LH52256C 데이터 시트보기 (PDF) - Sharp Electronics

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LH52256C

CMOS 256K (32K × 8) Static RAM

Sharp Electronics 

LH52256C/CH

A8 25

A14 1

A13 26

A12 2

A7 3

A6 4

A5 5

A4 6

A3 7

ROW

DECORDER

CMOS 256K (32K × 8) Static RAM

MEMORY

ARRAY

(512 x 512)

8

COLUMN I/O

CIRCUIT

COLUMN

8

DECODER

OUTPUT

BUFFERS

28 VCC

14 GND

11 I/O1

12 I/O2

13 I/O3

15 I/O4

16 I/O5

17 I/O6

18 I/O7

19 I/O8

WE 27

OE 22

CE 20

INPUT

DATA

CONTROL

10 9 8 21 24 23

A0 A1 A2 A10 A9 A11

Figure 3. LH52256C Block Diagram

52256C-2

PIN DESCRIPTION

SIGNAL

A0 - A14

CE

WE

OE

PIN NAME

Address inputs

Chip enable

Write enable

Output enable

SIGNAL

I/O1 - I/O8

VCC

GND

PIN NAME

Data inputs and outputs

Power supply

Ground

2

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