33480 datasheet(14/39 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

33480

DYNAMIC ELECTRICAL CHARACTERISTICS

SPI INTERFACE CHARACTERISTICS

Maximum Frequency of SPI Operation

fSPI

–

3.0

MHz

Rising Edge of CS to Falling Edge of CS (Required Setup Time) (38)

tCS

–

300

Falling Edge of CS to Rising Edge of SCLK (Required Setup Time) (38)

tLEAD

–

167

Required High State Duration of SCLK (Required Setup Time) (38)

tWSCLKh

–

167

Required Low State Duration of SCLK (Required Setup Time) (38)

tWSCLKl

–

167

Falling Edge of SCLK to Rising Edge of CS (Required Setup Time) (38)

tLAG

–

167

SI to Falling Edge of SCLK (Required Setup Time) (39)

tSI(SU

–

Falling Edge of SCLK to SI (Required Setup Time) (39)

tSIHOLD

–

SO Rise Time

CL = 200 pF

tRSO

–

SO Fall Time

CL = 200 pF

tFSO

–

SI, CS, SCLK, Incoming Signal Rise Time (39)

tRSI

–

SI, CS, SCLK, Incoming Signal Fall Time (39)

tFSI

–

Time from Falling Edge of CS to SO Low Impedance (40)

tSO(EN)

–

145

Time from Rising Edge of CS to SO High Impedance (41)

tSO(DIS)

–

145

Time from Rising Edge of SCLK to SO Data Valid (42)

0.2 Vcc ≤ SO ≥ 0.7 Vcc, CL = 200 pF

tVALID

–

105

Notes

38.

Maximum setup time required for the 33480 is the minimum guaranteed time needed from the microcontroller.

39.

Rise and Fall time of incoming SI, CS, and SCLK signals suggested for design consideration to prevent the occurrence of double pulsing.

40.

Time required for output status data to be available for use at SO. 1.0 k

Ω on pullup on CS.

41.

Time required for output status data to be terminated at SO. 1.0 k

Ω on pullup on CS.

42.

Time required to obtain valid data out from SO following the rise of SCLK.

Table 4. Dynamic Electrical Characteristics

Characteristics noted under conditions 4.5 V

≤ VCC ≤ 5.5 V, 7.0 V ≤ VBAT ≤ 18 V, -40°C ≤ TA ≤ 125°C, GND = 0 V unless

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

otherwise noted.

Characteristic

Symbol

Min

Typ

Max

Unit

33480 Datasheet(PDF) 14 Page - Freescale Semiconductor, Inc

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