SC91215 データシートの表示（PDF） - Silan Microelectronics
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SC91215 Datasheet PDF : 16 Pages
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SC91214/91215 SERIES
PIN DESCRIPTION
SC9121
4A
3
4
Pin No.
SC9121 SC9121
4B
4C
3
4
4
5
SC9121
4D
4
5
2
2
3
3
Pin
Name
OSCI
OSCO
MODE
IN
Description
Oscillator Input and Output pins.
The time base for the SC91214/15 is a crystal
controlled on-chip oscillator, which is completed by
connecting a 3.58MHz crystal or ceramic
resonator between the OSCI and OSCO pins.
TRI-STATE mode select pin.
There ate two versions of the SC91214/15 as
follows:
a. SC91215 Series is for European and American
systems.
MODE IN
Tone/
Pulse
Dial
Rate
M/B
Ratio
VDD
Pulse 10pps
2/3
VSS
Tone
--
--
Floating
Pulse 10pps
1/2
b. The SC91214 Series is for the Japanese
system.
MODE IN
Tone/
Pulse
Dial
Rate
M/B
Ratio
VDD
Pulse 10pps 1/2
VSS
Tone
--
--
Floating Pulse 20pps 1/2
The mode selection pin is checked for tone/pulse
dialing as each digit key entery. In the PULSE
mode, the dialing rate is checked, along with the
make/break ratio, at first key entry.
1
1
2
2
(N.A.)
10
(N.A.)
11
HK
Hook switch input
This inverter input pin detects the state of the hook
switch contact. “Off Hook”is represented by a VDD
condition.
KT
Key-in tone output
This N-channel open drain pin sends out a “beep”
tone for each PULSE mode key entry, along with
entries of accepted function keys (RD, T, F1 F2,
an P keys). The tone output frequency is 437Hz
and tone duration is 23 ms.
(To be continued)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.0 2004.08.03
Page 6 of 16
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