L9966 datasheet(24/122 Pages) STMICROELECTRONICS

24 / 122 page

Symbol

Parameter

Condition

Min Typ Max Unit

Tested at open load, current source = Ipu_7 (Voltage slope on

IO depends on current selected and load on the IO)

Internal back to back diode is implemented on each FlexInput channel to avoid pulling up of UBSW by FlexInput

short to a high external source.

Pull-up voltage for digital channels is limited to VPRE only: neither 5V_REF nor VVAR voltage limitations are

applied on digital IOs. Conversely, all three of them (VPRE, 5V_REF and VVAR) can be applied to the analog

channels.

Output load is 6.8 nF (+/-20%), ESR max = 1 Ω + external wiring and sensor capacitance. On pins which can be

routed to SENT sensors, the load can also be 82 pF//(2.2 nF+560 Ω) + wire and sensor capacitance.

Pull Up current values are reported in Table 14. IOx saturation voltages with respect to VPRE are reported in

Table 15.

Table 14. Pull up current value

Symbol

Parameter

Condition

Min Typ Max Unit

UBSW = 7.5 V:36 V, VDD5V = 4.85 V:5.15 V, Tj-max = 150 °C unless otherwise specified.

Ipu_7

Pull up current

Current source code [CV2,CV1,CV0]=111, pull-up current to

VPRE (to 5V_REF or VVAR only for IO1-12)

-20% 20 +20% mA

IO1-15

Ipu_6

Pull up current

Current source code [CV2,CV1,CV0]=110, pull-up current to

VPRE (to 5V_REF or VVAR only for IO1-12)

-20% 10 +20% mA

IO1-15

Ipu_5

Pull up current

Current source code [CV2,CV1,CV0]=101, pull-up current to

VPRE (to 5V_REF or VVAR only for IO1-12)

-20%

+20% mA

IO1-15

Ipu_4

Pull up current

Current source code [CV2,CV1,CV0]=100, pull-up current to

VPRE (to 5V_REF or VVAR only for IO1-12)

-20%

+20% mA

IO1-15

Ipu_3

Pull up current

Current source code [CV2,CV1,CV0]=011, pull-up current to

VVAR 5V_REF, VPRE

-20% 500 +20%

IO1-8

Ipu_3_lambda(1)

Pull up current

Current source code [CV2,CV1,CV0]=011,pull-up current to

VVAR, 5V_REF, VPRE

450

500

550

µA

IO9-12

Ipu_3_lambda1

Pull up current

Current source code [CV2,CV1,CV0]=011, pull-up current to

VPRE

-20% 500 +20%

µA

IO13- 15

Ipu_2

Pull up current

Current source code [CV2,CV1,CV0]=010, pull-up current to

VPRE (to 5V_REF or VVAR only for IO1-12)

-20% 250 +20%

µA

IO1-15

Ipu_1

Pull up current

Current source code [CV2,CV1,CV0]=001, to VPRE (5V_REF

or VVAR in case IO[8:1])

-20% 20 +20%

µA

IO1-8;

IO13-15

Ipu_1

Pull up current

Current source code [CV2,CV1,CV0]=001 to VPRE, 5V_REF

or VVAR

µA

IO9-12

Ipu_0

Pull up current

Current source code [CV2,CV1,CV0]=000 pull-up current to

5V_REF, VPRE

-21% 7.5 +21%

µA

IO1-12

Ipu_0

Pull up current

Current source code [CV2,CV1,CV0]=000 pull-up current to

VPRE(2)

-25% 7.5 +25%

µA

IO13-15

Ipu_0_lambdaVVAR Pull up current

Current source code [CV2,CV1,CV0]=000 pull-up current to

VVAR

-50%

+50%

µA

IO1-12

1. Ipu_3_lambda IO9-12 is the reference current for trimming.

2. In case of minimum current selection on IO[15:13], pull up voltage reaches VPRE only in case of UTh2 or

UTh_ratio is configured.

The above current ranges can be guaranteed only if sufficient headroom is available with respect to the pull-up

reference voltage. In case of VPRE, Table 15. Pull up saturation voltage shows the different voltage ranges and

the relative current capability.

In case 5V_REF or VVAR are selected, the above current ranges are guaranteed for all voltage ranges from 0V to

5V_REF or VVAR.

L9966

Pull-up current programming

DS12459 - Rev 10

page 24/122

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