HT9020B(2003) Просмотр технического описания (PDF) - Holtek Semiconductor
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HT9020B Datasheet PDF : 7 Pages
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HT9020B
Pin Description
Pin Name I/O
ENV
O
VREF
O
SIN
I
VSS
¾
VDD
¾
EN
I
X1
I
X2
O
Internal
Connection
CMOS OUT
CMOS OUT
CMOS IN
¾
¾
CMOS IN
OSCILLATOR
OSCILLATOR
Description
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.
1/2 VDD reference voltage output pin
When EN=VDD, the device will be turned off and VREF disabled.
AC coupled analog signal input pin
Negative power supply, ground
Positive power supply
EN=VSS; Normal operation mode
EN=VDD; Device disabled.
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.
X1 and X2 terminals implement the oscillator function.
The oscillator is turned off in the standby mode.
Approximate internal connection circuits
C M O S IN /O U T
V DD
C M O S IN
CM OS OUT
V DD
C M O S IN
P u ll- lo w
O S C IL L A T O R
X1
X2
20p.
10M W
10p.
EN
Absolute Maximum Ratings
Supply Voltage..............................VSS-0.3V to VDD+6V
Input Voltage ............................ VSS-0.3V to VDD+0.3V
Storage Temperature ............................-55°C to 150°C
Operating Temperature ..........................-20°C to 75°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.
Rev. 1.20
2
March 31, 2003
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