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參數資料
| 型號： | AM79535-1DC |
| 廠商： | ADVANCED MICRO DEVICES INC |
| 元件分類： | 模擬傳輸電路 |
| 英文描述： | Subscriber Line Interface Circuit |
| 中文描述： | TELECOM-SLIC, CDIP28 |
| 封裝： | CERAMIC, DIP-28 |
| 文件頁數： | 1/20頁 |
| 文件大小： | 266K |
| 代理商： | AM79535-1DC |
Publication#
16854
Issue Date:
October 1999
Rev:
D
Amendment: /
0
Am79534/Am79535
Subscriber Line Interface Circuit
DISTINCTIVE CHARACTERISTICS
I
Programmable constant-current 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
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
Two-Wire
Interface
HPA
HPB
DA
DB
BGND
VBAT
A(TIP)
B(RING)
Ground-Key
Detector
Signal Transmission
Power-Feed
Controller
Ring-Trip Detector
VCC
VEE
AGND
RINGOUT
C1
C2
C3
C4
E1
E0
DET
RSN
VTX
RD
RDC
Ring Relay Driver
Input Decoder
and Control
Off-Hook Detector
Test Relay Driver
TESTOUT
GKFIL
Switching Regulator
VREG
L
CHS
QBAT
CHCLK
Notes:
1. Am79534—E0 and E1 inputs; ring and test relay drivers sourced internally to BGND.
2. Am79535—E0 and E1 inputs; ring relay driver sourced internally to BGND; ground-key filter pin.
3. Current gain (K
1
) = 1000 for all parts.
16854C-01
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