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DS1254

2M x 8 NV SRAM with Phantom Clock

www.maxim-ic.com

FEATURES

摟

Real-time clock (RTC) keeps track of hundredths

of seconds, seconds, minutes, hours, days, date,

months, and years with automatic leap-year

compensation valid up to the year 2100

2M x 8 NV SRAM

Watch function is transparent to RAM operation

Automatic data protection during power loss

Unlimited write-cycle endurance

Surface-mountable BGA module construction

Over 10 years of data retention in the absence of

power

Battery monitor checks remaining capacity daily

+3.3V or +5V operation

PACKAGE OUTLINE

摟

摟

摟

摟

摟

摟

摟

摟

Side -A- Shown

(For Reference Only, Not to Scale)

Component placement may vary.

ORDERING INFORMATION

PART

DS1254WB-

150

DS1254YB-

100

DS1254WB2-

150

DS1254YB2-

100

PIN-

PACKAGE

BGA, 3.3V

BGA, 5V

BGA, 3.3V

BGA, 5V

TEMP

RANGE

0擄C to +70擄C

0擄C to +70擄C

0擄C to +70擄C

0擄C to +70擄C

TOP

MARK

DS1254W-

150

DS1254Y-

100

DS1254W2-

150

DS1254Y2-

100

APPLICATIONS

Telecom Switches

Routers

RAID Systems

TYPICAL OPERATING CIRCUIT

PIN DESCRIPTION

V

CC

A0鈥揂20

DQ0鈥揇Q7

CE

OE

WE

BW

GND

- Supply Voltage

- Address Inputs

- Data I/O

- Chip-Enable Input

- Output-Enable Input

- Write-Enable Input

- Battery Warning Output

(Open Drain)

- Ground

Note:

Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device

may be simultaneously available through various sales channels. For information about device errata, click here:

www.maxim-ic.com/errata.

1 of 17

REV: 082203

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