Cypress CY7C1157V18 manual Document History, ECN No Issue Date Orig. Description of Change, Nxr

CY7C1146V18, CY7C1157V18

CY7C1148V18, CY7C1150V18

Document History Page

Document Title: CY7C1146V18/CY7C1157V18/CY7C1148V18/CY7C1150V18, 18-Mbit DDR-II+ SRAM 2-Word Burst Architecture (2.0 Cycle Read Latency)

Document Number: 001-06621

REV.	ECN No.	Issue Date	Orig. of	Description of Change
			Change
**	430351	See ECN	NXR	New data sheet
*A	461654	See ECN	NXR	Revised the MPNs from
				CY7C1157BV18 to CY7C1146V18
				CY7C1148BV18 to CY7C1157V18
				CY7C1150BV18 to CY7C1148V18
				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	497629	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 Character-
				istics table and in the note below the table
				Updated note 21 to specify Overshoot and Undershoot Spec
				Updated ΘJA and ΘJC values
				Removed x9 part and its related information
				Updated foot note 24
*C	1175245	See ECN	VKN/KKVTMP	Converted from preliminary to final
				Added x8 and x9 parts
				Updated logic block diagram for x18 and x36 parts
				Changed IDD values from 794 mA to 1020 mA for 375 MHz, 733 mA to 920 mA
				for 333 MHz, 685 mA to 850 mA for 300 MHz
				Changed ISB values from 227 mA to 290 mA for 375 MHz, 212 mA to 260 mA
				for 333 MHz, 201 mA to 250 mA for 300 MHz
				Changed tCYC(max) spec to 8.4 ns for all speed bins
				Changed ΘJA value from 13.48 °C/W to 17.2 °C/W
				Updated Ordering Information table
*D	2199066	See ECN	VKN/AESA	Added footnote# 20 related to IDD

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Document Number: 001-06621 Rev. *D Revised March 06, 2008 Page 27 of 27

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