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| HC5503T_04 Datasheet, PDF (5/6 Pages) Intersil Corporation – Balanced PBX / Key System SLIC, Subscriber Line Interface Circuit | |||
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Applications Diagram
HC5503T
TIP
K1A
RB1
PRIMARY
SUBSCRIBER PROTECTION
LOOP
(NOTE 4)
RING
K1A
RB3
PTC
SYSTEM CONTROLLER
5V 7
RS
13
SHD
C5
24
TX
1
TIP
RB2 9
TIP FEED
SLIC
HC5503T
C4
21
RX
T3 20
VBAT
10
RB4
2
RING FEED
RING
VBAT BGND
11
12
C2
DGND AGND
6
23
19
T2
18
T1
C1 5
VCC
C1
C3 3
-48V
VCC
Z1
-48V
RING GENERATOR
PIN NUMBERS GIVEN FOR SOIC PACKAGE.
FIGURE 1. TYPICAL LINE CIRCUIT APPLICATION WITH THE MONOLITHIC SLIC
Typical Component Values
C1 = 0.3µF, 30V, ± 20%.
C4 = 0.5µF, 20V, ± 20%.
C2 = 0.01µF, 100V,± 20%.
C5 = 0.5µF, 30V, ± 20%.
C3 = 0.01µF, 20V, ± 20%.
RB1 = RB2 = RB3 = RB4 = 150â¦.
PTC used as ring generator ballast.
NOTES:
4. Secondary protection diode bridge recommended is a 2A, 200V type.
5. All grounds (AG, BG, and DG) must be applied before VCC or VBAT. Failure to do so may result in premature failure of the part. If a user wishes
to run separate grounds off a line card, the AG must be applied first.
6. Application shows Ring Injected Ringing.
5
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