CY7C149-45PC Cypress Semiconductor Corp, CY7C149-45PC Datasheet
CY7C149-45PC
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CY7C149-45PC Summary of contents
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... Cypress Semiconductor Corporation Document #: 38-05059 Rev. *B Functional Description The CY7C148 is a high-performance CMOS static RAMs organized as 1024 by 4 bits. Easy memory expansion is provided by an active LOW chip select (CS) input and three-state outputs. The CY7C148 remains in a low-power mode as long as the device remains unselected; i.e., (CS) is HIGH, thus reducing the average power requirements of the device ...
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Pin Configuration GND 9 Selection Guide Description Maximum Access Time (ns) Maximum Operating Current (mA) Maximum Standby Current ...
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Maximum Ratings Exceeding the maximum ratings may impair the useful life of the device. These user guidelines are not tested. Storage Temperature 65C to+150C Ambient Temperature with Power Applied55C to+125C Supply Voltage to Ground Potential (Pin 18 to Pin 9) ...
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... AC Test Loads. 7. The internal write time of the memory is defined by the overlap of CS LOW and WE LOW. Both signals must be LOW to initiate a write and either signal can terminate a write by going high. The data input set-up and hold timing should be referenced to the rising edge of the signal that terminates the write ...
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Switching Waveforms [8,9] Read Cycle No. 1 ADDRESS DATA OUT PREVIOUS DATA VALID [8,10] Read Cycle No ACS t LZ HIGH IMPEDANCE DATA OUT SUPPLY CURRENT Write Cycle No. 1 (WE Controlled) ADDRESS ...
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Switching Waveforms (continued) [11] Write Cycle No. 2 (CSControlled) ADDRESS CS WE DATA IN DATA OUT DATA UNDEFINED Note: 11 goes HIGH simultaneously with WE HIGH, the output remains in a high-impedance state. Document #: 38-05059 Rev. *B ...
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Typical DC and AC Characteristics NORMALIZED SUPPLY CURRENT vs.SUPPLY VOLTAGE 1.4 1 1.0 0.8 V =5. =25°C A 0.6 0.4 0 0.0 4.0 4.5 5.0 5.5 6.0 SUPPLY VOLTAGE(V) NORMALIZED ACCESS TIME vs.SUPPLY VOLTAGE ...
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Typical DC and AC Characteristics TYPICAL POWER–ON CURRENT vs.SUPPLY VOLTAGE(7C148) 3.0 2.5 T =25° CSPULL–UP 2.0 RESISTORTOV CC 1.5 ISB 1.0 0.5 0.0 0.0 1.0 2.0 3.0 4.0 5.0 SUPPLY VOLTAGE(V) Ordering Information Speed Package (ns) Ordering ...
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Figure 1. 18-Lead (300-Mil) Molded DIP P3 Document #: 38-05059 Rev. *B CY7C148 51-85010 *C Page [+] Feedback ...
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... DC Electrical Characteristics table OS Removed 18-pin (300-mil) CerDIP and 18-pin Rectangular Leadless Chip Carrier packages Updated ordering Information Table PRAS Removed inactive part CY7C149-45PC from all places it appeared. Added Ordering Code Definition Updated Package Diagram cypress.com/go/plc Revised October 7, 2010 CY7C148 ...