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參數(shù)資料
| 型號(hào)： | U3900BM |
| 英文描述： | Programmable Telephone Audio Processor |
| 中文描述： | 程控電話音頻處理器 |
| 文件頁(yè)數(shù)： | 24/34頁(yè) |
| 文件大?。?/td> | 762K |
| 代理商： | U3900BM |
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U3900BM
Rev. A2, 25-Aug-98
Target Specification
30 (34)
Electrical Characteristics (continued)
Parameters
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
Fig.
Switching matrix,
VL = 0, VB = 5 V, ENCT =ENAM = I4O4 = I5O4 = 1, VAMPB = VCMIC = 1 Vrms
Input impedance
AMPB, CMIC
50
60
70
k
Gain CMIC
→ CEAR,
AMREC
→ CEAR
–0.4
0
0.4
dB
Max. input level
AMPB, CMIC
600
mV
Max. output level
CEAR
VB–
600 mV
VPP
Offset
I4O4: 1
→ 0
DVAMREC
±30
mV
Mute switching matrix
I4O4 = 0
60
dB
Power-on reset
VL = 0, VMP = 3.3 V, VB = 5 V, U3900BM in power-down mode
Power-on reset by VMP
threshold, VL or
VRING or ES high
VB = 4 V, ES = 4 V,
rise VMP
VMPon
2.65
2.75
2.85
V
Power-on reset by VB
threshold, VL or VRING
or ES high
VMP = 3 V, ES = 3 V,
rise VB
VBon
2.85
2.95
3.05
V
Low voltage interrupt
VL = 0, VMP = 3.3 V, VB = 0 V
VMP decreasing
Decrease VMP until INT
returns to high
VLVI
2.5
2.6
2.7
V
Power-off reset
VL = 0, VMP = 3.3 V, VB = 0 V
Low voltage reset
Decrease VMP until RESET
returns to low
VLVR
2.35
2.45
2.55
V
Difference voltage
between low voltage
interrupt and reset
VLVI – VLVR
100
150
mV
Logical part
VMP = 3.3 V, VB = 5 V
Output impedance at
OSCOUT
0.5
1.0
k
Pins BCL,
BDA (input mode)
Input leakage current
Low level
High level
0 < Vi < VMP
0.8
VMP
–1
0.2
VMP
1
V
mA
Pins INT,
BDA (output mode)
Output low
(resistance to GND)
220
310
400
AFS acoustic feedback suppression, IL = 14 mA, VGEN = 300 mV,
ERX = ETX = ENMIC = ENSTBAL = I1O1 = I3O3 = 1, SL[0:1] = 0, LF[0:3] = 1, P[0:4] = 31,
AGARX[0:2] = 0
Adjustment range of
attenuation
IL ≥ 15 mA
0
50
dB
gain
IL ≥ 15 mA, IINLDT = 0
mA
IINLDR = 10
mA
DGT
48
50
52
dB
Attenuation of speaker
amplifier
IL ≥ 15 mA, IINLDT = 10
mA
IINLDR = 0
mA
GSA
48
50
52
dB
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