SC91710AS SILAN [Silan Microelectronics Joint-stock], SC91710AS Datasheet - Page 5

• Manufacturer Part Number: SC91710AS
• Description: T/P SWITCHABLE DIALER WITH REDIAL HANDFREE FUNCTION
• Manufacturer: SILAN [Silan Microelectronics Joint-stock]

PIN DESCRIPTION
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
SC91710A/AS SC91710B
14
15
16
13
4
1
2
3
5
6
7
8
9
Pin No.
16
17
18
15
11
4
1
2
3
5
6
7
8
Pin Name
XMUTE
OSCO
OSCI
V
V
C2
C3
C4
R2
R3
R4
C1
R1
DD
SS
* Provides keyboard scanning.
*
* The keypad is compatible with the standard dual contact matrix
* When
* Activation of two or more keys will result in no response, except
* To avoid keyboard-bouncing error, this chip provides built-in
* Oscillator input & output pins.
* The 3.579545MHz oscillator is formed by a built-in inverter inside
* When
* Mute output pins.
* NMOS open drain output structure.
* The output is in “ LOW” state during dialing sequence (both Pulse
* Long (continue) Mute.
* Negative power supply pin.
* Positive power supply pin.
and Tone mode) otherwise this pin is “ high-impedance” .
row group stays in “ LOW” state.
keyboard (as figure1b), the inexpensive single contact keyboard
(as figure 1a), and electronic input (as figure 1c).
& Column connection or by electronic input (as shown in figure
1c).
for single key.
debounce circuit. (The debounce time = 20ms)
of this chip and by connecting a 3.579545MHz crystal or a
ceramic resonator across the OSCI and OSCO pins. (built-in
feedback resistor and capacitor)
and generates a 3.579545 MHz clock.
HKS
Figure1a: Single contact form
pin is LOW, the column group stays in “ HIGH” state and
Row
HKS
HKS
Figure1c: Electronic signal input keyboard configuration
keyboard configuration
is “ LOW” , a valid key entry is defined by related Row
is “ LOW” , a valid key-in may turn on this oscillator
Column
Row
Column
Description
Figure1b: Dual contact form
keyboard configuration
V
V
V
V
Column
DD
SS
DD
SS
REV:2.2
Row
SC91710A/B
(To be continued)
Page 5 of 18
2007.03.07