MAX13037 Datasheet, PDF (5/22 Pages) Maxim Integrated Products – Automotive Contact Monitor and Level Shifters with LDO Regulator

Automotive Contact Monitor and
Level Shifters with LDO Regulator
TIMING CHARACTERISTICS (continued)
(BAT = +6V to +26V, T_A = -40°C to +125°C, unless otherwise noted. Typical values are at BAT = +14V, T_A = +25°C.) (Note 2)
PARAMETER
SDI to Falling Edge of CLK
Required Setup Time
Falling Edge of CLK to SDI
Required Hold Time
Time from Falling Edge of CS to
SDO Low Impedance
Time from Rising Edge of CS to
SDO High Impedance
Time from Rising Edge of CLK to
SDO Data Valid
Debounce Time
Scanning Time Pulse
Scanning Time Period
Wetting Time Pulse
Time from Shutdown to Normal
Operation
Time from SCAN Mode to Normal
Operation
Reset Output Pulse Width
Watchdog Timeout Period 1
Watchdog Timeout Period 2
Minimum Watchdog Timeout
Reset on WDI
SYMBOL
CONDITIONS
t_SI(SU) Input rise/fall time < 2ns, Figure 1
t_SI(HOLD) Input rise/fall time < 2ns, Figure 1
t_SO(EN) Input rise/fall time < 2ns, Figure 1
t_SO(DIS) Figures 1 and 2
t_VALID
t_DEB
t_SCAN
t_SCAN-P
t_WETT
t_SD
C_SDO =15pF, Figure 1
C_TDEB = 500pF
C_TDEB = 10nF
SC0 = 0, SC1 = 1, SC2 = 1
WTOFF = 0
SD low-to-high transition to input monitoring
enabled
t_SM
t_RST
t_WD1
t_WD2
(Note 8)
C_TD = 10nF (Figure 3)
C_TD = 10nF, time before INT goes low
(Figure 3)
C_TD = 10nF, time before RST goes low
(Figure 3)
t_WDI
MIN TYP MAX
30
20
55
55
70
3.18
5.9
9.42
63
120 188
130
250
400
4
8
14
10
21
35
200
500
10
21
36
40
84
144
2 x t_WD1
300
UNITS
ns
ns
ns
ns
ms
ms
ms
µs
ms
ms
µs
µs
ms
ms
ms
ns
Note 2: All units are 100% production tested at TA = 125°C. Limits over the operating temperature range are guaranteed by design and
not production tested.
Note 3: VTH_C = (VTH_HIGH + VTH_LOW) / 2.
Note 4: VTH_HYS = (VTH_HIGH - VTH_LOW).
Note 5: Wetting current rise/fall time is measured as the time it takes to go from 20% to 80% of the maximum wetting current.
Note 6: TSHDN is the temperature at which the wetting currents and LDO are disabled.
Note 7: TWARN is the temperature at which only the wetting currents are disabled.
Note 8: When exiting SCAN mode to enter Normal Mode (through SPI) any input change is ignored for 500µs (typ) to allow correct
wake-up of input comparators. After this time elapses, the inputs are monitored in continuous mode.
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