參數(shù)資料
型號(hào): MC145444
廠商: Motorola, Inc.
英文描述: Single-Chip 300-Baud Modem
中文描述: 單芯片300波特調(diào)制解調(diào)器
文件頁數(shù): 8/12頁
文件大小: 161K
代理商: MC145444
MC145444
8
MOTOROLA
Table 3. Transmit Attenuator Truth Table
A3
A2
A1
A0
Attenuation (dB)
0
0
0
0
0
0
0
0
1
1
0
0
1
0
2
0
0
1
1
3
0
1
0
0
4
0
1
0
1
5
0
1
1
0
6
0
1
1
1
7
1
0
0
0
8
1
0
0
1
9
1
0
1
0
10
1
0
1
1
11
1
1
0
0
12
1
1
0
1
13
1
1
1
0
14
1
1
1
1
15
Table 4. Tone Frequency Truth Table
T3
T2
T1
T0
Tone Frequency (Hz)
DTMF Mode
Single
Tone Mode
Low Group
High Group
Keyboard
Equivalent
0
0
0
0
941
1633
D
941
0
0
0
1
697
1209
1
697
0
0
1
0
697
1336
2
697
0
0
1
1
697
1477
3
697
0
1
0
0
770
1209
4
770
0
1
0
1
770
1336
5
770
0
1
1
0
770
1477
6
770
0
1
1
1
852
1209
7
852
1
0
0
0
852
1336
8
1336
1
0
0
1
852
1477
9
1477
1
0
1
0
941
1336
0
1336
1
0
1
1
941
1209
*
1209
1
1
0
0
941
1477
#
1477
1
1
0
1
697
1633
A
1633
1
1
1
0
770
1633
B
1633
1
1
1
1
852
1633
C
1633
相關(guān)PDF資料
PDF描述
MC145444P Single-Chip 300-Baud Modem
MC145446AFW Single-Chip 300-Baud Modem with DTMF Transceiver
MC145446A Single-Chip 300-Baud Modem with DTMF Transceiver
MC145446 Single-Chip 300-Baud Modem with DTMF Transceiver
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