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DS3045W-100 Datasheet

  • DS3045W-100

  • 3.3V Single-Piece 1Mb Nonvolatile SRAM with Clock

  • 550.78KB

  • 18頁(yè)

  • MAXIM   MAXIM

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Rev 0; 6/05
3.3V Single-Piece 1Mb Nonvolatile SRAM
with Clock
General Description
The DS3045W consists of a static RAM, a nonvolatile
(NV) controller, a year 2000-compliant real-time clock
(RTC), and an internal rechargeable manganese lithium
(ML) battery. These components are encased in a sur-
face-mount module with a 256-ball BGA footprint.
Whenever V
CC
is applied to the module, it recharges
the ML battery, powers the clock and SRAM from the
external power source, and allows the contents of the
clock registers or SRAM to be modified. When V
CC
is
powered down or out-of-tolerance, the controller write-
protects the memory contents and powers the clock
and SRAM from the battery. The DS3045W also con-
tains a power-supply monitor output (RST), as well as a
user-programmable interrupt output (IRQ/FT).
Features
鈾?/div>
Single-Piece, Reflowable, 27mm x 27mm BGA
Package Footprint
鈾?/div>
Internal Manganese Lithium Battery and Charger
鈾?/div>
Integrated Real-Time Clock
鈾?/div>
Unconditionally Write-Protects the Clock and
SRAM when V
CC
is Out-of-Tolerance
鈾?/div>
Automatically Switches to Battery Supply when
V
CC
Power Failures Occur
鈾?/div>
Reset Output can be Used as a CPU Supervisor
鈾?/div>
Interrupt Output can be Used as a CPU Watchdog
Timer
鈾?/div>
Industrial Temperature Range (-40擄C to +85擄C)
鈾?/div>
UL Recognized
DS3045W
Applications
RAID Systems and Servers
POS Terminals
Industrial Controllers
Data-Acquisition Systems
Gaming
Fire Alarms
PLCs
Routers/Switches
Ordering Information
PART
DS3045W-100
TEMP RANGE
-40擄C to +85擄C
PIN-PACKAGE
256-ball 27mm x 27mm BGA Module
SPEED
100ns
SUPPLY VOLTAGE
3.3V 鹵0.3V
Typical Operating Circuit
CE
WR
RD
CS
CE
WE
OE
CS
MICROPROCESSOR
OR DSP
DATA
DS3045W
8 BITS
DQ0鈥?
128k x 8
NV SRAM
AND RTC
ADDRESS
17 BITS
A0鈥?6
INT
INT
IRQ/FT
RST
Pin Configuration appears at end of data sheet.
______________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.

DS3045W-100 產(chǎn)品屬性

  • Maxim Integrated Products

  • 8 bit

  • 1 Mbit

  • 128 K x 8

  • Parallel

  • 100 ns

  • 3.6 V

  • 3 V

  • 50 mA

  • + 85 C

  • - 40 C

  • BGA-256

  • SMD/SMT

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