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LC72701M

Sanyo Semicon Device
Part Number LC72701M
Manufacturer Sanyo Semicon Device
Description Serial Interface Dialler
Published Mar 22, 2005
Detailed Description CMOS LSI No. 5561 LC73701M Serial Interface Dialler Overview The LC73701M is a DTMP/pulse output dual-system dialer CM...
Datasheet PDF File LC72701M PDF File

LC72701M
LC72701M

Overview
CMOS LSI No.
5561 LC73701M Serial Interface Dialler Overview The LC73701M is a DTMP/pulse output dual-system dialer CMOS LSI for use in push-button telephones.
It provides an on-chip serial interface and operates under the control of data sent over that serial interface.
The LC73701M can be easily controlled by the system CPU using this dedicated interface.
• The dial pulse make ratio can be specified to be either 33 or 39%.
• Wide operating voltage range Pulse mode: VDD = 1.
5 to 5.
5 V DTMF mode: VDD = 2.
0 to 5.
5 V Package Dimensions unit: mm 3095-MFP18 [LC73701M] Functions • Functions as a dialer that is controlled over a serial interface.
• The built-in oscillator circuit (fOSC = 4.
19 MHz) can use either a crystal oscillator or a ceramic resonator as its oscillator element.
• The adoption of a high-precision (±0.
04%) DTMF signal frequency divider circuit allows a ceramic resonator to be used as the oscillator element.
• The buffer memory can store up to 32 digits of 5-bit data.
• Mode change and pause commands can also be stored as data in the buffer memory.
• Pauses can be inserted automatically on mode changes (auto-pause).
• A pause can be cancelled during that pause.
• The mode change function supports changing from pulse to tone (single direction).
• Generates all 16 DTMF signals.
• The pulse dialer output can be turned on or off arbitrarily.
• The pulse dialer output circuit can be selected to be either an n-channel open drain or a complementary circuit.
• The pulse dialer muting function can be turned on or off arbitrarily.
• A redial function is provided.
• Flash operation is supported.
(Data can be received during flash operation.
) • The flash time can be switched to be either 277 or 707 ms.
• The pause time can be switched to be either 2 or 4 seconds.
• Hooking pause operation is supported.
(1.
2 s or 801 ms) • The dial pulse rate can be specified to be either 10 pps or 20 pps.
SANYO: MFP18 SANYO Electric Co.
,Ltd.
Semiconductor Bussiness Headquarte...


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