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參數資料
| 型號： | L8576B |
| 英文描述： | Dual Ringing SLIC |
| 中文描述： | 雙振鈴用戶接口 |
| 文件頁數： | 13/26頁 |
| 文件大?。?/td> | 583K |
| 代理商： | L8576B |
Agere Systems Inc.
13
Data Sheet
May 2001
L8576B Dual Ringing SLIC
Electrical Characteristics
(continued)
Table 7. ac Feed Characteristics
(continued)
1. Requires external components connected as shown in Figure 2. Transmission characteristics are specified assuming a 600
resistive ter-
mination and
±
1% external resistors.
2. This parameter is not tested in production. It is guaranteed by design and device characterization.
3. Return loss and transhybrid loss are functions of device gain accuracies and the external hybrid circuit. Guaranteed performance assumes
1% tolerance components.
Table 8. Isolation Between Channels
1. These parameters are not tested in production. They are guaranteed by design and device characterization.
Table 9. Data Interface and Logic
1. All logic voltages are referenced to AGND.
Parameter
1
Min
Typ
Max
Unit
Gain vs. Level (transmit and receive; 0 dBV reference)
2
:
–50 dB to +3 dB
Return Loss
3
:
200 Hz—500 Hz
500 Hz—3400 Hz
Transhybrid Loss
3
:
200 Hz—500 Hz
500 Hz—2500 Hz
2500 Hz—3400 Hz
Idle-channel Noise (Tip/Ring):
Psophometric
2
C-message
3 kHz Flat
2
Idle-channel Noise (XMT):
Psophometric
2
C-message
3 kHz Flat
2
–0.05
0
0.05
dB
20
26
24
29
—
—
dB
dB
20
26
26
24
29
29
—
—
—
dB
dB
dB
—
—
—
—
—
—
–77
12
20
dBmp
dBrnC
dBrn
—
—
—
—
—
—
–77
12
20
dBmp0
dBrnC0
dBrn0
Parameter
1
Min
—
Typ
–90
Max
–80
Unit
dB
Interchannel Small-signal Crosstalk. (Both channels in forward or reverse
battery state.) (2-wire to 2-wire, 2-wire to 4-wire, 4-wire to 4-wire.)
Impulse Noise. (One channel ringing, other channel in forward or reverse
battery state.)
—
40
47
dBrnC0
Parameter
1
Symbol
V
IH
V
IL
I
IH
I
IL
Min
2
0
–40
–75
Typ
—
—
—
—
Max
V
CC
0.7
–100
–200
Unit
V
V
μ
A
μ
A
High-level Input Voltage (B2, RNGNG, and NDISC)
Low-level Input Voltage (B2, RNGNG, and NDISC)
Input Bias Current (high) (B2, RNGNG, and NDISC)
Input Bias Current (low) (B2, RNGNG, and NDISC)
High-level Output Voltage (NSTAT, open collector with inter-
nal pull-up resistor):
(I
OUT
= –20
μ
A)
(I
OUT
= –1
μ
A)
Low-level Output Voltage (NSTAT, open collector with internal
pull-up resistor) (I
OUT
= 200
μ
A)
V
OH
V
OH
V
OL
2.4
—
0
4.3
5.0
0.2
V
CC
—
0.4
V
V
V
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