MC33742 datasheet(13/52 Pages) MOTOROLA

Part #	MC33742

Description	System Basis Chip (SBC) with Enhanced High-Speed CAN Transceiver

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Manufacturer	MOTOROLA [Motorola, Inc]

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MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA

33742

13

DYNAMIC ELECTRICAL CHARACTERISTICS

Characteristics noted under conditions 4.75 V

≤ V2 ≤ 5.25 V, 5.5 V ≤ VSUP ≤ 18 V, and -40°C ≤ TA ≤ 125°C. Typical values noted

reflect the approximate parameter mean at TA =25°C under nominal conditions unless otherwise noted.

Characteristic

Symbol

Min

Typ

Max

Unit

DIGITAL INTERFACE TIMING (Note 28)

SPI Operation Frequency

fREQ

0.25

–

4.0

MHz

SCLK Clock Period

tPCLK

250

–

N/A

ns

SCLK Clock High Time

tWSCLKH

125

–

N/A

ns

SCLK Clock Low Time

tWSCLKL

125

–

N/A

ns

Falling Edge of CS to Rising Edge of SCLK

tLEAD

100

–

N/A

ns

Falling Edge of SCLK to Rising Edge of CS

tLAG

100

–

N/A

ns

MOSI to Falling Edge of SCLK

tSISU

40

–

N/A

ns

Falling Edge of SCLK to MOSI

tSIH

40

–

N/A

ns

MISO Rise Time (Note 29)

CL = 220 pF

tRSO

–25

50

ns

MISO Fall Time (Note 29)

CL = 220 pF

tFSO

–25

50

ns

Time from Falling or Rising Edges of CS

MISO Low Impedance

MISO High Impedance

tSOEN

tSODIS

–

50

ns

Time from Rising Edge of SCLK to MISO Data Valid

0.2 VDD ≤ MISO ≥ 0.8 VDD, CL = 200 pF

tVALID

––

50

ns

STATE MACHINE TIMING

Delay Between CS LOW-to-HIGH Transition (at End of SPI Stop Command)

and Stop Mode Activation (Note 30)

tCS-STOP

18–34

µs

Interrupt Low-Level Duration

Stop Mode

tINT

7.0

10

13

µs

Internal Oscillator Frequency (Note 31)

fOSC

–

100

–

kHz

Watchdog Period Normal and Standby Modes

Period 1

Period 2

Period 3

Period 4

tWD

8.58

39.6

88

308

9.75

45

100

350

10.92

50.4

112

392

ms

Notes

28.

See Figure 4, SPI Timing Diagram, page 17.

29.

Not production tested. Guaranteed by design.

30.

Not production tested. Guaranteed by design. Detected by V2 OFF.

31.

fOSC is indirectly measured (1.0 ms reset) and trimmed.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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