mc33912 Freescale Semiconductor, Inc, mc33912 Datasheet - Page 14

• Manufacturer Part Number: mc33912
• Description: Lin System Basis Chip With Dc Motor Pre-driver And Current Sense
• Manufacturer: Freescale Semiconductor, Inc

Table 4. Dynamic Electrical Characteristics
34912, unless otherwise noted. Typical values noted reflect the approximate parameter mean at T
conditions, unless otherwise noted.
14
33912
ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
SPI INTERFACE TIMING (SEE
RST OUTPUT PIN
WINDOW WATCHDOG CONFIGURATION PIN (WDCONF)
CURRENT SENSE AMPLIFIER
Notes
SPI Operating Frequency
SCLK Clock Period
SCLK Clock High Time
SCLK Clock Low Time
Falling Edge of
Falling Edge of SCLK to
MOSI to Falling Edge of SCLK
Falling Edge of SCLK to MOSI
MISO Rise Time
MISO Fall Time
Time from Falling or Rising Edges of
- MISO Low-impedance
- MISO High-impedance
Time from Rising Edge of SCLK to MISO Data Valid
Reset Low-level Duration After V
Reset Deglitch Filter Time
Watchdog Time Period
Common Mode Rejection Ratio
Supply Voltage Rejection Ratio
Gain Bandwidth Product
Output Slew-Rate
41.
42.
43.
Characteristics noted under conditions 5.5V ≤ V
C
C
0.2 x V
External Resistor R
External Resistor R
Without External Resistor R
L
L
= 220pF
= 220pF
This parameter is guaranteed by process monitoring but not production tested.
Watchdog timing period calculation formula: t
Analog Outputs are supplied by V
DD
≤ MISO ≥ 0.8 x V
CS
(41)
(41)
to Rising Edge of SCLK
(41)
EXT
EXT
(42)
(41)
CS
= 20kΩ (1%)
= 200kΩ (1%)
Rising Edge
(41)
(41)
DD
Characteristic
EXT
(41)
(43)
Figure
DD
, C
(WDCONF Pin Open)
L
High (see
CS
= 100pF
13, PAGE
DYNAMIC ELECTRICAL CHARACTERISTICS
DD
(41)
to:
(41)
(41)
Figure
20
)
PWD
(41)
12, page
SUP
[ms] = 0.466 * (R
≤ 18V, -40°C ≤ T
20
)
EXT
- 20) + 10 (R
A
t
Symbol
t
≤ 125°C for the 33912 and -40°C ≤ T
W
t
t
W
f
t
t
t
t
PS
SODIS
RSTDF
SPIOP
t
t
CMR
LEAD
SOEN
VALID
t
SVR
GBP
t
t
t
SISU
t
PWD
SCLKH
RSO
FSO
SCLKL
LAG
RST
SR
SIH
CLK
EXT
in kΩ)
0.65
0.75
Min
250
110
110
100
100
350
110
0.0
0.0
0.0
8.5
0.5
40
40
79
70
60
–
–
–
Analog Integrated Circuit Device Data
Typ
600
150
A
1.0
3.0
40
40
10
94
–
–
–
–
–
–
–
–
–
–
–
–
–
–
= 25°C under nominal
Freescale Semiconductor
Max
1.35
11.5
N/A
N/A
N/A
N/A
N/A
N/A
N/A
900
108
205
4.0
50
50
75
–
–
–
–
–
–
A
≤ 85°C for the
Unit
MHz
MHz
V/µs
ms
ms
dB
dB
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns