L3030 STMicroelectronics, L3030 Datasheet - Page 14

• Manufacturer Part Number: L3030
• Description: SUBSCRIBER LINE INTERFACE KIT
• Manufacturer: STMicroelectronics

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
Table 2 : Parallel Mode.
Note :
DIGITAL INTERFACE ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
14/29
(V
Symbol
Pin
DD
18
26
21
19
20
Voh
Vih
Vol
Vil
Iih
Ilk
Iil
= + 5V, V
1. The description of the commands is referred to the system L3030 + LINE INTERFACE module.
DCKL
NCS
Input Voltage at Logical ”0”
Input Voltage at Logical ”1”
Input Current at Logical ”0”
Input Current at Logical ”1”
Output Voltage at Logical ”0”
Output Voltage at Logical ”1”
Tristate Leak. Current
DIO
Rif.
EIA
CI
SS
= – 5V, T
PD/feeding
Timing
Ring
On-hook/off-hook
Ground Key
Parameter
Meaning (note 1)
amb
. = 25
o
C) (refer to PLCC44 package)
Pins 18, 19, 20, 21, 26
Vil = 0V
Vih = 5V
Pins 19, 20 Iout = – 1mA
Pins 19, 20 Iout = 1mA
Pin 20 NCS = ”1”
Eq. Bit of Ser. Interf.
Test Conditions
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.
BIT0R
BIT1R
BIT2R
BIT3R
BIT4R
BIT5R
BIT6R
BIT7R
BIT0T
BIT1T
BIT2T
BIT3T
BIT4T
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 :
0 : On-hook
1 : Off-hook
1 : Long. Curr. < 17mA
0 : Long. Curr. > 17mA
Min.
2.0
2.4
0
Line Curr. = 30mA
Typ.
Value
Max.
200
0.8
0.4
10
10
5
Unit
V
V
V
V
A
A
A