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MC33690 bảng dữ liệu(PDF) 8 Page - Motorola, Inc |
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MC33690 bảng dữ liệu(HTML) 8 Page - Motorola, Inc |
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8 / 24 page  MOTOROLA SEMICONDUCTORS PRODUCTS 8 revision 4.8, 5 February 2002 © Motorola, Inc., 2002. MC33690 ISO 9141 PHYSICAL INTERFACE This interface module is fully compatible with the ISO 9141 norm describing the diagnosis line. It includes one transmitter (pin K) and 2 receivers (pins K and AM). The input stages consist of high voltage CMOS triggers. The thresholds are ratiometric to VSUP. A ground referenced current source (2.5µA typ.) pulls down the input when unconnected. When a negative voltage is applied on the K or AM lines, the input current is internally limited by a 2k Ω resistor (typ.) in series with a diode. A current limitation allows the transmitter to drive any capacitive load and protects against short circuit to the battery voltage. An overtemperature protection shuts the driver down when the junction temperature exceeds 150°C (typ). Once shut down by the overtemperature protection, the driver can be switched on again : - if the junction temperature has decreased below the threshold, - and by applying an off/on command, coming either from the demodulator in configurations A and B or directly applied on the input Tx in configuration C (see pin K status in table 1 page 9). The electromagnetic emission is reduced thanks to the voltage slew rate control (5V/µs typ.). Figure 5 : ISO 9141interface Command Rx K Tx K line VBAT 2k Ω Over temperature Current limitation detector VDD VDD Tag Reader module output AM VSUP From configuration controller AM data From configuration controller L line VSUP VDD GND 2.5 µA GND 2.5 µA 2k Ω GND GND Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
Số phần tương tự - MC33690 |
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Mô tả tương tự - MC33690 |
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