ISL5586 Datasheet, PDF (19/20 Pages) Intersil Corporation – Low Power Ringing SLIC for Home Gateways

ISL5586
TABLE 2. BASIC APPLICATION CIRCUIT COMPONENT LIST
COMPONENT
VALUE
TOLERANCE
RATING
U1 - Ringing SLIC
ISL5586
N/A
N/A
R_TL
R_RT
R_SH
R_IL
R_S
R_P1,R_P2
C_P
C_RT, C_POL , C_SH
CFB
17.8kΩ
22.1kΩ
40kΩ
71.5kΩ
66.5kΩ
0Ω
Not Populated
0.47µF
1.0µF
1%
1%
1%
1%
1%
1%
20%
20%
20%
0.1W
0.1W
0.1W
0.1W
0.1W
0.1W
10V
10V
10V
C_DC
C_PS1
C_PS2, C_PS3
C_T1, C_T2
C_R1, C_R2, C_R3
C_X1, C_X2, C_X3
D₁
D_2,D₃
R_P1, R_P2
4.7µF
20%
10V
0.47µF
20%
>100V
0.1µF
20%
100V
4.7µF
3300pF
150pF
1N400X Type with Breakdown > 100V.
1N4935 Type
Protection resistor values are application dependent and will be determined by protection
requirements. Standard applications will use ≥ 49Ω per side.
Design Parameters: Ring Trip Threshold = 81mA_PEAK, Switch Hook Threshold = 15mA, Loop Current Limit = 24.6mA, Synthesize Device
Impedance = (3*66.5kΩ)/400 = 498.8Ω , protection resistors = 50Ω, impedance across Tip and Ring terminals = 599Ω. Transient current
limit = 100mA.
Interface Diagram
The figure 15 above shows the electrical interface between
the ISL5586 and the BCM3352. Only a single channel is
shown to simplify the diagram. This diagram only shows
electrical interfaces and pertinent external components
Receive Interface
The receive interface of the BCM3352 is directly coupled to
the ISL5586 differential receive input. External filter
capacitors are provided to minimize noise from the
BCM3352. The ISL5586 is designed with a 4-wire to 2-wire
gain of +2.98dB.
Transmit Interface
The differential transmit output of the ISL5586 is AC coupled
to an external passive network. The external passive
network accomplishes many tasks. First, it filters the noise
which may exist on the CMLEVEL output of the BCM3352.
Second, it biases the ground referenced output signals of
the ISL5586 to the CMLEVEL of the BCM3352. Lastly, the
external network attenuates the signal levels coming from
the ISL5586. The ISL5586 is designed with a 2-wire to 4-
wire gain of 0dB and a 4-wire to 4-wire gain of +2.98dB.
Ringing Interface
The ISL5586 only passes the ringing signal on VRSP, VRSM
to Tip and ring only during the ringing mode. Therefore, a
single ringing generator as supplied by the BCM3352 drives
all four sets of ringing inputs in the Broadcom reference
design. The ISL5586 is designed with a differential ringing
gain of 100V/V.
Passive Component Values
The passive component values in the Broadcom reference
design may not be reflected by this document. Please refer
to the Broadcom reference design documentation for the
most recent schematic and COM information.
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