zxcm209 Zetex Semiconductors plc., zxcm209 Datasheet

no-image

zxcm209

Manufacturer Part Number
zxcm209
Description
Very Low Power Microprocessor Reset Devices
Manufacturer
Zetex Semiconductors plc.
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
zxcm209JFTA
Manufacturer:
ZETEX
Quantity:
20 000
Part Number:
zxcm209LFTA
Manufacturer:
ZETEX
Quantity:
20 000
Part Number:
zxcm209MFTA
Manufacturer:
ZETEX
Quantity:
20 000
Part Number:
zxcm209RFTA
Manufacturer:
ZETEX
Quantity:
20 000
Part Number:
zxcm209SF
Manufacturer:
ZETEX
Quantity:
20 000
ISSUE 3 - FEBRUARY 2001
VERY LOW POWER MICROPROCESSOR RESET DEVICES
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 in the correct state for supplies down
to 1V), while the ZXCM210 has an active-high RESET
output.
The reset comparator has in built hysteresis 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
1
APPLICATION CIRCUIT
APPLICATIONS
v
cc
Computer systems
Controllers
Instrumentation
Microprocessor power monitoring
Microcontroller power monitoring
Power supplies
Portable/Battery-powered equipment
Automotive
ZXCM
Gnd
v
cc
Output
Reset
ZXCM209
ZXCM210
Reset
Input
Micro
Gnd
v
cc

Related parts for zxcm209

zxcm209 Summary of contents

Page 1

... The ZXCM209 has an active-low RESET output (which is guaranteed the correct state for supplies down to 1V), while the ZXCM210 has an active-high RESET output ...

Page 2

... ZXCM209 ZXCM210 ABSOLUTE MAXIMUM RATINGS Terminal Voltage with respect RESET, RESET Input Current Output Current Rate of Rise Continuous Power Dissipation Operating Temperature Range Storage Temperature Range Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. ...

Page 3

... ELECTRICAL CHARACTERISTICS ZXCM209 TEST CONDITIONS (unless otherwise stated) V SYMBOL PARAMETER V Reset Output Voltage OL Low V Reset Output Voltage OH High ELECTRICAL CHARACTERISTICS ZXCM210 TEST CONDITIONS (unless otherwise stated) V SYMBOL PARAMETER V Reset Output Voltage OL Low V Reset Output Voltage OH High Note: Device testing is performed at T TYPICAL CHARACTERISTICS ...

Page 4

... ZXCM209 ZXCM210 TYPICAL CHARACTERISTICS ISSUE 3 - FEBUARY 2001 4 ...

Page 5

... APPLICATIONS INFORMATION Negative going V transients CC The ZXCM209/210 are good degree, immune to short duration negative going supply transients. Under certain circumstances very brief transients are allowed without inappropriate false triggering of the reset circuit. The response to supply transients is shown in the Noise Immunity graph in the typical characteristics. The ...

Page 6

... Pin Name Pin Function Number 1 V Supply voltage (+5, +3.3, +3 volts RESET Output remains low while Vcc is below the reset threshold, and for a minimum 140ms after V (ZXCM209) Output remains high while V RESET minimum 140ms after V (ZXCM210) 3 Gnd Ground operation of the reset circuit. A buffer to other circuit components is then required to enable the processor reset drive to operate correctly ...

Page 7

... ORDERING INFORMATION PART NUMBER TEMPERATURE RANGE ZXCM209xF -55 to 125°C ZXCM210LF -55 to 125°C x=Insert appropriate threshold voltage code. ZXCM209 Threshold voltage codes PART MARK THRESHOLD CODE M22 L M23 M M24 J M25 T M26 S M27 R ZXCM210 Threshold voltage codes PART MARK THRESHOLD CODE ...

Page 8

... ZXCM209 ZXCM210 PACKAGE DIMENSIONS DIM Millimetres Inches Min Max Min A 2.67 3.05 0.105 B 1.20 1.40 0.047 C – 1.10 – D 0.37 0.53 0.0145 F 0.085 0.15 0.0033 G NOM 1.9 NOM 0.075 K 0.01 0.10 0.0004 L 2.10 2.50 0.0825 N 0.95 NOM NOM Zetex plc. Fields New Road, Chadderton, Oldham, OL9-8NP, United Kingdom. Telephone: (44)161 622 4422 (Sales), (44)161 622 4444 (General Enquiries) ...

Related keywords