Preliminary W91082N
TONE GENERATOR WITH
µC
SERIAL INTERFACE
GENERAL DESCRIPTION
The W91082N is Si-gate CMOS IC that provides DTMF signals. It can be programmed by a
µC
to
generate 16 dual tones and 8 single tones from the DTMF pin. The W91082N provides a serial mode
interface for various applications such as cordless, KTS, PBX and Caller ID system.
FEATURES
•
Operating voltage: 2.0V−5.5V
•
Generate 16 dual tones and 8 single tones
•
Serial mode interface with
µC
•
Uses 3.579545 MHz crystal or ceramic resonator
•
Packaged in 8-pin plastic DIP
PIN CONFIGURATION
CE
XT1
XT1
V
SS
1
2
3
4
8
7
6
5
V
DD
DTMF
DATA
CLK
PIN DESCRIPTION
SYMBOL
CE
PIN NO.
1
3, 2
I/O
I
I, O
FUNCTION
Chip enable signal, low active.
A built-in inverter provides oscillation with an inexpensive
3.579545 MHz crystal or ceramic resonater. The crystal
frequency deviation is
±0.02%.
Data input pin for serial receiving.
Clock input pin for serial receiving.
DTMF signal output pin.
Power input pins.
XT1,
XT1
DATA
CLK
DTMF
V
DD
, V
SS
6
5
7
8, 4
I
I
O
I
-1-
Publication Release Date: February 1998
Revision A1
WINBOND [ WINBOND ]
