8

CAT809, CAT810

Doc. No. 3004, Rev. S

Patent Pending

To ensure that the CAT809

Ω pull-down resistor

between

RESET pin and GND is recommended; the value is not critical. For the CAT810, a pull-up resistor from

BI-DIRECTIONAL RESET PIN INTERFACING

The CAT809/810 can interface with

µP/µC bi-directional reset pins by connecting a 4.7 kΩ resistor in series with the

CAT809/810 reset output and the

µP/µC bi-directional reset pin.

CAT809

GND

VCC

100k

Ω

Power

Supply

RESET

CAT810

GND

VCC

100k

Ω

Power

Supply

RESET

FIGURE 3.

RESET

RESET

RESET

RESET

RESET Valid with VCC Under 1.0 V

FIGURE 4. RESET Valid with VCC Under 1.1 V

FIGURE 5. Bi-directional Reset Pin Interfacing

CAT809

GND

VCC

4.7k

Ω

Power

Supply

RESET

Buffered

RESET

BUF

RESET

INPUT

GND

Bi-directional I/O Pin

µP

(For example: 68HC11)