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HT9020B Datenblatt(Datasheet) 2 Page - Holtek Semiconductor Inc

Teile-Nr. HT9020B
Beschreibung  Call Progress Tone Detector
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Hersteller  HOLTEK [Holtek Semiconductor Inc]
Homepage  http://www.holtek.com
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Pin Description
Pin Name
I/O
Internal
Connection
Description
ENV
O
CMOS OUT
While an input signal is within specification, this pin will output the enve-
lope relative to the input signal with a typical 40ms timing delay.
VREF
O
CMOS OUT
1/2 VDD reference voltage output pin
When EN=VDD, the device will be turned off and VREF disabled.
SIN
I
CMOS IN
AC coupled analog signal input pin
VSS
¾¾
Negative power supply, ground
VDD
¾¾
Positive power supply
EN
I
CMOS IN
EN=VSS; Normal operation mode
EN=VDD; Device disabled.
X1
I
OSCILLATOR
The system oscillator consists of an inverter, a bias resistor and the
necessary on-chip load capacitor. Connect a standard 32.768kHz crys-
tal or ceramic resonator.
X2
O
OSCILLATOR
X1 and X2 terminals implement the oscillator function.
The oscillator is turned off in the standby mode.
Approximate internal connection circuits
Absolute Maximum Ratings
Supply Voltage..............................VSS
-0.3V to VDD+6V
Storage Temperature ............................
-55°Cto150°C
Input Voltage ............................ VSS
-0.3V to VDD+0.3V
Operating Temperature ..........................
-20°Cto75°C
Note: These are stress ratings only. Stresses exceeding the range specified under
²Absolute Maximum Ratings² may
cause substantial damage to the device. Functional operation of this device at other conditions beyond those
listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil-
ity.
HT9020B
Rev. 1.20
2
March 31, 2003
C M O S I N / O U T
C M O S O U T
C M O S I N
P u l l - l o w
C M O S I N
O S C I L L A T O R
X 1
X 2
E N
1 0 M W
2 0 p .
1 0 p .
V D D
V D D




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