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PDF HT9170 Data sheet ( Hoja de datos )
| Número de pieza | HT9170 | |
| Descripción | DTMF Receiver | |
| Fabricantes | Holtek Semiconductor Inc | |
| Logotipo |  |
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HT9170
DTMF Receiver
Features
· Operating voltage: 2.5V~5.5V
· Minimal external components
· No external filter is required
· Low standby current (on power down mode)
· Excellent performance
· Tristate data output for mC interface
· 3.58MHz crystal or ceramic resonator
· 1633Hz can be inhibited by the INH pin
· HT9170B: 18-pin DIP package
HT9170D: 18-pin SOP package
General Description
The HT9170 series are Dual Tone Multi Fre-
quency (DTMF) receivers integrated with digi-
tal decoder and bandsplit filter functions. The
HT9170B and HT9170D types supply
power-down mode and inhibit mode operations.
All types of the HT9170 series use digital count-
ing techniques to detect and decode all the 16
DTMF tone pairs into a 4-bit code output.
Highly accurate switched capacitor filters are
employed to divide tone (DTMF) signals into
low and high group signals. A built-in dial tone
rejection circuit is provided to eliminate the
need for pre-filtering.
Selection Table
Function Operating
OSC
Tristate Power
Part No. Voltage Frequency Data Output Down
1633Hz
Inhibit
DV
DVB Package
HT9170B 2.5V~5.5V 3.58MHz
Ö
Ö Ö Ö ¾ 18 DIP
HT9170D 2.5V~5.5V 3.58MHz
Ö
Ö Ö Ö ¾ 18 SOP
1 December 20, 1999
1 page  
HT9170
Symbol
Parameter
IOH
IOL
fOSC
Source Current
(D0~D3, EST, DV)
Sink Current
(D0~D3, EST, DV)
System Frequency
Test Conditions
VDD
Conditions
5V VOUT=4.5V
Min. Typ. Max. Unit
-0.4 -0.8 ¾ mA
5V VOUT=0.5V
1.0 2.5 ¾ mA
5V Crystal=3.5795MHz 3.5759 3.5795 3.5831 MHz
A.C. Characteristics
fOSC=3.5795MHz, Ta=25°C
Symbol
Parameter
DTMF Signal
Test Conditions
VDD
Conditions
Min. Typ. Max. Unit
Input Signal Level
3V
5V
-36 ¾
-29 ¾
-6
dBm
1
Twist Accept Limit (Positive) 5V
¾ 10 ¾ dB
Twist Accept Limit (Negative) 5V
¾ 10 ¾ dB
Dial Tone Tolerance
5V
¾ 18 ¾ dB
Noise Tolerance
5V
¾ -12 ¾ dB
Third Tone Tolerance
5V
¾ -16 ¾ dB
Frequency Deviation
Acceptance
5V
¾ ¾ ±1.5 %
Frequency Deviation Rejection 5V
±3.5 ¾ ¾ %
Power Up Time (tPU)
(See Figure 4.)
5V
¾ 30 ¾ ms
Gain Setting Amplifier
RIN
IIN
VOS
PSRR
CMRR
AVO
Input Resistance
Input Leakage Current
Offset Voltage
Power Supply Rejection
Common Mode Rejection
Open Loop Gain
5V ¾
¾ 10 ¾ MW
5V VSS<(VVP,VVN)<VDD ¾ 0.1 ¾ mA
5V ¾
¾ ±25 ¾ mV
5V
100 Hz
5V -3V<VIN<3V
5V
¾ 60 ¾ dB
¾ 60 ¾ dB
¾ 65 ¾ dB
fT Gain Band Width
VOUT Output Voltage Swing
5V ¾
5V RL>100kW
¾ 1.5 ¾ MHz
¾ 4.5 ¾ VPP
5 December 20, 1999
5 Page 
Application Circuits
D TM F
100kW
0 .1 m F
100kW
T o o th e r d e v ic e
X 'T A L
C1 C2
VSS
V DD
1 V P V D D 18
2 V N R T /G T 1 7
3 GS
E S T 16
4 VREF
D V 15
5 IN H
D 3 14
6 PW DN
D 2 13
7 X 1 D 1 12
8 X 2 D 0 11
9 VSS
O E 10
H T 9 1 7 0 B /D
1 8 D IP /S O P
0 .1 m F
300kW
T o o th e r d e v ic e
N o te : ( a ) X 'T A L = 3 .5 7 9 5 4 5 M H z c r y s ta l
C 1 = C 2 @ 20pF
( b ) X 'T A L = 3 .5 8 M H z c e r a m ic r e s o n a to r
C 1 = C 2 @ 39pF
HT9170
11 December 20, 1999
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet HT9170.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
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| HT9170B | DTMF Receiver | Holtek Semiconductor Inc |
| HT9170D | DTMF Receiver | Holtek Semiconductor Inc |
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