HC55171B Datasheet, PDF (10/11 Pages) Intersil Corporation – Low Cost 5 REN Ringing SLIC for ISDN Modem/TA and WL

HC55171B
Pinouts
HC55171B (PLCC)
TOP VIEW
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
I_LIMIT 11
19 V_TX
12 13 14 15 ₁₆ 17 ₁₈
HC55171B (SOIC)
TOP VIEW
AGND 1
V_CC 2
V_REF 3
F1 4
F0 5
RS 6
SHD 7
RTD 8
TST 9
ALM 10
I_LIMIT 11
OUT 1 12
-IN 1 13
TIP SENSE 14
28 RTI
27 V_BAT
26 RF
25 TF
24 V_RING
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
U1
R_S1
R_S2
C_PS1
C_PS2
V_CC
HC55171B
14
TIP SENSE
V_RX
25 _TF
26
RF
16 _{RING SENSE 2}
I_LIMIT
V_TX
15 _{RING SENSE 1}
-IN1
2
V_CC
15 _AGND
22 _BGND
27
V_BAT
OUT1
RTI
V_RING
4
F1
5
F0
6 _RS
9
TST
20
RDI
V_REF
SHD
RTD
ALM
17
11
R_IL2
R_IL1
19
C_AC
R_RF
13
12
R_ZO
C_RX
28
R_RT3
R_RT2
R_RT1
C_RT
D_RT
24
3 ^CIL
D_TRAP
R_TRAP
C_TRAP
7
8
10
V-REC
V-XMIT
V_RING
SHD
RTD
ALM
FIGURE 5. TRAPEZOIDAL RINGING APPLICATION CIRCUIT
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