參數(shù)資料
型號： LE79R251JC
英文描述： Telecommunication IC
中文描述： 通信集成電路
文件頁數(shù)： 6/22頁
文件大?。?/td> 533K
代理商： LE79R251JC
P R E L I M I N A R Y
6
Le79R251 ISLIC Data Sheet
FEATURES OF THE INTELLIGENT ACCESS CHIPSET
CHIPSET BLOCK DIAGRAM - FOUR CHANNEL LINE CARD EXAMPLE
Performs all battery feed, ringing, signaling, hybrid and
test (BORSCHT) functions
Two chip solution supports high density, multi-channel
architecture
Single hardware design meets multiple country require-
ments through software programming of:
–
Ringing waveform and frequency
–
DC loop-feed characteristics and current-limit
–
Loop-supervision detection thresholds
–
Off-hook debounce circuit
–
Ground-key and ring-trip filters
–
Off-hook detect de-bounce interval
–
Two-wire AC impedance
–
Transhybrid balance
–
Transmit and receive gains
–
Equalization
–
Digital I/O pins
–
A-law/μ-law and linear selection
Supports internal and external battery-backed ringing
–
Self-contained ringing generation and control
–
Supports external ringing generator and ring relay
–
Ring relay operation synchronized to zero crossings
of ringing voltage and current
–
Integrated ring-trip filter and software enabled man-
ual or automatic ring-trip mode
Supports metering generation with envelope shaping
Smooth or abrupt polarity reversal
Adaptive transhybrid balance
–
Continuous or adapt and freeze
Supports both loop-start and ground-start signaling
Exceeds LSSGR and CCITT central office requirements
Selectable PCM or GCI interface
–
Supports most available master clock frequencies
from 512 kHz to 8.192 MHz
On-hook transmission
Power/service denial mode
Line-feed characteristics independent of battery voltage
Only 5 V, 3.3 V and battery supplies needed
Low idle-power per line
Linear power-feed with intelligent power-management
feature
Compatible with inexpensive protection networks;
Accommodates low-tolerance fuse resistors while main-
taining longitudinal balance
Monitors two-wire interface voltages and currents for
subscriber line diagnostics
Built-in voice-path test modes
Power-cross, fault, and foreign voltage detection
Integrated line-test features
–
Leakage
–
Line and ringer capacitance
–
Loop resistance
Integrated self-test features
–
Echo gain, distortion, and noise
Guaranteed performance over commercial and industrial
temperature ranges.
Up to three relay drivers per ISLIC device
–
Configurable as test load switches
RC
Networks
and
Protection
A1
B1
B3
A3
B2
A2
A4
B4
VCCA
Quad
ISLAC
Am79Q2243
Am79R251
Am79R251
Am79R251
Am79R251
LD1
VREF
LD2
LD3
LD4
P1-P3
AGND1
AGND2
VCCD
DXA/DU
DRB
DRA/DD
IO(1-4)
DGND2
DGND1
DXB
DCLK/S0
PCLK/FS
MCLK
FS/DCL
DIO/S1
INT
TSCA/G
TSCB
CS/RST
BATH
3
7
7
7
7
4
4
RREF
RSHB
BATL
RSLB
BATP
RSPB
相關(guān)PDF資料
PDF描述
LEA20033 ASIC
LEA20040 ASIC
LEA20046 ASIC
LEA20056 ASIC
LEA20066 ASIC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LE79R70-1DJC 制造商:Microsemi Corporation 功能描述:SLIC 1CH 40DB 110MA 5V 32PLCC - Rail/Tube 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC SLIC 1CH 40DB LGBAL 32PLCC
LE79R70-1DJCT 制造商:Microsemi Corporation 功能描述:1CH SLIC 40DB LGBAL P RV PL32TR 制造商:Microsemi Corporation 功能描述:SLIC 1CH 40DB 110MA 5V 32PLCC - Tape and Reel 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC SLIC 1CH 40DB LGBAL 32PLCC 制造商:Microsemi Corporation 功能描述:IC SLIC 1CH 40DB LGBAL 32PLCC
LE79R70-1FQC 制造商:Microsemi Corporation 功能描述:SLIC 1CH 40DB 110MA 5V 32QFN EP - Trays 制造商:Microsemi Corporation 功能描述:SINGLE SLIC SHORT LOOP LONG-BAL POL REV 制造商:Zarlink Semiconductor Inc 功能描述:SINGLE SLIC SHORT LOOP LONG-BAL POL REV
LE79R70-1FQCT 制造商:Microsemi Corporation 功能描述:SLIC 1CH 40DB 110MA 5V 32QFN EP - Tape and Reel
LE79R70DJC 制造商:Microsemi Corporation 功能描述:SLIC 1CH 40DB 110MA 5V 32PLCC - Rail/Tube 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC SLIC 1CH 40DB LGBAL 32PLCC 制造商:Microsemi Corporation 功能描述:IC SLIC 1CH 40DB LGBAL 32PLCC
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*