¡ Semiconductor

MSM6587

1/13

¡ Semiconductor

MSM6587

524,288-Word x 1-Bit Serial Register

GENERAL DESCRIPTION

The MSM6587 is a serial register in 524,288 words x 1 bit configuration featuring medium speed

operation with low-power consumption.

The MSM6587 has a built-in internal address generator circuit allowing continuous serial read/write

operationbyexternalclockinput. Theinternaladdressisautomaticallyincrementedordecremented

by one by read/write operation. Address increment or decrement can be selected by external input.

Address designation in units of 1024 words in the direction of words is possible by an external

serial address input.

A refresh timer and refresh counter are built in to eliminate the need of the external refresh circuit

and to realize low power consumption.

18-pin plastic QFJ (PLCC) is used as the package and the operating temperature range is between

0

°C and 70°C.

The MSM6587 is suitable for storing large capacity data with battery backup. A solid state recording

and playback system can easily be constructed in combination with OKI’s voice synthesizer ICs.

FEATURES

• Configuration

: 524,288 x 1 bit

• Serial access operation

Serial access time

: 1.5 ms (3.0 ms)

Serial read/write cycle time

: 2.0 ms (4.0 ms)

Fast mode read/write cycle time : 0.4 ms (0.4 ms)

Times in parentheses indicate ones in self-refresh mode.

• Low current consumption

: 100 mA max. (for data holding, Vcc=4.0 V)

• Wide operating supply voltage range

: Single 3.5 to 5.5 V

• Auto-refresh/self-refresh changeable

• Package:

18-pin plastic QFJ (PLCC) (QFJ18-P-R290-1.27) (Product name : MSM6587JS)

E2D0032-39-21

This version: Feb. 1999

Previous version: May. 1997