6

FIGURE 8. CURRENT GAIN-RSN TO METALLIC

FIGURE 9. FREQUENCY RESPONSE, INSERTION LOSS,

GAIN TRACKING AND HARMONIC DISTORTION

NOISE

Idle Channel Noise at 2-Wire

C-Message Weighting (Note 23, Figure 10)

-

8.5

-

dBrnC

Psophometrical Weighting

(Note 23, Figure 10)

-

-81.5

-

dBrnp

Idle Channel Noise at 4-Wire

C-Message Weighting (Note 24, Figure 10)

-

8.5

-

dBrnC

Psophometrical Weighting

(Note 23, Figure 10)

-

-81.5

-

dBrnp

HARMONIC DISTORTION

2-Wire to 4-Wire

0dBm, 1kHz (Note 25, Figure 7)

-

-65

-54

dB

4-Wire to 2-Wire

0dBm, 0.3kHz to 3.4kHz (Note 26, Figure 9)

-

-65

-54

dB

BATTERY FEED CHARACTERISTICS

Constant Loop Current Tolerance

mA

Loop Current Tolerance (Standby)

mA

14

16.67

20

V

LOOP CURRENT DETECTOR

On-Hook to Off-Hook

mA

Off-Hook to On-Hook

mA

Loop Current Hysteresis

mA

GROUND KEY DETECTOR

Tip/Ring Current Difference - Trigger

(Note 29, Figure 11)

8

12

17

mA

Tip/Ring Current Difference - Reset

(Note 29, Figure 11)

3

7

12

mA

Hysteresis

(Note 29, Figure 11)

0

5

9

mA

Electrical Specifications

number references in the figures refer to the 28 lead PLCC package. (Continued)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

41.2k

Ω

41.2k

Ω

1.5

µF

600

Ω

TIP

27

RING

28

14

RSN

16

300k

Ω

600k

Ω

300k

Ω

C

1/

600

Ω

TIP

27

19

RING

28

RSN

16

HC5523