FM30C256S Ramtron, FM30C256S Datasheet

FM30C256S

Manufacturer Part Number

FM30C256S

Description

SOP-20

Manufacturer

Ramtron

Datasheet

1.FM30C256S.pdf (18 pages)

Specifications of FM30C256S

Date_code

01+

Current page: 1 of 18
Download datasheet (165Kb)

FM30C256

256Kb Data Collector

Features

256K bit Ferroelectric Nonvolatile RAM

Fast Two-wire Serial Interface

Description

The FM30C256 is a 256-kilobit data collection

subsystem including nonvolatile RAM, timekeeping,

CPU supervisor, and system tamper detection. Non-

volatile RAM is provided by FRAM technology,

which is ideal for collection data and requires no

battery backup for nonvolatile storage. In other

respects, it provides the same features as SRAM.

FRAM performs write operations at bus speed with

no write delays. Write cycles can be continuous

without block limitations. In addition, it offers much

higher write endurance than other nonvolatile

memories. The FM30C256 supports up to 10

read/write cycles.

The FM30C256 also includes timekeeping with

external battery backup. The timekeeper consists of

registers that represent time and date information in

BCD format. The clock includes a calibration mode

that allows a software adjustment for timekeeping

accuracy.

To maintain system data integrity, the FM30C256

provides a reset signal asserted when VDD is out of

tolerance. /RST remains active for 100 ms after VDD

returns to proper levels. The FM30C256 also

provides a battery-backed tamper detect circuit that

records a rising edge on the TIN input. A battery-

backed flag is set when the event occurs, but can only

be cleared by software.

The FM30C256 is provided in a 20-pin SOIC

package and is guaranteed over an industrial

temperature range of –40°C to +85°C.

This product conforms to specifications per the terms of the Ramtron

standard warranty. Production processing does not necessarily in-

clude testing of all parameters.

Rev 2.3

Jan. 2006

Organized as 32,768 x 8 bits

High Endurance 10 Billion (10

10 year Data Retention

NoDelay™ Writes

Advanced High-Reliability Ferroelectric Process

Up to 1 MHz Maximum Bus Frequency

Supports Legacy Timing for 100 kHz & 400 kHz

Clock Registers Accessed via 2-wire Interface

) Read/Writes

Real-time Clock/Calendar

System Supervisor

Pin Configuration

Pin Names

TIN

A0-A2

CAL

/RST

X1, X2

SDA

SCL

VDD

VBAK

VSS

Ordering Information

FM30C256-S

Backup Current under 1 A

Tracks Seconds through Centuries (BCD format)

Tracks Leap Years through 2099

Uses Standard 32.768 kHz Crystal (6pF)

Software Calibration

Active-low Reset Output for V

Tamper Detect Input with Battery Backup and

Time Stamp

RST

VSS

CAL

TIN

(800) 545-FRAM, (719) 481-7000, Fax (719) 481-7058

1850 Ramtron Drive, Colorado Springs, CO 80921

Function

Tamper Detect input

Device Select inputs

Clock Calibration output

Reset Output

Crystal Connections

Serial Data

Serial Clock

Supply Voltage 5V

Battery-Backup input

Ground

20-pin SOIC

Ramtron International Corporation

www.ramtron.com

Out-of-Tolerance

SCL

SDA

VDD

VBAK

Page 1 of 18

Related parts for FM30C256S

Related keywords

FM30C256S datasheet
FM30C256S data sheet
FM30C256S pdf datasheet
FM30C256S component
FM30C256S part
FM30C256S distributor
FM30C256S RoHS
FM30C256S datasheet download