am79574 Advanced Micro Devices, am79574 Datasheet - Page 10

• Manufacturer Part Number: am79574
• Description: Subscriber Line Interface Circuit
• Manufacturer: Advanced Micro Devices

SWITCHING WAVEFORMS
Notes:
1. Unless otherwise noted, test conditions are BAT = –48 V, V
2. Overload level is defined when THD = 1%.
3. Balance return signal is the signal generated at V
4. Not tested in production. This parameter is guaranteed by characterization or correlation to other tests.
5. These tests are performed with a longitudinal impedance of 90
6. This parameter is tested at 1 kHz in production. Performance at other frequencies is guaranteed by characterization.
7. When the SLIC is in the anti-sat 2 operating region, this parameter is degraded. The exact degradation depends on system
8. Midpoint is defined as the connection point between two 300
9. Fundamental and harmonics from 256 kHz switch-regulator chopper are not included.
10. Calculate loop-current limit using the following equations:
10
Notes:
*
1. All delays measured at 1.4 V level.
In OHT state:
In Active state:
R
(Z
matches the impedance programmed by Z
12 kHz and 135
design. The anti-sat 2 region occurs at high loop resistances when V
E1 is internally connected to a logical 0.
DC1
T
) = 600 k resistive, receive input summing impedance (Z
= R
DC2
E0 to DET
DET*
DET
E1*
E1*
E1 to DET*
E0
= 20 k , C
I
I
for frequencies greater than 12 kHz. These tests are extremely sensitive to circuit board layout.
LIMIT
LIMIT
DC
tshdd
=
=
= 0.1 F, R
tgkde
0.5
0.8
V APPARENT
--------------------------------------
V
--------------------------------------
APPARENT
R
R FEED
FEED
d
= 51.1 k , no fuse resistors, two-wire AC output impedance, programming impedance
tshd0
T
.
tshde
Am79574 Data Sheet
TX
by V
RX
. This specification assumes that the two-wire AC load impedance
CC
RX
= +5 V, V
series resistors connected between A(TIP) and B(RING).
) = 300 k
and metallic impedance of 300
BAT
EE
= –5 V, R
resistive. (See Table 2 for component formulas.)
– V
tgkde
tgkdd
AX
– V
L
= 600 , C
BX
is less than 14 V.
tshde
tgkd0
HP
for frequencies below
= 0.22 F,