ATTL7554BP Agere Systems, ATTL7554BP Datasheet - Page 8

• Manufacturer Part Number: ATTL7554BP
• Description: L7554 Low-Power SLIC
• Manufacturer: Agere Systems

L7554 Low-Power SLIC
Electrical Characteristics
Table 5. 2-Wire Port
1. The longitudinal current is independent of dc loop current.
2. Current-limit I
3. IEEE is a registered trademark of The Institute of Electrical and Electronics Engineers, Inc.
4. Longitudinal balance of circuit card will depend on loop series resistance matching (see Figures 23 and 24).
5. This parameter is not tested in production. It is guaranteed by design and device characterization.
8
Tip or Ring Drive Current
Signal Current
Longitudinal Current Capability per Wire
dc Loop Current Limit
Powerup Open Loop Voltage Levels
Ground Start State
dc Feed Resistance (for I
Loop Resistance Range (–3.17 dBm overload into
Longitudinal to Metallic Balance— IEEE
Metallic to Longitudinal Balance
RFI Rejection (See Figure 8.)
Disconnect State
= dc + Longitudinal + Signal Currents
R
Programmability Range
Accuracy (20 mA < I
Common-mode Voltage
Differential Voltage:
V
V
PT Resistance (V
PR Resistance (V
PT Resistance
I
I
(See Figure 7.)
50 Hz to 1 kHz
1 kHz to 3 kHz
200 Hz to 4 kHz
0.5 Vrms, 50
500 kHz to 100 MHz
begins (see Figure 25). Select R
LOOP
LOOP
600 ; not including protection)
BAT
BAT
LOOP
= –48 V, Temperature = 25 C
= –72 V, Temperature = 85 C (L7554BP)
= 20 mA at V
= 20 mA at V
= 100
LIM
is programmed by a resistor, R
4
Source, 30% AM Mod. 1 kHz
BAT
BAT
BAT
BAT
2
LIM
< V
Parameter
< V
= –24 V
= –48 V
LOOP
< 40 mA)
PT
PR
PROG
< 0 V)
< 0 V)
5
below regulation level)
(k ) = 1.67 x I
(continued)
PROG
3
1
Std. 455
, from pin I
LIM
(mA).
PROG
to DCOUT. I
|V
|V
BAT
BAT
1900
Min
100
100
100
700
8.5
65
15
90
64
60
46
—
—
—
—
5
+ 10.0|
+ 7.0|
LIM
is specified at the loop resistance where current limiting
|V
|V
BAT
BAT
V
Typ
143
133
143
113
–55
BAT
I
15
75
70
—
—
—
—
—
—
—
LIM
+ 6.5|
+ 6.8|
/2
|V
Lucent Technologies Inc.
BAT
Max
133
–45
45
—
—
—
—
—
—
—
—
—
—
—
—
—
—
12
+ 6.0|
March 1997
Data Sheet
mArms
mArms
Unit
dBV
mA
mA
mA
k
k
k
dB
dB
dB
%
V
V
V