Pin Assignment

Block Diagram

Pad Assignment

Unit:

Pad No.

X

Y

1

–919.00

480.30

2

–1007.00

–530.30

3

–226.99

–480.30

4

61.70

–480.30

5

515.20

–480.30

6

821.90

–480.30

7

1006.90

–530.30

8

957.00

289.10

9

894.20

480.30

10

–291.90

480.30

11

–532.50

480.30

Chip size: 2270

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

Pin Description

Pin No.

Pin Name

I/O

Internal

Connection

Description

1

OSC1

I

—

Oscillator input pin

2

FLAG1

O

NMOS

Open Drain

3Hz/6Hz flash output, busy output, end-pulse or

voice output indication (by mask option). Open

drain, active low output

3

VSS

I

—

Negative power supply (GND)

4

FLAG2

O

NMOS

Open Drain

3Hz/6Hz flash output or busy output (by mask

option), open drain, active low output

HT812D0

2

5th May ’98