L9777C datasheet(20/25 Pages) STMICROELECTRONICS

20 / 25 page

Electrical and thermal characteristics

L9777

20/25

Doc ID 13496 Rev 2

NMI

VCCUN

VCC under voltage

threshold

RADJ = 0 V

4.5V

0.94

VCC

0.96

VCC

RADJ

VRADJTH

Threshold for VCC under

voltage detection

1.15

1.20

1.25

RADJ

VRJMUXTH

Threshold for RADJ

multiplexer comparator

0.52

0.62

0.72

DVDU

NMI timing high

threshold

1.14

1.24

1.34

VDRL

NMI timing low threshold -

0.52

0.62

0.72

DIRC

Charge current

VI = 13.5 V

VD = 0.1 V

μA

DIRD

Discharge current

VI = 13.5 V

VD = 2.5 V

μA

NMI

TRR1

NMI spike dependent

filter time in case of

internal reset threshold

VCC > 2 V

RADJ = 0V

μs

NMI

TRRADJ

NMI fixed filter time in

case of external reset

threshold

External resistor

divider on RADJ

(see Figure 11). VCC > 2 V

12.5

μs

NMI

TRD

NMI power up delay

VI =13.5 V, CD=10 nF

115

NMI

INMIL

NMI limitation current

RESET (option A & B)

RESET

VRESL

Reset output low voltage Rext = 5 kΩ to VCC, VCC > 1 V

0.4

RESET

IRESETLK

RESET output leakage

current

μA

RESET

IRESL

RESET limitation current -

RESET

TRESDF

RESET delay from NMI

falling edge

CTIMING = 2.2 nF

350

550

750

μs

RESET

TRESDR

RESET delay from NMI

rising edge

μs

RESET

RRESET

Pull up internal

resistance

122550

VDD_LOW (option C)

VDD_LOW VVDD_LOWL Reset output low voltage Rext = 5 kΩ to VCC, VCC > 1 V

0.4

VDD_LOW IVDD_LOWLK

RESET output leakage

current

μA

VDD_LOW

IVDD_LOWL RESET limitation current -

VDD_LOW

RVDD_LOW

Pull up internal

resistance

122550

Table 4.

Electrical and thermal characteristics (continued)

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

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