Le79R241 Data Sheet
26
Zarlink Semiconductor Inc.
11.0 Line Card Parts List - Internal Ringing
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, 3, 4).
Notes:
1. Required to insure VBH < VBL during startup. May not be needed for some supplies.
2. DT2i is optional - Should be put if Le79R251 is used.
3. Value can be adjusted to suit application.
Item Type Value Tol. Rating Comments
U1
Le79R241 ISLIC
device
-
U2
VE790 series ISLAC
device
- codec
U3, U4, U5, U6 B1100CC - 100 V TECCOR Battrax protector
DT1
i
, DT2
i
Diode 1 A - 100 V
DH
i
1
, DL
i
, DT1
i
, DT2
i
, DLH
i
Diode 100 mA - 100 V 50 ns response time
RFA
i
, RFB
i
Resistor 50 2% 2 W Fusible or PTC protection resistors
RSA
i
, RSB
i
Resistor 200 k 2% 1/4 W Sense resistors
RT
i
Resistor 80.6 k 1% 1/8 W Impedance control resistor
RRX
i
Resistor 90.9 k 1% 1/8 W Receive path gain resistor
RREF Resistor 69.8 k 1% 1/8 W Current reference setting resistor
RSHB, RSLB, RSPB Resistor 750 k 1% 1/8 W Battery sense resistors
RHLa
i
Resistor 40.2 k 1% 1/10 W Feed/metering resistor
RHLb
i
Resistor 4.32 k 1% 1/10 W Feed/metering resistor
RHLc
i
Resistor 2.87 k 1% 1/10 W Feed/metering resistor
RHLd
i
Resistor 2.87 k 1% 1/10 W Feed/metering resistor
CHLb
i
Capacitor 3.3 nF 10% 10 V Feed/metering capacitor - Not Polarized
CHLd
i
Capacitor 0.82 F 10% 10 V Feed/metering capacitor -Ceramic
RMT
i
Resistor 3.01 k 1% 1/8 W Metallic loop current gain resistor
RLG
i
Resistor 6.04 k 1% 1/8 W Longitudinal loop current gain resistor
RTEST Resistor 2 k 1% 1 W Test board
CAD
i
, CBD
i
2
Capacitor 22 nF 10% 100 V Ceramic
CBATH
i
, CBATL
i
, CBATP
i
Capacitor 100 nF 20% 100 V Ceramic
CHP
i
Capacitor 22 nF 20% 100 V High pass filter capacitor - Ceramic
CS1
i
, CS2
i
2
Capacitor 100 nF 20% 100 V Protector speed up capacitor
RMGL
i
Resistor 1 k 5% 2 W Thermal management resistor
RMGP
i
Resistor 1 k 5% 2 W Thermal management resistor
