BUS(+) BUS(-) -50 -50 200 125 mW C Typ. Max. 6.5 VDD+0.3 VDD+0.3 50 V V V mA Unit
Note: All voltages use the circuit VSS pin as reference; maximum and minimum values are absolute values; and currents are positive when flowing into a circuit, and negative (preceded by a minus sign) when flowing outward.
Recommended Operating Conditions
(unless otherwise noted, Ta =-40 to 85C)
Symbol VDD RBUS CBUS Quantity Power supply voltage BUS resistance BUS capacitance transmission rate = 41.6Kbps transmission rate = 125Kbps transmission rate = 41.6Kbps RBUS = 378 transmission rate = 125Kbps, RBUS = 378 -40 Conditions Rated value Min. 4.75 105 105 10000 3000 85 C pF Typ. Max. 5.25 V Unit
Topr
Operating ambient temperature
Timing Characteristics
(unless otherwise noted, Ta = 25C, VDD=5.0 V, during normal operation)
Symbol Quantity Conditions Rated value Min. TdTBr TX BUS output delay time CBUS = 10000pF, RBUS = 378 transmission rate =41.6Kbps CBUS = 10000pF, RBUS = 378 transmission rate =41.6Kbps CBUS = 10000pF, RBUS = 378 transmission rate =41.6Kbps transmission rate = 41.6Kbps transmission rate = 41.6Kbps standby mode on error reset on error reset on error reset 3.0 1.0 100 200 Typ. 0.25 Max. Unit
s s s s s s s
ns ns
TdTRr
TX RX rise delay time
0.6
TdBRf
TX RX fall delay time
3.0
TdBRr TdBRf TwS TsS ThS TwE
BUS RX rise delay time BUS RX fall delay time Minimum STB input pulse width STB input setup time STB input hold time ERR input pulse width
0.35 0.33
Rev.1.0, Sep.16.2003, page 7 of 10
M59330P
Timing Charts
Timing Waveforms
Error Reset Timing
Rev.1.0, Sep.16.2003, page 8 of 10
M59330P
Application Circuit Example (One implementation example, which should be studied carefully)
Example Of Transmission Channel Connection
Peripheral Circuit Example
Note:
As surge protection, it is recommended that a Zener diode with VZ = approx. 7 V be used. In order to prevent malfunctions due to noise or other causes, it is recommended that an external capacitor be connected between the power supply pin and ground.
Rev.1.0, Sep.16.2003, page 9 of 10
M59330P
8P4
JEDEC Code - Weight(g) 0.5 Lead Material Cu Alloy
MMP
Plastic 8pin 300mil DIP
Package Dimensions
EIAJ Package Code DIP8-P-300-2.54
E
1
4
D
Symbol
A A2
L
b1 b e b2
A1
SEATING PLANE
A A1 A2 b b1 b2 c D E e e1 L
e1
Rev.1.0, Sep.16.2003, page 10 of 10
c
8
5
Dimension in Millimeters Min Nom Max - - 4.5 - - 0.51 - - 3.3 0.4 0.5 0.59 1.4 1.5 1.8 0.9 1.0 1.3 0.23 0.25 0.35 9.1 8.9 8.7 6.15 6.3 6.45 - - 2.45 - - 7.62 - - 3.0 - 15 0
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