DS2030Y Datasheet, PDF (1/12 Pages) Maxim Integrated Products – Single-Piece 256kb Nonvolatile SRAM

Rev 2; 1/05
DS2030Y/AB Single-Piece 256kb
Nonvolatile SRAM
General Description
The DS2030 is a 256kb reflowable nonvolatile (NV)
SRAM, which consists of a static RAM (SRAM), an NV
controller, and an internal rechargeable manganese lithi-
um (ML) battery. These components are encased in a
surface-mount module with a 256-ball BGA footprint.
Whenever V_CC is applied to the module, it recharges the
ML battery, powers the SRAM from the external power
source, and allows the contents of the SRAM to be modi-
fied. When V_CC is powered down or out of tolerance, the
controller write-protects the SRAM’s contents and pow-
ers the SRAM from the battery. Two versions of the
DS2030 are available, which provide either a 5% or 10%
power-monitoring trip point. The DS2030 also contains a
power-supply monitor output, RST, which can be used
as a CPU supervisor for a microprocessor.
Applications
RAID Systems and Servers POS Terminals
Industrial Controllers
Data-Acquisition Systems
Gaming
Fire Alarms
Router/Switches
PLC
Features
♦ Single-Piece, Reflowable, 27mm² PBGA Package
Footprint
♦ Internal ML Battery and Charger
♦ Unconditionally Write-Protects SRAM when V_CC
is Out-of-Tolerance
♦ Automatically Switches to Battery Supply when
V_CC Power Failures Occur
♦ Internal Power-Supply Monitor Detects Power Fail
at 5% or 10% Below Nominal V_CC (5V)
♦ Reset Output can be used as a CPU Supervisor
for a Microprocessor
♦ Industrial Temperature Range (-40°C to +85°C)
♦ UL Recognized
Pin Configuration appears at end of data sheet.
Ordering Information
PART
DS2030AB-70
DS2030AB-100
DS2030Y-70
DS2030Y-100
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
256 Ball 27mm² BGA Module
256 Ball 27mm² BGA Module
256 Ball 27mm² BGA Module
256 Ball 27mm² BGA Module
SPEED (ns)
70
100
70
100
SUPPLY TOLERANCE (%)
5
5
10
10
Typical Operating Circuit
(WR)
P3.6
(RD)
P3.7
PSEN
8051
MICROPROCESSOR
P0.0–7
8 BITS
ALE
P2.0–6
(INT3)
P1.5
FROM EXTERNAL DECODE LOGIC
CE
WE
AND
SN74AC573
LATCH
D0–7
Q0–7
LE
7 BITS
8 BITS
OE
DQ0–7
DS2030
32k x 8
NV SRAM
A0–7
A8–14
RST
______________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.