DS1217M-1-25 Dallas Semiconductor, DS1217M-1-25 Datasheet

DS1217M-1-25

Manufacturer Part Number

DS1217M-1-25

Description

Nonvolatile Read/Write Cartridge, 128KBx8

Manufacturer

Dallas Semiconductor

Datasheet

1.DS1217M-1-25.pdf (4 pages)

Specifications of DS1217M-1-25

Capacitance, Input

100 pF

Capacitance, Output

100 pF

Current, Input, Leakage

±60 μA

Current, Operating

50 mA

Current, Output, Leakage

±10

Data Retention

5 yrs.

Density

Interface

Parallel Bus

Memory Type

Non-Volatile RAM

Organization

64K×8 to 512K×8

Package Type

Cartridge

Temperature, Operating

0 to +70 °C

Time, Access

250 ns

Time, Address Hold

Time, Fall

5 ns

Time, Rise

5 ns

Voltage, Input, High

5 V

Voltage, Input, Low

0.8 V

Voltage, Supply

5 V

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GENERAL DESCRIPTION

The DS1217M is a nonvolatile RAM designed for

portable applications requiring a rugged and durable

package. The nonvolatile cartridge has memory

capacities from 64k x 8 to 512k x 8. The cartridge is

accessed in continuous 32k byte banks. Bank

switching is accomplished under software control by

pattern recognition from the address bus. A card

edge connector is required for connection to a host

system. A standard 30-pin connector can be used for

direct mount to a printed circuit board. Alternatively,

remote mounting can be accomplished with a ribbon

cable terminated with a 28-pin DIP plug. The remote

method can be used to retrofit existing systems that

have JEDEC 28-pin bytewide memory sites.

ORDERING INFORMATION

PIN CONFIGURATION

DS1217M

TOP VIEW

PART

TEMP RANGE

0°C to +70°C

PIN-PACKAGE

30 Cartridge

Nonvolatile Read/Write Cartridge

1 of 8

FEATURES

Package Drawing appears at end of data sheet.

User Insertable

Data Retention Greater than 5 Years

Capacity to 512k x 8

Standard Bytewide Pinout Facilitates

Connection to JEDEC 28-Pin DIP Through

Ribbon Cable

Software-Controlled Banks Maintain 32 x 8

JEDEC 28-Pin Compatibility

Multiple Cartridges Can Reside on a Common

Bus

Automatic Write Protection Circuitry

Safeguards Against Data Loss

Manual Switch Unconditionally Protects Data

Compact Size and Shape

Rugged and Durable

Operating Temperature Range: 0°C to +70°C

DS1217M

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DS1217M-1-25 Summary of contents

Page 1

... GENERAL DESCRIPTION The DS1217M is a nonvolatile RAM designed for portable applications requiring a rugged and durable package. The nonvolatile cartridge has memory capacities from 64k 512k x 8. The cartridge is accessed in continuous 32k byte banks. Bank switching is accomplished under software control by pattern recognition from the address bus. A card edge connector is required for connection to a host system ...

Page 2

ABSOLUTE MAXIMUM RATINGS Voltage Range on Connection Relative to Ground Operating Temperature Range Storage Temperature Range Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of ...

Page 3

AC ELECTRICAL CHARACTERISTICS ( ±10 0°C to +70°C PARAMETER Read Cycle Time Access Time OE to Output Valid CE to Output Valid Output Active Output High-Z from Deselection Output Hold ...

Page 4

... Note 9: Removing and installing the cartridge with power applied may disturb data. Note 10: Each DS1217M I smarked with a 4-digit code AABB. AA designates the year of manufacture. BB designates the week of manufacture. The expected t process control, and design not measured directly during production testing. SYMBOL ...

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