L3030 STMicroelectronics, L3030 Datasheet - Page 15

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

DIGITAL INTERFACE ELECTRICAL CHARACTERISTICS (continued)
DYNAMIC ELECTRICAL CHARACTERISTICS
OPERATION DESCRIPTION
To set SLIC in operation the following parameters
have to be defined :
- the DC feedingresistance RFS, definedas the re-
- the AC impedanceat line terminals, ZML, to which
- the equivalent AC impedance of the line Zline,
sistance of each side of the traditional feeding sy-
stem (most common values are 200, 400 or 500
ohm).
the return loss measurement references.It can be
real (typically 600 ohm) or complex.
when evaluating the trans hybrid loss (2/4 wire
Twh, Twl
Symbol
Tr, Tf
Tec
Tsd
Thd
Tca
Tac
Tzd
Tce
Tdz
Tdd
Tsc
Tcs
fclk
Tis
Tsi
Clock Frequency
Clock Rise and Fall Time
Clock Impulse Width
CI to NCS Set up Time
”0” EIA to DCKL Set up Time
DCKL to NCS Delay (+ edge)
Data in Set up Time
Data in Hold Time
NCS to DCKL Hold Time
”0” EIA to DCKL Hold Time
”1” EIA to DCKL Set up Time
Data out to ”0” NCS Delay
”1” EIA to DCKL Hold Time
Data out to ”1” NCS Delay
Data out to DCKL Delay
”0” CI to NCS Hold Time
Parameter
Test Conditions
- the ringing signal frequency Fr (ST SLIC allows
- the metering pulse frequency Ft (two values are
- the value of the two resistors RP1/RP2 in series
On this assumptions,the following componentlistis
defined.
conversion). It is usually a complex impedance.
frequency ranging from 16 to 66Hz).
possible : 12kHz or 16kHz).
with the line terminals ; main purpose of the a.m.
resistors is to allow primary protection to fire. ST
suggest the minimum value of 50 ohm for each
side.
Min.
750
300
300
300
800
800
900
400
900
300
1
0
0
Typ.
L3000S - L3030
Max.
1500
600
600
500
50
Unit
kHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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