Cypress CY62148EV30 manual Switching Characteristics, Parameter Description Ind’l/Auto-A Unit Min

MoBL® CY62148EV30

Switching Characteristics

(Over the Operating Range) [12]

Parameter		Description	- 45 (Ind’l/Auto-A)			- 55 [1]		Unit
			Min	Max	Min		Max
Read Cycle
tRC	Read Cycle Time		45		55			ns
tAA	Address to Data Valid			45			55	ns
tOHA	Data Hold from Address Change		10		10			ns
tACE		LOW to Data Valid		45			55	ns
	CE
tDOE		LOW to Data Valid		22			25	ns
	OE
t		LOW to Low Z [13]	5		5			ns
	OE
LZOE
t		HIGH to High Z [13, 14]		18			20	ns
	OE
HZOE
t		LOW to Low Z [13]	10		10			ns
	CE
LZCE
t		HIGH to High Z [13, 14]		18			20	ns
	CE
HZCE
tPU		LOW to Power Up	0		0			ns
	CE
tPD		HIGH to Power Up		45			55	ns
	CE
Write Cycle [15]
tWC	Write Cycle Time		45		55			ns
tSCE		LOW to Write End	35		40			ns
	CE
tAW	Address Setup to Write End		35		40			ns
tHA	Address Hold from Write End		0		0			ns
tSA	Address Setup to Write Start		0		0			ns
tPWE		Pulse Width	35		40			ns
	WE
tSD	Data Setup to Write End		25		25			ns
tHD	Data Hold from Write End		0		0			ns
t		LOW to High Z [13, 14]		18			20	ns
	WE
HZWE
t		HIGH to Low Z [13]	10		10			ns
	WE
LZWE

Notes

12.Test Conditions for all parameters other than tri-state parameters assume signal transition time of 3 ns or less (1 V/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 the “AC Test Loads and Waveforms” on page 4.

13.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.

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

15.The internal write time of the memory is defined by the overlap of WE, CE = VIL. 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 must be referenced to the edge of the signal that terminates the write.

Document #: 38-05576 Rev. *G Page 5 of 12

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