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

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

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

Storage Temperature ............................

-55°Cto150°C

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 .