DataSheet26.com

LTC695 PDF даташит

Спецификация LTC695 изготовлена ​​​​«Linear Technology» и имеет функцию, называемую «Microprocessor Supervisory Circuits».

Детали детали

Номер произв LTC695
Описание Microprocessor Supervisory Circuits
Производители Linear Technology
логотип Linear Technology логотип 

20 Pages
scroll

No Preview Available !

LTC695 Даташит, Описание, Даташиты
Features
n Guaranteed Reset Assertion at VCC = 1V
n 1.5mA Maximum Supply Current
n Fast (35ns Max) Onboard Gating of RAM Chip
Enable Signals
n SO-8 and S16 Packaging
n 4.65V Precision Voltage Monitor
n Power OK/Reset Time Delay: 50ms, 200ms
or Adjustable
n Minimum External Component Count
n 1µA Maximum Standby Current
n Voltage Monitor for Power-Fail
or Low Battery Warning
n Thermal Limiting
n Performance Specified Over Temperature
n Superior Upgrade for MAX690 Family
Applications
n Critical µP Power Monitoring
n Intelligent Instruments
n Battery-Powered Computers and Controllers
n Automotive Systems
LTC690/LTC691
LTC694/LTC695
Microprocessor
Supervisory Circuits
Description
The LTC®690 family, LTC690/LTC691/LTC694/LTC695,
provides complete power supply monitoring and battery
control functions for microprocessor reset, battery back-
up, 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 VCC as low as 1V.
The LTC690 family powers 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 LTC690
family provides 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.
Typical Application
VIN ≥ 7.5V
+
10µF
LT®1086-5
VIN VOUT
ADJ
5V
+
100µF
51k
10k
0.1µF
3V
VCC VOUT
LTC690/LTC691
LTC694/LTC695
VBATT
RESET
PFO
PFI GND WDI
MICROPROCESSOR RESET, BATTERY BACK-UP, POWER FAILURE
WARNING AND WATCHDOG TIMING ARE ALL IN A SINGLE CHIP
FOR MICROPROCESSOR SYSTEMS
0.1µF
POWER TO µP
CMOS RAM POWER
µP
SYSTEM
µP RESET
µP NMI
I/O LINE
0.1µF 100Ω
690 TA01
For more information www.linear.com/690
RESET Output Voltage
vs Supply Voltage
5
TA = 25°C
EXTERNAL PULL-UP = 10µA
4 VBATT = 0V
3
2
1
0
01 2 345
SUPPLY VOLTAGE (V)
690 TA02
690ff
1









No Preview Available !

LTC695 Даташит, Описание, Даташиты
LTC690/LTC691
LTC694/LTC695
Absolute Maximum Ratings
(Notes 1 and 2)
Terminal Voltage
VCC...................................................... – 0.3V to 6.0V
VBATT................................................... –0.3V to 6.0V
All Other Inputs.....................– 0.3V to (VOUT + 0.3V)
Input Current
VCC.................................................................200mA
VBATT................................................................50mA
GND..................................................................20mA
VOUT Output Current....................Short-Circuit Protected
Power Dissipation................................................500mW
Operating Temperature Range
LTC690/91/94/95C ................................. 0°C to 70°C
LTC690/91/94/95I ..............................– 40°C to 85°C
Storage Temperature Range ................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec.).................. 300°C
Pin Configuration
VBATT
VOUT
VCC
1
2
3
GND 4
BATT ON 5
LOWLINE 6
OSC IN 7
OSC SEL 8
TOP VIEW
16 RESET
15 RESET
14 WDO
13 CE IN
12 CE OUT
11 WDI
10 PFO
9 PFI
N PACKAGE
16-LEAD PDIP
TJMAX = 110°C, θJA = 130°C/W
VOUT 1
VCC 2
GND 3
PFI 4
TOP VIEW
8 VBATT
7 RESET
6 WDI
5 PFO
J8 PACKAGE N8 PACKAGE
8-LEAD CERDIP 8-LEAD PDIP
TJMAX = 110°C, θJA = 130°C/W (N8)
TOP VIEW
VBATT
VOUT
VCC
GND
1
2
3
4
BATT ON 5
LOWLINE 6
OSC IN 7
OSC SEL 8
16 RESET
15 RESET
14 WDO
13 CE IN
12 CE OUT
11 WDI
10 PFO
9 PFI
SW PACKAGE
16-LEAD WIDE PLASTIC SO
TJMAX = 110°C, θJA = 130°C/W CONDITIONS: PCB MOUNT ON
FR4 MATERIAL, STILL AIR AT 25°C, COPPER TRACE
TOP VIEW
VOUT
VCC
GND
1
2
3
PFI 4
8 VBATT
7 RESET
6 WDI
5 PFO
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 110°C, θJA = 180°C/W CONDITIONS; PCB MOUNT ON
FR4 MATERIAL, STILL AIR AT 25°C, COPPER TRACE
2 For more information www.linear.com/690
690ff









No Preview Available !

LTC695 Даташит, Описание, Даташиты
LTC690/LTC691
LTC694/LTC695
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC691CN#PBF
LTC691CN#PBF
LTC691CN
16-Lead PDIP
0°C to 70°C
LTC691IN#PBF
LTC691IN#PBF
LTC691IN
16-Lead PDIP
–40°C to 85°C
LTC695CN#PBF
LTC695CN#PBF
LTC695CN
16-Lead PDIP
0°C to 70°C
LTC695IN#PBF
LTC695IN#PBF
LTC695IN
16-Lead PDIP
–40°C to 85°C
LTC691CSW#PBF
LTC691CSW#PBF
LTC691CSW
16-Lead Wide Plastic SO
0°C to 70°C
LTC691ISW#PBF
LTC691ISW#PBF
LTC691ISW
16-Lead Wide Plastic SO
–40°C to 85°C
LTC695CSW#PBF
LTC695CSW#PBF
LTC695CSW
16-Lead Wide Plastic SO
0°C to 70°C
LTC695ISW#PBF
LTC695ISW#PBF
LTC695ISW
16-Lead Wide Plastic SO
–40°C to 85°C
LTC690CN8#PBF
LTC690CN8#PBF
LTC690CN8
8-Lead PDIP
0°C to 70°C
LTC690IN8#PBF
LTC690IN8#PBF
LTC690IN8
8-Lead PDIP
–40°C to 85°C
LTC694CN8#PBF
LTC694CN8#PBF
LTC694CN8
8-Lead PDIP
0°C to 70°C
LTC694IN8#PBF
LTC694IN8#PBF
LTC694IN8
8-Lead PDIP
–40°C to 85°C
LTC690CS8#PBF
LTC690CS8#PBF
690
8-Lead Plastic SO
0°C to 70°C
LTC690IS8#PBF
LTC690IS8#PBF
690
8-Lead Plastic SO
–40°C to 85°C
LTC694CS8#PBF
LTC694CS8#PBF
694
8-Lead Plastic SO
0°C to 70°C
LTC694IS8#PBF
LTC694IS8#PBF
694
8-Lead Plastic SO
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
Product Selection Guide
LTC690
LTC691
LTC694
LTC695
LTC699
LTC1232
LTC1235
WATCHDOG
PINS
RESET
TIMER
8XX
16 X
X
8XX
16 X
X
8XX
8XX
16 X
X
BATTERY
BACK-UP
X
X
X
X
POWER-FAIL
WARNING
X
X
X
X
RAM WRITE
PROTECT
CONDITIONAL
PUSHBUTTON BATTERY
RESET
BACK-UP
X
X
X
XXXX X
For more information www.linear.com/690
690ff
3










Скачать PDF:

[ LTC695.PDF Даташит ]

Номер в каталогеОписаниеПроизводители
LTC690Microprocessor Supervisory CircuitsLinear Technology
Linear Technology
LTC69001kHz to 20MHz Resistor Set SOT-23 OscillatorLinear Technology
Linear Technology
LTC6902Multiphase OscillatorLinear Technology
Linear Technology
LTC6903(LTC6903 / LTC6904) 1kHz - 68MHz Serial Port Programmable OscillatorLinear Technology
Linear Technology

Номер в каталоге Описание Производители
TL431

100 мА, регулируемый прецизионный шунтирующий регулятор

Unisonic Technologies
Unisonic Technologies
IRF840

8 А, 500 В, N-канальный МОП-транзистор

Vishay
Vishay
LM317

Линейный стабилизатор напряжения, 1,5 А

STMicroelectronics
STMicroelectronics

DataSheet26.com    |    2020    |

  Контакты    |    Поиск