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LTC693CSW#TR

Description
IC supervisory circ mpu 16soic
CategoryPower/power management    The power supply circuit   
File Size250KB,20 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet Parametric View All

LTC693CSW#TR Overview

IC supervisory circ mpu 16soic

LTC693CSW#TR Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?incompatible
MakerLinear ( ADI )
Parts packaging codeSOIC
package instructionSOP,
Contacts16
Manufacturer packaging codeSW
Reach Compliance Code_compli
ECCN codeEAR99
Adjustable thresholdNO
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
JESD-30 codeR-PDSO-G16
JESD-609 codee0
length10.3 mm
Humidity sensitivity level1
Number of channels1
Number of functions1
Number of terminals16
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)235
Certification statusNot Qualified
Maximum seat height2.65 mm
surface mountYES
technologyCMOS
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature20
width7.5 mm
LTC692/LTC693
Microprocessor
Supervisory Circuits
FEATURES
n
n
n
n
n
n
n
n
n
n
n
n
DESCRIPTION
The LTC
®
692/LTC693 provide complete power supply
monitoring and battery control functions for microproces-
sor reset, battery backup, CMOS RAM write protection,
power failure warning and watchdog timing. A precise
internal voltage reference and comparator circuit monitor
the power supply line. When an out-of-tolerance condition
occurs, the reset outputs are forced to active states and the
chip enable output unconditionally write-protects external
memory. In addition, the
RESET
output is guaranteed to
remain logic low even with V
CC
as low as 1V.
The LTC692/LTC693 power the active CMOS RAMs with a
charge-pumped NMOS power switch to achieve low drop-
out and low supply current. When primary power is lost,
auxiliary power, connected to the battery input pin, powers
the RAMs in standby through an efficient PMOS switch.
For an early warning of impending power failure, the
LTC692/LTC693 provide an internal comparator with a
user-defined threshold. An internal watchdog timer is
also available, which forces the reset pins to active states
when the watchdog input is not toggled prior to a preset
timeout period.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners..
Guaranteed
Reset Assertion at V
CC
= 1V
1.5mA Maximum Supply Current
Fast (35ns Maximum) Onboard Gating of RAM Chip
Enable Signals
4.40V Precision Voltage Monitor
Power OK/Reset Time Delay: 200ms or Adjustable
Minimum External Component Count
1μA Maximum Standby Current
Voltage Monitor for Power-Fail or Low Battery
Warning
Thermal Limiting
Performance Specified Over Temperature
Superior Upgrade for MAX690 Family
SO8 and SO16 Packaging
APPLICATIONS
n
n
n
n
Critical μP Power Monitoring
Intelligent Instruments
Battery-Powered Computers and Controllers
Automotive Systems
TYPICAL APPLICATION
5
V
IN
≥ 7.5V
LT1086-5
V
IN
ADJ
V
OUT
5V
RESET
Output Voltage vs
Supply Voltage
T
A
= 25°C
EXTERNAL PULL-UP = 10μA
V
BATT
= 0V
+
10μF
+
100μF
V
CC
0.1μF
LTC692
LTC693
V
BATT
3V
V
OUT
0.1μF
POWER TO
μP
CMOS RAM POWER
μP
SYSTEM
μP
RESET
μP NMI
I/O LINE
692_3 • TA01
RESET
OUTPUT VOLTAGE (V)
4
3
51k
PFI
10k
MICROPROCESSOR RESET, BATTERY BACKUP, POWER FAILURE
WARNING AND WATCHDOG TIMING ARE ALL IN A SINGLE CHIP
FOR MICROPROCESSOR SYSTEMS
GND
RESET
PFO
WDI
0.1μF
2
1
100Ω
0
0
1
3
4
2
SUPPLY VOLTAGE (V)
692_3 • TA02
5
0692fb
1
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