TS809/810/809R/810R Series

Microprocessor Reset Circuit

1/7

Version: A07

SOT-23

General Description

The TS809/810 series are microprocessor (µP) supervisory circuit used to monitor the power supplies in µP and

digital systems. They provide excellent circuit reliability and low cost by eliminating external components and

adjustments when used with +5V, +3.3V, +3.0V powered circuits. These circuits perform a single function: they assert

a reset signal whenever the VCC supply voltage declines below a preset threshold, keeping it asserted for at least

140ms after VCC has risen above the reset threshold. Reset thresholds suitable for operation with a variety of supply

voltages are available. The TS809/810 series have push pull outputs. The TS809/809R have an active low RESET

output, while the TS810/810R has an active high (RESET) output. The reset comparator is designed to ignore fast

transients on VCC, and the output guaranteed to be in the correct logic state for VCC down to 1V. Low supply correct

makes the TS809/810 series ideal for use in portable equipment.

Features

●

Highly Accurate: ±2%

●

Precision monitoring of +3V, +3.3V and +5V power

supply voltage

●

Fully specified over temperature

●

Available in three output configurations

●

Push-Pull RESET low output (TS809/TS809R)

●

Push-Pull (RESET) high output (TS810/TS810R)

●

140mS min. power-on reset pulse width

●

12uA supply current

●

Guaranteed reset valid to Vcc = +1V

●

Power supply transient immunity

●

No external components

Ordering Information

Note: x is the threshold voltage type, option as

A : 4.63V

B : 4.38V

C : 4.00V

D : 3.08V

E : 2.93V

F : 2.63V

G : 2.32V

H : 2.1V

I : 2.0V

Part No.

Package

Packing

TS809CXx RF

SOT-23

3Kpcs / 7” Reel

TS810CXx RF

SOT-23

3Kpcs / 7” Reel

TS809RCXx RF

SOT-23

3Kpcs / 7” Reel

TS810RCXx RF

SOT-23

3Kpcs / 7” Reel

Applications

●

Battery-operated systems

●

Controllers

●

Intelligent instruments

●

Critical uP and uC power monitoring

●

Portable / Battery powered equipment

●

Automotive

Pin Descriptions

Name

Description

Gnd

Ground

RESET

(RESET)

RESET – TS809 / TS809R (Active Low)

(RESET) – TS810 / TS810R (Active High)

Vcc

Operating voltage input

Application Circuit

Pin Definition:

TS809/TS810

TS809R/TS810R

1. Ground

1. RESET(RESET)

2. RESET(RESET)

2. Ground

3. Vcc

3. Vcc