H6006 EMMICRO [EM Microelectronic - MARIN SA], H6006 Datasheet

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H6006

Manufacturer Part Number
H6006
Description
Failsafe Watchdog
Manufacturer
EMMICRO [EM Microelectronic - MARIN SA]
Datasheet

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Description
The H6006 is a monolithic low power CMOS device
combining a programmable digital timer and a series of
voltage comparators on the same chip. The device is
specially convenient for Watch-Dog functions such as
microprocessor
watchdog part is designed to be used in all applications
where it is important that after the occurrence of a
malfunction the microprocessor system is stopped to avoid
further damage. The timeout warning signal ( TO ) can be
used to try to reactivate the system before halting it. The
voltage monitoring part provides double security by
combining both unregulated voltage and regulated voltage
monitoring simultaneously. The H6006 initializes the power-
on reset after V
V
signal for register saving and if the voltage drops further
below V
supply voltage down to 1.5 V and is therefore particularly
suited for start-up and shut-down control of microprocessor
systems
Typical Operating Configuration
Copyright © 2004, EM Microelectronic-Marin SA
IN
drops below V
Regulator
Voltage
RL
, RES goes active. The H6006 functions at any
R
IN
EM MICROELECTRONIC -
reached V
V
TCL
V
and
SL
IN
SS
, the H6006 gives an advanced warning
supply
SH
and V
SAVE
RES
voltage
V
TO
DD
DD
raises above 3.5 V. If
monitoring.
Failsafe Watchdog
NMI
RES
INT
I/O
processor
Micro-
5 V
Fig. 1
GND
The
1
Features
Applications
Pin Assignment
MARIN SA
Failsafe watchdog function: timeout warning after 1st
timeout period, reset after 2nd timeout period, reset
remains active to avoid further failures
Standard timeout period and power-on reset time
(10 ms), externally programmable if required
V
voltages for: power-on reset initialization, advanced
power-fail warning ( SAVE ), reset at power-down ( RES )
V
only if V
Internal voltage reference
Works down to 1.5 V supply voltage
Push-pull or Open drain outputs
Low current consumption
Available for normal and extended temperature range
SO8 package
Microprocessor and microcontroller systems
Point of sales equipment
Telecom products
Automotive subsystems
IN
DD
TCL
monitoring with 3 standard or programmable trigger
V
RC
V
monitoring: power-on reset initialization enabled
SS
IN
DD
SO8
≥ 3.5 V
H6006
www.emmicroelectronic.com
H6006
V
TO
SAVE
RES
DD
Fig. 2

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H6006 Summary of contents

Page 1

... H6006 gives an advanced warning IN SL signal for register saving and if the voltage drops further below V , RES goes active. The H6006 functions at any RL supply voltage down to 1.5 V and is therefore particularly suited for start-up and shut-down control of microprocessor systems Typical Operating Configuration ...

Page 2

... OH OH ≥ Input Resistance Thresholds R VIN 100k Ω 9.00 8.00 7.00 ~100M Ω 2.25 2.00 1.75 ~100M Ω 2.00 1.95 1. H6006 Symbol Min. Typ Max. Units T -40 + 1.5 5 100 R1 10 Min. Typ. Max 1.5 ...

Page 3

... Timer Power-on Timer Reset Stop Reset Start 3 Min. Typ. Max. 250 =25 ° 4.5 150 T TO/32 No Power-on Reset (as V > www.emmicroelectronic.com H6006 Units 500 ns µ 100 Table 5 Fig. 3 Conditions: V > timeout Fig. 4 ...

Page 4

... Timer Reset Timeout Timeout Band-Gap Reference Save Control Reset Control 3 Timer OSC TCL 4 Conditions: V > power-up sequence. Timer Reset Timer Timeout Stop SAVE RES Version Connections B1 1 and 3 A2 www.emmicroelectronic.com H6006 after Fig. 5 Fig Fig. 7 ...

Page 5

... Short circuits on the regulated supply voltage can ON be detected. Voltage Thresholds The H6006 is available with 3 different sets of thresholds : Copyright © 2004, EM Microelectronic-Marin SA Version B1: with internal voltage divider, resulting in thresholds for direct monitoring of the unregulated voltage without external components. > ...

Page 6

... Regulator R = 470 kΩ TCL 220 pF SS RESET H6006 starting with a low state TCL signal is TO reached V , during power-up, RES goes inactive After each subsequent timeout period SAVE RES RAM CS Disable www.emmicroelectronic.com ...

Page 7

... Monitoring and Power-On Reset and monitoring and watchdog function not used. IN monitoring is active. Versions A3 and B3 only. Fig TCL RC V RES SS R1 shortens H6006 5 VDC TCL TO SAVE V RES TCL TO SAVE V RES ...

Page 8

... H6006A3SO8B* H6006B1SO8A B1 8.00 H6006B1SO8B* H6006B2SO8A B2 2.00 H6006B2SO8B H6006B3SO8A B3 1.95 H6006B3SO8B * = non stock item. Might be available on request and upon minimum order quantity (please contact EM Microelectronic). Note: Other versions are no longer available EM Microelectronic-Marin SA cannot assume responsibility for use of any circuitry described other than circuitry entirely embodied Microelectronic-Marin SA product. EM Microelectronic-Marin SA reserves the right to change the circuitry and specifications without notice at any time ...

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