L3000S View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'L3000S' PDF : 29 Pages View PDF
L3000S - L3030
DIGITAL INTERFACE ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
DYNAMIC ELECTRICAL CHARACTERISTICS
fclk
Tr, Tf
Twh, Twl
Tis
Tec
Tsc
Tsd
Thd
Tcs
Tca
Tac
Tzd
Tce
Tdz
Tdd
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
1
600 kHz
50
ns
750
ns
300
ns
300
ns
300
ns
0
ns
800
ns
800
ns
900
ns
400
ns
0
600
ns
900
ns
500
ns
1500 ns
300
ns
OPERATION DESCRIPTION
To set SLIC in operation the following parameters
have to be defined :
- the DC feedingresistance RFS, definedas the re-
sistance of each side of the traditional feeding sy-
stem (most common values are 200, 400 or 500
ohm).
- the AC impedanceat line terminals, ZML, to which
the return loss measurement references.It can be
real (typically 600 ohm) or complex.
- the equivalent AC impedance of the line Zline,
when evaluating the trans hybrid loss (2/4 wire
conversion). It is usually a complex impedance.
- the ringing signal frequency Fr (ST SLIC allows
frequency ranging from 16 to 66Hz).
- the metering pulse frequency Ft (two values are
possible : 12kHz or 16kHz).
- the value of the two resistors RP1/RP2 in series
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.
On this assumptions,the following componentlistis
defined.
15/29
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