LX7001 Datasheet, PDF (1/9 Pages) Microsemi Corporation – TRANSIENT IMMUNE UNDERVOLTAGE SENSING CIRCUIT

T H E I N F I N I T E P O W E R O F I N N O VAT I O N
LX7001
TRANSIENT IMMUNE UNDERVOLTAGE SENSING CIRCUIT
PRODUCTION DATA SHEET
DESCRIPTION
The LX7001 is an improved
undervoltage sensing circuit specifi-
cally designed for use as a reset
controller in microprocessor-based
systems. Today's complex miniaturized
systems present difficult challanges to
the system designer such as overcom-
ing spurious noise problems. The
LX7001 is optimized for systems that
must be tolerant of high-speed power
supply glitches caused by high-speed
logic transitions and similar switching
phenomena. The LX7001 offers a
unique stage that couples glitch
immunity with a micropower, ultra-
stable band-gap reference for preci-
sion sensing of undervoltage condi-
tions. It offers the designer an
economical, space-efficient solution
for low supply voltage detection
when used in combination with a
single pull-up resistor. Adding one
capacitor offers the functionality of a
programmable delay time after power
returns. Additionally, the LX7001
offers excellent temperature stability.
A high-quality trimmed voltage
reference and bias circuit permit very
accurate and repeatable undervoltage
sensing. The remaining blocks
consist of a comparator with hyster-
esis, high current clamping diode and
open collector output stage capable
of sinking up to 60mA. The
LX7001's RESET output is specified to
be fully functional at V =1V.
IN
NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com.
PRODUCT HIGHLIGHT
INPUT TRANSIENT IMMUNITY
100
K E Y F E AT U R E S
s Fully Characterized, Transient Immune
Input Stage
(See Product Highlight)
s Monitors 5V Supplies (V_TRIP=4.6V Typ.)
s Outputs Fully Defined At V =1V
CC
s Ultra-Low Supply Current
(500µA Max. Over Temp)
! Temperature Compensated I For Extremely
CC
Stable Current Consumption
! µP Reset Function Programmable With 1
External Resistor And Capacitor
! Comparator Hysteresis Prevents Output
Oscillation
! Electrically Compatible With Motorola
MC34064
! Pin-to-Pin Compatible With Motorola
MC34064/MC34164
A P P L I C AT I O N S
s All Microprocessor Or Microcontroller
Designs Using 5V Supplies
s Simple 5V Undervoltage Detection
ACTIVE
10
IMMUNE
1
0.1
100
1000
(e_n) Noise Pulse Amplitude - (mV)
PA C K A G E O R D E R I N F O R M AT I O N
T_A (°C)
DM
Plastic
8-pin
SOIC
LP
Plastic
3-pin
TO-92
Y
Ceramic Dip
8-pin
0 to 70
LX7001CDM
LX7001CLP
—
-40 to 85
LX7001IDM
LX7001ILP
—
-55 to 125
—
—
LX7001MY
Note: All surface-mount packages are available in Tape & Reel.
Append the letter "T" to part number. (i.e. LX7001CDMT)
LINFINITY MICROELECTRONICS INC.
Copyright © 1999
Rev. 1.2 6/99
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: [phone]
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