EEWORLDEEWORLDEEWORLD

Part Number

Search

LTC694IS8-3.3#TR

Description
Supervisory Circuits LTC694-3.3 - 3.3V Microprocessor Supervisory Circuits
CategoryPower/power management    The power supply circuit   
File Size186KB,20 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric View All

LTC694IS8-3.3#TR Overview

Supervisory Circuits LTC694-3.3 - 3.3V Microprocessor Supervisory Circuits

LTC694IS8-3.3#TR Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerADI
package instructionSOP,
Reach Compliance Codenot_compliant
ECCN codeEAR99
Other featuresRESET THRESHOLD VOLTAGE IS 2.9 V
Adjustable thresholdNO
Analog Integrated Circuits - Other TypesPOWER SUPPLY MANAGEMENT CIRCUIT
JESD-30 codeR-PDSO-G8
JESD-609 codee0
length4.903 mm
Humidity sensitivity level1
Number of channels1
Number of functions1
Number of terminals8
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)255
Certification statusNot Qualified
Maximum seat height1.752 mm
Maximum supply voltage (Vsup)5.5 V
Minimum supply voltage (Vsup)3 V
Nominal supply voltage (Vsup)3.3 V
surface mountYES
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature40
width3.899 mm
LTC694-3.3/LTC695-3.3
3.3V Microprocessor
Supervisory Circuits
FEATURES
n
n
n
n
n
n
n
n
n
n
n
n
DESCRIPTION
The LTC
®
694-3.3/LTC695-3.3 provide complete 3.3V power
supply monitoring and battery control functions. These
include power-on reset, battery back-up, RAM write pro-
tection, power failure warning and watchdog timing. The
devices are pin compatible upgrades of the LTC694/LTC695
that are optimized for 3.3V systems. Operating power
consumption has been reduced to 0.6mW (typical) and
3μW maximum in battery back-up mode. Microprocessor
reset and memory write protection are provided when the
supply falls below 2.9V. The
RESET
output is guaranteed
to remain logic low with V
CC
as low as 1V.
The LTC694-3.3/LTC695-3.3 power the active RAMs with
a charge pumped NMOS power switch to achieve low
dropout 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
LTC694-3.3/LTC695-3.3 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.
Guaranteed Reset Assertion at V
CC
= 1V
Pin Compatible with LTC694/LTC695 for 3.3V Systems
200μA Typical Supply Current
Fast (30ns Typ) Onboard Gating of
RAM Chip Enable Signals
SO-8 and S16 Packages
2.90V 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
APPLICATIONS
n
n
n
n
n
3.3V Low Power Systems
Critical μP Power Monitoring
Intelligent Instruments
Battery-Powered Computers and Controllers
Automotive Systems
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.
TYPICAL APPLICATION
V
IN
≥ 5V
RESET
Output Voltage
vs Supply Voltage
V
CC
0.1μF
V
OUT
LTC695-3.3
V
BATT
2.4V
CE
IN
CE
OUT
RESET
PFO
WDI
GND
POWER TO
μP
CMOS RAM POWER
0.1μF
μP
SYSTEM
DECODER OUTPUT
RAM
CS
μP
RESET
μP NMI
I/O LINE
100Ω
0.1μF
694/5-3.3 TA01
+
1μF
LT1129-3.3
V
IN
V
OUT
OUT SENSE
SHDN
GND
3.3V
5
+
100μF
RESET
OUTPUT VOLTAGE (V)
4
3
51k
PFI
18k
MICROPROCESSOR RESET, BATTERY BACK-UP,
RAM WRITE PROTECTION, POWER WARNING AND
WATCHDOG TIMING ARE ALL IN A SINGLE CHIP
FOR 3.3V MICROPROCESSOR SYSTEM
2
1
0
0
1
3
4
2
SUPPLY VOLTAGE (V)
5
694/5-3.3 TA02
69453fb
1
About the problem of converting simulink into c code
What are the requirements for converting a model composed of simulink block diagrams into C code? For example, it cannot contain custom modules written in .m files! Please help to add some information...
yanglutian Embedded System
[Share] I saw several good videos on the Feiling Embedded website, which are very helpful for getting started with embedded systems
This article is quoted from the Feiling embedded ARM9 S3C2440 development board exchange area www.witech.com.cn 1. New to embedded systems? Don't worry, spend 18 minutes with our engineers to unveil t...
yanhong_90 Embedded System
Methods of writing a report on a competition
[i=s]This post was last edited by paulhyde on 2014-9-15 09:44[/i] Methods for writing a report for the competition:...
青春 Electronics Design Contest
Questions about TMS320f28027F SVPWM
SVPWM is generally generated using 7-segment or 5-segment methods, and the location of the synthetic magnetic field needs to be considered. Recently, I was studying TI's C2000-launchpadTMS320f28027F p...
fish001 Microcontroller MCU
Policy Analysis IPTV
[i=s]This post was last edited by jameswangsynnex on 2015-3-3 19:57[/i]Policies will no longer be a hindrance to the development of the IPTV industry 2006-7-18Zheng Qibao, executive vice president of ...
hkn Mobile and portable
Call academic, bjmonsoon, fengzhang2002 about the DHCP IP acquisition method of enet_lwip
I still don't understand how to use a PC to connect directly to the 8963 development board through a network cable to automatically obtain an IP through DHCP and access it through the IE browser on th...
历史的天空 Microcontroller MCU

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 2121  1173  2514  743  1249  43  24  51  15  26 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号