Cypress CY7C1231H manual Switching Characteristics Over the Operating Range 12

CY7C1231H

Switching Characteristics Over the Operating Range [12, 13]

								-133
Parameter						Description				Unit
							Min.		Max.
tPOWER	VDD(Typical) to the first Access[14]						1			ms
Clock
tCYC	Clock Cycle Time						7.5			ns
tCH	Clock HIGH						2.5			ns
tCL	Clock LOW						2.5			ns
Output Times
tCDV	Data Output Valid after CLK Rise								6.5	ns
tDOH	Data Output Hold after CLK Rise						2.0			ns
tCLZ	Clock to Low-Z[15, 16, 17]						0			ns
tCHZ	Clock to High-Z[15, 16, 17]								3.5	ns
tOEV		LOW to Output Valid							3.5	ns
	OE
tOELZ		LOW to Output Low-Z[15, 16, 17]					0			ns
	OE
tOEHZ		HIGH to Output High-Z[15, 16, 17]							3.5	ns
	OE
Set-up Times
tAS	Address Set-up before CLK Rise						1.5			ns
tALS
	ADV/LD					Set-up before CLK Rise	1.5			ns
tWES						[A:B] Set-up before CLK Rise	1.5			ns
	WE,			BW
tCENS			Set-up before CLK Rise				1.5			ns
	CEN
tDS	Data Input Set-up before CLK Rise						1.5			ns
tCES	Chip Enable Set-up before CLK Rise						1.5			ns
Hold Times
tAH	Address Hold after CLK Rise						0.5			ns
tALH
	ADV/LD				Hold after CLK Rise		0.5			ns
tWEH						[A:B] Hold after CLK Rise	0.5			ns
	WE,			BW
tCENH			Hold after CLK Rise				0.5			ns
	CEN
tDH	Data Input Hold after CLK Rise						0.5			ns
tCEH	Chip Enable Hold after CLK Rise						0.5			ns

Notes:

12.Timing reference level is 1.5V when VDDQ = 3.3V and 1.25V when VDDQ = 2.5V.

13.Test conditions shown in (a) of AC Test Loads, unless otherwise noted.

14.This part has a voltage regulator internally; tPOWER is the time that the power needs to be supplied above VDD minimum initially before a read or write operation can be initiated.

15.tCHZ, tCLZ, tOELZ, and tOEHZ are specified with AC test conditions shown in (b) of AC Test Loads. Transition is measured ± 200 mV from steady-state voltage.

16.At any given voltage and temperature, tOEHZ is less than tOELZ and tCHZ is less than tCLZ to eliminate bus contention between SRAMs when sharing the same data bus. These specifications do not imply a bus contention condition, but reflect parameters guaranteed over worst case user conditions. Device is designed to achieve tri-state prior to Low-Z under the same system conditions.

17.This parameter is sampled and not 100% tested.

Document #: 001-00207 Rev. *B Page 8 of 12

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