CY7C199D 256-Kbit (32 K 8) Static RAM 256-Kbit (32 K 8) Static RAM Features Functional Description Temperature ranges The CY7C199D is a high performance CMOS static RAM 40 C to 85 C organized as 32,768 words by 8-bits. Easy memory expansion is provided by an active LOW chip enable (CE), an active LOW Pin and function compatible with CY7C199C output enable (OE) and tri-state drivers. This device has an High speed automatic power-down feature, reducing the power consumption t = 10 ns when deselected. The input and output pins (I/O through I/O ) AA 0 7 are placed in a high impedance state when the device is Low active power deselected (CE HIGH), the outputs are disabled (OE HIGH), or I = 80 mA at 10 ns CC during a write operation (CE LOW and WE LOW). Low CMOS standby power Write to the device by taking chip enable (CE) and write enable I = 3 mA SB2 (WE) inputs LOW. Data on the eight I/O pins (I/O through I/O ) 0 7 2.0 V data retention is then written into the location specified on the address pins (A 0 through A ). Automatic power-down when deselected 14 Read from the device by taking chip enable (CE) and output Complementary metal oxide semiconductor (CMOS) for enable (OE) LOW while forcing write enable (WE) HIGH. Under optimum speed/power these conditions, the contents of the memory location specified Transistor-transistor logic (TTL) compatible inputs and outputs by the address pins appears on the I/O pins. Easy memory expansion with CE and OE features The CY7C199D device is suitable for interfacing with processors that have TTL I/P levels. It is not suitable for processors that Available in Pb-free 28-pin 300-Mil-wide molded small outline require CMOS I/P levels. Please see Electrical Characteristics J-lead package (SOJ) and 28-pin thin small outline package on page 4 for more details and suggested alternatives. (TSOP) I packages Logic Block Diagram I/O 0 I/O 1 I/O 2 I/O 3 I/O 4 I/O 5 I/O 6 I/O 7 Cypress Semiconductor Corporation 198 Champion Court San Jose, CA 95134-1709 408-943-2600 Document Number: 38-05471 Rev. *J Revised June 19, 2013CY7C199D Contents Pin Configurations ...........................................................3 Ordering Information ...................................................... 10 Selection Guide ................................................................3 Ordering Code Definitions ......................................... 10 Maximum Ratings .............................................................4 Package Diagrams .......................................................... 11 Operating Range ...............................................................4 Acronyms ........................................................................13 Electrical Characteristics .................................................4 Document Conventions ................................................. 13 Capacitance ......................................................................5 Units of Measure ....................................................... 13 Thermal Resistance ..........................................................5 Document History Page ................................................. 14 AC Test Loads and Waveforms .......................................5 Sales, Solutions, and Legal Information ...................... 15 Data Retention Characteristics .......................................6 Worldwide Sales and Design Support ....................... 15 Data Retention Waveform ................................................6 Products ....................................................................15 Switching Characteristics ................................................7 PSoC Solutions ...................................................... 15 Switching Waveforms ......................................................8 Cypress Developer Community ................................. 15 Truth Table ......................................................................10 Technical Support ..................................................... 15 Document Number: 38-05471 Rev. *J Page 2 of 15