Cypress CY62138EV30 Switching Characteristics Over the Operating Range9, Switching Waveforms

CY62138EV30

MoBL®

Switching Characteristics (Over the Operating Range)[9]

				45 ns
Parameter		Description				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		LOW to Data Valid			45	ns
	CE
tDOE		LOW to Data Valid			22	ns
	OE
tLZOE		LOW to Low Z[10]	5			ns
	OE
tHZOE		HIGH to High Z[10,11]			18	ns
	OE
tLZCE		LOW to Low Z[10]	10			ns
	CE
t		HIGH to High Z[10, 11]			18	ns
	CE
HZCE
tPU		LOW to Power-up	0			ns
	CE
tPD		HIGH to Power-up			45	ns
	CE
Write Cycle[12]
tWC	Write Cycle Time		45			ns
tSCE		LOW to Write End	35			ns
	CE
tAW	Address Set-up to Write End		35			ns
tHA	Address Hold from Write End		0			ns
tSA	Address Set-up to Write Start		0			ns
tPWE		Pulse Width	35			ns
	WE
tSD	Data Set-up 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

Switching Waveforms

Read Cycle No. 1 (Address Transition Controlled)[13, 14]

ADDRESS

tOHA

tRC

tAA

DATA OUT PREVIOUS DATA VALID

Notes:

DATA VALID

9. Test Conditions for all parameters other than three-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” section.

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 output enter a high-impedance state.

12.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 set-up and hold timing should be referenced to the edge of the signal that terminates the write.

13.Device is continuously selected. OE, CE = VIL.

14.WE is HIGH for read cycle.

Document #: 38-05577 Rev. *A Page 5 of 9

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