ATTL7557AAU 查看數據表（PDF） - Agere -> LSI Corporation

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ATTL7557AAU

Low-Power SLICs with Battery Switch

Agere -> LSI Corporation 

Data Sheet

January 2000

L7556, L7557 Low-Power SLICs

with Battery Switch

Recommended Operating Conditions

Parameter

Min

Ambient Temperature

–40

VCC Supply Voltage

4.75

VBAT1 Supply Voltage

–24

VBAT2 Supply Voltage

–16

Loop Closure Threshold-detection Programming Range

—

dc Loop Current-limit Programming Range

5

On- and Off-hook 2-wire Signal Level

—

ac Termination Impedance Programming Range

150

Typ

Max

Unit

—

85

°C

5.0

5.25

V

–48

–60

V

–28

VBAT1

V

10

ILIM

mA

22

45

mA

1

2.2

Vrms

600

1300

Ω

Electrical Characteristics

Minimum and maximum values are testing requirements. Typical values are characteristic of the device and are

the result of engineering evaluations. Typical values are for information purposes only and are not part of the test-

ing requirements. Minimum and maximum values apply across the entire temperature range (–40 °C to +85 °C)

and the entire battery range unless otherwise specified. Typical is defined as 25 °C, VCC = 5.0 V, VBAT1 = –48 V,

VBAT2 = –48 V, and ILIM= 40 mA. Positive currents flow into the device. Test circuit is Figure 4 unless noted.

Table 4. Power Supply

Parameter

Min

Power Supply—Powerup, No Loop Current:

ICC

—

IBAT (VBAT = –48 V)

—

Power Dissipation (VBAT = –48 V)

—

Power Supply Rejection 500 Hz to 3 kHz (See Figures 5, 6, 15, and 16.)1:

VCC

35

VBAT

45

Thermal Protection Shutdown (Tjc)

—

Thermal Resistance, Junction to Ambient (θJA)

—

1. This parameter is not tested in production. It is guaranteed by design and device characterization.

Typ

2.8

–2.3

125

—

—

175

60

Max

Unit

—

mA

—

mA

155

mW

—

dB

—

dB

—

°C

—

°C/W

Lucent Technologies Inc.

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