TS810CXERF [TSC]

Microprocessor Reset Circuit; 微处理器复位电路


型号：	TS810CXERF
厂家：	TAIWAN SEMICONDUCTOR COMPANY, LTD
描述：	Microprocessor Reset Circuit 微处理器复位电路微处理器复位电路
文件：	总7页 (文件大小：328K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

TS809/810/809R/810R Series

Microprocessor Reset Circuit

Pin Definition:

TS809/TS810

1. Ground

SOT-23

TS809R/TS810R

1. RESET(RESET)

2. Ground

2. RESET(RESET)

3. Vcc

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

Ordering Information

●

Highly Accurate: ±2%

Part No.

TS809CXx RF

TS810CXx RF

TS809RCXx RF

TS810RCXx RF

Package

Packing

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

supply voltage

SOT-23

3Kpcs / 7” Reel

●

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

Note: x is the threshold voltage type, option as

A : 4.63V

E : 2.93V

I : 2.0V

B : 4.38V C : 4.00V D : 3.08V

F : 2.63V G : 2.32V H : 2.1V

Guaranteed reset valid to Vcc = +1V

Power supply transient immunity

No external components

Application Circuit

Applications

●

Battery-operated systems

Controllers

Intelligent instruments

Critical uP and uC power monitoring

Portable / Battery powered equipment

Automotive

Pin Descriptions

Name

Description

Gnd

RESET

(RESET)

Vcc

Ground

RESET – TS809 / TS809R (Active Low)

(RESET) – TS810 / TS810R (Active High)

Operating voltage input

1/7

Version: A07

TS809/810/809R/810R Series

Microprocessor Reset Circuit

Absolute Maximum Rating

Parameter

Symbol

V_CC

Maximum

Unit

Terminal Voltage (with respect to Gnd)

RESET & (RESET) push-pull

Input Current, V_CC

V_RESET

I_CC

- 0.3 ~ (VCC +0.3)

V/uS

^oC

Output Current, RESET, (RESET)

Rate of Rise, V_CC

I_O

V_R

100

Continuous Power Dissipation

Operating Junction Temperature Range

Storage Temperature Range

Lead Soldering Temperature (260^oC)

P_D

320

T_OPR

T_STG

T_LEAD

-40 ~ +125

-65 ~ +150

^oC

Electrical Specifications (Ta = 25^oC, unless otherwise noted)

Parameter

Conditions

Ta=-40^oC~+85^oC

Symbol

Min

1.0

Typ

Max

5.5

Unit

Input Supply Voltage

V_CC

V_IN=V_IN*1.10

3.0

Supply Current

I_CC

V_IN=V_IN*1.10, Ta=-40^oC~+85^oC

TS809/809R/810/810RCXA

TS809/809R/810/810RCXB

TS809/809R/810/810RCXC

TS809/809R/810/810RCXD

TS809/809R/810/810RCXE

TS809/809R/810/810RCXF

TS809/809R/810/810RCXG

TS809CXH

5.0

4.56

4.31

3.94

3.03

2.89

2.59

2.28

2.07

1.97

4.63

4.38

4.00

3.08

2.93

2.63

2.32

2.1

4.7

4.45

4.06

3.13

2.97

2.67

2.35

2.13

2.03

Reset Threshold

V_TH

TS809CXI

2.0

Reset Threshold

ppm/

^oC

160

Temperature Coefficient

VCC to Reset Delay

Reset Active Timeout Period Ta=-40^oC~+85^oC

V_CC= V_TH- 100mV

T_DELAY

V_OL

140

210

500

RESET Output (TS809/R)

V_CC< V_TH(MAX), I_SINK=1.2mA

0.2

Voltage Low

V_CC> V_TH(MAX), I_SOURCE=0.5mA,

V_CC> 1.8V

RESET Output (TS809/R)

Voltage High

0.8

V_OH

V_OL

V_OH

VCC

V_CC> V_TH(MAX), I_SOURCE=0.15mA,

1.8V ≥ V_CC>1.0V

(RESET) Output (TS810/R)

Voltage Low

V_CC> V_TH(MAX), I_SINK=1.2mA

0.2

V_CC< V_TH(MAX), I_SOURCE=0.5mA,

V_CC> 1.8V

(RESET) Output (TS810/R)

Voltage High

0.8

VCC

V_CC> V_TH(MAX), I_SOURCE=0.15mA,

1.8V ≥ V_CC>1.0V

2/7

Version: A07

TS809/810/809R/810R Series

Microprocessor Reset Circuit

Application Note

Function Description

A microprocessor’s (µP’s) reset input starts the µP In a know state. The TS809/810/809R/810R assert reset to

prevent code-execution errors during power-up, power-down, or brownout conditions. 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. The TS809/810/809R/810R have a push-pull output stage.

Applications Information

Negative-Going VCC transients in addition to issuing a reset to the µP during power-up, power-down, and brownout

conditions, the TS809/810 are relatively immune to short-duration negative-going Vcc transients (glitches).

The TS809/810/809R/810R do not generate a reset pulse. The graph was generated using a negative going pulse

applied to Vcc, starting 0.5V above the actual reset threshold and ending below it by the magnitude indicated (reset

comparator overdrive). The graph indicates the maximum pulse width a negative going Vcc transient can have

without causing a reset pulse. As the magnitude of the transient increases (goes farther below the reset threshold),

the maximum allowable pulse width decreases. Typically, a Vcc transient that goes 100mV below the reset threshold

and lasts 20µS or less will not cause a reset pulse. A 0.1µF bypass capacitor mounted as close as possible to the

Vcc pin provides additional transient immunity.

Ensuring a Valid Reset Output Down to Vcc=0

When Vcc falls below 1V, the TS809/810/809R/810R reset output no longer sinks current - it becomes an open

circuit. Therefore, high impedance CMOS logic input connected to reset can drift to undetermined voltages.

This present no problem in most applications since most µP and other circuitry is inoperative with Vcc below

1V.However, in applications where reset must be valid down to 0V, adding a pull down resistor to reset causes and

stray leakage currents to flow to ground, holding reset low (Figure 2.) R1’s value is not critical; 100K is large enough

not to load reset and small enough to pull RESET to ground. For the TS809/810/809R/810R if reset is required to

remain valid for Vcc<1V.

Benefits of Highly Accurate Reset Threshold

Most µP supervisor ICs has reset threshold voltages between 5% and 10% below the value of nominal supply

voltages. This ensures a reset will not occur within 5% of the nominal supply, but will occur when the supply is 10%

below nominal. When using ICs rated at only the nominal supply ±5%, this leaves a zone of uncertainty where the

supply is between 5% and 10% low, and where the reset many or may not be asserted

Timming Diagram

3/7

Version: A07

TS809/810/809R/810R Series

Microprocessor Reset Circuit

Electrical Characteristics Curve

Figure 1. Reset Time vs. Temperature

Figure 2. Threshold vs. Temperature

Figure 3. IIN vs. Temperature

Figure 4. Reset Time vs. Temperature

Figure 5. I_INvs. V_IN

Figure 6. Reset Voltage vs. Temperature

4/7

Version: A07

TS809/810/809R/810R Series

Microprocessor Reset Circuit

Function Block

Marking Information

Identification

Code

Identification

Code

Identification

Code

Part No.

Code

ARK

ARN

ASB

ASA

AMO

AMP

ATT

TS809CXA

TS809CXB

TS809CXC

TS809CXD

TS809CXE

TS809CXF

TS809CXG

TS809CXH

TS809CXI

TS810CXA

TS810CXB

TS810CXC

TS810CXD

TS810CXE

TS810CXF

TS810CXG

ARJ

ALS

AAC

ASU

ALV

AZM

AAG

TS809RCXA

TS809RCXB

TS809RCXC

TS809RCXD

TS809RCXE

TS809RCXF

TS809RCXG

ABA

ABB

ATQ

ATO

AUV

ABF

ABG

TS810RCXA

TS810RCXB

TS810RCXC

TS810RCXD

TS810RCXE

TS810RCXF

TS810RCXG

ACA

ACB

ACC

ACD

ACE

ACF

ACG

ASK

BDT

5/7

Version: A07

TS809/810/809R/810R Series

Microprocessor Reset Circuit

SOT-23 Mechanical Drawing

SOT-23 DIMENSION

MILLIMETERS

MIN MAX

0.95 BSC

1.9 BSC

2.40

INCHES

MIN MAX.

DIM

0.037 BSC

0.074 BSC

3.00

1.80

3.10

1.40

0.15

0.50

0.25

0.094

0.118

0.070

0.122

0.055

0.059

0.020

0.009

1.40

2.70

1.00

0.00

0.35

0.09

0.055

0.106

0.039

0.000

0.014

0.003

0.35 BSC

0.0138 BSC

5º

10º

5º

10º

6/7

Version: A07

TS809/810/809R/810R Series

Microprocessor Reset Circuit

Notice

Specifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf,

assumes no responsibility or liability for any errors or inaccuracies.

Information contained herein is intended to provide a product description only. No license, express or implied, to any

intellectual property rights is granted by this document. Except as provided in TSC’s terms and conditions of sale for

such products, TSC assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale

and/or use of TSC products including liability or warranties relating to fitness for a particular purpose, merchantability,

or infringement of any patent, copyright, or other intellectual property right.

The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. Customers

using or selling these products for use in such applications do so at their own risk and agree to fully indemnify TSC for

any damages resulting from such improper use or sale.

7/7

Version: A07

TS810CXERF [TSC]

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