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參數資料
| 型號： | AM7945 |
| 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： | 1/18頁 |
| 文件大小： | 157K |
| 代理商： | AM7945 |
Publication#
18408
Rev
: D
Amendment:
/0
Issue Date:
October 1999
Am7945
Subscriber Line Interface Circuit
DISTINCTIVE CHARACTERISTICS
I
Programmable constant-current feed
I
Current gain = 200
I
Programmable loop-detect threshold
I
Low power Standby state
I
Ground-key detector
I
Tip Open state for ground-start lines
I
–19 V to –56.5 V battery operation
I
On-chip Thermal Management (TMG) feature
I
Two-wire impedance set by single external
impedance
I
On-hook transmission
I
On-chip ring relay driver and relay snubber
circuit
I
Ideal for low cost PABX and key telephone
systems
BLOCK DIAGRAM
VCC
VEE
AGND/DGND
RSN
VTX
RD
RDC
CAS
C1
C2
C3
E0
E1
DET
Two-Wire
Interface
HPA
HPB
DA
DB
BGND
VBAT
A(TIP)
B(RING)
TMG
Ground-Key
Detector
Signal
Transmission
Off-Hook
Detector
Power-Feed
Controller
Ring-Trip
Detector
RINGOUT
Ring Relay
Driver
Input Decoder
and Control
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相關代理商/技術參數 |
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|---|---|
| AM7945JC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC |
| AM7946-1JC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Subscriber Line Interface Circuit |
| AM7946-2JC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC |
| AM7946-3JC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Subscriber Line Interface Circuit |
| AM7946-4JC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Subscriber Line Interface Circuit |
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