Datasheet > DS1217A

DS1217A

更新时间： 2022-11-27 02:23:38

品牌	Logo	应用领域
达拉斯 - DALLAS		/
页数	文件大小	规格书
8页	80K
描述
Nonvolatile Read/Write Cartridge

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DS1217A 数据手册

DS1217A

Nonvolatile Read/Write Cartridge

FEATURES

PIN ASSIGNMENT

• User-insertable

Name

Position

• Capacity up to 32K x 8

Ground

+5 Volts

No Connect

Address 14

Address 12

Address 7

Address 6

Address 5

Address 4

Address 3

Address 2

Address 1

Address 0

Data I/O 0

Data I/O 1

Data I/O 2

Ground

• Standard bytewide pinout facilitates connection to

JEDEC 28-pin DIP socket via ribbon cable

Write Enable

Address 13

Address 8

• Data retention greater than 10 years

Address 9

• Automatic write protection circuitry safeguards

against data loss

Address 11

Output Enable

Address 10

Cartridge Enable

Data I/O 7

• Manual switch unconditionally protects data

• Compact size and shape

A10

A11

A12

A13

A14

A15

B10

B11

B12

B13

B14

B15

Data I/O 6

• Rugged and durable

Data I/O 5

• Wide operating temperature range of 0°C to 70°C

Data I/O 4

Data I/O 3

OFF – ON

3”

See Mech. Drawings Section

DESCRIPTION

The DS1217A is a nonvolatile RAM designed for porta-

ble applications requiring a rugged and durable pack-

age. The nonvolatile cartridge is available in densities

ranging from 2K x 8 to 32K x 8 in 8K byte increments. A

card edge connector is required for connection to a host

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

rect mount to a printed circuit board. Alternatively, re-

mote mounting can be accomplished with a 28-conduc-

tor 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.

The DS1217A cartridge has a lifetime energy source to

retaindata and circuitry needed to automatically protect

memory contents. Reading and writing the memory lo-

cationsis the same as usingconventionalstaticRAM. If

the user wants to convert from read/write memory to

read-only memory, a manual switch is provided to un-

conditionally protect memory contents.

030598 1/8

12 3 4 5 6 7 8

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