le79r70 Zarlink Semiconductor, le79r70 Datasheet - Page 8

• Manufacturer Part Number: le79r70
• Description: Ringing Subscriber Line Interface Circuit
• Manufacturer: Zarlink Semiconductor

ELECTRICAL CHARACTERISTICS
Transmission Performance
2-wire return loss
Z
V
Z
Overload level, 2-wire and 4-wire, off hook Active state
Overload level, 2-wire
THD (Total Harmonic Distortion)
THD, on hook, OHT state
Longitudinal Performance (See Test Circuit C)
Longitudinal to metallic L-T, L-4 balance
Longitudinal signal generation 4-L
Longitudinal current per pin (A or B)
Longitudinal impedance at A or B
Idle Channel Noise
C-message weighted noise
Psophometric weighted noise
Insertion Loss and Four- to Four-Wire Balance Return Signal (See Test Circuits A and B)
Gain accuracy
Gain accuracy
Gain accuracy
Gain accuracy
Gain accuracy over frequency
Gain tracking
Gain tracking
OHT state, on hook
Group delay
VTX
RSN
VTX
, analog output impedance
, analog output offset voltage
, analog input impedance
Description
4- to 2-wire
2- to 4-wire and
4- to 4-wire
4- to 2-wire
2- to 4-wire and
4- to 4-wire
200 Hz to 3.4 kHz (Test Circuit D)
On hook, R
+3 dBm, BAT2 = –24 V
0 dBm, R
BAT1 = –67 V
200 Hz to 3.4 kHz
200 Hz to 800 Hz, Normal polarity
Active or OHT state
0 to 100 Hz, T
0 dBm, 1 kHz
0 dBm, 1 kHz
OHT state, on hook
OHT state, on hook
300 to 3400 Hz
relative to 1 kHz
+3 dBm to –55 dBm
relative to 0 dBm
0 dBm to –37 dBm
+3 dBm to 0 dBm
0 dBm, 1 kHz
Test Conditions (See Note 1)
Zarlink Semiconductor Inc.
LAC
LAC
= 600 Ω,
A
= 600 Ω
= +25°C
8
–0.20
–6.22
–0.35
–6.37
–0.10
–0.10
–0.10
–0.35
Min
0.88
–50
2.5
26
40
40
12
–6.02
–6.02
Typ
–64
–83
28
25
+7
3
1
0
0
3
Max
+0.20
–5.82
+0.35
–5.77
+0.10
+0.10
+0.10
+0.35
+50
+14
–50
–40
–76
20
20
mArms
dBrnC
Unit
dBmp
Ω/pin
Vrms
Vpk
mV
dB
dB
dB
dB
µs
Ω
Ω
Note
1, 4, 6
1, 4, 6
3, 4
3, 4
2a
2b
4
4
5
4
4
3
3