LE57D121BTC Zarlink, LE57D121BTC Datasheet - Page 19

• Manufacturer Part Number: LE57D121BTC
• Description: SLIC 2-CH 67dB 120mA 5V 44-Pin LQFP EP Tray
• Manufacturer: Zarlink

Specifications of LE57D121BTC

• Package: 44LQFP EP
• Number Of Channels Per Chip: 2
• Polarity Reversal: Yes
• Longitudinal Balanced: 67 dB
• Loop Current: 120 mA
• Minimum Operating Supply Voltage: 4.75 V
• Typical Operating Supply Voltage: 5 V
• Typical Supply Current: 9.3 mA

APPLICATION CIRCUIT PARTS LIST (POTS WITH NO METERING)
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).
Notes:
1.
2.
3.
4.
5.
6.
7.
8.
R
R
R
R
R
C
C
R
Protector
C
C
C
D
R
R
R
R
R
R
C
C
C
C
C
C
R
U1
RTH1
SR1
SR2
RTH2
R1
TH
RT1
FA1
S1
BAT
VCC
VBH
TMG1
REF
D
HP1
T1
RX1
AD1
HP1
VTX1
VRX1
DC1
CAS
TX1,
, R
In case of single, one for each channel. In case of dual, one for one Le5712 Dual SLIC.
Consult protector vendor for recommended value. One for one protector device.
A Schottky diode with a voltage drop of 0.4V is desirable if Tip to battery fault is concerned.
Value was chosen to use resistor with 5% tolerance and 1 W rating. See "Thermal Management for the Le5711 and Le5712 Dual SLIC
Device" for further details.
Sets the current limit at 33 mA.
Sets an off-hook detection threshold of 11 mA.
RHP will enhance dial pulse crosstalk performance. RHP being 15 k will make G24 from being 1/3 to 1/3.0841. RHB should be present in
WinSLAC™ simulations.
, C
, R
R
, R
, C
, R
, R
, R
, R
, C
, C
, C
TX
R
, C
, C
T2
S2
, R
R2
TX2
FB1,
RT2
SR3
SR4
HP2
RX2
BD1
HP2
DC2
is optional and is required if C
VTX2
VRX2
TMG2
Item
, C
R
FA2A
AD2
, C
R
FB2
BD2
Quantity
1 or 2
1 or 2
1
2
2
1
2
1
2
4
1
1
1
2
1
1
2
2
2
4
2
2
2
2
1
2
1
VTX
SMT
SMT
SMT
SMT
Resistor Hybrid
Capacitor (X7R)
Capacitor (X7R)
Resistor Hybrid or PTC
Battery referenced thyristor
Capacitor (X7R)
Capacitor (X7R)
Capacitor (X7R)
MURS 120 (D0-41) DIODE
SMT
SMT
SMT
SMT
SMT
SMT
Capacitor (X7R)
Capacitor (X7R)
Capacitor (X7R)
Capacitor (X7R)
Capacitor (X7R)
Capacitor (X7R)
SMT
Le5712x
is greater than 0.01µF.
Fault Protection and Power Supplies
Ringing and Ring Trip Sensing
Other Components
Type
Zarlink Semiconductor Inc.
19
0.047 µF
0.022 µF
1.82 MΩ
14.3 kΩ
82.5 kΩ
15.0 kΩ
75.0 kΩ
2.00 kΩ
0.01 µF
0.33 µF
0.33 µF
909 kΩ
100 kΩ
1.8 kΩ
0.1 µF
0.1 µF
0.1 µF
0.1 µF
0.1 µF
0.1 µF
Value
400 Ω
1 MΩ
2 MΩ
50 Ω
20%
20%
20%
20%
20%
20%
20%
20%
20%
20%
20%
Tol.
1%
1%
1%
1%
5%
1%
5%
1%
1%
1%
1%
1%
1%
Rating
1/16 W
1/16 W
1/16 W
1/16 W
1/16 W
1/16 W
1/16 W
1/16 W
1/16 W
1/16 W
100 V
100 V
100 V
100 V
100 V
50 V
50 V
10 V
10 V
10 V
2 W
1 W
5 V
Note
1
2
3
4
5
6
7
8