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HT9302A Fiches technique(PDF) 6 Page - Holtek Semiconductor Inc

No de pièce HT9302A
Description  1-Memory/2-Memory Tone/Pulse Dialer
PDF  27 Pages
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Fabricant  HOLTEK [Holtek Semiconductor Inc]
Site Internet  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT9302A Fiches technique(HTML) 6 Page - Holtek Semiconductor Inc

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Pulse Mode Electrical Characteristics
fOSC=3.5795MHz, Ta=25
°C
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
VDD
Conditions
IPOH
PO Output Source Current 2.5V VOH=2V
-0.2
¾¾
mA
IPOL
PO Output Sink Current
2.5V VOL=0.5V
0.2
0.6
¾
mA
PR
Pulse Rate
¾
MODE pin is connected to VDD
¾
10
¾
pps
MODE pin is opened
¾
20
¾
M/B
Make/Break Ratio
¾
A resistor is linked between R2
and C1
¾
33:66
¾
%
No resistor is linked between
R2 and C1
¾
40:60
¾
tPDP
Pre-digit-pause Time
¾
M/B ratio=40:60
¾
40 (10pps)
20 (20pps)
¾
ms
M/B ratio=33:66
¾
33 (10pps)
17 (20pps)
¾
tIDP
Inter-digit-pause Time
¾
Pulse rate=10pps
¾
800
¾
ms
Pulse rate=20pps
¾
500
¾
tM
Pulse Make Duration
¾
A resistor is linked between R2
and C1
¾
33 (10pps)
17 (20pps)
¾
ms
No resistor is linked between
R2 and C1
¾
40 (10pps)
20 (20pps)
¾
tB
Pulse Break Duration
¾
A resistor is linked between R2
and C1
¾
66 (10pps)
33 (20pps)
¾
ms
No resistor is linked between
R2 and C1
¾
60 (10pps)
30 (20pps)
¾
Tone Mode Electrical Characteristics
fOSC=3.5795MHz, Ta=25
°C
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
VDD
Conditions
VTDC
DTMF Output DC Level
¾¾
0.45VDD
¾
0.7VDD
V
ITOL
DTMF Sink Current
2.5V VDTMF=0.5V
0.1
¾¾
mA
VTAC
DTMF Output AC Level
¾ Row group, RL=5kW
0.12
0.155
0.18
Vrms
RL
DTMF Output Load
2.5V THD
£-23dB
5
¾¾
k
W
ACR
Column Pre-emphasis
2.5V Row group=0dB
1
2
3
dB
THD
Tone Signal Distortion
2.5V RL=5k
W¾
-30
-23
dB
tTMIN
Minimum Tone Duration
¾ Auto-redial
Others
¾
82.5
¾
ms
9302G
¾
100
¾
tITPM
Minimum Inter-tone Pause
¾ Auto-redial
Others
¾
85.5
¾
ms
9302G
¾
106
¾
THD (Distortion) (dB) = 20 log
(
)
V1
V2
Vn /
Vi
Vh
22
222
++
+
K
Vi, Vh: Row group and column group signals
V1, V2, ... Vn: Harmonic signals (BW=300Hz~3500Hz)
HT9302 Series
Rev. 1.20
6
September 30, 2002



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