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參數(shù)資料
| 型號： | LC73701M |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | DTMF/PULSE Output Serial Interface Dialler(DTMF/PULSE輸出模式串行接口撥號器) |
| 中文描述： | 雙音多頻/脈沖輸出串行接口撥號器（雙音多頻/脈沖輸出模式串行接口撥號器） |
| 文件頁數(shù)： | 9/11頁 |
| 文件大小： | 111K |
| 代理商： | LC73701M |
No. 5561-9/11
LC73701M
Continued from preceding page.
Notes:
(1) The LC73701M output ports are initialized to the following states when power is first applied.
BUSYOUT and DP pins: Low
DTMF, MUTE1, MUTE, and MUTE2 pins: High-impedance
OSC0 pin: High
(2) The following methods can be used to forcibly terminate dial output.
1. STOP command input
Output ports: The DP and MUTE1 pins hold their previous states, all others are initialized.
Redialing is possible after a STOP command is input. However, this requires that a dialing operation had been
performed previously.
2. Applying a low-level pulse (of at least 1 μs) to the RES pin.
The operation is identical to that of the STOP command.
However, redialing is not possible after this hardware reset.
3. ON-HOOK command input
The DP pin goes low, thus releasing the telephone line (circuit). Redialing is possible after an ON-HOOK
command is input. However, if this dialing operation is performed, although DTMF signals will be output, since
the DP is low dial pulses will not be output. (Since the LSI performs a redial operation internally, the BUSYOUT
pin will go high and the associated muting signal will also be output.)
4. OFF-HOOK command input
A hooking pause will be inserted automatically after the OFF-HOOK command input. Redialing is possible.
5. FLASH command input
A hooking pause will be inserted automatically after the FLASH command input. Redialing is possible.
(3) The MUTE ST and MUTE END commands
These commands allows the MUTE1 pin to be controlled arbitrarily. The other muting outputs cannot be controlled
explicitly.
The figure below shows the timing.
When a MUTE ST command is input, the MUTE1 pin goes low. During this low period, inputting pulse dial data
will not cause the MUTE1 pin to return to the high level. That is, the low level is held until the next MUTE END
command is input.
Pin No.
Pin
Internal circuit
14
DTMF
18
DP
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| LC73711 | Switchable DTMF/Pulse Dialer with Memory |
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| LC73710 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LC73711 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Switchable DTMF/Pulse Dialer with Memory |
| LC73711N | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Switchable DTMF/Pulse Dialer with Memory |
| LC73720 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Dialer with Memory |
| LC737212 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Telephone Dialer IC with On-Chip Memory for Push- Button Telephones |
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