HT0638LG-G

更新时间： 2024-02-18 21:47:55

品牌	Logo	应用领域
超科 - SUPERTEX		模拟IC 开关信号电路电子
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HT0638LG-G 数据手册

HT0638

Electronic Line Switch

Features

General Description

❑ 15Ω maximum switch resistance

❑ Current limiting protection

❑ 4 logic control inputs

The Supertex HT0638 is an integrated electronic line switch

controllable from four logic-level inputs. These devices are

intended as a replacement for mechanical hook switches and

relays in telephones, answering machines, and similar telecom-

munications equipment.They switch the positive (Tip) side of the

telephone line using control inputs that are referenced to the

negative (Ring) side of the line. In the off state, it can hold-off 375

volts. In the on state, the series resistance is 15Ω maximum.

These devices provide adjustable current limiting via an external

sense resistor. Three of the control inputs are general purpose

and one is an override input that forces the switch to an off state

regardless of the state of the other inputs. This override input is

useful for ‘flash’ and pulse dialing purposes. Internal pull-up/

down resistors allow the inputs to be driven from single-ended

sources, push-pull sources, or left unconnected.

❑ Operates at 2V input

❑ 2µA maximum quiescent current at 100V

Applications

❑ Telephone handsets

❑ Fax machines

❑ Answering machines

❑ Auto-dial alarm systems

The HT0638 is powered from the phone line and are especially

useful in applications where external power is not available. Due

to their low quiescent current, both of these devices exceed the

on-hook resistance requirements of EIA-470-A.

Typical Application Circuit

For additional information, refer to application note

AN-H32.

08/23/02

Supertex Inc. does not recommend the use of its products in life support applications and will not knowingly sell its products for use in such applications unless it receives an adequate "products liability

indemnification insurance agreement." Supertex does not assume responsibility for use of devices described and limits its liability to the replacement of devices determined to be defective due to

workmanship. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the

Supertex website: http://www.supertex.com. For complete liability information on all Supertex products, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website.

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与HT0638LG-G相关器件

型号	品牌	获取价格	描述	数据表
HT0638LGP030	SUPERTEX	获取价格	Telecom Circuit, 1-Func, PDSO8, SOP-8
HT0638LGP031	SUPERTEX	获取价格	Telecom Circuit, 1-Func, PDSO8, SOP-8
HT0638ND	SUPERTEX	获取价格	Telecom Circuit, 1-Func
HT06400000J0G	AMPHENOL	获取价格	Barrier Strip Terminal Block
HT06403000J0G	AMPHENOL	获取价格	Barrier Strip Terminal Block
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HT06405000J0G	AMPHENOL	获取价格	Barrier Strip Terminal Block
HT06406000J0G	AMPHENOL	获取价格	Barrier Strip Terminal Block
HT06408000J0G	AMPHENOL	获取价格	Barrier Strip Terminal Block,
HT06409000J0G	AMPHENOL	获取价格	Barrier Strip Terminal Block

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