am79231 ETC-unknow, am79231 Datasheet - Page 18

• Manufacturer Part Number: am79231
• Description: Intelligent Subscriber Line Interface Circuit Islic
• Manufacturer: ETC-unknow

Am79231 Current-Limit Behavior
Am79231 Fault Indications
18
Notes:
1. Unless otherwise specified, test conditions are: VCC = 5 V, RMG1 = RMG2 = 1 kΩ, BATH = –65 V,
2. These tests are performed with the following load impedances:
3. Not tested or partially tested in production. This parameter is guaranteed by characterization or correlation
4. This parameter is tested at 1 kHz in production. Performance at other frequencies is guaranteed by
5. When the Am79231 and ISLAC device is in the anti-sat operating region, this parameter is degraded. The
6. –55 dBm gain tracking level not tested in production. This parameter is guaranteed by characterization and
7. This spec is valid from 0 V to VBL or –50 V, whichever is lower in magnitude.
Disconnect
Tip Open
Standby
No Fault
Thermal Shutdown
SLIC Mode
BATL = 36 V, VBL = 34, RRX = 150 kΩ, RL = 600 Ω, RSA = RSB = 200 kΩ, RFA = RFB = 50 Ω,
CHP = 22 nF, CAD = CBD = 22 nF, IRSN = 84 µA. DC-feed conditions are normally set by the ISLAC
device. When the Am79231 is tested by itself, its operating conditions must be simulated as if it were
connected to an ideal ISLAC device.
Frequency < 12 kHz – Longitudinal impedance = 500 Ω; metallic impedance = 300 Ω
Frequency > 12 kHz – Longitudinal impedance = 90 Ω; metallic impedance = 135 Ω
to other tests.
characterization.
exact degradation depends on system design.
correlation to other tests.
Fault
Applied fault between ground and T/R
VBH applied to Tip or Ring
Ring Short to GND
Short Tip-to-VBH
Short Ring-to-GND
RT Network
Condition
Am79231 Data Sheet
IMT operates normally (Vref ±1V)
IMT above 2.8 V; ILG operates normally
30 K


VREF
Indication
30 K
390 pf


Min
32
24
26
VBH/200 kΩ
Typ
34
38
35
1
Max
100
37
47
44
Unit
Unit
mA
µA
A
Note
Note
7