L3000S View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

L3000S

SUBSCRIBER LINE INTERFACE KIT

STMicroelectronics 

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L3000S - L3030

2) Parallel Mode

This operating mode is enabled connecting pin 33

to a voltagein the rangefrom 4V to 5V. Thefive wire

have the following functions :

- power down/feeding (EIA), entering at pin 18

- timing (CI), entering at pin 26

- ring (DCLK), entering at pin 21

- on-hook/off-hook(NCS), outgoing at pin 19

- ground-key (DIO), outgoing at pin 20

In this operating mode the signals at the inputs are

immediately executed,without any external clock ti-

ming ; all the internalregisters are bypassed.The in-

formations sent back on pins 19 and 20, display in

real time the setting of internal circuits, that means

line status. In the table 2 the correspondence bet-

ween the interface wires in the parallel mode and

equivalent bit in serial mode is pointed out ; where

there isn’t this correspondence, the internal setting

is shown.

Table 2 : Parallel Mode.

Pin

Rif.

Meaning (note 1)

18

EIA PD/feeding

26

CI Timing

21

DCKL Ring

19

NCS On-hook/off-hook

20

DIO Ground Key

Eq. Bit of Ser. Interf.

BIT0R

BIT1R

BIT2R

BIT3R

BIT4R

BIT5R

BIT6R

BIT7R

BIT0T

BIT1T

BIT2T

BIT3T

BIT4T

Value

0 : High Impedance

1 : Low Impedance

0 : Ring Timing Off

1 : Ring Timing On

0 : No Ring

1 : Ring Injection

0 : Low Amplitude

0 : Normal Polarity

0 : Normal Battery

0:

1:

Line Curr. = 30mA

0 : On-hook

1 : Off-hook

1 : Long. Curr. < 17mA

0 : Long. Curr. > 17mA

Note : 1. The description of the commands is referred to the system L3030 + LINE INTERFACE module.

DIGITAL INTERFACE ELECTRICAL CHARACTERISTICS

(VDD = + 5V, VSS = – 5V, Tamb. = 25oC) (refer to PLCC44 package)

Symbol

Parameter

Test Conditions

STATIC ELECTRICAL CHARACTERISTICS

Vil Input Voltage at Logical ”0”

Vih Input Voltage at Logical ”1”

Iil

Input Current at Logical ”0”

Pins 18, 19, 20, 21, 26

Vil = 0V

Iih Input Current at Logical ”1”

Vih = 5V

Vol Output Voltage at Logical ”0”

Voh Output Voltage at Logical ”1”

Ilk

Tristate Leak. Current

Pins 19, 20 Iout = – 1mA

Pins 19, 20 Iout = 1mA

Pin 20 NCS = ”1”

Min. Typ. Max. Unit

0

0.8

V

2.0

5

V

200

µA

10

µA

0.4

V

2.4

V

10

µA

14/29

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