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参数资料
| 型号： | LTC694CN8-3.3#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDIP8 |
| 封装： | 0.300 INCH, LEAD FREE, PLASTIC, DIP-8 |
| 文件页数： | 1/20页 |
| 文件大小： | 189K |
| 代理商： | LTC694CN8-3.3#TRPBF |
LTC694-3.3/LTC695-3.3
1
69453fb
TYPICAL APPLICATION
FEATURES
DESCRIPTION
3.3V Microprocessor
Supervisory Circuits
The LTC694-3.3/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 VCC 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.
RESET Output Voltage
vs Supply Voltage
APPLICATIONS
n Guaranteed Reset Assertion at VCC = 1V
n Pin Compatible with LTC694/LTC695 for 3.3V Systems
n 200μA Typical Supply Current
n Fast (30ns Typ) Onboard Gating of
RAM Chip Enable Signals
n SO-8 and S16 Packages
n 2.90V Precision Voltage Monitor
n Power OK/Reset Time Delay: 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 3.3V Low Power Systems
n Critical μP Power Monitoring
n Intelligent Instruments
n Battery-Powered Computers and Controllers
n 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.
1μF
VIN ≥ 5V
3.3V
100μF
0.1μF
μP
POWER
POWER TO
CMOS RAM
μP
SYSTEM
0.1μF
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
VBATT
PFI
VOUT
VCC
GND
DECODER OUTPUT
RAM CS
μP RESET
μP NMI
I/O LINE
CE IN
CE OUT
RESET
PFO
WDI
0.1μF
100Ω
GND
VIN
VOUT
LT1129-3.3
OUT SENSE
SHDN
+
SUPPLY VOLTAGE (V)
0
RESET
OUTPUT
VOLTAGE
(V)
3
4
5
4
2
1
0
1
2
3
5
694/5-3.3 TA02
相关PDF资料 |
PDF描述 |
|---|---|
| LTC695CN-3.3#TRPBF | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDIP16 |
| LTC695IS | 4-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO16 |
| LTC691IS | 4-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO16 |
| LTC691CS | 4-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO16 |
| LTC6992HDCB-2#TRPBF | 0.02 A SWITCHING CONTROLLER, PDSO6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC694CN8PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Microprocessor Supervisory Circuits |
| LTC694CN8-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Microprocessor Supervisory Circuits |
| LTC694CS-3.3 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Power Supply Supervisor |
| LTC694CS8 | 功能描述:IC MPU SUPERVISORY CIRCUIT 8SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 标准包装:1 系列:- 类型:简单复位/加电复位 监视电压数目:1 输出:开路漏极或开路集电极 复位:高有效 复位超时:- 电压 - 阀值:1.8V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-TSOP（0.059"，1.50mm 宽）5 引线 供应商设备封装:5-TSOP 包装:剪切带 (CT) 其它名称:NCP301HSN18T1GOSCT |
| LTC694CS8#PBF | 功能描述:IC MPU SUPERVISORY CIRCUIT 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 其它有关文件:STM6905 View All Specifications 标准包装:1 系列:- 类型:多压监控器 监视电压数目:5 输出:开路漏极或开路集电极 复位:低有效 复位超时:最小为 140 ms 电压 - 阀值:2.188V，2.955V，可调，可调，可调 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-TSSOP 包装:Digi-Reel® 产品目录页面:1197 (CN2011-ZH PDF) 其它名称:497-8728-6 |
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