Le79R241 Data Sheet
28
Zarlink Semiconductor Inc.
12.0 Line card Parts List - External 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
U5 TISP61089 80 V
Transient Voltage Suppressor, Power
Innovations
DLH
i
1
, DH
i
, DL
i
, DT1
i
DT2i
2
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
RMGL
i
, RMGP
i
Resistor 1 k 5% 1 W Thermal management resistors
RSHB, RSLB 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 2.49 k 1% 1/10 W
Use 2.87kin metering
Feed/Metering resistor
RHLd
i
Resistor 2.49 k 1% 1/10 W
Use 2.87kin metering
Feed/Metering resistor
CHLb
i
Capacitor 3.3 nF 10% 10 V Feed/Metering capacitor - Not Polarized
CHLd
i
Capacitor 0.82 µF 10% 10 V Feed/Metering capacitor - Ceramic
RMT
i
Resistor 3.01 k 1% 1/8 W Metallic Current Sense Resistors
RLG
i
Resistor 6.04 k 1% 1/8 W Longitudinal Current Sense Resistors
RTEST Resistor 2 k 1% 1 W Test board
CAD
i
, CBD
i
3
Capacitor 22 nF 10% 100 V Ceramic
CBATH
i
, CBATL
i
Capacitor 100 nF 20% 100 V Ceramic
CHP
i
Capacitor 22 nF 20% 100 V Ceramic
CS
i
3
Capacitor 100 nF 20% 100 V Protector speed up capacitor
RGFD
i
Resistor 510 2% 2 W 1.2 W typ
RSRB
i
, RSRC
Resistor 750 k 1% 1/4 W External Ringing sense resistors
KR
i
Relay 5 V Coil DPDT
