le9502 Zarlink Semiconductor, le9502 Datasheet - Page 3

• Manufacturer Part Number: le9502
• Description: Ringing Subscriber Line Interface Circuit
• Manufacturer: Zarlink Semiconductor

PRODUCT DESCRIPTION
The VE950 series Le9502 RSLIC device uses reliable, dielectrically isolated, fully complementary bipolar technology to
implement BORSCHT functions for short loop applications. Internal power dissipation is minimized by two independent line
voltage tracking, buck-boost switching regulators. Two power supplies are required: 3.3 V and a positive supply (V
level clock is required to drive the switching regulator. Five programmable states control loop signaling, transmission, and ringing.
The Le9502 RSLIC device DC current feed limit (I
BLOCK DESCRIPTIONS
Figure 1. Typical Le9502 RSLIC/Codec Application in an 8-Port Integrated Access Device in Customer Premises
1
8
RSLIC
RSLIC
RSLIC
RSLIC
Dual
Dual
Dual
Dual
Codec
Codec
Codec
Codec
B
B
1
2
A
A
(RING)
VREG
VRAMP
VREG
(RING)
1
2
CHS
CHS
VSW
(TIP)
ISET
(TIP)
ILS
ILS
SD
SD
Figure 2. Le9502 RSLIC Device Block Diagram
1
1
1
1
2
2
2
2
Din
Dout
DCLK/CS
PCM I/F
BGND
1
Two-Wire
Controller
Controller
Two-Wire
Detection
Detection
Interface
Interface
Switcher
Switcher
SC
Ethernet USB HomePNA
Fault
Fault
Zarlink Semiconductor Inc.
) is resistor-programmable up to 45 mA.
Dout
Din
BGND
DSP +
Network
Processor
Data Interfaces
2
Generator
Current
Ref
AGND
3
Transmission
Transmission
Conditioning
Conditioning
VCC
Signal
Signal
Signal
Signal
Control
Control
Logic
Logic
MODEM
F
VRINGM
VRINGP
VINP
VINM
VOUT
VHP
CFILT
LPF
DET
RTRIP
RDC
C1
C2
C1
C2
DET
RTRIP
VINP
VINM
VOUT
VHP
CFILT
LPF
F
1
2
1
1
2
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
Loop/Cable
WLL
DSLAM/
HEADEND
SW
). A TTL-