31

AT52BR1672(T)/1674(T)

2604B–STKD–09/02

Note:

1. Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is

stress rating only and the functional operation of the device under these or any other conditions above those indicated in the

operation of this specification is not implied. Exposure to the absolute maximum rating conditions for extended period may

affect reliability.

Notes:

2. SUB,SLB (Upper, Lower Byte Enable). These active LOW inputs allow individual bytes to be written or read. When SLB is

LOW, data is written or read to the lower byte, I/O0 - I/O7. When SUB is LOW, data is written or read to the upper byte, I/O8

- I/O15.

Note:

1. Undershoot: V

Absolute Maximum Ratings

(1)

Symbol

Parameter

Rating

Unit

Input/Output Voltage

-0.3 to 3.6

V

Power Supply

-0.3 to 4.6

V

Operating Temperature

-40 to 85

°C

Storage Temperature

-55 to 150

°C

P

D

Power Dissipation

1.0

W

Truth Table

SCS1

SCS2

SWE

SOE

SLB

(2)

SUB

(2)

Mode

I/O Pin

Power

I/O0 - I/O7

I/O8 - I/O15

H

(1)

X

XX

XX

Deselected

High-Z

High-Z

Standby

X

(1)

L

XX

H

H

L

(1)

HH

H

LH

Output Disabled

High-Z

High-Z

Active

HL

LL

LH

L

X

LH

Write

D

IN

High-Z

Active

HL

High-Z

D

IN

LL

D

IN

D

IN

High-Z

LH

HL

LH

Read

High-Z

Active

HL

High-Z

LL

D

OUT

High-Z

Recommended DC Operating Condition

Symbol

Parameter

Min

Typ

Max

Unit

V

CC

Supply Voltage

2.7

3.0

3.3

V

V

SS

Ground

0

0

0

V

Input High Voltage

2.2

V

(1)

Input Low Voltage

-0.31

(1)

0.6

V