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參數(shù)資料
| 型號： | AM79574 |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | Subscriber Line Interface Circuit |
| 中文描述： | 用戶線接口電路 |
| 文件頁數(shù)： | 1/17頁 |
| 文件大小： | 162K |
| 代理商： | AM79574 |
Publication#
16855
Issue Date:
October 1999
Rev:
E
Amendment: /
0
Am79574
Subscriber Line Interface Circuit
DISTINCTIVE CHARACTERISTICS
I
Programmable constant resistance feed
I
Line-feed characteristics independent of
battery variations
I
Programmable loop-detect threshold
I
On-chip switching regulator for low-power
dissipation
I
Pin for external ground-key noise filter
capacitor available
I
Ground-key detect option available
I
Two-wire impedance set by single external
impedance
I
Polarity reversal feature
I
Tip Open state for ground-start lines
I
Test relay driver optional
I
On-hook transmission
BLOCK DIAGRAM
VTX
RSN
RD
RDC
C1
C2
C3
C4
E1
E0
DET
Input Decoder
and Control
Two-Wire
Interface
Switching
Regulator
Test Relay Driver
Ring Relay Driver
RINGOUT
TESTOUT
GKFIL
A(TIP)
HPA
HPB
DA
DB
L
BGND
CHS
CHCLK
AGND
16855C-001
Signal
Transmission
Power-Feed
Controller
Off-Hook
Detector
Ground-Key
Detector
Ring-Trip Detector
Notes:
1. Am79574—E0 and E1 inputs; ring and test relay drivers sourced internally to BGND.
2. Output amplifier current gain (K
1
) = 1000.
B(RING)
VREG
VBAT
QBAT
VCC
VEE
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AM79574-1JC | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Subscriber Line Interface Circuit |
| AM79574-2JC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC |
| AM79574JC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Subscriber Line Interface Circuit |
| AM79578-1JC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC |
| AM79578-2JC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC |
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