MC33910BAC / MC34910BAC
ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
Table 34. Dynamic Electrical Characteristics
Characteristics noted under conditions 5.5 V ≤ VSUP ≤ 18 V, -40°C ≤ TA ≤ 125°C for the 33910 and -40°C ≤ TA ≤ 85°C for the
34910, unless otherwise noted. Typical values noted reflect the approximate parameter mean at TA = 25°C under nominal
conditions, unless otherwise noted.
Characteristic
SPI INTERFACE TIMING (Figure 34)
Symbol
Min
Typ
Max
Unit
SPI Operating Frequency
f
t
–
–
–
–
–
–
–
–
–
4.0
N/A
N/A
N/A
N/A
N/A
N/A
N/A
MHz
ns
SPIOP
SCLK Clock Period
250
110
110
100
100
40
CLK
PS
SCLK Clock High Time(105)
t
ns
SCLKH
W
SCLK Clock Low Time(105)
t
ns
SCLKL
W
Falling Edge of CS to Rising Edge of SCLK(105)
Falling Edge of SCLK to CS Rising Edge(105)
MOSI to Falling Edge of SCLK(105)
Falling Edge of SCLK to MOSI(105)
MISO Rise Time(105)
t
ns
LEAD
tLAG
ns
t
ns
SISU
t
40
ns
SIH
tRSO
ns
C = 220 pF
L
–
–
40
40
–
–
MISO Fall Time(105)
t
ns
ns
FSO
C = 220 pF
L
Time from Falling or Rising Edges of CS to:(105)
- MISO Low-impedance
t
0.0
0.0
–
–
50
50
SOEN
- MISO High-impedance
t
SODIS
Time from Rising Edge of SCLK to MISO Data Valid(105)
t
ns
VALID
0.2 x VDD ≤ MISO ≥ 0.8 x VDD, CL = 100 pF
0.0
–
75
RST OUTPUT PIN
Reset Low-level Duration after VDD High (See Figure 33)
Reset Deglitch Filter Time
t
0.65
350
1.0
1.35
900
ms
ns
RST
t
600
RSTDF
WINDOW WATCHDOG CONFIGURATION PIN (WDCONF)
Watchdog Time Period(106)
t
ms
PWD
External Resistor REXT = 20 kΩ (1%)
External Resistor REXT = 200 kΩ (1%)
Without External Resistor REXT (WDCONF Pin Open)
8.5
79
10
94
11.5
108
205
110
150
Notes
105. This parameter is guaranteed by process monitoring but, not production tested.
106. Watchdog timing period calculation formula: tPWD [ms] = 0.466 * (REXT - 20) + 10 (REXT in kΩ)
33910
Analog Integrated Circuit Device Data
Freescale Semiconductor
59
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