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Спецификация H6006 изготовлена «EM Microelectronic - MARIN SA» и имеет функцию, называемую «Failsafe Watchdog». |
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Детали детали
Номер произв | H6006 |
Описание | Failsafe Watchdog |
Производители | EM Microelectronic - MARIN SA |
логотип |
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Failsafe Watchdog
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 and supply voltage monitoring. The
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 VIN reached VSH and VDD raises above 3.5 V. If
VIN drops below VSL, the H6006 gives an advanced warning
signal for register saving and if the voltage drops further
below VRL, RES goes active. The H6006 functions at any
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
Features
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
VIN monitoring with 3 standard or programmable trigger
voltages for: power-on reset initialization, advanced
power-fail warning ( SAVE ), reset at power-down ( RES )
VDD monitoring: power-on reset initialization enabled
only if VDD ≥ 3.5 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
Applications
Microprocessor and microcontroller systems
Point of sales equipment
Telecom products
Automotive subsystems
Pin Assignment
Voltage
Regulator
VIN
TCL
VSS
5V
VDD
TO
SAVE
RES
INT
NMI
RES
Micro-
processor
I/O
GND
Fig. 1
SO8
VIN
TCL
RC
VSS
H6006
VDD
TO
SAVE
RES
Fig. 2
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H6006www.DataSheet4U.com
Absolute Maximum Ratings
Parameter
Symbol Conditions
Voltage VDD to VSS
Voltage at any pin to VSS
Voltage at any pin to VDD(except
VIN)
Voltage at VIN to VSS
Current at any output
Storage temperature
VDD
VMIN
VMAX
VINMAX
IMAX
TSTO
-0.3 to +8 V
-0.3
+0.3
+15 V
±10 mA
-65… +150 °C
Table 1
Stresses above these listed maximum ratings may cause
permanent damage to the device. Exposure beyond
specified operating conditions may affect device reliability or
cause malfunction.
Handling Procedures
This device has built-in protection against high static
voltages or electric fields; however, anti-static precautions
must be taken as for any other CMOS component.
Unless otherwise specified, proper operation can only occur
when all terminal voltages are kept within the supply voltage
range. Unused inputs must always be tied to a defined logic
voltage level.
Operating Conditions
Parameter
Symbol
Operating temperature
Industrial
Supply voltage
Comparator input
voltage
Version A2, A3,
B2,B3
Version B1
RC-oscillator
programming
(see Fig. 15)
External capacitance
External resistance
TAI
VDD
VIN
VIN
C1
R1
Min.
-40
1.5
0
0
10
Typ Max. Units
+85 °C
5.5 V
VDD
V
12 V
100 nF
kΩ
Table 2
Electrical Characteristics
VDD = 5.0 V, TA = -40 to +85 °C, unless otherwise specified
Parameter
Symbol Test Conditions
VDD activation threshold
VDD deactivation threshold
Supply current
Input VIN,, TCL
Leakage current
Input current on pin VIN
TCL input low level
TCL input high level
TO , RES . SAVE Outputs
VON
VOFF
IDD
IIP
IIN
VIL
VIH
TA = 25 °C
TA = 25 °C
RC open, TCL= 5 V, VIN = 0 V
VSS ≤ VIP ≤ VDD;
TA = 85 °C
Version B1; VIN = 10 V
Leakage current
IOLK Versions A2, A3;
VOUT = VDD
Drive currents (all versions)
IOL VOL = 0.4 V
IOL VDD = 3.5 V; VOL = 0.4 V
IOL VDD = 1.6 V; VOL = 0.4 V
Drive currents
(versions B1, B2, B3)1)
IOH VOH = 4.0 V
IOH VDD = 3.5 V; VOH ≥ 2.8 V
IOH VDD = 1.6 V; VOH = VDD-0.4
1)Versions: An = open drain outputs; Bn = push-pull outputs
Min.
3
Typ.
VON - 1.5
50
0.005
100
2.4
0 .05
3.2 8
2
80
3.2 8
2
80
VIN Surveillance
Voltage thresholds at TA = 25 °C
Version1) Comparator Reference
B1
A2, B2
A3, B3
VDD
VDD
Band-gap reference
Input Resistance
RVIN
100kΩ
~100MΩ
~100MΩ
1) Versions: An = open drain outputs; Bn = push-pull outputs
2) at VDD = 5 V
3) Threshold ratio as VSH/VSL or VSL/VRL
Thresholds
9.00 8.00 7.00 2)
2.25 2.00 1.75 2)
2.00 1.95 1.90
Threshold
Tolerance
± 5%
± 5%
± 10%
Max.
3.5
140
Units
V
V
µA
1 µA
180 µA
0.8 V
V
1 µA
mA
mA
µA
mA
mA
µA
Table 3
Ratio
Tolerance 3)
+2%
+2%
+2%
Table 4
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Timing Characteristics
VDD = 5.0 V, TA = −40 °C to +85 °C, unless otherwise specified
Parameter
Propagation delays
TCL to output pins
VIN to output pins
Logic transition times on all
output pins
Timeout period
TTCL input pulse width
Power-on reset debounce
Symbol Test Conditions
TDIDO
TAIDO
TTR
TTO
TTO
TTCL
TDB
Excluding debounce time TDB
Load 10 kΩ, 100 pF
RC open, unshielded , TA =25 °C
RC open, unshielded (not tested)
Timing Waveforms
Voltage Reaction: VDD Monitoring
H6006www.DataSheet4U.com
Min.
6
4.5
150
Typ.
250
4
30
10
TTO/32
Max.
500
10
100
16
20
Units
ns
µs
ns
ms
ms
ns
ms
Table 5
VDD
VON
VOFF
VIN monitoring enabled
Voltage Reaction: VIN Monitoring
VSH
VSL
VRL
VIN
0
TTO
TDB
TTO
TDB
SAVE
RES
Timer
Start
Power-on Timer
Reset
Stop
Timer
Start
Power-on
Reset
No Power-on
Reset
(as VIN > VRL)
Fig. 3
Conditions:
VDD > VON
No timeout
Fig. 4
Copyright © 2004, EM Microelectronic-Marin SA
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