Cypress CY7C185 specifications Write Cycle No CE Controlled12,13,14

Page 6

CY7C185

Switching Waveforms (continued)

Write Cycle No. 2 (CE Controlled)[12,13,14]

 

tWC

 

ADDRESS

 

 

CE

tSCE1

 

1

 

 

tSA

 

 

CE2

tSCE2

 

tAW

 

tHA

WE

 

 

 

tSD

tHD

DATA I/O

DATA IN VALID

 

 

 

C185–9

Write Cycle No. 3 (WE Controlled, OE LOW)[12,13,14,15]

 

 

tWC

 

ADDRESS

 

 

 

CE

 

tSCE1

 

1

 

 

 

CE2

 

tSCE2

 

 

 

tAW

tHA

WE

tSA

 

 

 

 

 

 

 

tSD

tHD

DATA I/O

NOTE 13

DATA IN VALID

 

 

tHZWE

 

tLZWE

 

 

 

C185–10

Notes:

 

 

 

14.The minimum write cycle time for write cycle #3 (WE controlled, OE LOW) is the sum of tHZWE and tSD.

15.If CE1 goes HIGH or CE2 goes LOW simultaneously with WE HIGH, the output remains in a high-impedance state.

6

Image 6
Contents Functional Description FeaturesLogic Block Diagram Pin Configurations Selection Guide1Operating Range Electrical Characteristics Over the Operating RangeMaximum Ratings Ambient Range= GND Capacitance4AC Test Loads and Waveforms Parameter Description Test Conditions Max UnitSwitching Characteristics Over the Operating Range5 CE2Switching Waveforms Read Cycle No.19,10Write Cycle No WE Controlled10,12 Write Cycle No CE Controlled12,13,14 Write Cycle No WE Controlled, OE LOW12,13,14,15Typical DC and AC Characteristics Normalized Supply CurrentTruth Table Address DesignatorsOrdering Information Package Diagrams Lead 300-Mil Molded DIP P21Lead 300-Mil Molded Soic S21 Lead 300-Mil Molded SOJ