LE79Q2281DVC 参数 Datasheet PDF下载

Le79228

LINE CARD PARTS LIST - EXTERNAL RINGING

Data Sheet

The following list defines the parts and part values required to meet target specification limits for channel i of the line card

(i = 1,2,3,4 or i = 1,2).

Item

U1

i

U2

U3

i

U4

i

U5

i

F

Ai

, F

Bi

R

SAi

, R

SBi

R

Ti

R

RXi

C

VTXi

R

REF

R

SHB

, R

SLB

R

HLai

R

HLbi

R

HLci

, R

HLdi

C

HLbi

C

HLdi

C

SSi

R

MT1i

R

MT2i

R

LG1i

R

LG2i

R

REFSi

R

PMGi

R

TEST(i)

C

TESTA

,

C

TESTB

C

ADi

, C

BDi

C

VBH

, C

VBL

C

VBFi

C

VCC

C

VCCD

C

VCCA

R

VCCA

C

VRNi

Type

Le79232 device

Le79228x

Le75282

TISP4125H3

TISP4A250H3

B1250T

Resistor

Resistor

Resistor

Capacitor

Resistor

Resistor

Resistor

Resistor

Resistor

Capacitor

Capacitor

Capacitor

Resistor

Resistor

Resistor

Resistor

Resistor

Resistor

Resistor

Capacitor

Capacitor

Capacitor

Capacitor

Capacitor

Capacitor

Capacitor

Resistor

Capacitor

±125 V

+125 V,

-250 V

1.25 A

200 kΩ

80.6 kΩ

90.9 kΩ

100 nF

69.8 kΩ

750 kΩ

40.2 kΩ

4.32 kΩ

2.87 kΩ

3.3 nF

0.82

µF

33 or

56 pF

3.01 kΩ

75 kΩ

6.04 kΩ

150 kΩ

56.2 kΩ

510Ω

2 kΩ

1 nF

15 nF

100 nF

1 nF

100 nF

100 nF

33 µF

3.3

Ω

100 nF

1%

1%

1%

10%

1%

1%

1%

1%

1%

10%

10%

5%

1%

1%

1%

1%

1%

5%

1%

20%

10%

20%

20%

20%

20%

20%

1%

20%

600 V

1/2 W

1/16 W

1/16 W

50 V

1/16 W

1/16 W

1/16 W

1/16 W

1/16W

10 V

10 V

100 V

1/16 W

1/16 W

1/16 W

1/16 W

1/16 W

1W

1W

100 V

200 V

100 V

100 V

10 V

10 V

6.3 V

1/16 W

10 V

Tantalum

Value should be adjusted to suit

application

Test load, power rating assumes

intermittent operation per test algorithms

Test bus capacitors

Ceramic, X7R dielectric

Ceramic

Ceramic

Optional for testing

Refer to Le75282 data sheet

for applicability

Current reference setting resistor

Battery sense resistors

Feed resistor, see VHL networks for IVD

value

Metering resistor

Feed resistors, see VHL networks for IVD

values

Metering capacitor - Not Polarized

Feed capacitor -Ceramic

Metering capacitor -Ceramic, use 33 pF

for 3.2 Vrms max. or 56 pF for 5.0 Vrms

max. metering.

Metallic loop current gain resistor

Metallic loop current resistor for high gain

selection

Longitudinal loop current gain resistor

Longitudinal loop current resistor for high

gain selection

Required for testing, tie

RLG1i to VREF if not used

Required for testing, tie

RMT1i to VREF if not used

Only required for metering >

2.2 Vrms, otherwise omit

Required for metering

Required for metering

Value

Tol.

Rating

Comments

Dual ISLIC device

ISLAC device

LCAS device

Bourns

®

Overvoltage Protector or

equivalent

Bourns

®

Asymmetrical Overvoltage

Protector or equivalent

Bourns

®

Fuse

Sense resistors, pulse withstanding

component

Impedance control resistor

Receive path gain resistor

Optional Components

33

Zarlink Semiconductor Inc.