Cypress CY62158E manual Parameter Description 45 ns Unit Min, Read Cycle, Write Cycle

CY62158E MoBL→

Switching Characteristics

Over the Operating Range [9]

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 [10]			5			ns
	OE
LZOE
t			HIGH to High Z [10, 11]					18	ns
	OE
HZOE
t				LOW and CE	HIGH to Low Z [10]	10			ns
	CE	1
LZCE					2
t				HIGH or CE	LOW to High Z [10, 11]			18	ns
	CE	1
HZCE				2
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 [12]
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
t			LOW to High Z [10, 11]					18	ns
	WE
HZWE
t			HIGH to Low Z [10]			10			ns
	WE
LZWE

Notes

9.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.

10.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.

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

12.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 #: 38-05684 Rev. *D Page 5 of 10

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