CY62157E MoBL 8-Mbit (512 K 16) Static RAM 8-Mbit (512 K 16) Static RAM when deselected (CE HIGH or CE LOW or both BHE and BLE Features 1 2 are HIGH). The input or output pins (I/O through I/O ) are 0 15 placed in a high impedance state when: Very high speed: 45 ns Industrial: 40 C to +85 C Deselected (CE HIGH or CE LOW) 1 2 Automotive-E: 40 C to +125 C Outputs are disabled (OE HIGH) Wide voltage range: 4.5 V5.5 V Both Byte High Enable and Byte Low Enable are disabled Ultra low standby power (BHE, BLE HIGH) Typical standby current: 2 A Write operation is active (CE LOW, CE HIGH and WE LOW) 1 2 Maximum standby current: 8 A (Industrial) To write to the device, take Chip Enable (CE LOW and CE 1 2 Ultra low active power HIGH) and Write Enable (WE) inputs LOW. If Byte Low Enable Typical active current: 1.8 mA at f = 1 MHz (BLE) is LOW, then data from I/O pins (I/O through I/O ), is 0 7 written into the location specified on the address pins (A through Ultra low standby power 0 A ). If Byte High Enable (BHE) is LOW, then data from I/O pins 18 Easy memory expansion with CE , CE and OE features 1 2 (I/O through I/O ) is written into the location specified on the 8 15 address pins (A through A ). 0 18 Automatic power down when deselected To read from the device, take Chip Enable (CE LOW and CE 1 2 CMOS for optimum speed and power HIGH) and Output Enable (OE) LOW while forcing the Write Enable (WE) HIGH. If Byte Low Enable (BLE) is LOW, then data Available in Pb-free 44-pin TSOP II and 48-ball VFBGA from the memory location specified by the address pins appear package on I/O to I/O . If Byte High Enable (BHE) is LOW, then data from 0 7 memory appears on I/O to I/O . See Truth Table on page 12 Functional Description 8 15 for a complete description of read and write modes. The CY62157E is a high performance CMOS static RAM The CY62157E device is suitable for interfacing with processors organized as 512K 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. This require CMOS I/P levels. Please see Electrical Characteristics is ideal for providing More Battery Life (MoBL ) in portable on page 4 for more details and suggested alternatives. applications. The device also has an automatic power down For a complete list of related documentation, click here. feature that significantly reduces power consumption when addresses are not toggling. Place the device into standby mode Logic Block Diagram DATA IN DRIVERS A 10 A 9 A 8 A 7 A 6 512K x 16 A 5 RAM Array I/O I/O A 0 7 4 A 3 I/O I/O 8 15 A 2 A 1 A 0 COLUMN DECODER CE 2 CE 1 Power Down BHE Circuit CE WE 2 BHE CE 1 OE BLE BLE Cypress Semiconductor Corporation 198 Champion Court San Jose, CA 95134-1709 408-943-2600 Document Number: 38-05695 Rev. *L Revised November 21, 2014 ROW DECODER A 11 A 12 A 13 A 14 A 15 A 16 A 17 A 18 SENSE AMPS CY62157E MoBL Contents Product Portfolio ..............................................................3 Ordering Information ......................................................13 Pin Configurations ...........................................................3 Ordering Code Definitions .........................................13 Maximum Ratings .............................................................4 Package Diagrams ..........................................................14 Operating Range ...............................................................4 Acronyms ........................................................................16 Electrical Characteristics .................................................4 Document Conventions .................................................16 Capacitance ......................................................................5 Units of Measure .......................................................16 Thermal Resistance ..........................................................5 Document History Page .................................................17 AC Test Loads and Waveforms .......................................5 Sales, Solutions, and Legal Information ......................19 Data Retention Characteristics .......................................6 Worldwide Sales and Design Support .......................19 Data Retention Waveform ................................................6 Products ....................................................................19 Switching Characteristics ................................................7 PSoC Solutions .......................................................19 Switching Waveforms ......................................................8 Cypress Developer Community .................................19 Truth Table ......................................................................12 Technical Support ......................................................19 Document Number: 38-05695 Rev. *L Page 2 of 19