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UPD9903 Datasheet(PDF) 17 Page - NEC

Part # UPD9903
Description  UPD9903 ANALOG SUBSCRIBER LINE LSI DIGITAL CODEC
PDF  28 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD9903 Datasheet(HTML) 17 Page - NEC

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µPD9903
17
3.2
Combined Specifications with the
µPC7073
DC characteristics
µPC7073 (VBB = –42 to –58 V, VCC = 5 V
± 0.25 V, TA = 0 to 70 ˚C, 18 ≤ IL ≤ ILMAX (mA))
µPD9903 (TA = 0 to 70 ˚C, VDD = 5 V
± 0.25 V, VDG = VAG = 0 V, fDCLK = 2048 kHz)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Units
DC feed resistance
RBF
200
Ω feed
180
200
220
Ω
400
Ω feed
360
400
440
Minimum loop current
ILMIN
VBB = –51 V
200
Ω feed
21.7
22.2
22.6
mA
RL = 1900
Ω
400
Ω feed
18.2
18.8
19.3
Maximum current setting
ILMAX
ILMAX = 76 mA setting
200
Ω feed
70
76
82
mA
value
400
Ω feed
50
55
60
ILMAX = 45 mA setting
40
45
50
ILMAX = 35 mA setting
31
35
39
Pin voltage during on-hook
VTS
Normal on-hook,
2.25
2.55
2.85
V
between Tip and GND, VBB = –48 V
VRS
Normal on-hook,
3.05
3.35
3.65
between Ring and VBB, VBB = –48 V
VTS
On-hook transmission,
2.25
2.55
2.85
between Tip and GND, VBB = –48 V
VRS
On-hook transmission,
3.05
3.35
3.65
between Ring and VBB, VBB = –48 V
Voltage between lines
VTS
VBB = –48 V
VBB – 7.0 VBB – 5.9 VBB – 5.0
V
during on-hook
Supervisory control
VBBF
32
35
38
V
– VBB abnormal voltage



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