L9177 datasheet(26/49 Pages) STMICROELECTRONICS

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Electrical specifications

L9177

26/49

DocID17617 Rev 1

Figure 15. K-line block diagram

K_LINE

IKshort

Transmitter short

circuit current

KL_LINE = VB, KL_TX =

Low

IKrev

Reverse battery or

GND loss current

ENABLE = KEY = VB = 0 V,

KL_LINE = -13.5

IKpull-up

KLINE internal pull-

KL_TX = High

140

kΩ

IKuv

Under voltage

current

KEY = High, KL_TX = Low,

VB = 13.5 V, KL_LINE = -1 V

KL_RX

VRXoutL

KL_RX output low

voltage

Isink = 0.4 mA

0.4

KL_TX to

K_LINE

Tp_HLT

Transmitter turn-on

delay time

CKline = 10 nF,

RKline = 510 Ω

μs

K_LINE

T_fT

Transmitter fall time

CKline = 10 nF,

RKline = 510 Ω

μs

KL_LINE

to KL_RX

TpR

Receiver turn-on

delay time

Cload = 20 pF,

RPKL_Rx = 2 kΩ

μs

KL_RX

T_fR

Receiver fall time

Cload = 20 pF,

RPKL_Rx = 2 kΩ

μs

T_rR

Receiver rise time

Cload = 20 pF,

RPKL_Rx = 2 kΩ

μs

K_LINE

fMax

Max transmission

Operating

frequency

Application note

kHz

Table 23. K-Line interface electrical characteristics (continued)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

L9177 Datasheet(PDF) 26 Page - STMicroelectronics

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