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MC33990

Enhanced Class B Serial Transceiver

Freescale Semiconductor 

ELECTRICAL CHARACTERISTICS

ELECTRICAL PERFORMANCE CURVES

ELECTRICAL PERFORMANCE CURVES

TEST FIGURES

33990

VBAT

BUS

IBUS (LOG)

-18 V

GND

Floating

LOAD

ILOAD (LOG)

Figure 4. Loss of Ground Test Circuit

33990

VBAT

Floating

BUS

IBUS (LOB)

9.0 V

GND

Figure 5. Loss of VBAT Test Circuit

3.5 V

Tx

0.8 V

64 μs

80%

BUS

20%

t rise

t fall

Figure 6. BUS Rise and Fall Times

5.0 V

Tx

0V

64 μs

1.5 V

tpwd(min)

tpwd

tpwd(max)

Figure 7. Pulse Width Distortion

SLEEP

2.5 V

Tx tSLEEPTxSU

2.5 V

BUS

tTxDelay

3.875 V

Figure 8. SLEEP to Tx Delay Times

BUS

Rx

122 μs

tRxDelay / low-

to-output high

3.875 V

tRxDelay /high-to-

output low

2.5 V

Figure 9. BUS-to-Rx Delay Time

33990

8

Analog Integrated Circuit Device Data

Freescale Semiconductor

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