MC33990 查看數據表（PDF） - Freescale Semiconductor

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MC33990

Enhanced Class B Serial Transceiver

Freescale Semiconductor 

INTERNAL BLOCK DIAGRAM

INTERNAL BLOCK DIAGRAM

VBAT

SLEEP

TX

RX

4X/LOOP

4.5 V

Reference

Digital Output

Driver

33990

Voltage

Regulator

Waveshaping

Filter

4X Enable

Loopback

Bus

Driver

Thermal

Shutdown

BUS

Loss of Ground

Protection

LOAD

GND

Note This device contains approximately 400 active transistors and 250 gates.

Figure 2. 33990 Simplified Internal Block Diagram

33990

2

Analog Integrated Circuit Device Data

Freescale Semiconductor

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