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Preliminary Information

MH89625C

† Loop Electrical Characteristics are over Recommended Operating Conditions unless otherwise stated.

‡ Typical figures are at 25

°C with nominal ±5V supplies and are for design aid only.

x The SLIC can be loaded with an AC impedance as low as 4000

Ω without generating a false SHK output. Since each REN

represents 8k

Ω, the SLIC can drive a REN of 2 without generating a false SHK output.

y This parameter is over Recommended Operating Conditions as well as the specified Operating Loop Resistance.

z Off-Hook Detect (SHK) will be detected for loop lengths of 2900

Ω or less.

† AC Electrical Characteristics are over Recommended Operating Conditions unless otherwise stated.

‡ Typical figures are at 25

°C and are for design aid only.

Note 1: All of the above test conditions use 200Hz to 3400 Hz unless otherwise stated.

Note 2: The transmit codec gain is set to 0dB, the receive codec gain is set to 0dB, and the receive gain adjustment is set to 0dB

(GS=5V), unless otherwise specified.

Note 3: With the transmit and receive gains set to 0dB; 0dBmO at the DSTi input will appear as 0dBm at the Tip-Ring output; 0dBm at

the Tip-Ring input will appear as 0dBmO at the DSTo output.

Note 4 All dBm is referenced to 600

Ω.

Characteristics

Sym

Min

Max

Units

Test Conditions

1

Maximum AC Ringing x

Current Rejection

33

mA

2

Ring Trip Detect Time y

100

ms

3

Hook Switch Detect Time:

Off-Hook to On-Hook

On-Hook to Off-Hook

20

20

ms

ms

4

Operating Loop Currents

Maximum Operating Loop Current

18

22

50

26

1850

mA

LCA= Open

5

Operating Loop Resistance

0

0

2300

Ω

Ω

6

Loop Current at Off-Hook z

Detect Threshold

710

13

mA

Characteristics

Sym

Min

Max

Units

Test Conditions

1

2-wire Input Impedance x

600R

(Magnitude)

560 Network

(Magnitude)

680 Network

600

720

813

Ω

Ω

Ω

1020 Hz

2

Return Loss at 2-Wire y

14

18

14

23

24

35

dB

dB

dB

300 Hz

500-2000 Hz

3400 Hz

3

Longitudinal to Metallic

Balance

40

46

54

51

dB

dB

300-600 Hz

600-3400 Hz

4

Transhybrid Loss 

16

20

16

52

41

52

dB

dB

dB

300 Hz

500-2500 Hz

3400 Hz

5

Power Supply Rejection Ratio

at 2-Wire and DSTo:

PSRR

20

20

20

40

30

40

dB

dB

dB

Ripple 50mV

1020 Hz