Pad Assignment

Pad Coordinates

Unit: mm

Pad No.

X

Y

1

-851.40

775.00

2

-851.40

494.60

3

-844.40

-203.90

4

845.90

-618.30

5

848.40

-4.30

6

845.90

332.60

7

844.40

572.60

* The IC substrate should be connected to VSS in the PCB layout artwork.

Pad Description

Pad No. Pad Name I/O

Internal

Connection

Description

1

X1

I

CMOS

32768Hz crystal input pad

2

X2

O

CMOS

Oscillator output pad

3

VSS

I

CMOS

Ground pin

4

REST

I

CMOS

Reset pin with serial transmission

5

I/O

I/O

CMOS

Data input/output pin with serial transmission

6

SCLK

I

CMOS

Serial clock pulse pin with serial transmission

7

VDD

I

CMOS

Power supply pin

Absolute Maximum Ratings

Supply Voltage..............................-0.3V to 5.5V

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

Operating Temperature ..................0°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 de-

vice at other conditions beyond those listed in the specification is not implied and prolonged

exposure to extreme conditions may affect device reliability.

HT1380/HT1381

2

October 2, 1999

1

2

3

4

5

6

7

(0 , 0 )

X1

X2

VSS

I/O

SC L K

VD D

RE S T