HC5515 Datasheet, PDF (16/17 Pages) Intersil Corporation – ITU CO/PABX SLIC with Low Power Standby

HC5515
Pin Descriptions (Continued)
PLCC PDIP SYMBOL
DESCRIPTION
20
22
21
1
22
2
23
3
HPR
HPT
RD
DT
RING side of AC/DC separation capacitor C_HP. C_HP is required to properly separate the ring AC current from the DC
loop current. The other end of C_HP is connected to HPT.
TIP side of AC/DC separation capacitor C_HP. C_HP is required to properly separate the tip AC current from the DC loop
current. The other end of C_HP is connected to HPR.
Loop current programming resistor. Resistor R_D sets the trigger level for the loop current detect circuit. A filter capacitor
C_D is also connected between this pin and V_EE.
Input to ring trip comparator. Ring trip detection is accomplished by connecting an external network to a comparator
in the SLIC with inputs DT and DR.
25
4
DR
Input to ring trip comparator. Ring trip detection is accomplished by connecting an external network to a comparator
in the SLIC with inputs DT and DR.
26
TIP_SENSE Internally connected to output of tip power amplifier.
27
5
TIPX Output of tip power amplifier.
28
6
RINGX Output of ring power amplifier.
3, 10
17, 24
N/C
No internal connection.
Pinouts
HC5515
(PLCC)
TOP VIEW
HC5515
(PDIP)
TOP VIEW
4 3 2 1 28 27 26
RINGRLY 5
V_BAT 6
R_SG 7
NC 8
E0 9
N/C 10
DET 11
25 DR
24 N/C
23 DT
22 RD
21 HPT
20 HPR
19 V_TX
HPT 1
RD 2
DT 3
DR 4
TIPX 5
RINGX 6
BGND 7
V_CC 8
RINGRLY 9
V_BAT 10
R_SG 11
22 HPR
21 V_TX
20 V_EE
19 RSN
18 AGND
17 R_DC
16 C1
15 C2
14 DET
13 E0
12 NC
12 13 14 15 16 17 18
70