UPD448012-B55X Просмотр технического описания (PDF) - NEC => Renesas Technology

Номер в каталоге

Компоненты Описание

Список матч

UPD448012-B55X

8M-BIT CMOS STATIC RAM 512K-WORD BY 16-BIT EXTENDED TEMPERATURE OPERATION

NEC => Renesas Technology 

Block Diagram

VCC

GND

A0

A18

I/O1 - I/O8

I/O9 - I/O16

µPD448012-X

Address

buffer

Row

decoder

Memory cell array

8,388,608 bits

Input data

controller

Sense amplifier /

Switching circuit

Column decoder

Address buffer

Output data

controller

/CE1

CE2

/LB

/UB

/WE

/OE

Truth Table

/CE1 CE2 /OE /WE /LB /UB

Mode

I/O

I/O1 - I/O8

I/O9 - I/O16

Supply current

H

×

×

×

×

×

Not selected High impedance High impedance

ISB

×

L

×

×

×

×

L

H

H

H

×

×

Output disable High impedance High impedance

ICCA

L

H

L

L

Word read

DOUT

DOUT

L

H Lower byte read

DOUT

High impedance

H

L Upper byte read High impedance

DOUT

×

L

L

L

Word write

DIN

DIN

L

H Lower byte write

DIN

High impedance

H

L Upper byte write High impedance

DIN

×

×

×

×

H

H

Not selected High impedance High impedance

ISB

Remark × : VIH or VIL

4

Data Sheet M14466EJ5V0DS

Share Link: