MV5089 Zarlink Semiconductor, MV5089 Datasheet - Page 2

• Manufacturer Part Number: MV5089
• Description: Dtmf Generator
• Manufacturer: Zarlink Semiconductor

FEATURES
technology and offers low power and wide voltage operation.
An inexpensive 3.58MHz TV crystal completes the reference
oscillator. From this frequency are derived 8 different
sinusoidal frequencies which, when appropriately mixed,
provide Dual-Tone Multi-Frequency (DTMF) tones.
keyboard and the keyboard entries determine the correct
division of the reference frequency by the row and column
counters.
a staircase approximation of a sinewave with low total distortion.
and temperature range are maintained within industry
specifications.
Pin-for-Pin Replacement for MK5089
Low Standby Power
Minimum External Parts Count
2.75V to 10V Operatlon
2-of-8 Keyboard Input
High Accuracy Tones Provided by 3.58MHz Crystal
Oscillator
Pin-Selectable Inhibit of Single Tone Generation
The MV5089 is fabricated using ISO-CMOS high density
Inputs are compatible with a standard 2-of-8 active-low
D-to-A conversion, using R-2R ladder networks, results in
Frequency and amplitude stability over operating voltage
OSC
OUT
OSC
IN
V
V
DD
SS
KEYBOARD LOGIC
KEYBOARD LOGIC
1
1
COLUMN INPUTS
ROW INPUTS
2
2
3
3
4
4
4
R
R
R
R
R
R
R
R
R
R
R
R
C
C
C
C
Figure 2: Functional block diagram
DTMF GENERATOR
COUNTER
COUNTER
V
COLUMN
DD
ROW
V
V
DD
MV5089
SS
SINGLE TONE
INHIBIT
COUNTER
COUNTER
WAVE
WAVE
SINE
SINE
KEYBOARD LOGIC
APPLICATIONS
DTMF Signalling for
Telephone Sets
Mobile Radio
Remote Control
Point-of-Sale and Banking Terminals
Process Control
CONVERTER
CONVERTER
D/A
D/A
TONE DISABLE
V
SS
1
COLUMN 1
COLUMN 2
COLUMN 3
/ 2
Figure 1: Pin connections - top view
V
OSC OUT
DD
OSC IN
+
-
V
V
DD
SS
V
V
DD
DD
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
TONE OUT
TONE
DISABLE
ANY KEY
DOWN
9
TONE OUT
SINGLE TONE INHIBIT
ROW 1
ROW 2
ROW 3
ROW 4
ANY KEY DOWN
COLUMN 4
DP16
MP16
DS3126-2.0 June 1993
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