Zetex ZXCM209JF, ZXCM209LF, ZXCM209MF, ZXCM209RF, ZXCM209SF Datasheet
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ISSUE 3 - FEBRUARY 2001
ZXCM209
ZXCM210
DESCRIPTION
The ZXCM209/210 are three terminal supervisory
circuits used to monitor the power supplies in
microprocessor and digital systems. They provide a
high performance economical solution when used
with 5V, 3V or lower powered circuits. Reset
thresholds suitable for operation with a variety of
supply voltages are available.
These devices provide a reset signal whenever the
supply voltage falls below a preset threshold, keeping
it asserted for a minimum delay period of 140ms after
the supply has risen above the reset level. The
ZXCM209 has an active-low RESET output (which is
guaranteed to be inthe correct state for suppliesdown
to 1V), while the ZXCM210 has an active-high RESET
output.
The reset comparator hasinbuilthysteresis to prevent
erratic operation and is designed to ignore supply
transients. Low supply current (typically 2µA) makes
the ZXCM209/210 devices ideal for use in portable
equipment. They are available in a 3-pin SOT23
surface mount package with an industry standard
pinout.
FEATURES
•
Enhanced alternative to MAX809/810 and similar
parts
•
Precision monitoring of 5V, 3.3V, 3V power
supply voltages
•
1% threshold tolerance
•
2µA typical supply current
•
140ms minimum power on reset pulse width
•
Alternative minimum pulse widths available,
contact your local sales office for availability
•
RESET LOW Output (ZXCM209)
•
RESET HIGH Output (ZXCM210)
•
Power supply transient immunity
•
No latch up
•
No external components
•
3-Pin SOT23 package
APPLICATIONS
•
Computer systems
•
Controllers
•
Instrumentation
•
Microprocessor power monitoring
•
Microcontroller power monitoring
•
Power supplies
•
Portable/Battery-powered equipment
•
Automotive
VERY LOW POWER MICROPROCESSOR RESET DEVICES
APPLICATION CIRCUIT
v
cc
ZXCM
Reset
Output
Gnd
v
cc
v
cc
Micro
Reset
Input
Gnd
1
ZXCM209
ZXCM210
ABSOLUTE MAXIMUM RATINGS
Terminal Voltage with respect to G
ND
V
CC
-0.3V to 7.0V
RESET, RESET
-0.3V to (VCC+ 0.3V)
Input Current, V
CC
20mA
Output Current 20mA
Rate of Rise, V
CC
250V/µs
Continuous Power Dissipation 500mW
Operating Temperature Range -55°C to +125°C
Storage Temperature Range -65°C to +150°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
These are stress ratings only, and functional operation of the device at these or any other conditions beyond
those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum
conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS (unless otherwise stated) V
CC
= full range, TA= -55°C to +125°C
SYMBOL PARAMETER CONDITIONS LIMITS UNITS
MIN TYP MAX
V
R
VCCRange TA=0° to 70°C
T
A
=-55° to 125°C
1.0
1.2
5.5
5.5
V
V
I
CC
Supply Current 2 5
µA
V
TH
Reset Threshold Suffix L; TA=25°C 4.58 4.63 4.68 V
Suffix M; T
A
=25°C 4.34 4.38 4.42 V
Suffix J; T
A
=25°C 3.96 4.00 4.04 V
Suffix T; T
A
=25°C 3.05 3.08 3.11 V
Suffix S; T
A
=25°C 2.90 2.93 2.96 V
Suffix R; T
A
=25°C 2.60 2.63 2.66 V
V
THT
Reset Threshold
Tolerance
TA=25°C
T
A
=-55° to 125°C
1
5
%
%
∆V
TH
/°C
Reset Threshold Temp.
Coefficient
50 ppm/°C
V
D
VCCto Reset Delay 30
µs
V
TO
Reset Active Timeout
Period
140 560 ms
22
ISSUE 3 - FEBUARY 2001
ISSUE 3 - FEBRUARY 2001
ZXCM209
ZXCM210
ELECTRICAL CHARACTERISTICS ZXCM209
TEST CONDITIONS (unless otherwise stated) V
CC
= full range, TA= -55°C to +125°C
SYMBOL PARAMETER CONDITIONS LIMITS UNITS
MIN TYP MAX
V
OL
Reset Output Voltage
Low
V
CC
>1V, IOL=100µA (0 to 85°C)
0.3 V
V
CC
>1.2V, IOL=200µA
0.3 V
V
TH>VCC
>2.5V, IOL=2.7mA
0.4 V
V
OH
Reset Output Voltage
High
V
CC>VTH
max, IOH=1mA
0.8V
cc
V
ELECTRICAL CHARACTERISTICS ZXCM210
TEST CONDITIONS (unless otherwise stated) V
CC
= full range, TA= -55°C to +125°C
SYMBOL PARAMETER CONDITIONS LIMITS UNITS
MIN TYP MAX
V
OL
Reset Output Voltage
Low
V
CC>VTH
max, IOL=2mA
0.3 V
V
CC>VTH
max, IOL=2.7mA
0.4 V
V
OH
Reset Output Voltage
High
V
CC
>1.5V, IOH=150µA
0.8V
cc
V
V
CC>VTH
>2.5V, IOH=1mA
0.8V
cc
V
Note: Device testing is performed at TA=25°C. Device thermal performance is guaranteed by design
TYPICAL CHARACTERISTICS
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