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CYK128K16SCCBU-55BVI

更新时间： 2024-02-06 04:56:38

品牌	Logo	应用领域
赛普拉斯 - CYPRESS		/
页数	文件大小	规格书
10页	182K
描述
2-Mbit (128K x 16) Pseudo Static RAM

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CYK128K16SCCB

2-Mbit (128K x 16) Pseudo Static RAM

Features

Functional Description^[1]

• Advanced low-power MoBL^®architecture

• High speed: 55 ns, 70 ns

The CYK128K16SCCB is a high-performance CMOS pseudo

static RAM (PSRAM) organized as 128K words by 16 bits that

supports an asynchronous memory interface. This device

features advanced circuit design to provide ultra-low active

current. This is ideal for providing More Battery Life™ (MoBL)

in portable applications such as cellular telephones. The

device can be put into standby mode, reducing power

consumption dramatically when deselected (CE₁LOW, CE₂

HIGH or both BHE and BLE are HIGH). The input/output pins

(I/O₀through I/O₁₅) are placed in a high-impedance state

when the chip is deselected (CE₁HIGH, CE₂LOW) or OE is

deasserted HIGH), or during a write operation (Chip Enabled

and Write Enable WE LOW). Reading from the device is

accomplished by asserting the Chip Enables (CE₁LOW and

CE₂HIGH) and Output Enable (OE) LOW while forcing the

Write Enable (WE) HIGH. If Byte Low Enable (BLE) is LOW,

then data from the memory location specified by the address

pins will appear on I/O₀to I/O₇. If Byte High Enable (BHE) is

LOW, then data from memory will appear on I/O₈to I/O₁₅. See

the Truth Table for a complete description of read and write

modes.

• Wide voltage range: 2.7V to 3.3V

• Typical active current: 1 mA @ f = 1 MHz

• Low standby power

• Automatic power-down when deselected

Logic Block Diagram

DATA IN DRIVERS

A₁₀

A₉

A₈

A₇

A₆

A₅

A₄

A₃

A₂

A₁

A₀

128K x 16

RAM Array

I/O₀–I/O₇

I/O₈–I/O₁₅

COLUMN DECODER

BHE

CE₂

CE₁

BLE

CE₂

CE₁

Power -Down

Circuit

BHE

BLE

Note:

1. For best-practice recommendations, please refer to the Cypress application note “System Design Guidelines” on http://www.cypress.com.

Cypress Semiconductor Corporation

Document #: 38-05525 Rev. *F

•

3901 North First Street

•

San Jose, CA 95134

•

408-943-2600

Revised January 26, 2005

12 3 4 5 6 7...10

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