3. Bill of Materials: Si2494/39 Chipset Component Value Supplier(s) C1, C2 33 pF," />
參數(shù)資料
型號： SI2494-A-GM
廠商： Silicon Laboratories Inc
文件頁數(shù)： 5/70頁
文件大?。?/td> 0K
描述： IC ISOMODEM 56KBPS 38-QFN
標準包裝： 364
系列： *
Si2494/39
Rev. 1.0
13
3. Bill of Materials: Si2494/39 Chipset
Component
Value
Supplier(s)
C1, C2
33 pF, Y2, X7R, ±20%
Panasonic, Murata, Vishay
C3
10 nF, 250 V, X7R, ±20%
Venkel, SMEC
C4
1.0 F, 50 V, Elec/Tant, ±20%
Panasonic
C5, C6, C50, C52
0.1 F, 16 V, X7R, ±20%
Venkel, SMEC
C7
2.7 nF, 50 V, X7R, ±20%
Venkel, SMEC
C8, C9
680 pF, Y2, X7R, ±10%
Panasonic, Murata, Vishay
C10
0.01 F, 16 V, X7R, ±20%
Venkel, SMEC
C40
C41
32.768 kHz: 18 pF, 16 V, NPO, ±5%
Venkel, SMEC
4.9152 MHz: 33 pF, 16 V, NPO, ±5%
27 MHz: Not Populated
C51
0.22 F, 16 V, X7R, ±20%
Venkel, SMEC
D1, D21
Dual Diode, 225 mA, 300 V, CMPD2004S
Central Semiconductor
FB1, FB2
Ferrite Bead, BLM21AG601SN1
Murata
Q1, Q3
NPN, 300 V, MMBTA42
OnSemi, Fairchild
Q2
PNP, 300 V, MMBTA92
OnSemi, Fairchild
Q4, Q5
NPN, 80 V, 330 mW, MMBTA06
OnSemi, Fairchild
RV1
Sidactor, 275 V, 100 A
Teccor, Protek, ST Micro
R1
1.07 k
, 1/2 W, 1%
Venkel, SMEC, Panasonic
R2
150
, 1/16 W, 5%
Venkel, SMEC, Panasonic
R3
3.65 k
, 1/2 W, 1%
Venkel, SMEC, Panasonic
R4
2.49 k
, 1/2 W, 1%
Venkel, SMEC, Panasonic
R5, R6
100 k
, 1/16 W, 5%
Venkel, SMEC, Panasonic
R7, R8
20 M
, 1/16 W, 5%
Venkel, SMEC, Panasonic
R9
1 M
, 1/16 W, 1%
Venkel, SMEC, Panasonic
R10
536
, 1/4 W, 1%
Venkel, SMEC, Panasonic
R11
73.2
, 1/2 W, 1%
Venkel, SMEC, Panasonic
R12, R13
56
, 1/16 W, 1%
Venkel, SMEC, Panasonic
R15, R162
0
, 1/16 W
Venkel, SMEC, Panasonic
U1
Si2494/39
Silicon Labs
U2
Si3018
Silicon Labs
32.768 kHz, 12 pF, 100 ppm, 35 k
max ESR
ECS Inc., Siward
4.9152 MHz, 20 pF, 100 ppm, 150
ESR
27 MHz (from external clock)
Z1
Zener Diode, 43 V, 1/2 W, BZT84C43
On Semi
Notes:
1.
Several diode bridge configurations are acceptable. For example, a single DF04S or four 1N4004 diodes may be used.
2.
Murata BLM21AG601SN1 may be substituted for R15–R16 (0
) to decrease emissions.
3.
To ensure compliance with ITU specifications, frequency tolerance must be less than 100 ppm including initial
accuracy, 5-year aging, 0 to 70 °C, and capacitive loading. For optimal V.92 PCM upstream performance, the
recommended crystal accuracy is ±25 ppm.
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