7

IMP8

Bi-directional Reset Pin Interfacing

The IMP811/812 can interface with µP/µC bi-directional reset

pins by connecting a 4.7k

Ω resistor in series with the IMP809/810

reset output and the µP/µC bi-directional reset pin.

Power

Supply

IMP811

VCC

GND

GND

RESET

4.7k

Ω

811/12_06.eps

Bi-directional I/O Pin

(Example: 68HC11)

BUF

Buffered

RESET

µC or µP

RESET

Input

MR

Package Dimensions

Plastic SOT-143 (4-Pin)

E

A

C

L

e

A1

H

D

e

e1

B

B1

a = 0

°-8°

SOT-143 (4-Pin).eps

Inches

Millimeters

Min

Max

Min

Max

Plastic SOT-143 (4-Pin)

A

0.031

0.047

0.787

1.194

A1

0.001

0.005

0.025

0.127

B

0.014

0.022

0.356

0.559

B1

0.030

0.038

0.762

0.965

C

0.0034

0.006

0.086

0.152

D

0.105

0.120

2.667

3.048

E

0.047

0.055

1.194

1.397

e

0.070

0.080

1.778

2.032

e1

0.071

0.079

1.803

2.007

H

0.082

0.098

2.083

2.489

I

0.004

0.012

0.102

0.305

Figure 4. Bi-directional Reset Pin Interface