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LC72701M Datasheet

  • LC72701M

  • Serial Interface Dialler

  • 11頁

  • SANYO

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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.
鈥?The dial pulse make ratio can be specified to be either
33 or 39%.
鈥?Wide operating voltage range
Pulse mode: V
DD
= 1.5 to 5.5 V
DTMF mode: V
DD
= 2.0 to 5.5 V
Package Dimensions
unit: mm
3095-MFP18
[LC73701M]
Functions
鈥?Functions as a dialer that is controlled over a serial
interface.
鈥?The built-in oscillator circuit (f
OSC
= 4.19 MHz) can use
either a crystal oscillator or a ceramic resonator as its
oscillator element.
鈥?The adoption of a high-precision (鹵0.04%) DTMF
signal frequency divider circuit allows a ceramic
resonator to be used as the oscillator element.
鈥?The buffer memory can store up to 32 digits of 5-bit
data.
鈥?Mode change and pause commands can also be stored as
data in the buffer memory.
鈥?Pauses can be inserted automatically on mode changes
(auto-pause).
鈥?A pause can be cancelled during that pause.
鈥?The mode change function supports changing from pulse
to tone (single direction).
鈥?Generates all 16 DTMF signals.
鈥?The pulse dialer output can be turned on or off
arbitrarily.
鈥?The pulse dialer output circuit can be selected to be
either an n-channel open drain or a complementary
circuit.
鈥?The pulse dialer muting function can be turned on or off
arbitrarily.
鈥?A redial function is provided.
鈥?Flash operation is supported. (Data can be received
during flash operation.)
鈥?The flash time can be switched to be either 277 or 707
ms.
鈥?The pause time can be switched to be either 2 or 4
seconds.
鈥?Hooking pause operation is supported. (1.2 s or 801 ms)
鈥?The dial pulse rate can be specified to be either 10 pps
or 20 pps.
SANYO: MFP18
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
53197HA(OT) No. 5561-1/11

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