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| 型号： | FM4005-G |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO14 |
| 封装： | GREEN, MS-012AB, SOIC-14 |
| 文件页数： | 1/23页 |
| 文件大小： | 244K |
| 代理商： | FM4005-G |
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Pre-Production
This is a product in pre-production phase of development. Device
Ramtron International Corporation
characterization is complete and Ramtron does not expect to change
1850 Ramtron Drive, Colorado Springs, CO 80921
the specifications. Ramtron will issue a Product Change Notice if
(800) 545-FRAM, (719) 481-7000
any specification changes are made.
www.ramtron.com
Rev. 2.4
Jan. 2010
Page 1 of 23
FM4005
Integrated Processor Companion
Features
High Integration Device Replaces Multiple Parts
Real-time Clock (RTC)
Low Voltage Reset
Watchdog Timer
Early Power-Fail Warning/NMI
Two 16-bit Event Counters
Serial Number with Write-lock for Security
Real-Time Clock/Calendar
Backup Current under 1
A
Seconds through Centuries in BCD format
Tracks Leap Years through 2099
Uses Standard 32.768 kHz Crystal (6pF)
Software Calibration
Calibration Data is Nonvolatile
Programmed Settings are Nonvolatile
Supports Battery or Capacitor Backup
Processor Companion
Active-low Reset Output for VDD and Watchdog
Programmable Low VDD Reset Thresholds
Manual Reset Filtered and Debounced
Programmable Watchdog Timer
Dual Battery-backed Event Counter Tracks System
Intrusions or other Events
Comparator for Early Power-Fail Interrupt
64-bit Programmable Serial Number with Lock
Fast Two-wire Serial Interface
Up to 1 MHz Maximum Bus Frequency
Supports Legacy Timing for 100 kHz & 400 kHz
Easy to Use Configurations
Operates from 2.7 to 5.5V
Small Footprint 14-pin “Green” SOIC (-G)
Low Operating Current
-40
°C to +85°C Operation
Description
The FM4005 is an integrated device that includes the
most commonly needed functions for processor-
based systems. Major features include real-time
clock, low-VDD reset, watchdog timer, battery-backed
event counter, lockable 64-bit serial number area, and
general purpose comparator that can be used for a
power-fail (NMI) interrupt or other purpose. The
family operates from 2.7 to 5.5V.
The real-time clock (RTC) provides time and date
information in BCD format. It can be permanently
powered from external backup voltage source, either
a battery or a capacitor. The timekeeper uses a
common external 32.768 kHz crystal and provides a
calibration mode that allows software adjustment of
timekeeping accuracy.
The processor companion includes commonly needed
CPU
support
functions.
Supervisory
functions
include a reset output signal controlled by either a
low VDD condition or a watchdog timeout. /RST
goes active when VDD drops below a programmable
threshold and remains active for 100 ms after VDD
rises above the trip point. A programmable watchdog
timer runs from 100 ms to 3 seconds. The watchdog
timer is optional, but if enabled it will assert the reset
signal for 100 ms if not restarted by the host before
the timeout. A flag-bit indicates the source of the
reset.
A general-purpose comparator compares an external
input pin to the onboard 1.2V reference. This is
useful for generating a power-fail interrupt (NMI) but
can be used for any purpose. The device also includes
a programmable 64-bit serial number that can be
locked making it unalterable. Additionally it offers a
dual battery-backed event counter that tracks the
number of rising or falling edges detected on
dedicated input pins.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| FM4005-GTR | 功能描述:F-RAM RTC RTC Alarm Pwr Mon WDT Bat Sw RoHS:否 存储容量:512 Kbit 组织:64 K x 8 接口:SPI 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube 制造商:Cypress Semiconductor |
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| FM4005M | 制造商:WEITRON 制造商全称:Weitron Technology 功能描述:Surface Mount Standard Recovery Glass Passivated Rectifiers |
| FM4005-M | 制造商:FORMOSA 制造商全称:Formosa MS 功能描述:Glass passivated type |
| FM4005MH | 制造商:WEITRON 制造商全称:Weitron Technology 功能描述:Surface Mount Standard Recovery Glass Passivated Rectifiers |
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