Cypress CY62158EV30 manual Parameter Description 45 ns Unit Min, Read Cycle, Write Cycle

CY62158EV30 MoBL→

Switching Characteristics (Over the Operating Range) [11]

Parameter			Description		45 ns		Unit
				Min		Max
Read Cycle
tRC	Read Cycle Time			45			ns
tAA	Address to Data Valid					45	ns
tOHA	Data Hold from Address Change			10			ns
tACE		1 LOW and CE2 HIGH to Data Valid				45	ns
	CE
tDOE			LOW to Data Valid			22	ns
	OE
t			LOW to Low Z[12]	5			ns
	OE
LZOE
t			HIGH to High Z[12, 13]			18	ns
	OE
HZOE
tLZCE		1 LOW and CE2 HIGH to Low Z[12]		10			ns
	CE
tHZCE		1 HIGH or CE2 LOW to High Z[12, 13]				18	ns
	CE
tPU		1 LOW and CE2 HIGH to Power Up		0			ns
	CE
tPD		1 HIGH or CE2 LOW to Power Down				45	ns
	CE
Write Cycle[14]
tWC	Write Cycle Time			45			ns
tSCE		1 LOW and CE2 HIGH to Write End		35			ns
	CE
tAW	Address Setup to Write End			35			ns
tHA	Address Hold from Write End			0			ns
tSA	Address Setup to Write Start			0			ns
tPWE			Pulse Width	35			ns
	WE
tSD	Data Setup to Write End			25			ns
tHD	Data Hold from Write End			0			ns
tHZWE			LOW to High Z[12, 13]			18	ns
	WE
tLZWE			HIGH to Low Z[12]	10			ns
	WE

Notes

11.Test conditions for all parameters other than tri-state parameters assume signal transition time of 3 ns or less (1V/ns), timing reference levels of VCC(typ)/2, input pulse levels of 0 to VCC(typ), and output loading of the specified IOL/IOH as shown in “AC Test Loads and Waveforms” on page 4.

12.At any given temperature and voltage condition, tHZCE is less than tLZCE, tHZOE is less than tLZOE, and tHZWE is less than tLZWE for any given device.

13.tHZOE, tHZCE, and tHZWE transitions are measured when the outputs enter a high impedance state.

14.The internal write time of the memory is defined by the overlap of WE, CE1 = VIL, and CE2 = VIH. All signals must be ACTIVE to initiate a write and any of these signals can terminate a write by going INACTIVE. The data input setup and hold timing should be referenced to the edge of the signal that terminates the write.

Document #: 38-05578 Rev. *D Page 5 of 11

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