ISL5586FCM Intersil, ISL5586FCM Datasheet - Page 19

• Manufacturer Part Number: ISL5586FCM
• Description: Ringing Subscriber Interface
• Manufacturer: Intersil

Specifications of ISL5586FCM

• Package / Case: 28-PLCC

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
U1 - Ringing SLIC
R
R
R
R
R
R
C
C
CFB
C
C
C
C
C
C
D
D
R
Design Parameters: Ring Trip Threshold = 81mA
Impedance = (3*66.5kΩ)/400 = 498.8Ω, protection resistors = 50Ω, impedance across Tip and Ring terminals = 599Ω. Transient current
limit = 100mA.
TL
RT
SH
IL
S
P1
P
RT
DC
PS1
PS2
T1
R1
X1
1
2,
P1
D
, C
,R
, C
, C
, C
, R
3
, C
P2
T2
X2
POL
R2
P2
PS3
, C
, C
, C
X3
R3
SH
COMPONENT
19
TABLE 2. BASIC APPLICATION CIRCUIT COMPONENT LIST
PEAK
Protection resistor values are application dependent and will be determined by protection
requirements. Standard applications will use ≥ 49Ω per side.
, Switch Hook Threshold = 15mA, Loop Current Limit = 24.6mA, Synthesize Device
Not Populated
ISL5586
VALUE
3300pF
17.8kΩ
22.1kΩ
71.5kΩ
66.5kΩ
0.47µF
0.47µF
150pF
1.0µF
4.7µF
0.1µF
4.7µF
40kΩ
0Ω
ISL5586
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.
1N400X Type with Breakdown > 100V.
TOLERANCE
1N4935 Type
20%
20%
20%
20%
20%
20%
N/A
1%
1%
1%
1%
1%
1%
RATING
>100V
0.1W
0.1W
0.1W
0.1W
0.1W
0.1W
100V
10V
10V
10V
10V
N/A
November 3, 2004
FN4924.2