10

Agere Communications Inc.

Data Sheet

September 2001

L7585F Full-Feature, Low-Power SLIC and Switch

Electrical Characteristics

In general, minimum and maximum values are testing requirements. However, some parameters may not be

tested in production because they are guaranteed by design and device characterization. Typical values reflect the

design center or nominal value of the parameter; they are for information only and are not a requirement. Minimum

and maximum values apply across the entire temperature range (–40 °C to +85 °C) and entire battery range

* Not to exceed 26 grams of water per kilogram of dry air.

† This parameter is not tested in production; it is guaranteed by design and device characterization.

1. The ringing source may be either of the following:

a). The ringing source consists of the ac and dc voltages added together (battery-backed ringing); the ringing return is ground. In this case,

bit B3 will always be a 1 when ringing is applied.

b). The ringing source consists of only the ac voltage (earth-backed ringing); the ringing return is the dc voltage. In this case, bit B3 will

always be a 0 when ringing is applied.

2. NDET must also indicate ring trip when the ac ringing voltage is absent (<5 Vrms) from the ringing source.

3. Pretrip ringing must not be tripped by a 10 k

Ω resistor in parallel with an 8 µF capacitor applied across tip and ring.

Table 4. Operating Conditions and Powering

Parameter

Min

Typ

Max

Unit

Temperature Range

–40

—

85

°C

Humidity Range

5

—

95*

%RH

Supply Voltages:

4.75

4.75

8.0

–35

—

—

5.0

5.0

10

–48

—

—

5.5

5.5

12.0

–60

±0.5

±0.25

V

V

V

V

V

V

Supply Currents (all states, no loop current):

—

—

—

4.9

45

–3.1

7.0

200

–4.0

mA

µA

mA

Total Power Dissipation (all states, no loop current)

—175

200

mW

30

45

45

45

40

—

—

—

—

—

—

—

dB

dB

dB

dB

Thermal Resistance (still air)

—

—

—

—

47

155

°C/W

°C

Table 5. Ring Trip Detector

Parameter

Min

Typ

Max

Unit

Voltage at input that will cause ring trip after appropriate zero crossings.

±2.5

±3

±3.5

V

Voltage at input that will cause immediate ring trip.

±12

±15

±18

V

Frequency (f)

dc Voltage

ac Voltage

19

–39.5

60

20

—

—

28

–57

105

Hz

V

Vrms

Loop Resistance

Trip Time

NDET Valid

2000

—

—

—

—

—

—

200

80

Ω

ms

ms