參數(shù)資料
型號(hào)： LTC695ISW-3.3
廠商： LINEAR TECHNOLOGY CORP
元件分類： 電源管理
英文描述： 3.3V Microprocessor Supervisory Circuits
中文描述： 3-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO16
封裝： 0.300 INCH, PLASTIC, SOP-16
文件頁(yè)數(shù)： 1/16頁(yè)
文件大?。?/td> 138K
代理商： LTC695ISW-3.3
1
LTC 694-3.3/LTC 695-3.3
3.3V Microprocessor
Supervisory C ircuits
1
μ
F
V
IN
≥
5V
3.3V
100
μ
F
0.1
μ
F
μ
P
POWER
POWER TO
CMOS RAM
μ
P
SYSTEM
0.1
μ
F
2.4V
51k
18k
694/5-3.3 TA01
MICROPROCESSOR RESET, BATTERY BACK-UP,
RAM WRITE PROTECTION, POWER WARNING AND
WATCHDOG TIMING ARE ALL IN A SINGLE CHIP
FOR 3.3V MICROPROCESSOR SYSTEM
LTC695-3.3
V
BATT
PFI
V
OUT
V
CC
GND
DECODER OUTPUT
RAM CS
μ
P RESET
μ
P NMI
I/O LINE
CE IN
CE OUT
RESET
PFO
WDI
0.1
μ
F
100
GND
V
IN
V
OUT
LT1129-3.3
OUT SENSE
SHDN
+
+
SUPPLY VOLTAGE (V)
0
R
3
4
5
4
2
1
0
1
2
3
5
694/5-3.3 TA02
RESET Output Voltage vs
Supply Voltage
I
UL Recognized File # E145770
I
GuaranteedReset Assertion at V
CC
= 1V
I
Pin Compatible with LTC694/LTC695
for 3.3V Systems
I
200
μ
A Typical Supply Current
I
Fast (30ns Typ) On-Board Gating of
RAM Chip Enable Signals
I
SO-8 and S16 Packages
I
2.90V Precision Voltage Monitor
I
Power OK/Reset Time Delay: 200ms or Adjustable
I
Minimum External Component Count
I
1
μ
A Maximum Standby Current
I
Voltage Monitor for Power-Fail or
Low-Battery Warning
I
Thermal Limiting
I
Performance Specified Over Temperature
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
protection, 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 3
μ
W maximum in battery back-up mode. Micropro-
cessor 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 time-out period.
, LTC and LT are registered trademarks of Linear Technology Corporation.
I
3.3V Low Power Systems
I
Critical
μ
P Power Monitoring
I
Intelligent Instruments
I
Battery-Powered Computers and Controllers
I
Automotive Systems
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
相關(guān)PDF資料
PDF描述
LTC695CN-3.3 3.3V Microprocessor Supervisory Circuits
LTC695I-3.3 3.3V Microprocessor Supervisory Circuits
LTC695IN-3.3 3.3V Microprocessor Supervisory Circuits
LTC695C-3.3 3.3V Microprocessor Supervisory Circuits
LTC695IN Microprocessor Supervisory Circuits
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