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What is H6060?

This electronic component, produced by the manufacturer "EM Microelectronic - MARIN SA", performs the same function as "Self Recovering Watchdog".


H6060 Datasheet PDF - EM Microelectronic - MARIN SA

Part Number H6060
Description Self Recovering Watchdog
Manufacturers EM Microelectronic - MARIN SA 
Logo EM Microelectronic - MARIN SA Logo 


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EM MICROELECTRONIC - MARIN SA
DATASHEET Ɩ H6060
Self Recovering Watchdog
Description
The H6060 is a monolithic low-power CMOS device
combining a programmable timer and a series of voltage
comparators on the same chip. The device is specially
suited for watchdog functions such as microprocessor and
supply voltage monitoring. If the P system malfunctions,
the watchdog will recover it by issuing repeated active reset
signals. The voltage monitoring part provides double
security by combining both the unregulated voltage (VIN)
and the regulated voltage (VDD) monitoring simultaneously.
The H6060 initializes the power-on reset after VIN reaches
VSH (see table 4) and VDD rises above 3.V. If VIN drops
below VSL (see table 4), the H6060 gives an advanced
warning signal for register saving and if the voltage drops
further below VRL (see table 4), RES and RES go active.
The H6060 functions at any supply voltage down to 1.6 V
and is therefore particularly suited for start-up and shut-
down control of microprocessor systems.
Typical Operating Configuration
Features
Self recovering watchdog function: reset goes active
after the 1st timeout period, reset goes inactive again
after the 2nd timeout period, repeated active reset signal
until the system recovers
Standard timeout period and power-on reset time (100
ms), externally programmable if required
Unregulated DC monitoring (VIN) with 3 standard or
programmable trigger voltages for: power-on reset
initialization, advanced power-fail warning ( SAVE ),
reset at power-down ( RES )
Regulated DC monitoring (VDD): power-on reset
initialization enabled only if VDD 3.5 V
Internal voltage reference
Works down to 1.6 V supply voltage
Push-pull or Open drain outputs
Low current consumption
SO8 package
Applications
Microprocessor and microcontroller systems
Point of sales equipment
Telecom products
Automotive subsystems
Pin Assignment
Voltage
Regulator
5V
VIN
TCL
VSS
VDD
RES
SAVE
RES
NMI
RES
I/O
Micro-
processor
GND
SO8
VIN
TCL
RC
VSS
H6060
VDD
RES
SAVE
RES
Fig. 1
Fig. 2
Copyright 2016, EM Microelectronic-Marin SA
6060-DS, Version 2.0, 3-Aug-16
1
www.emmicroelectronic.com
420005-A01, 3.0

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H6060 equivalent
DATASHEET Ɩ H6060
Pin Description
Pin Name Function
1 VIN
2 TCL
Voltage sense input
Timer clear input signal
3 RC
RC oscillator tuning input
4 VSS
GND terminal
5 RES Active low reset output
6 SAVE Save output
7 RES
8 VDD
Active high reset output
Positive supply voltage terminal
Functional Description
Table 6
Supply Lines
The circuit is powered through the VDD and VSS pins. It
monitors both its own VDD supply and a voltage applied to
the VIN input.
VDD Monitoring
During power-up the VIN monitoring is disabled and RES ,
RES and SAVE stay active low as long as VDD is below
VON (3.5 V). As soon as VDD reaches the VON level, the state
of the outputs depend on the watchdog timer and the
voltage at VIN relative to the thresholds (see Fig. 4). If the
supply voltage VDD falls back below VOFF (VON 0.3 V) the
watchdog timer and the VIN monitoring are disabled and the
outputs RES , RES and SAVE become active. The VDD
line should be free of voltage spikes.
VIN Monitoring
The analog voltage comparators compare the voltage
applied to VIN (typically connected to the input of the voltage
regulator) with the stabilized supply voltage VDD (version 14)
or with the bandgap voltage (versions 15, 16) (see Fig. 7).
At power-up, when VDD reached VON and VIN reaches the
VSH level, the SAVE output goes inactive, and the timer
starts running, setting RES and RES in active after the
time TTO (see. Fig. 4). If VIN falls below VSL , the SAVE
output goes active and stays active until VIN rises again
above VSH . If VIN falls below the voltage VRL , RES and
RES will become active and the on-chip timer will stop.
When VIN rises again above VSH, the timer will initiate a
power-up sequence. The RES and RES outputs may
however be influenced independently of the voltage VIN by
the timer action, see section Combined Voltage and Timer
Action”. Monitoring the rough DC side of the regulator, as
shown in Fig. 11, is the only way to have advanced warning
of power-down. Spikes on VIN should be filtered if they are
likely to exceed the value (VSL VRL).
The combination of VIN and VDD monitoring provide high
system security: if VIN rises much faster than VDD , then the
device starts the power-on sequence only when VDD
reached VON (Fig. 10). Short circuits on the regulated supply
voltage can be detected.
Voltage Thresholds on VIN
The H6060 is available with 3 different sets of thresholds:
Version 14: monitor the unregulated voltage and are ideal
for programming of the VIN voltage thresholds. Fixed
resistor values can be used for programming.
any voltage
Voltage
Regulator
5V
VIN VDD
RES
SAVE
VSS RES
Note: internal threshold levels: 2.25/2.00/1.75 V
at VDD = 5 V (thresholds relative to VDD, see
table 4 and fig. 4) RVIN =
~100 M
Fig. 8
Version 15, 16: monitor the regulated voltage. They are
suited to applications where the unregulated voltage is not
available. (The tolerance is 10%, see table 4. For tighter
tolerances, trimming can be used, see Fig. 9).
VIN VDD
RES
SAVE
VSS RES
Note: internal threshold levels: 2.00/1.95/1.90 V
(thresholds relative to internal
bandgap
reference) RVIN = ~100 M
Fig. 9
Monitoring of the unregulated voltage requires version 14.
These versions are based on the principle that VDD rises
with VIN on power-up a VDD holds up for a certain time after
VIN starts dropping on power-down. The versions 11 and 12
have a 100 knominal resistance from VIN to VSS (internal
voltage divider). The versions 14, 15 and 16 have high
impedance VIN inputs (see Fig. 7 and Table 4) for external
threshold voltage programming by a voltage divider on pin
VIN. The levels obtained are proportional to the internal
levels VSH, VSL and VRL on the chip itself (see Electrical
Specifications).
Copyright 2016, EM Microelectronic-Marin SA
6060-DS, Version 2.0, 3-Aug-16
5
www.emmicroelectronic.com
420005-A01, 3.0


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Part NumberDescriptionMFRS
H6060The function is Self Recovering Watchdog. EM Microelectronic - MARIN SAEM Microelectronic - MARIN SA

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