Datasheet > L9217A

L9217A

更新时间： 2024-11-10 22:31:39

品牌	Logo	应用领域
杰尔 - AGERE		电池
页数	文件大小	规格书
30页	398K
描述
Low-Cost Line Interface with Reverse Battery and PPM

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L9217A 数据手册

Data Sheet

November 2001

L9217A/G Low-Cost Line Interface

with Reverse Battery and PPM

Features

Description

■ Basic forward/reverse battery SLIC functionality at

This general-purpose electronic subscriber loop

a low cost

interface circuit (SLIC) is optimized for low cost, while

still providing a satisfactory set of features. This part

is a pin-for-pin replacement for the Agere L9218/

L9219 SLIC.

■ Pin compatible with Agere Systems Inc. L9218/

L9219 SLIC

■ Low active power (typical 154 mW during on-hook

transmission)

The L9217 requires a 5 V power supply and single

battery to operate. This device offers forward and

reverse battery operation. The rate of battery rever-

sal may be ramped to meet international require-

ments. Additionally, a low-power scan mode, wherein

all circuitry except the off-hook supervision is shut

down to conserve power, is available.

■ Low-power scan mode for low-power, on-hook

power dissipation (57 mW typical)

■ Distortion-free, on-hook transmission

■ Convenient operating states:

— Forward powerup

— Reverse powerup

— Low-power scan

— Disconnect (high impedance)

— PPM operational states

The dc current limit may be programmed via a single

external resistor. Both the loop supervision and ring

trip supervision functions are offered with user-

controlled thresholds via external resistors. Over-

head is adequate for 3.14 dBm into 900 Ω of on-hook

transmission.

■ Minimal external components required

■ Two gain options to optimize the codec interface

The device is periodic pulse metering (PPM) compat-

ible, offering a convenient point for meter pulse injec-

tion and filter point for rejection of the meter pulse

signal. In the PPM active modes, overhead voltage is

automatically increased to accommodate on-hook

transmission of meter pulse signals. The level that

the overhead is increased to is set by a single exter-

nal resistor. In this way, the L9217 can accommodate

high-voltage meter pulse signals.

■ Adjustable supervision functions:

— Off-hook detector with hysteresis

— Ring trip detector

■ Adjustable loop current limit

■ Adjustable overhead voltage

■ Ramped rate of battery reversal

■ Periodic pulse metering (PPM) compatible

The L9217 is offered with a receive gain that is opti-

mized to interface to a first-generation type codec

(L9217A). It is also offered with a gain option that is

optimized to interface to a third- or fourth-generation

type codec (L9217G). In both cases, minimizing

external components is required at this interface.

■ Thermal protection with thermal shutdown indica-

tion

Data control is via a parallel data control scheme.

The device is available in a 28-pin PLCC package. It

is built by using a 90 V complementary bipolar

(CBIC) process.

12 3 4 5 6 7...30

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与L9217A相关器件

型号	品牌	获取价格	描述	数据表
L9218A	AGERE	获取价格	Low-Cost Line Interface
L9219A	AGERE	获取价格	Low-Cost Line Interface with Reverse Battery and Dual Current Limit
L9222	STMICROELECTRONICS	获取价格	QUAD INVERTING TRANSISTOR SWITCH
L9222_04	STMICROELECTRONICS	获取价格	QUAD INVERTING TRANSISTOR SWITCH
L9222D	STMICROELECTRONICS	获取价格	1.2A 4 CHANNEL, AND GATE BASED PRPHL DRVR, PDSO20, SO-20
L9222-D	STMICROELECTRONICS	获取价格	QUAD INVERTING TRANSISTOR SWITCH
L9222D013TR	STMICROELECTRONICS	获取价格	L9222D013TR
L9230	STMICROELECTRONICS	获取价格	SPI CONTROLLED H-BRIDGE
L9230DIE1	STMICROELECTRONICS	获取价格	SPI CONTROLLED H-BRIDGE
L9230-DIE1	STMICROELECTRONICS	获取价格	SPI CONTROLLED H-BRIDGE

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