Datasheet > WCMA4016U4X-FF70

WCMA4016U4X-FF70

更新时间： 2024-02-12 09:57:12

品牌	Logo	应用领域
韦达 - WEIDA		/
页数	文件大小	规格书
12页	220K
描述
256K x 16 Static RAM

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技术参数
数据手册

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WCMA4016U4X-FF70 技术参数

生命周期：	Obsolete	包装说明：	,
Reach Compliance Code：	unknown	风险等级：	5.84

WCMA4016U4X-FF70 数据手册

A4016U4X

WCMA4016U4X

256K x 16 Static RAM

more than 99% when deselected (CE HIGH or both BLE and

BHE are HIGH). The input/output pins (I/O₀through I/O₁₅) are

placed in a high-impedance state when: deselected (CE

HIGH), outputs are disabled (OE HIGH), both Byte High En-

able and Byte Low Enable are disabled (BHE, BLE HIGH), or

during a write operation (CE LOW and WE LOW).

Features

• Low Voltage range:

— 2.7V-3.3V

• Ultra-low active power

— Typical active current: 1.5 mA @ f = 1MHz

Writing to the device is accomplished by taking Chip Enable

(CE) and Write Enable (WE) inputs LOW. If Byte Low Enable

(BLE) is LOW, then data from I/O pins (I/O₀through I/O₇), is

written into the location specified on the address pins (A₀

through A₁₇). If Byte High Enable (BHE) is LOW, then data

from I/O pins (I/O₈through I/O₁₅) is written into the location

specified on the address pins (A₀through A₁₇).

— Typical active current: 7 mA @ f = f_max

• Low standby power

• Easy memory expansion with CE and OE features

• Automatic power-down when deselected

• CMOS for optimum speed/power

Reading from the device is accomplished by taking Chip

Enable (CE) 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 at the back of this data sheet for a complete

description of read and write modes.

Functional Description

The WCMA4016U4X is a high-performance CMOS static

RAMs organized as 256K words by 16 bits. These devices

feature advanced circuit design to provide ultra-low active cur-

rent. This device is ideal for portable applications such as cel-

lular telephones. The devices also have an automatic pow-

er-down feature that significantly reduces power consumption

by 80% when addresses are not toggling. The device can also

be put into standby mode reducing power consumption by

The WCMA4016U4X is available in a 48-ball FBGA package.

Logic Block Diagram

DATA IN DRIVERS

256K x 16

RAM Array

I/O – I/O

2048 x 2048

I/O – I/O

COLUMN DECODER

BHE

BLE

Power -Down

Circuit

BHE

BLE

12 3 4 5 6 7...12

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