Pin Assignment

Pad Assignment

Chip size: 36.4

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

Pad Coordinates

Unit:

mm

Pad No.

X

Y

Pad No.

X

Y

1

-252.875

303.663

4

247.074

-297.912

2

-252.875

-298.537

5

238.174

284.663

3

112.975

-314.687

6

126.674

284.663

Pad Description

Pad

No.

Pad

Name

I/O

Internal

Connection

Description

1

HF

I/O

CMOS

Connect to an antenna coil for normal operation. Open for data programming.

2

HF1

I/O

CMOS

Connect to an antenna coil for normal operation. Data I/O for programming.

3

VSS

¾¾

Negative power supply, ground

4

CLK

I

CMOS

Open for normal operation. Clock input for programming.

5

VPP

I

¾

Open for normal operation. High voltage supplies input for programming.

(Suggest 12.5V for programming)

6

VDD

¾¾

Open for normal operation, +6V supply input for programming.

HT672B

Rev. 1.10

2

November 23, 2004

1

2

3

4

8

7

6

5

H F

N C

N C

H F I

V C C

V P P

C L K

G N D

H T 6 7 2 B

8 D I P - A

( 0 , 0 )

H F

H F 1

G N D

C L K

V C C

V P P

1

2

3

4

5

6