ATTL7582BC データシートの表示（PDF） - Agere -> LSI Corporation

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ATTL7582BC

Tip Ring Access Switch

Agere -> LSI Corporation 

Data Sheet

November 1999

L7582 Tip Ring Access Switch

Electrical Characteristics (continued)

Table 9. Additional Electrical Characteristics

Parameter

Digital Input Characteristics:

Input Low Voltage

Input High Voltage

Input Leakage Current (high)

Input Leakage Current (low)

Power Requirements:

Power Dissipation

VDD Current

VBAT Current

Temperature Shutdown Requirements*:

Shutdown Activation Temperature

Shutdown Circuit Hysteresis

Test Condition

Measure Min Typ Max Unit

—

—

VDD = 5.5 V, VBAT = –75 V,

Vlogicin = 5 V

VDD = 5.5 V, VBAT = –75 V,

Vlogicin = 0 V

—

— — 1.5 V

—

3.5 — — V

llogicin — — 1 µA

llogicin — — 1 µA

VDD = 5 V, VBAT = –48 V,

idle/talk state or all OFF state,

ringing state or access state

VDD = 5 V,

idle/talk state or all OFF state,

ringing state or access state

VBAT = –48 V,

idle/talk state or all OFF state,

ringing state or access state

IDD, IBAT

IDD

IDD

IDD

IBAT

IBAT

— 3 5 mW

— 6 10 mW

— 560 900 µA

— 0.750 1.9 mA

— 4 10 µA

— 4 10 µA

—

—

110 125 150 °C

—

—

10 — 25 °C

* Temperature shutdown flag (TSD) will be high during normal operation and low during temperature shutdown state.

Zero Cross Current Turn Off

The ring access switch (SW4) is designed to turn off on

the next zero current crossing after application of the

appropriate logic input control. This switch requires a

current zero cross to turn off. Switch 4, once on, will

remain in the ON state (regardless of logic input) until a

current zero cross. Therefore, to ensure proper opera-

tion of switch 4, this switch should be connected, via

proper impedance, to the ringing generator or some

other ac source. Do not attempt to switch pure dc with

switch 4.

For a detailed explanation of the operation of switch 4,

please refer to the An Introduction to L758X Series of

Line Card Access Switches Application Note.

Switching Behavior

When switching from the power ringing state to the

idle/talk state via simple logic level input control, the

L7582 is able to provide control with respect to the tim-

ing when the ringing access contacts are released rela-

tive to the state of the line break contacts.

Make-before-break operation occurs when the line

break switch contacts are closed (or made) before the

ringing access switch contact is opened (or broken).

Break-before-make operation occurs when the ringing

access contact is opened (broken) before the line

break switch contacts are closed (made).

Using the logic level input pins INring and INaccess,

either make-before-break or break-before-make opera-

tion of the L7582 is easily achieved. The logic

sequences for either mode of operation are given in

Table 10 and Table 11. See the Truth Table (Table 13)

for an explanation of the logic states.

Lucent Technologies Inc.

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