CY62146E MoBL 4-Mbit (256 K 16) Static RAM 4-Mbit (256 K 16) Static RAM feature that reduces power consumption when addresses are Features not toggling. Placing the device into standby mode reduces power consumption by more than 99% when deselected (CE Very high speed: 45 ns HIGH). The input and output pins (I/O through I/O ) are placed 0 15 Wide voltage range: 4.5 V to 5.5 V in a high impedance state when the device is deselected (CE HIGH), the outputs are disabled (OE HIGH), both Byte High Ultra low standby power Enable and Byte Low Enable are disabled (BHE, BLE HIGH) or Typical standby current: 1 A during a write operation (CE LOW and WE LOW). Maximum standby current: 7 A To write to the device, take Chip Enable (CE) and Write Enable Ultra low active power (WE) inputs LOW. If Byte Low Enable (BLE) is LOW, then data Typical active current: 2 mA at f = 1 MHz from I/O pins (I/O through I/O ) is written into the location 0 7 specified on the address pins (A through A ). If Byte High 0 17 Easy memory expansion with CE and OE features Enable (BHE) is LOW, then data from I/O pins (I/O through 8 Automatic power down when deselected I/O ) is written into the location specified on the address pins 15 (A through A ). 0 17 Complementary metal oxide semiconductor (CMOS) for To read from the device, take Chip Enable (CE) and Output optimum speed and power Enable (OE) LOW while forcing the Write Enable (WE) HIGH. If Available in Pb-free 44-pin thin small outline package (TSOP) Byte Low Enable (BLE) is LOW, then data from the memory Type II package location specified by the address pins appears on I/O to I/O . If 0 7 Byte High Enable (BHE) is LOW, then data from memory Functional Description appears on I/O to I/O . See Truth Table on page 11 for a 8 15 complete description of read and write modes. The CY62146E is a high performance CMOS static RAM The CY62146E device is suitable for interfacing with processors organized as 256K words by 16 bits. This device features that have TTL I/P levels. It is not suitable for processors that advanced circuit design to provide ultra low active current. It is require CMOS I/P levels. Please Electrical Characteristics on ideal for providing More Battery Life (MoBL ) in portable page 4 for more details and suggested alternatives. applications. The device also has an automatic power down Logic Block Diagram DATA IN DRIVERS A 10 A 9 A 8 A 7 A 6 256 K 16 A 5 I/O I/O 0 7 A RAM Array 4 A 3 I/O I/O 8 15 A 2 A 1 A 0 COLUMN DECODER BHE WE CE OE BLE Cypress Semiconductor Corporation 198 Champion Court San Jose, CA 95134-1709 408-943-2600 Document Number: 001-07970 Rev. *K Revised August 22, 2013 ROW DECODER A 11 A 12 A 13 A 14 A 15 A 16 A 17 SENSE AMPS CY62146E MoBL Contents Pin Configurations ...........................................................3 Ordering Information ...................................................... 12 Product Portfolio ..............................................................3 Ordering Code Definitions ......................................... 12 Maximum Ratings .............................................................4 Package Diagram ............................................................ 13 Operating Range ...............................................................4 Acronyms ........................................................................14 Electrical Characteristics .................................................4 Document Conventions ................................................. 14 Capacitance ......................................................................5 Units of Measure ....................................................... 14 Thermal Resistance ..........................................................5 Document History Page ................................................. 15 AC Test Loads and Waveforms .......................................5 Sales, Solutions, and Legal Information ...................... 16 Data Retention Characteristics .......................................6 Worldwide Sales and Design Support ....................... 16 Data Retention Waveform ................................................6 Products ....................................................................16 Switching Characteristics ................................................7 PSoC Solutions ...................................................... 16 Switching Waveforms ......................................................8 Cypress Developer Community ................................. 16 Truth Table ......................................................................11 Technical Support ..................................................... 16 Document Number: 001-07970 Rev. *K Page 2 of 16