am79m574 ETC-unknow, am79m574 Datasheet - Page 8

• Manufacturer Part Number: am79m574
• Description: Metering Subscriber Line Interface Circuit
• Manufacturer: ETC-unknow

ELECTRICAL CHARACTERISTICS (continued)
8
Power Dissipation BAT = –48 V, Normal Polarity
On-hook Open Circuit state
On-hook OHT state
On-hook Active state
Off-hook OHT state
Off-hook Active state
Supply Currents
V
V
V
Power Supply Rejection Ratio (V
V
V
V
Off-Hook Detector
Current threshold accuracy
Ground-Key Detector Thresholds, Active State, BAT = –48 V (See Test Circuit F)
Ground-key resistance threshold B(RING) to GND
Ground-key current threshold
Ring-Trip Detector Input
Bias current
Offset voltage
CC
EE
BAT
CC
EE
BAT
On-hook supply current
On-hook supply current
On-hook supply current
Description
R
R
Open Circuit state
OHT state
Active state
Open Circuit state
OHT state
Active state
Open Circuit state
OHT state
Active state
50 Hz to 3400 Hz
3.4 kHz to 50 kHz
50 Hz to 3400 Hz
3.4 kHz to 50 kHz
50 Hz to 3400 Hz
3.4 kHz to 50 kHz
I
B(RING) to GND
Midpoint to GND
Source resistance 0 to 2 MΩ
RIPPLE
DET
L
L
= 600 Ω
= 600 Ω
= 365/R
Test Conditions (See Note 1)
= 50 mVrms)
D
Nominal
Am79M574 Data Sheet
–1*
–1*
–1*
–1*
–1*
–1*
–1*
–1*
–1*
Min
–20
–50
2.0
25
30
22
25
20
25
10
10
27
30
20
25
–5
–0.05
Typ
135
135
200
200
500
650
3.0
6.0
7.5
1.0
2.2
2.7
0.4
3.0
4.0
5.0
35
35
45
45
35
35
40
40
25
25
45
45
40
40
9
9
0
1000
Max
10.0
12.0
10.0
120
250
200
400
300
750
+20
+50
4.5
2.3
3.5
6.0
1.0
5.0
6.0
80
Unit
mW
mA
mA
mV
dB
kΩ
µA
%
Note
6, 7
6, 7
6, 7
13
8