Maker : Maxim Integrated Products
Part No. : DS2045AB

  Datasheet PDF : DS2045AB.pdf
  Cross Reference : DS2045AB Cross Reference
  Buy Component : DS2045AB Find Stock and Price

Shortcut : DS2045AB 

Product Information

Rev 2; 1/05 w The DS2045 is a 1Mb reflowable nonvolatile (NV) SRAM, which consists of a static RAM (SRAM), an NV controller, and an internal rechargeable manganese lithium (ML) battery. These components are encased in a surface-mount module with a 256-ball BGA footprint. Whenever VCC 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 modified. When VCC is powered down or out of tolerance, the controller write-protects the SRAM’s contents and powers the SRAM from the battery. Two versions of the DS2045 are available, which provide either a 5% or 10% power-monitoring trip point. The DS2045 also contains a power-supply monitor output, RST, which can be used as a CPU supervisor for a microprocessor. w w .D at Sh a et e 4U . om c DS2045Y/AB Single-Piece 1Mb Nonvolatile SRAM Features ♦ Single-Piece, Reflowable, PBGA Package Footprint ♦ Internal ML Battery and Charger ♦ Unconditionally Write-Protects SRAM when VCC is Out-of-Tolerance ♦ Automatically Switches to Battery Supply when VCC Power Failures Occur ♦ Internal Power-Supply Monitor Detects Power Fail at 5% or 10% Below Nominal VCC (5V) ♦ Reset Output can be used as a CPU Supervisor for a Microprocessor ♦ Industrial Temperature Range (-40°C to +85°C) ♦ UL Recognized 27mm2 General Description DS2045Y/AB Applications RAID Systems and Servers Industrial Controllers Gaming Router/Switches POS Terminals Data-Acquisition Systems Fire Alarms PLC Pin Configuration appears at end of data sheet. PART DS2045AB-70 DS2045AB-100 DS2045Y-70 DS2045Y-100 TEMP RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C 256 Ball 27mm2 BGA Module 256 Ball 27mm2 BGA Module 256 Ball 27mm2 BGA Module 256 Ball 27mm2 BGA Module w w w .D (CE0) (WR) (RD) t a PIN-PACKAGE S a e h U t4 e SPEED (ns) 70 100 70 100 .c m o Ordering Information SUPPLY TOLERANCE (%) 5 5 10 10 Typical Operating Circuit CE WE OE P4.0 P3.6 P3.7 8051 MICROPROCESSOR AD0–AD7 8 BITS DQ0–7 DS2045 128k x 8 NV SRAM P1.0–7 P4.4 P2.0–7 P3.2 (INT0) 8 BITS A0–7 A16 8 BITS A8–15 RST w For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at w 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. w ______________________________________________ Maxim Integrated Products .D a aS t ee h 4U t om .c 1 DS2045Y/AB Single-Piece 1Mb Nonvolatile SRAM DS2045Y/AB ABSOLUTE MAXIMUM RATINGS Voltage on Any Pin Relative to Ground .................-0.3V to +6.0V Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range ...............................-40°C to +85°C Soldering Temperature...................See IPC/JEDEC J-STD-020C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. RECOMMENDED OPERATING CONDITIONS (TA = -40°C to +85°C) PARAMETER Supply Voltage Input Logic 1 Input Logic 0 SYMBOL VCC VIH VIL DS2045AB DS2045Y CONDITIONS MIN 4.75 4.50 2.2 0 TYP MAX 5.25 5.50 VCC 0.8 UNITS V V V DC ELECTRICAL CHARACTERISTICS (VCC = 5V ±5% for DS2045AB, VCC = 5V ±10% for DS2045Y, TA = -40°C to +85°C.) PARAMETER Input Leakage Current I/O Leakage Current Output-Current High Output-Current Low Output-Current Low RST Standby Current Operating Current Write Protection Voltage SYMBOL IIL IIO IOH IOL IOL RST ICCS1 ICCS2 ICCO1 VTP CE = VCC At 2.4V At 0.4V At 0.4V (Note 1) CE = 2.2V CE = VCC - 0.5V tRC = 200ns, outputs open DS2045AB DS2045Y 4.50 4.25 4.62 4.37 CONDITIONS MIN -1.0 -1.0 -1.0 2.0 10.0 0.5 0.2 7 5 85 4.75 4.50 TYP MAX +1.0 +1.0 UNITS µA µA mA mA ...

Link URL