Cypress CY7C1277V18 Document History, ECN No Issue Date Orig. Description of Change, Nxr, Vkn

CY7C1266V18, CY7C1277V18

CY7C1268V18, CY7C1270V18

Document History Page

Document Title: CY7C1266V18/CY7C1277V18/CY7C1268V18/CY7C1270V18, 36-Mbit DDR-II+ SRAM 2-Word Burst Architecture (2.5 Cycle Read Latency)

Document Number: 001-06347

REV.	ECN No.	Issue Date	Orig. of	Description of Change
			Change
**	425689	See ECN	NXR	New Data Sheet
*A	461639	See ECN	NXR	Revised the MPN’s from
				CY7C1277AV18 to CY7C1277V18
				CY7C1268AV18 to CY7C1268V18
				CY7C1270AV18 to CY7C1270V18
				Changed tTH and tTL from 40 ns to 20 ns, changed tTMSS, tTDIS, tCS, tTMSH,
				tTDIH, tCH from 10 ns to 5 ns and changed tTDOV from 20 ns to 10 ns in TAP
				AC Switching Characteristics table
				Modified Power-Up waveform
*B	497628	See ECN	NXR	Changed the VDDQ operating voltage to 1.4V to VDD in the Features section,
				in Operating Range table and in the DC Electrical Characteristics table
				Added foot note in page# 1
				Changed the Maximum rating of Ambient Temperature with Power Applied
				from –10°C to +85°C to –55°C to +125°C
				Changed VREF (Max.) spec from 0.85V to 0.95V in the DC Electrical
				Characteristics table and in the note below the table
				Updated foot note# 17 to specify Overshoot and Undershoot Spec
				Updated ΘJA and ΘJC values
				Removed x9 part and its related information
				Updated footnote #24
*C	1093183	See ECN	VKN	Converted from preliminary to final
				Added x8 and x9 parts
				Updated logic block diagram for x18 and x36 parts
				Changed IDD values from 1080 mA to 1280 mA for 400 MHz, 980 mA to
				1210 mA for 375 MHz, 880 mA to 1080 mA for 333 MHz, 830 mA to 1000
				mA for 300 MHz
				Changed ISB values from 300 mA to 320 mA for 375 MHz, 275 mA to 300
				mA for 333 MHz, 250 mA to 290 mA for 300 MHz
				Changed ΘJA value from 12.43 °C/W to 16.25 °C/W
				Changed tCYC max spec to 8.4 ns for all speed bins
				Updated Ordering Information table
*D	2198506	See ECN	VKN/AESA	Added footnote# 19 related to IDD

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Document Number: 001-06347 Rev. *D Revised March 11, 2008 Page 27 of 27

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