Analog Integrated Circuit Device Data

8

Freescale Semiconductor

33797

ELECTRICAL CHARACTERISTICS

STATIC ELECTRICAL CHARACTERISTICS

VFIRE1A / VFIRE2A Current During High Side Safing Sensor Diagnostics

(Command $CO)

Per VFIREXA pin, with High Side Safing Sensor Diagnostic active

260

350

400

µA

VFIRE1B / VFIRE2B Current During High Side Safing Sensor Diagnostics

(Command $CO)

Per VFIREXB pin, with High Side Safing Sensor Diagnostic active

22

32

55

µA

VFIRE1B / VFIRE2B Current During VFIRE Diagnostics (Command $C5)

Either VFIRE!B or VFIRE2B Diagnostic active

0.3

2.0

3.8

mA

VFIRE Quiescent Current - Total

All VFIRE pins measured together, with Diagnostics Off

90

135

180

µA

Maximum Allowable External Capacitance to Ground (9)

Per Squib pin SQB_LO and SQB_HI

–

–

0.12

µF

Maximum Allowable External Resistance to Ground During Firing (9)

VFIRE_RTN pin to Ground

–

–

0.15

Ω

Individual FET Driver Thermal Shutdown (9), (10)

160

–

190

C

FET Driver Thermal Shutdown Re-Enable Threshold After Drive Cool-down

(9), (10)

90

–

110

C

FET DRIVERS HIGH- AND LOW-SIDE DRIVER TRANSISTOR STATUS/DIAGNOSTICS ($82, $83 COMMANDS)

Voltage Transistor Test Threshold for High-Side Driver Transistor

5.5

6.0

6.5

V

High-Side Driver Current Limit During High-Side Driver Transistor

Diagnostics

15 V

≤ V

2.0

10

50

mA

Voltage Transistor Test Threshold for Low-Side Driver Transistor

1.0

1.4

2.0

V

Low-Side Driver Current Limit During Low-Side Driver Transistor

Diagnostics

15 V

≤ V

2.0

10

50

mA

FEN INPUT PIN (FEN_1 AND FEN_2)

Internal Current Pull-Down

-25

-40

-50

µA

Logic Low Level

0.0

2.5

V

Fire Enable Pin Logic High Level

2.5

V

Notes

9

Guaranteed by design.

10

With a nominal squib load, the FET squib driver will not enter thermal shutdown until the driver has been active for a minimum of 2.1 ms.

The individual squib driver thermal shutdown will not affect other squib driver firing ON times. With a shorted squib load, the FET squib

driver will not enter thermal shutdown until the driver has been active for a minimum of 2.1 ms. When the thermal shutdown limit is

exceeded, the FET driver will turn OFF and the thermal status bit will be set to 1. The FET squib driver can be activated through the

Shorted squib load: 0.1

Ω.

Table 3. Static Electrical Characteristics (continued)

Characteristic

Symbol

Min

Typ

Max

Unit