P3C1256-12JC 查看數據表（PDF） - Performance Semiconductor

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P3C1256-12JC

HIGH SPEED 32K x 8 3.3V STATIC CMOS RAM

Performance Semiconductor 

P3C1256

HIGH SPEED 32K x 8

3.3V STATIC CMOS RAM

FEATURES

3.3V Power Supply

High Speed (Equal Access and Cycle Times)

— 12/15/20/25 ns (Commercial)

— 15/20/25 ns (Industrial)

Low Power

— 360 mW Active

Single 3.3 Volts ±0.3Volts Power Supply

Easy Memory Expansion Using CE and OE

Inputs

P3C1256

Common Data I/O

Three-State Outputs

Fully TTL Compatible Inputs and Outputs

Advanced CMOS Technology

Automatic Power Down

Packages

—28-Pin 300 mil DIP and SOJ

DESCRIPTION

The P3C1256 is a 262,144-bit high-speed CMOS

static RAM organized as 32Kx8. The CMOS memory

requires no clocks or refreshing, and has equal access

and cycle times. Inputs are fully TTL-compatible. The

RAM operates from a single 3.3V± 0.3V tolerance power

supply.

Access times as fast as 12 nanoseconds permit greatly

enhanced system operating speeds. CMOS is utilized

to reduce power consumption to a low level. The

P3C1256 is a member of a family of PACE RAM™ prod-

ucts offering fast access times.

The P3C1256 device provides asynchronous operation

with matching access and cycle times. Memory locations

are specified on address pins A0 to A14. Reading is ac-

complished by device selection (CE and output enabling

(OE) while write enable (WE) remains HIGH. By present-

ing the address under these conditions, the data in the

addressed memory location is presented on the data in-

put/output pins. The input/output pins stay in the HIGH Z

state when either CE or OE is HIGH or WE is LOW.

Package options for the P3C1256 include 28-pin 300 mil

DIP and SOJ packages.

FUNCTIONAL BLOCK DIAGRAM

A

(8)

A

I/O1

I/O2

WE

CE

OE

262,144-BIT

MEMORY

ARRAY

INPUT

DATA

CONTROL

COLUMN I/O

COLUMN

SELECT

••• •••

A

(7)

A

PIN CONFIGURATIONS

A0 1

A1 2

A2 3

A3 4

A4 5

A5 6

A6 7

A7 8

A8 9

A9 10

I/01 11

I/02 12

I/03 13

GND 14

28 VCC

27 WE

26 A14

25 A13

24 A12

23 A11

22 OE

21 A10

20 CE

19 I/08

18 I/07

17 I/06

16 I/05

15 I/04

1519B

DIP (P5), SOJ (J5)

TOP VIEW

Means Quality, Service and Speed

133

1Q97

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