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參數資料
| 型號： | MH89625C-6 |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | OPS/DID PCM SLIC Preliminary Information |
| 中文描述： | 老年退休金計劃/沒有的PCM用戶接口的初步信息 |
| 文件頁數： | 1/16頁 |
| 文件大小： | 150K |
| 代理商： | MH89625C-6 |
2-269
Features
Input impedance variants:
- 600
- 200
+ 680
// 0.1
μ
F
- 200
+ 560
// 0.1
μ
F
Operates with a wide range of battery voltages
Constant current battery feed with constant
voltage fallback for long loop drive capabilities
Overvoltage and short circuit protection
Off-hook detection and LED indicator drive
Dial pulse detection
Ring trip filter with auto ring trip
Ring relay driver plus three more uncommitted
relay drivers
Transformerless 2W to 4W conversion
A/D and D/A conversion
Conforms to A-Law PCM
Analog and digital loopback
Conforms to CCITT k.20 overvoltage surge
requirements with external primary protection
circuitry
Applications
Off premise digital PBX line cards
DID (Direct Inward Dial) line cards
PABX, Key Systems, Central Office Equipment
Description
The Mitel MH89625C SLIC (Subscriber Line
Interface Circuit) provides a complete interface
between an off-premise telephone line and a digital
switching system. All BORSCHT functions of Battery
Feed, Overvoltage Protection, Ringing Feed, Line
Supervision, Codec, 2-4 Wire Hybrid and Test are
provided requiring only a few external components.
The input impedance conforms with Chinese
standard requirements. The device is fabricated
using thick film hybrid technology which incorporates
various technologies for high voltage capability,
optimum circuit design and very high reliability.
Figure 1 - Functional Block Diagram
TIP
RING
RF2
RF1
VBat
LGND
LCA
GS
VREF
CA
DSTo
DSTi
CSTi
F1i
C2i
RD4
RD3
RD2
RD1
SHK
LED
Gain
Adjust
2w/4w
hybrid
Impedance
Matching
Relay
Driver 1
Relay
Driver 2
Relay
Driver 3
Relay
Driver 4
Line
Supervision
Ring
Trip
Filter
Tip
Drive
Current
& Voltage
Sensing
Ring
Drive
Constant
Current &
Voltage
Control
VREF
CADSTo
DSTi
CSTi
F1i
CS
SD3
SD2
SD1
SD0
CODEC
VX
VR
ISSUE 4
May 1995
Ordering Information
MH89625C
MH89625C- 5
MH89625C- 6
600
200
+ 680
// 0.1
μ
F
200
+ 560
// 0.1
μ
F
40 Pin DIL Package
MH89625C
OPS/DID PCM SLIC
Preliminary Information
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