日期：2008-03-07 来源：

       单芯片解决方案减少了使用材料，并消除了晶体引脚疲劳，是电表和时戳应用最理想的选择

        2008年3月4日-全球领先的非易失性铁电随机存取器（FeRAM）和集成半导体产品的开发商和供应商Ramtron国际公司，推出64 KB、3V的处理器伴侣产品FM3135，该产品集成了非挥发性F-RAM存储器、增强型实时时钟/日历（RTC）以及内部32千赫晶体。

        “最常用、成本最低的晶体是一种通孔晶体，”Ramtron应用与技术支持总监克雷格泰勒解释到：“嵌入式晶体削减了材料费用，免除了繁琐的插入和焊接直通孔晶体的步骤（常为手工） ，并消除了在装配和处理过程中可能引起的晶体引脚疲劳。”

        FM3135主要设计用于电表、耗用时间显示器、分时记录，以及其他需要时戳的数据储存应用。高耐力和快速写入的F-RAM与实时时钟想结合，使FM3135成为需要时戳的系统的理想选择。

关于FM3135
        FM3135集成了64KB F-RAM、带报警功能的实时时钟（RTC）和可编程频率时钟输出。警钟比较用户编程的报警值，以符合实时时钟时间/日期值，为具有自动/关闭、通道交换机、家长控制和个人录影机（PVR）功能的高端电视应用，创造了理想的解决方案。同时通过一条工业标准两线总线用来存取记忆体，并控制实时时钟。FM3135采用20引脚SOIC封装，在整个工业温度范围（-40摄氏度至+85摄氏度）下运行电压为2.7 至3.6伏特。更多产品信息，请访问www.ramtron.com/doc/Products/Nonvolatile/Nonvolatile_Memory.asp?ID=136&gr=12.

FM3135特性：
        内置32khz晶体：设计师可以表面贴装晶体，从而消除了在在装配作业中可能引起的晶体引脚疲劳，而无须获得和库存晶体。

         64KB F-RAM： 64KB真正的非易失性存储器（不需备份电池）。F-RAM存储器技术以其无延迟的总线写入速度、无限次读/写次数和低功耗等特点，取代了SRAM、 EEPROM、闪存和其它非易失性记忆体。

        实时时钟（RTC） ：支持后备电池或电容，提供了高精度的软件校准功能、闹钟和一个可编程频率时钟输出。

        后备电源：可为实时时钟/日历提供永久供电。当主系统电源故障时，VDD引脚电压将下降。当VDD电压低于2.5 V时，实时时钟将切换到VBAK的备用电源。备用电源可以是电池或电容。
涓流充电器：便于电容备份。VBAK引脚可以选择性地提供一个涓流充电电流。数据是非易失性的，所以在电容器故障下，也不会丢失。

价格与供货
        FM3135的样品现已提供，采用20引脚SOIC封装，10K片单价起价为3.20美元。

原英文对照：

New single-chip solution reduces bill of materials and eliminates fatigue on crystal pins; ideal for meters and other time-stamp applications
COLORADO SPRINGS, CO — March 4, 2008 — Ramtron International Corporation (Nasdaq: RMTR), a leading developer and supplier of nonvolatile ferroelectric random access memory (F-RAM) and integrated semiconductor products, today launched the FM3135, a 64-kilobit (Kb), 3-volt Processor Companion product that combines the benefits of nonvolatile F-RAM memory with an enhanced real-time clock/calendar (RTC) and integrated 32 kHz watch crystal.

“The most commonly used and lowest cost crystal is a through-hole component,” explains Craig Taylor, Director of Applications and Technical Support. “Embedding the crystal cuts bill of material costs, removes the cumbersome step of inserting and soldering a through-hole crystal (often done by hand), and eliminates the possibility of fatigue on the crystal pins during assembly and handling.”

The FM3135 is designed for use in meters, elapsed time monitors, time-of-use recording, and other data-storage applications that require time-stamping. The high endurance and fast writes of F-RAM combined with an RTC make it ideal for systems that time stamp events.

About the FM3135
The FM3135 combines 64Kb of F-RAM with an RTC that incorporates an alarm and a programmable frequency clock output. The alarm compares user-programmed alarm values to corresponding RTC time/date values, creating an ideal solution for applications such as high-end televisions that boast automatic on/off, channel switch and parental controls, and personal video recorder (PVR) functions. An industry-standard 2-wire bus is used to access the memory and to control the RTC. Available in a 20-pin SOIC package, the FM3135 operates at 2.7 to 3.6 volts over the entire industrial temperature range (-40 degrees C to +85 degrees C). For more product information, visit www.ramtron.com/doc/Products/Nonvolatile/Nonvolatile_Memory.asp?ID=136&gr=12.

FM3135 Features:
Embedded 32kHz Watch Crystal: This allows designers to surface mount the crystal, eliminating the possibility of fatigue on the crystal pins during assembly operations without having to source and inventory the crystal.
8Kx8 F-RAM: 64Kb of true nonvolatile RAM (not battery-backed). F-RAM memory technology replaces SRAM, EEPROM, Flash and other nonvolatile memories since it reads and writes at bus speed with NoDelay™ writes, unlimited read/write endurance, and low power.
Real-Time Clock (RTC): A timekeeping device that can be battery- or capacitor-backed for permanently powered operation. It offers a software calibration feature for high accuracy, an alarm and a programmable frequency clock output.
Backup Power: The real-time clock/calendar is intended to be permanently powered. When the primary system power fails, the voltage on the VDD pin will drop. When VDD is less then 2.5V, the RTC will switch to the backup power supply on VBAK. The backup source can be either a battery or capacitor.
Trickle Charger: Facilitates capacitor backup. The VBAK pin can optionally provide a trickle charge current. Data is nonvolatile so it won’t be lost if the capacitor fails.

About the Processor Companion
The Processor Companion is a highly integrated F-RAM enhanced system management solution that supports virtually any microcontroller- or microprocessor-based design. By integrating nonvolatile F-RAM, individual system features are improved compared with discrete versions, creating a single-chip solution with superior bill-of-material cost and reduced board space.

Pricing and Availability
Samples of the FM3135 are currently available in a 20-pin SOIC package, with pricing starting at $3.20 in 10K quantities.

About Ramtron
Ramtron International Corporation, headquartered in Colorado Springs, Colorado, is a fabless semiconductor company that designs, develops and markets specialized semiconductor memory and integrated semiconductor solutions used in a wide range of product applications and markets worldwide. For more information, visit www.ramtron.com.

For a 300-dpi product photo, visit www.ramtron.com/doc/Press/Images.asp.