TAIWAN SEMICONDUCTOR TS803 Technical data

TS803

Microprocessor Reset Circuit

1/6 Version: A07

SOT-23

General Description

The TS803/TS803R 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 TS803/TS803R are open –drain outputs. The TS803/TS803R have an active low RESET
output, while the TS803/TS803R 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 TS803/TS803R ideal for use in portable equipment.

Features

● Precision monitoring of +3V, +3.3V & +5V power
supply voltage

● Fully specified over temperature

● Available in three output configurations

● Open-Drain RESET low output

● 3uA supply current

● Guaranteed reset valid to Vcc = +1V

● Power supply transient immunity

● No external components

Applications

● Computers

● Controllers

● Intelligent Instruments

● Critical uP and uC power monitoring

● Portable / Battery Power Equipment

● Automotive

Ordering Information

Note: x is the threshold voltage type, option as
TS803 Threshold Voltage
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

J

: 1.8V

K

:1.6V

TS803R Threshold Voltage
B

: 4.20V

E

: 2.93V

F

: 2.70V

Contact factory for additional voltage options.

Part No.

Package

Packing

TS803CXx RF

SOT-23

3Kpcs / 7” Reel

TS803RCXx RF

SOT-23

3Kpcs / 7” Reel

Absolute Maximum Rating

Parameter

Symbol

Value

Unit

Supply Voltage

VCC 7 V

RESET & (RESET) Open Drain

V

RESET

- 0.3 ~ (VCC +0.3)

V

Input Current, VCC

ICC

20

mA

Output Current, RESET

IO

20

mA

Rate of Rise, VCC

VR

100

V/uS

ESD Classification

B

Note: Stress above the listed absolute maximum rating may cause permanent damage to the device
HBM B: 2000V~3999V

Pin Definition:

TS803

TS803R

1. Ground

1. Reset

2. Reset

2. Ground

3. Vcc

3. Vcc

查询TS803CXARF供应商

TS803

Microprocessor Reset Circuit

2/6 Version: A07

Recommended Operating Conditions

Parameter

Symbol

Value

Unit

Supply Voltage

VCC

<5

V

Operating Ambient Temperature Range

TA

-40 ~ +85

o

C

Operating Junction Temperature Range

TJ

-40 ~ +125

o

C

Storage Temperature Range

T

STG

-65 ~ +150

o

C

Thermal Resistance

Θjc

325

o

C/W

Power Dissipation

PD

350

mW

Lead Soldering Temperature (260oC)

T

LEAD

10

S

Electrical Characteristics Ta=25

o

C, unless otherwise specified.

Parameter

Conditions

Symbol

Min

Typ

Max

Unit

Input Supply Voltage

Ta=-40oC~+85oC

VCC

1.0

--

5.5

V

V

CC

≤ VTH * 1.1

--

--

3
Supply Current
VIN = 3V, Ta=-40oC~+85oC

ICC

--

--

5

uA

Reset Threshold

VTH

0.985

|VTH|

--

1.015

|VTH|

V

Reset Threshold

(Full temperature range)

VTH

0.97

|VTH|

--

1.02

|VTH|

V

Reset Threshold

Temperature Coefficient

VTH

3-0

50

160

ppm/ oC

VCC to Reset Delay

VCC = VTH to (VTH - 100mV)

--

40

--

uS

Reset Active Timeout Period

Ta=-40oC~+85oC

T

DELAY

0.5

1.5 5 mS

RESET Output Voltage Low

VCC < V

TH(MIN), ISINK

=1.2mA,

VOL

--

--

0.5

V

VCC > V

TH(MAX), ISOURCE

=500uA

VCC > 1.8V
RESET Output Voltage High
VCC > V

TH(MAX), ISOURCE

=150uA,

1.8V >= VCC > 1V

VOH

0.8 VCC

-- -- V

Note 1: The data based on VTH = 2.7V part type.
Note 2: Guaranteed by Design