33812 datasheet(11/25 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

33812

ELECTRICAL CHARACTERISTICS

DYNAMIC ELECTRICAL CHARACTERISTICS

Characteristics noted under conditions of 7.0 V

≤ VPWR ≤ 18 V, -40°C ≤ TC ≤ 125°C, unless otherwise noted. Where applicable,

typical values reflect the parameter’s approximate average value with VPWR = 14 V, TA = 25°C.

Characteristic

Symbol

Min

Typ

Max

Unit

POWER INPUT

Required Low State Duration on VPWR for Under-voltage Detect

VPWR ≤ VPWR_UV(15)

tUV

1.0

–

μs

WATCHDOG TIMER

Maximum time value Watchdog can be loaded with

WDMAX

–

Maximum WDRFSH pulse width to load full Watchdog time value

WDLOAD

–

1.0

Minimum pulse width on WDRFSH to refresh Watchdog timer

WDRFSHMIN

1.0

–

μs

Reset Pulse Width when Watchdog times out

WDRESET

100

–

μs

ISO9141 TRANSCEIVER

Typical ISO9141 Data Rate(15)

ISOBR

–

kbps

Turn OFF Delay MTX Input to ISO Output

tTXDF

–

2.0

μs

Turn ON/OFF Delay ISO Input to MRX Output

tRXDF, tRXDR

–

1.0

μs

Rise and Fall Time MRX Output (measured from 10% to 90%)

tRXR, tRXF

–

1.0

μs

Maximum Rise and Fall Time MTX Input (measured from 10% to 90%)(15)

tTXR, tTXF

–

1.0

μs

LAMP DRIVER

Inrush Current Blanking Time (LAMPOUT only)

tOC(BLANK)

5.0

7.0

9.0

LAMPOUT, automatic retry timer during short to battery fault condition

tRETRY_LAMP

7.0

DIGITAL LOGIC OUTPUTS

INJFLT, IGNFLT Output Signal Rise Time (15)

tR(DLO)

–

100

200

INJFLT, IGNFLT Output Signal Fall Time(15)

tF(DLO)

–

100

200

INJECTOR AND RELAY DRIVER

Output ON Current Limit Fault Filter Timer

tSC

µs

Output OFF Open Circuit Fault Filter Timer (INJECTOR and RELAY

Driver)

t(OFF)OC

100–400

µs

Output Slew Rate - Rise - ZLOAD = 14 Ω , VLOAD = 14 V

tSR(RISE)

1.0

5.0

μs

Output Slew Rate - Fall - ZLOAD = 14 Ω, VLOAD = 14 V

tSR(FALL)

1.0

5.0

μs

IGNITION PRE-DRIVER

Output OFF Open Circuit Fault Filter Timer

t(OFF)OC

100–400

µs

Output ON Short-circuit to Battery Fault Detection Timer

t(ON)(SC)

µs

Notes

15.

This parameter is guaranteed by design, however is not production tested.

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