BATTERY FEED CHARACTERISTICS

Constant Loop Current Tolerance

18mA

 IL  45mA,

Forward

Only

•

Forward

Only

•••

Forward and Reverse

(Note 27, Figure 10)

mA

Tip Open State TIPX Leakage

Current

S = Closed (Figure 11)

-

-

-200

A

••••••

Tip Open State RINGX Current

22.6

26.8

31

mA

••••••

15.5

17.1

18.2

mA

Tip Open State RINGX Voltage

-

42.8

-

V

••••••

Tip Voltage (Ground Start)

(Figure 11)

-5.3

-4.8

-4.3

V

NA

NA

NA

••

NA

Tip Voltage (Ground Start)

Active State, (S Closed) Tip Lead to

••

-48V Through 7k

, Ring Lead to

Ground Through 150

(Figure 11)

-5.3

-4.8

-4.3

V

NA

NA

NA

NA

Open Circuit State Loop Current

-20

0

20

A

••••••

LOOP CURRENT DETECTOR

Programmable Threshold

mA

Forward

Only

•

Forward

Only

•••

Forward and Reverse

GROUND KEY DETECTOR

Ground Key Detector Threshold

Tip/Ring Current Difference

Tip Open

5

8

11

mA

••

NA

••

NA

Active (Note 29, R1 = 2.5k

, Figure 12) 12.5

20

27.5

mA

LINE VOLTAGE MEASUREMENT

Pulse Width (GKD_LVM)

0.32

0.36

0.4

ms/V

NA

NA

NA

•••

RING TRIP DETECTOR (DT, DR)

Ring Trip Comparator Current

Source Res = 2M



-2-

A

••••••

Input Common-Mode Range

Source Res = 2M



--

200

V

••••••

Electrical Specifications

applies to the part. (NA) symbol used to indicate the test does not apply to the part. (Continued)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

HC55120

HC55121

HC55130/1 HC55140/1 HC55142/3 HC55150/1