HC55121IBZ datasheet(10/36 Pages) RENESAS

10 / 36 page

BATTERY FEED CHARACTERISTICS

Constant Loop Current Tolerance

18mA

 IL  45mA,

Forward

Only

•

Forward

Only

•••

IL = 26.5mA, RLIM = 38.3k

Forward and Reverse

(Note 27, Figure 10)

0.92IL

1.08IL

Tip Open State TIPX Leakage

Current

S = Closed (Figure 11)

-200

A

••••••

Tip Open State RINGX Current

R1 = 0, VBH = -48V, RLIM = 38.3k

22.6

26.8

••••••

R1 = 2.5k, VBH = -48V (Figure 11)

15.5

17.1

18.2

Tip Open State RINGX Voltage

5mA < IR1 < 26mA (Figure 11)

42.8

••••••

Tip Voltage (Ground Start)

Active State, (S Open) R1 = 150

(Figure 11)

-5.3

-4.8

-4.3

••

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

Open Circuit State Loop Current

(Active) RL = 0

-20

A

••••••

LOOP CURRENT DETECTOR

Programmable Threshold

ILTh = (500/ RD)  5mA,

0.9ILTh

ILTh

1.1ILTh

Forward

Only

•

Forward

Only

•••

Forward and Reverse

ILTh = 8.5mA

RD = 58.8k

GROUND KEY DETECTOR

Ground Key Detector Threshold

Tip/Ring Current Difference

Tip Open

••

Active (Note 29, R1 = 2.5k

, Figure 12) 12.5

27.5

LINE VOLTAGE MEASUREMENT

Pulse Width (GKD_LVM)

Pulse Width = (20)(CREV.../ILIM)

0.32

0.36

0.4

ms/V

•••

RING TRIP DETECTOR (DT, DR)

Ring Trip Comparator Current

Source Res = 2M



-2-

A

••••••

Input Common-Mode Range

Source Res = 2M



200

••••••

Electrical Specifications

TA = -40°C to 85°C, VCC = +5V 5%, VBH = -48V, VBL = -24V, PTG = Open, RP1 = RP2 = 0ZT = 120k, RLIM = 38.3k, RD = 50k, RDC_RAC = 20k,

ROH = 40k, CH = 0.1F, CDC = 4.7F, CRT/REV = 0.47F, GND = 0V, RL = 600. Unless Otherwise Specified.

(•) Symbol used to indicate the test

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

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