59

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

FIGURE 10. IDLE CHANNEL NOISE

FIGURE 11. GROUND KEY DETECT

RING TRIP DETECTOR (DT, DR)

Offset Voltage

Source Res = 0

-20

-

20

mV

Input Bias Current

Source Res = 0

-500

-

500

nA

Input Common-Mode Range

Source Res = 0

-

0

V

Input Resistance

Source Res = 0, Balanced

3

-

-

M

Ω

RING RELAY DRIVER

-

1.0

1.5

V

Off-State Leakage Current

-

-

10

µA

DIGITAL INPUTS (E0, E1, C1, C2)

0

-

0.8

V

2-

V

-200

-

-

µA

-100

-

-

µA

Input High Current

-

-

40

µA

DETECTOR OUTPUT (DET)

-

-

0.45

V

2.7

-

-

V

Electrical Specifications

41.2k

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

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

600k

Ω

300k

Ω

600

Ω

TIP

27

19

RING

28

RSN

16

TIP

27

RSN

16

RING

28

14

41.2k

Ω

41.2k

Ω

1.5

µF

DET

E1 = C1 = 0, C2 = 1

HC5513