SC91215-A SILAN [Silan Microelectronics Joint-stock], SC91215-A Datasheet - Page 7

• Manufacturer Part Number: SC91215-A
• Description: T/P SWITCHABLE DIALER WITH REDIAL HANDFREE FUNCTION
• Manufacturer: SILAN [Silan Microelectronics Joint-stock]

(Continued)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
SC9121
(N.A.)
(N.A.)
4A
13
14
15
16
10
11
12
9
7
8
6
5
SC9121
(N.A.)
4B
11
15
16
17
18
12
13
14
7
8
9
6
5
Pin No.
SC9121
(N.A.)
4C
10
18
14
15
16
17
11
12
13
1
8
9
7
6
SC9121
4D
12
20
10
16
17
18
19
13
14
15
1
8
9
7
6
XMITMUTE
MODE
Name
TONE
HFO
OUT
V
V
Pin
HFI
DP
R2
R3
R4
R1
C2
C3
C1
DD
SS
Dialing pulse output
This is an N-channel open drain output. The
normal output will be “ ON” during break an “ OFF”
during make in the PULSE DIALING mode.
Hands-Free Control I/O pins
These pins enable and disable the Hands-Free
control function. When input pin
Hands-Free Control state is toggled on. The status
of the Hands-Free control state is listed in the
following table:
Tone dialing output
When a valid key-press is detected in the DTMF
mode, appropriate low group and high group,
frequencies the dual tone output. TONE output is
in the “ OFF” state in PULSE mode.
Dialing transmission mute output
This is an N-channel open drain output. The
dialing this output is “ ON” .
Mode output pin
This is an N-channel, open drain output. It is “ ON”
during tone output and “ OFF” during pulse output.
Keyboard pins
This input serves as the interface to an XY matrix
keyboard. On a 4 X 4 matrix keyboard, the input
from the fourth column,
to V
Power supply pins
These devices are designed to operate from 2.0V
to 5.5V.
XMITMUTE
SS
.
is normally “ OFF” . During pulse or DTMF
SC91214/91215 SERIES
Description
C4
, should be connected
REV:1.0
HFI
goes low, the
Page 7 of 16
2004.08.03