Pad Name

I/O

Mask Option

Description

INT

I

Falling Edge Trigger

or Falling/Rising Edge

Trigger

External interrupt Schmitt trigger input without pull-high resistor. Choice

falling edge trigger or falling/rising edge trigger by mask option. Falling

edge triggered active on a high to low transition. Rising edge triggered

active on a low to high transition.

OSC1

OSC2

¾

RC or Crystal

OSC1 and OSC2 are connected to an RC network or a crystal (by mask

option) for the internal system clock. In the case of RC operation, OSC2

is the output terminal for 1/4 system clock.

The system clock may come from the crystal, the two pins cannot be

floating.

AUD

O

¾

Audio output for driving a external transistor or for driving HT82V733

NC

¾¾

No connection

TEST

¾¾

No connection (open)

Absolute Maximum Ratings

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

-50°Cto125°C

Operating Temperature ..........................

-20°Cto70°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.

D.C. Characteristics

Ta=25

°C

Symbol

Parameter

Test Conditions

Min. Typ. Max. Unit

Conditions

Operating Voltage

2.4

¾

5.2

V

Standby Current (Watchdog Off)

3V

No load, system HALT

¾¾

1

mA

5V

¾¾

2

Standby Current(Watchdog On)

3V

No load, system HALT

¾¾

7

mA

5V

¾¾

10

Operating Current (Crystal OSC)

3V

¾¾

3

mA

5V

¾¾

7

I/O Port Sink Current

3V

¾

4

¾

mA

5V

¾

10

¾

I/O Port Source Current

3V

¾-2

¾

mA

5V

¾-5

¾

AUD Source Current

3V

¾-3

¾

mA

5V

¾-6

¾

Input Low Voltage for I/O Ports

3V

¾¾

1.3

¾

V

Input High Voltage for I/O Ports

3V

¾¾

1.8

¾

V

Reset Low Voltage (RES)3V

¾¾

1.5

¾

V

Reset High Voltage (RES)3V

¾¾

2.4

¾

V

System Frequency

3V

W For HT86072, HT86144,

HT86192, HT86384 only

¾

4.0

¾

MHz

W¾

8.0

¾

W For HT86576, HT86768

only

¾

4.0

¾

W¾

8.0

¾

HT86XXX

Rev. 1.70

12

May 6, 2004