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參數(shù)資料
| 型號： | AM79M576A-2JC |
| 廠商： | ADVANCED MICRO DEVICES INC |
| 元件分類： | 模擬傳輸電路 |
| 英文描述： | Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????) |
| 中文描述： | TELECOM-SLIC, PQCC32 |
| 封裝： | PLASTIC, LCC-32 |
| 文件頁數(shù)： | 1/18頁 |
| 文件大小： | 252K |
| 代理商： | AM79M576A-2JC |
Publication#
18412
Issue Date:
October 1999
Rev:
D
Amendment: /
0
Am79M576A
Metering Subscriber Line Interface Circuit
DISTINCTIVE CHARACTERISTICS
I
Programmable constant-resistance feed
I
Programmable loop-detect threshold
I
Ground-key detect
I
Performs polarity reversal
I
Ring relay driver
I
Supports 2.2 Vrms metering (12 and 16 kHz)
I
Line feed characteristics independent of battery
variations
I
On-chip switching regulator for low-power
dissipation
I
Two-wire impedance set by single external
impedance
I
Tip Open state for ground-start lines
I
On-hook transmission
BLOCK DIAGRAM
VTX
RSN
DET
VREG
VBAT
Signal
Transmission
Input Decoder
and Control
Ground-Key
Detector
Ring Relay
Driver
Off-Hook Detector
Power-Feed
Controller
Ring-Trip
Detector
Switching
Regulator
RINGOUT/DGND
RD
RDC
L
Two-Wire
Interface
HPA
HPB
BGND
DA
DB
CHS
CHCLK
VEE
AGND/DGND
VCCRING
QBAT
VCC
C1
C2
C3
E0
E1
A(TIP)
B(RING)
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