8

Am79M535 Data Sheet

Power Dissipation Battery = –48 V, Normal Polarity

On-hook Open Circuit state

–1*

35

35

120

80

mW

On-hook OHT state

–1*

135

135

250

200

On-hook Active state

–1*

200

200

400

300

Off-hook OHT state

500

750

Off-hook Active state

650

1000

Supply Currents

Open Circuit state

OHT state

Active state

3.0

6.0

7.5

4.5

10.0

12.0

mA

Open Circuit state

OHT state

Active state

1.0

2.2

2.7

2.3

3.5

6.0

Open Circuit state

OHT state

Active state

0.4

3.0

4.0

1.0

5.0

6.0

50 Hz to 3400 Hz

–1*

25

30

45

45

dB

6, 7

3.4 kHz to 50 kHz

–1*

22

25

35

35

50 Hz to 3400 Hz

–1*

20

25

40

40

3.4 kHz to 50 kHz

–1*

10

10

25

25

50 Hz to 3400 Hz

–1

27

30

45

45

3.4 kHz to 50 kHz

–1*

20

25

40

40

Off-Hook Detector

Current threshold accuracy

–20

+20

%

Ground-Key Detector Thresholds, Active state, Battery = –48 V (See Test Circuit F)

Ground-key resistance threshold

B(RING) to GND

2.0

5.0

10.0

k

Ω

Ground-key current threshold

B(RING) to GND

9

mA

8

Midpoint to GND

9

Ring-Trip Detector Input

Bias current

–5

–0.05

Offset voltage

Source resistance 0 to 2 M

Ω

–50

0

+50

mV

12

Logic Inputs (C4–C1, E0, E1, and CHCLK)

Input High voltage

2.0

V

Input Low voltage

0.80

Input High current

All inputs except E1

–75

40

Input High current

Input E1

–75

45

Input Low current

–0.40

mA

ELECTRICAL CHARACTERISTICS (continued)

Description

Test Conditions (See Note 1)

Min

Typ

Max

Unit

Note