HC55171 Datasheet, PDF (17/18 Pages) Intersil Corporation – 5 REN Ringing SLIC for ISDN Modem/TA and WLL

Pinouts
HC55171 (PLCC)
TOP VIEW
HC55171
4 3 2 1 28 27 26
F0 5
25 ^TF
RS 6
24 VRING
SHD 7
23 NU
RTD 8
22 BGND
TST 9
21 ^RDO
ALM 10
20 ^RDI
ILMT 11
19 V_TX
12 13 14 15 ₁₆ 17 ₁₈
HC55171 (SOIC)
TOP VIEW
AGND 1
V_CC 2
VREF 3
F1 4
F0 5
RS 6
SHD 7
RTD 8
TST 9
ALM 10
ILMT 11
OUT 1 12
-IN 1 13
TIP SENSE 14
28 RTI
27 V_BAT
26 RF
25 TF
24 VRING
23 NU
22 BGND
21 RDO
20 RDI
19 V_TX
18 NU
17 V_RX
16 RING SENSE 2
15 RING SENSE 1
Trapezoidal Ringing Application Circuit
TIP
RING
V_CC
V_BAT
F1
F0
TST
R_S1
R_S2
C_PS1
C_PS2
VCC
U1
HC55171
14 TIP SENSE
25 TF
V_RX 17
ILIMT 11
R_IL2
26 RF
16 RING SENSE 2 V_TX 19
15 RING SENSE 1
R_IL1
C_AC
R_RF
2 V_CC
1 AGND
-IN1 13
OUT1 12
RTI 28
R_ZO
R_RT2
22 BGND
R_RT3
C_RX
R_RT1
C_RT
D_RT
27 V_BAT
4 F1
5 F0
6 RS
9 TST
20 RDI
V_RING 24
V_REF 3
C_IL
D_TRAP
SHD 7
RTD 8
ALM 10
R_TRAP
C_TRAP
V-REC
V-XMIT
V_RING
SHD
RTD
ALM
FIGURE 21. TRAPEZOIDAL RINGING APPLICATION CIRCUIT
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