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參數(shù)資料
| 型號： | AM79R70 |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | Ringing Subscriber Line Interface Circuit |
| 中文描述： | 振鈴用戶線接口電路 |
| 文件頁數(shù)： | 17/17頁 |
| 文件大?。?/td> | 271K |
| 代理商： | AM79R70 |
P R E L I M I N A R Y
SLIC Products
17
APPLICATION CIRCUIT
REVISION SUMMARY
Revision A to Revision B
Minor changes were made to the data sheet style and format to conform to AMD standards.
Trademarks
Copyright
1998 Advanced Micro Devices, All rights reserved.
AMD, the AMD logo and combinations thereof are trademarks of Advanced Micro Devices, Inc.
DSLAC and QSLAC are trademarks of Advanced Micro Devices, Inc.
Product names used in this publication are for identification purposes only and may be trademarks of their respective companies.
Note:
The input should be 50% duty cycle CMOS-compatible input.
I. Application Circuit
+5 V
VNEG
VCC
R
D
66 k
RD
VTX
RSN
R
RX
250 k
R
DC2
50 k
C
DC
820 nF
R
DC1
50 k
C
DCR
R
T1
RDC
–5 V
VBAT1
DET
D
1
BGND
RYOUT1
HPB
HPA
RTRIP2
RTRIP1
BAT1
VBAT2
V
TX
V
RX
B2EN
D
2
BAT2
A(TIP)
B(RING)
0.1 μF
RYOUT2
RYE
C1
C2
C3
D1
D2
E1
R
DCR1
RDCR
AGND/
DGND
R
SLEW
150 k
C
SLEW
0.33 μF
RINGIN
R
open
R
SGL
open
RSGL
RSGH
R
RT1
515 k
R
RT2
12 k
C
RT
1.5 μF
15 k
See Note.
0.1 μF
125 k
125 k
R
DCR2
15 k
C
T
R
T2
10 nF
Assumptions:
1. 1.25 CF
2. 25 mA I
LOOP
3. 100 mA Ringing Current Limit
4. 5.2 k
High Battery Loop Threshold
5. 925
Ringing Loop Threshold
6. 600
Two-wire Impedance,
600
Z
L
BATTERY
GROUND
ANALOG
GROUND
DIGITAL
GROUND
Bat1
TISP
61089
7. G
42L
= 1
8. –67 V Vbat1, –24 V Vbat2
C
AX
= 2.2 nF
K1
K1
K2
K2
G
R
FA
= 50
TIP
R
FB
= 50
A
A
C
BX
= 2.2 nF
C
HP
18 nF
RING
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