TSC TS803R Technical data

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TS803R

Pin assignment

TS803R

1. RESET

2. Gnd

3. Vcc

Microprocessor Reset Circuit

Threshold Voltage Option

Open Drain

2.7V, 2.93V, 4.2V

General Description

The 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 TS803R

are open –drain outputs. The TS803R have an active low 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 TS803R ideal for use in portable equipment.

The TS803R is available in a 3-pin SOT-23 package.

Features

Ordering Information

output, while the TS803R has an active high RESET

 Precision monitoring of +3V, +3.3V and +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 powered equipment

 Automotive

Absolute Maximum Rating

Part No. Enable

Function

TS803RCX B Active-Low 4.2V
TS803RCX E Active-Low 2.93V
TS803RCX F Active-Low 2.7V

Note: x is the threshold voltage type, option as

: 4.20V

B

: 2.93V

E

: 2.70V

F

Threshold

Voltage

Pin Descriptions

Pin No. Name Description

1 RESET Reset output pin

(Active- Low)

2 Gnd Ground

3 Vcc Operating voltage input

Package

SOT-23

Supply Voltage VCC 7 V

RESET & (RESET) push-pull V

Input Current, Vcc ICC 20 mA

Output Current, RESET I

Rate of Rise, Vcc VR 100 V/uS

- 0.3 ~ (VCC +0.3) V

RESET

20 mA

O

TS803R 1-1 2003/12 rev. E

Recommended Operating Conditions

Supply Voltage VCC <5 V

Operating Ambient Temperature Range Ta(op) -40 ~ +105

Operating Junction Temperature Range Tj(op) -40 ~ +125

Storage Temperature Range T

-65 ~ +150

STG

Thermal Resistance Θjc 325 oC /W

Power Dissipation PD 350 mW

o

C

o

C

o

C

Lead Soldering Temperature (260 oC) T

10 S

LEAD

Electrical Characteristics

Ta = 25

Input Supply Voltage Ta = 0 oC ~ +70 oC VCC 1.0 -- 5.5 V

Reset Threshold

Reset Threshold

(Full temperature range)

Reset Threshold

Temperature Coefficient

o

C, unless otherwise specified.

Parameter Conditions Symbol Min Typ Max Unit

V

≤ Vth * 1.1 -- -- 3 Supply Current

CC

≤ Vth * 1.1, Ta = full

V

CC

range

TS803RCXB 4.20
TS803RCXE 2.93
TS803RCXF
TS803RCXB 4.20
TS803RCXE 2.93
TS803RCXF

V

I

CC

-- -- 5

VTH 0.985|VTH|

1.015|VTH|

2.70

VTH 0.97|VTH|

1.03|VTH|

2.70

-- 30 -- ppm/

TH

uA

o

V

V

C

VCC to Reset Delay VCC = VTH to (VTH - 100mV) -- 40 -- uS

Reset Active Timeout Period Ta = 0 oC ~ +70 oC

RESET Output Voltage Low VCC < V

RESET Output Voltage High

VCC > V

TH(MIN), ISINK

TH(MAX), ISOURCE

=1.2mA, VOL -- -- 0.5 V

=500uA

T

DELAY

V

OH

0.5 1.5 5 mS

0.8 VCC

--

--

VCC > 1.8V

> V

V

CC

TH(MAX), ISOURCE

=150uA, 1.8V >= VCC > 1V

Note 1 : The data based on VTH = 2.7V part type.

TS803R 2-2 2003/12 rev. E

V