PARADIGM PDM41258LA15SOATY, PDM41258LA15SOITR, PDM41258LA15SOITY, PDM41258LA15SOTR, PDM41258LA15SOTY Datasheet

Rev. 2.2 - 4/27/98 1

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Features

n

High speed access times
Com’l: 7, 8, 10, 12 and 15 ns
Ind’l: 8, 10, 12 and 15 ns

n

Low power operation (typical)

- PDM41258SA
Active: 400 mW
Standby: 150 mW

- PDM41258LA
Active: 350 mW
Standby: 25 mW

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Single +5V (

±

10%) power supply

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TTL compatible inputs and outputs

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Packages
Plastic SOJ (300 mil) - SO

Description

The PDM41258 is a high-performance CMOS static
RAM organized as 65,536 x 4 bits. Writing to this
device is accomplished when the write enable (WE

)

and the chip enable (CE

) inputs are both LOW.

Reading is accomplished when WE

remains HIGH

and CE

goes LOW.

The PDM41258 operates from a single +5V power
supply and all the inputs and outputs are fully TTL­compatible. The PDM41258 comes in two versions,
the standard power version PDM41258SA and a low
power version the PDM41258LA. The two versions
are functionally the same and only differ in their
power consumption.

The PDM41258 is available in a 24-pin 300-mil plas­tic SOJ for surface mount applications.

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A

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15

I/O
I/O
I/O
I/O

0

1

2

3

CE

WE

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Addresses

Decoder Memory

Matrix

Input
Data
Control

Column I/O

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Functional Block Diagram

PDM41258

256K Static RAM

64K x 4-Bit

PDM41258

2 Rev. 2.2 - 4/27/98

Absolute Maximum Ratings

(1)

NOTE: 1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may

cause permanent damage to the device. This is a stress rating only and functional
operation of the device at these or any other conditions above those indicated in the
operational sections of this specification is not implied. Exposure to absolute maxi­mum rating conditions for extended periods may affect reliability

.2. Appropriate thermal calculations should be performed in all cases and specifically for

those where the chosen package has a large thermal resistance (e.g., TSOP). The
calculation should be of the form

: T

j

= T

a

+ P * θ

ja

, where T

a

is the ambient tempera-

ture, P is average oper ating po w er and θ

ja

the thermal resistance of the package. For

this product, use the following θ

ja

value:

SOJ: 83

o

C/W

Symbol Rating Com’l. Ind. Unit

T

TERM

Terminal Voltage with Respect to V

SS

–0.5 to +7.0 –0.5 to +7.0

°

C

T

BIAS

Temperature Under Bias –55 to +125 –65 to +135

°

C

T

STG

Storage Temperature –55 to +125 –65 to +150

°

C

P

T

Power Dissipation 1.0 1.0 W

I

OUT

DC Output Current 50 50 mA

T

j

Maximum Junction Temperature

(2)

125 145

°

C

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12 13

14

15

16

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18

19

20

21

22

23

24

A0
A1
A2
A3
A4
A5
A6
A7
A8
A9

CE

Vss

Vcc
A15
A14
A13
A12
A11
A10
I/O3
I/O2
I/O1
I/O0

WE

Pin Configuration

SOJ

Pin Description

Name Description

A15-A0 Address Inputs
I/O3-I/O0 Data Inputs and Outputs
WE

Write Enable Input

CE

Chip Enable Input

V

CC

Power (+5V)

V

SS

Ground

T ruth T able

NOTE:1.H = V

IH

, L = V

IL

, X = DON’T CARE

WE CE I/O MODE

X H Hi-Z Standby

HLD

OUT

Read

LLD

IN

Write

PDM41258

Rev. 2.2 - 4/27/98 3

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Recommended DC Operating Conditions

DC Electrical Characteristics

(1)

(V

CC

= 5.0V ± 10%)

NOTE: 1. V

IL

(min) = –3.0V for pulse width less than 20 ns.

Power Supply Characteristics

SHADED AREA = PRELIMINARY DATA
NOTE:All values are maximum guaranteed values.

Symbol Parameter Min. Typ. Max. Unit

V

CC

Supply Voltage 4.5 5.0 5.5 V

V

SS

Supply Voltage 0 0 0 V

Commercial Ambient Temperature 0 25 70

°

C

Industrial Ambient T emperature –40 25 85

° C

PDM41258SA PDM41258LA

Symbol Parameter Test Conditions Min. Max. Min. Max. Unit

I

LI

Input Leakage Current V

CC

= MAX., V

IN

= V

SS

to V

CC

Com’l/
Ind.

–55–55

µ

A

I

LO

Output Leakage Current V

CC

= MAX.,

CE

= V

IH

, V

OUT

= V

SS

to V

CC

Com’l/
Ind.

–55–55

µ

A

V

IL

Input Low Voltage –0.5

(1)

0.8 –0.5

(1)

0.8 V

V

IH

Input High Voltage 2.2 6.0 2.2 6.0 V

V

OL

Output Low Voltage I

OL

= 8 mA, V

CC

= Min.

I

OL

= 10 mA, V

CC

= Min.

—
—

0.4

0.5

—
—

0.4

0.5

V
V

V

OH

Output High Voltage I

OH

= –4 mA, V

CC

= Min. 2.4 — 2.4 — V

-7 -8 -10 -12 -15

Symbol Parameter Power

Com’l. Com’l. Ind. Com’l. Ind. Com’l. Ind. Com’l. Ind. Units

I

CC

Operating Current
CE

= V

IL

SA 210 200 210 190 200 180 190 170 180 mA

f = f

MAX

= 1/t

RC

V

CC

= Max

I

OUT

= 0 mA

LA

190 180 190 170 180 160 170 150 160 mA

I

SB

Standby Current
CE

= V

IH

SA

90 80 80 70 70 60 60 50 50 mA

f = f

MAX

= 1/t

RC

V

CC

= Max

LA

90 80 80 70 70 60 60 50 50 mA

I

SB1

Full Standby Current
CE

≥ V

CC

– 0.2V

SA

20 20 20 20 20 20 20 20 20 mA

f = 0
V

CC

= Max

V

IN

≥

V

CC

– 0.2V or ≤ 0.2V

LA

5 55555555mA