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PDF HT9201B Data sheet ( Hoja de datos )
| Número de pieza | HT9201B | |
| Descripción | (HT9201A/B) Simple Tone Dialer | |
| Fabricantes | Holtek Semiconductor | |
| Logotipo |  |
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HT9201A/B
Simple Tone Dialer
Features
Patent Number: 113235(R.O.C.), 5424740(U.S.A.)
• Operating voltage: 2.0V~5.5V
• Low standby current
• 4×4 keyboard matrix
• 3.58MHz crystal or ceramic resonator
• Four flash key times selectable for the
HT9201B
General Description
The HT9201A/B tone dialers are CMOS LSIs
designed for telecommunication systems. The
HT9201A is for mute output whereas the
HT9201B is for flash output. Both dialers pro-
vide good performance for regular DTMF dial-
ing with low distortion output and minimal ex-
ternal components.
Selection Table
Function
MUT E
Item
HT9201A √
HT9201B —
XMUT E
√
√
F1,F2,F3,F4
Flash T ime(ms)
—
A,B,C,D
Package
DT MF Output
√ 16 DIP
600/300/200/90
—
16 DIP
Pin Assignment
1 3rd Dec ’97
1 page  
HT9201A/B
Functional Description
Keyboard matrix
C1~C4 and R1~R4 form a keyboard matrix. The
keyboard arrangement for each of the HT9201
series are shown in the Keyboard Information.
Tone frequency
Tone
Name
Output
Frequency (Hz)
Specified Actual
R1 697 699
R2 770 766
R3 852 847
R4 941 948
C1
1209
1215
C2
1336
1332
C3
1477
1472
C4
1633
1645
% Error
+0.29%
–0.52%
–0.59%
+0.74%
+0.50%
–0.30%
–0.34%
+0.73%
Note: % Error does not contain the crystal frequency
drift
Key definition
• 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, ∗, #, A, B, C, D keys
These are the dialing number input keys for
normal operation.
Timing Diagrams
• F1, F2, F3, F4
The flash keys can be selected with different
flash times as shown in the following table.
Flash time selection table
Key
F1
F2
Flash Time (ms)
600
300
F3 200
F4 90
Keyboard operation
5 3rd Dec ’97
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet HT9201B.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| HT9201A | (HT9201A/B) Simple Tone Dialer | Holtek Semiconductor |
| HT9201B | (HT9201A/B) Simple Tone Dialer | Holtek Semiconductor |
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