Pin Description

Pin No. Pin Name I/O

Internal

Connection

Description

1, 2, 8,

24~28

NC

¾¾

No connection

3, 4, 5

PP0, PDA,

PP1

O

¾

Green Voice Speaker control pin

6

VDD

¾¾

Positive power supply

7

AUD

O

PMOS

Open Drain Audio output for driving an external transistor

15~9

PB1~PB7

I/O

Pull-high

or CMOS

Bidirectional I/O pins

Can be optioned as trigger inputs or LED outputs

16

PB0

I/O

Pull-high

or CMOS

Bidirectional I/O pins

Can be optioned as CDS interface with internal

Schmitt trigger input

20~17

PA0~PA3

I

Wake-up

Pull-high

Trigger inputs

Can also be configured as wake-up inputs

21, 22

VSS

¾¾

Negative power supply, ground

23

OSC

I

¾

Built-in RC oscillator

An oscillator resistor is connected between OSC and VSS

Absolute Maximum Ratings

Supply Voltage.................................-0.3V to 6V

Storage Temperature.................-50°Cto125°C

Operating Temperature ..............-20°Cto70°C

Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maxi-

mum 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 expo-

sure to extreme conditions may affect device reliability.

Electrical Characteristics

Ta=25°C

Symbol

Parameter

Test Conditions

Min. Typ. Max. Unit

Conditions

Operating Voltage

¾¾

2.4

¾

5.2

V

Standby Current

3V No load, system HALT

¾

13

mA

Operating Current

¾

58

mA

PB0~PB7 Sink Current

46

¾

mA

Max. AUD Output Current

-1.5

-2

¾

mA

System Frequency

3.6

4.0

4.4

MHz

HT85XXX

4

August 24, 2000