ATA5021-TAQY

ATA5021-TAQY Datasheet

ATA5021

Part	Datasheet
ATA5021-TAQY	ATA5021-TAQY (pdf)

Related Parts	Information
ATA5021-TAPY 44	ATA5021-TAPY 44

PDF Datasheet Preview
ATA5021 Digital Window Watchdog Timer DATASHEET ● Low current consumption IVDD < 25µA ● RC oscillator ● Internal reset during power-up and supply voltage drops POR ● “Short” trigger window for active mode ● “Long” trigger window for sleep mode ● Cyclical wake-up of the microcontroller in sleep mode ● Trigger input ● Single wake-up input ● Reset output ● Enable output 9145H-AUTO-08/14 The digital window watchdog timer, ATA5021, is designed in Atmel’s state-of-the-art 0.8µm SOI technology SMART-I.S. 1. In applications where safety is critical, it is especially important to monitor the microcontroller. Normal microcontroller operation is indicated by a cyclically transmitted trigger signal, which is received by a window watchdog timer within a defined time window. A missing or a wrong trigger signal causes the watchdog timer to reset the microcontroller. The IC is tailored for microcontrollers, which can work in both full-power and sleep mode. With an additional voltage monitoring power-on reset and supply voltage drop reset , the Atmel ATA5021 offers a complete monitoring solution for micro-systems in automotive and industrial applications. Figure Block Diagram with External Circuit R1 VDD R2 OSC 8 6 RC oscillator C 10nF Reset 5 Microcontroller Trigger 2 Mode 3 Wake-up 1 OSC Input signal conditioning Power-on reset 7 GND State machine External switching Enable circuitry Test logic ATA5021 [DATASHEET] Pin Configuration Figure Pinning SO8 WUP 1 TRIG 2 MODE 3 ENA 4 8 OSC 7 GND 6 VDD 5 RESET Table Pin 1 5 6 7 8 Pin Description Symbol Function Wake-up input pull-down resistor There is one digitally debounced wake-up input. During the long watchdog window, each signal slope at the input initiates a reset pulse at pin Trigger input pull-up resistor It is connected to the microprocessor’s trigger signal. MODE Mode input pull-up resistor The processor’s mode signal initiates the switchover between the long and the short watchdog time. Enable output push-pull It is used for the control of peripheral components. It is activated after the processor triggers three times correctly. RESET Reset output open drain Resets the processor in the case of under-voltage condition, a wrong trigger event or if a wake-up event occurs during long watchdog period. Supply voltage GND Ground, reference voltage Ordering Information Extended Type Number ATA5021-TAPY ATA5021-TAQY Package Information Package SO8 Remarks Taped and reeled, Pb-free, small reel Taped and reeled, Pb-free, big reel A1 A2 A Pin 1 identity Package Drawing Contact: TITLE Package SO8 technical drawings according to DIN specifications Dimensions in mm COMMON DIMENSIONS Unit of Measure = mm Symbol MIN NOM MAX NOTE ATA5021 [DATASHEET] History 9145H-AUTO-08/14 9145G-AUTO-09/12 • Put datasheet in the latest template • Figure 1-1 “Block Diagram with External Circuit” on page 2 updated 9145F-AUTO-01/12 9145E-AUTO-11/11 • Section “RC Oscillator, Pin 8” on pages 4 to 5 changed Column “Deviation of New Formula versus Measurement” in Table 3-1 changed • Figure 4-1 “State Diagram of the Finite State Machine” on page 9 changed 9145D-AUTO-05/10 • Section “RC Oscillator, Pin 8” on pages 4 to 5 changed 9145C-AUTO-09/09 • Section “RC Oscillator, Pin 8” on page 4 changed • El. Char. Table rows changed • Put datasheet in the newest template 9145B-AUTO-05/09 • Section “”RC Oscillator, Pin 8” on pages 4 to 6 updated • Section “Microcontroller in Active Mode” on page 7 updated • Section 7 “Electrical Characteristics” numbers and on pages 10 to 11 updated 12 ATA5021 [DATASHEET] Atmel Corporation 1600 Technology Drive, San Jose, CA 95110 USA T +1 408 F +1 408 Atmel logo and combinations thereof, Enabling Unlimited SMART-I.S. , and others are registered trademarks or trademarks of Atmel Corporation in U.S. and other countries. Other terms and product names may be trademarks of others. DISCLAIMER The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN THE ATMEL TERMS AND CONDITIONS OF SALES LOCATED ON THE ATMEL WEBSITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, PUNITIVE, SPECIAL OR INCIDENTAL DAMAGES INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS AND PROFITS, BUSINESS INTERRUPTION, OR LOSS OF INFORMATION ARISING OUT OF THE USE OR INABILITY TO USE THIS DOCUMENT, EVEN IF ATMEL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Atmel makes no representations or warranties with respect to the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications and products descriptions at any time without notice. Atmel does not make any commitment to update the information contained herein. Unless specifically provided otherwise, Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life. SAFETY-CRITICAL, MILITARY, AND AUTOMOTIVE APPLICATIONS DISCLAIMER Atmel products are not designed for and will not be used in connection with any applications where the failure of such products would reasonably be expected to result in significant personal injury or death “Safety-Critical Applications” without an Atmel officer's specific written consent. Safety-Critical Applications include, without limitation, life support devices and systems, equipment or systems for the operation of nuclear facilities and weapons systems. Atmel products are not designed nor intended for use in military or aerospace applications or environments unless specifically designated by Atmel as military-grade. Atmel products are not designed nor intended for use in automotive applications unless specifically designated by Atmel as automotive-grade.

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ATA5021

Digital Window Watchdog Timer DATASHEET
● Low current consumption IVDD < 25µA ● RC oscillator ● Internal reset during power-up and supply voltage drops POR ● “Short” trigger window for active mode ● “Long” trigger window for sleep mode ● Cyclical wake-up of the microcontroller in sleep mode ● Trigger input ● Single wake-up input ● Reset output ● Enable output
9145H-AUTO-08/14

The digital window watchdog timer, ATA5021, is designed in Atmel’s state-of-the-art 0.8µm SOI technology SMART-I.S. 1. In applications where safety is critical, it is especially important to monitor the microcontroller. Normal microcontroller operation is indicated by a cyclically transmitted trigger signal, which is received by a window watchdog timer within a defined time window.

A missing or a wrong trigger signal causes the watchdog timer to reset the microcontroller. The IC is tailored for microcontrollers, which can work in both full-power and sleep mode. With an additional voltage monitoring power-on reset and supply voltage drop reset , the Atmel ATA5021 offers a complete monitoring solution for micro-systems in automotive and industrial applications.

Figure Block Diagram with External Circuit

R1 VDD

R2 OSC 8
6 RC oscillator

C 10nF

Reset 5

Microcontroller

Trigger 2 Mode 3

Wake-up 1

OSC Input signal conditioning

Power-on reset
7 GND

State machine

External
switching

Enable circuitry

Test logic

ATA5021 [DATASHEET]

Pin Configuration

Figure Pinning SO8

WUP 1 TRIG 2 MODE 3 ENA 4
8 OSC 7 GND 6 VDD 5 RESET

Table Pin 1
5 6 7 8

Pin Description

Symbol Function

Wake-up input pull-down resistor There is one digitally debounced wake-up input. During the long watchdog window, each signal slope at the input initiates a reset pulse at pin

Trigger input pull-up resistor It is connected to the microprocessor’s trigger signal.

MODE

Mode input pull-up resistor The processor’s mode signal initiates the switchover between the long and the short watchdog time.

Enable output push-pull It is used for the control of peripheral components. It is activated after the processor triggers three times correctly.

RESET

Reset output open drain Resets the processor in the case of under-voltage condition, a wrong trigger event or if a wake-up event occurs during long watchdog period.

Supply voltage

GND Ground, reference voltage
Ordering Information

Extended Type Number ATA5021-TAPY ATA5021-TAQY

Package Information

Package SO8

Remarks Taped and reeled, Pb-free, small reel Taped and reeled, Pb-free, big reel

A1 A2 A

Pin 1 identity

Package Drawing Contact:

TITLE Package SO8
technical drawings according to DIN specifications

Dimensions in mm

COMMON DIMENSIONS Unit of Measure = mm

Symbol MIN NOM MAX NOTE

ATA5021 [DATASHEET]

History
9145H-AUTO-08/14 9145G-AUTO-09/12
• Put datasheet in the latest template
• Figure 1-1 “Block Diagram with External Circuit” on page 2 updated
9145F-AUTO-01/12 9145E-AUTO-11/11
• Section “RC Oscillator, Pin 8” on pages 4 to 5 changed Column “Deviation of New Formula versus Measurement” in Table 3-1 changed
• Figure 4-1 “State Diagram of the Finite State Machine” on page 9 changed
9145D-AUTO-05/10
• Section “RC Oscillator, Pin 8” on pages 4 to 5 changed
9145C-AUTO-09/09
• Section “RC Oscillator, Pin 8” on page 4 changed
• El. Char. Table rows changed
• Put datasheet in the newest template
9145B-AUTO-05/09
• Section “”RC Oscillator, Pin 8” on pages 4 to 6 updated
• Section “Microcontroller in Active Mode” on page 7 updated
• Section 7 “Electrical Characteristics” numbers and on pages 10 to 11 updated
12 ATA5021 [DATASHEET]

Atmel Corporation
1600 Technology Drive, San Jose, CA 95110 USA

T +1 408

F +1 408

Atmel logo and combinations thereof, Enabling Unlimited SMART-I.S. , and others are registered trademarks or trademarks of Atmel Corporation in U.S. and other countries. Other terms and product names may be trademarks of others.

DISCLAIMER The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN THE ATMEL TERMS AND CONDITIONS OF SALES LOCATED ON THE ATMEL WEBSITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, PUNITIVE, SPECIAL OR INCIDENTAL DAMAGES INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS AND PROFITS, BUSINESS INTERRUPTION, OR LOSS OF INFORMATION ARISING OUT OF THE USE OR INABILITY TO USE THIS DOCUMENT, EVEN IF ATMEL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Atmel makes no representations or warranties with respect to the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications and products descriptions at any time without notice. Atmel does not make any commitment to update the information contained herein. Unless specifically provided otherwise, Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life.

SAFETY-CRITICAL, MILITARY, AND AUTOMOTIVE APPLICATIONS DISCLAIMER Atmel products are not designed for and will not be used in connection with any applications where the failure of such products would reasonably be expected to result in significant personal injury or death “Safety-Critical Applications” without an Atmel officer's specific written consent. Safety-Critical Applications include, without limitation, life support devices and systems, equipment or systems for the operation of nuclear facilities and weapons systems. Atmel products are not designed nor intended for use in military or aerospace applications or environments unless specifically designated by Atmel as military-grade. Atmel products are not designed nor intended for use in automotive applications unless specifically designated by Atmel as automotive-grade.

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived ATA5021-TAQY Datasheet file may be downloaded here without warranties.

Datasheet ID: ATA5021-TAQY 519164