AN4011 - Choosing The Right Cypress Synchronous SRAM | Cypress Semiconductor

AN4011 - Choosing The Right Cypress Synchronous SRAM

Last Updated:

May 28, 2020

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AN4011 provides an overview of Standard Synchronous, NoBL¿, QDR®-II/II+, QDR-II+ Xtreme, DDR-II/II+, DDR-II+ Xtreme and QDR-IV SRAM's. Cypress currently manufactures several major Synchronous SRAM architectures. The purpose of this application note is to provide a means to determine which architecture is right for a particular application. A brief description of each architecture and comparison by address/data relationships and performance characteristics is also included.

AN4011 provides an overview of Standard Synchronous, NoBL, QDR®-II/II+, QDR-II+ Xtreme, DDR-II/II+, DDR-II+ Xtreme and QDR-IV SRAM's. Cypress currently manufactures several major Synchronous SRAM architectures. The purpose of this application note is to provide a means to determine which architecture is right for a particular application. A brief description of each architecture and comparison by address/data relationships and performance characteristics is also included.

The purpose of this application note is to provide a means to determine which architecture is right for a particular application. A brief description of each architecture and comparison by address/data relationships and performance characteristics is also included.

The table below shows the architecture comparison for the different options:

Parameter	Std. Sync	NoBL^TM	DDR-II/DDR-II+	QDR^TM-II/ QDR^TM-II+
Data Rate	Single	Single	Double	Double
Data Bus	Common I/O	Common I/O	Common and Separate I/O	Separate I/O
V_DD	3.3V/2.5V	3.3V/2.5V	1.8V	1.8V
V_DDQ	LVTTL 3.3V/2.5V	LVTTL 3.3V/3.5V	HSTL (1.5V/1.8V)	HSTL (1.5V/1.8V)
Clock Frequency	250 MHz	250 MHz	333 MHz / 550 MHz	333 MHz / 550 MHz

Translated documents are for reference only. We recommend that you refer to the English-language version of a document if you are engaged in development of a design.

Related Files

File Title	Language	Size	Last Updated
AN4011 Choosing The Right Cypress Synchronous SRAM.pdf	English	663.16 KB	05/26/2020
AN4011 Choosing The Right Cypress Synchronous SRAM (Chinese).pdf	Chinese	723.24 KB	08/18/2015
AN4011 Choosing The Right Cypress Synchronous SRAM (Japanese).pdf	Japanese	814.64 KB	08/18/2015

Related Resources

Datasheets
CY7C1328G: 4-Mbit (256 K × 18) Pipelined DCD Sync SRAM	11/20/2016
CY7C1470V33, CY7C1472V33, CY7C1474V33: 72-Mbit (2 M × 36/4 M × 18/1 M × 72) Pipelined SRAM with NoBL™ Architecture	04/30/2019
CY7C1471V25: 72-Mbit (2 M × 36) Flow-Through SRAM with NoBL™ Architecture	11/21/2016
CY7C1480V33: 72-Mbit (2M x 36) Pipelined Sync SRAM	09/06/2017
CY7C1471V33: 72-Mbit (2 M × 36) Flow-through SRAM with NoBL™ Architecture	02/15/2018
CY7C1470V25, CY7C1472V25, CY7C1474V25: 72-Mbit (2 M × 36/4 M × 18/1 M × 72) Pipelined SRAM with NoBL™ Architecture	01/29/2018
CY7C1441AV33: 36-Mbit (1 M x 36) Flow-Through SRAM	08/21/2015
CY7C1461AV33, CY7C1463AV33: 36-Mbit (1 M × 36/2 M × 18) Flow-Through SRAM with NoBL™ Architecture	07/28/2016
CY7C1351G: 4-Mbit (128 K × 36) Flow-through SRAM with NoBL™ Architecture	01/29/2018
CY7C1353G: 4-Mbit (256 K × 18) Flow-Through SRAM with NoBL™ Architecture	04/30/2019
CY7C1327G: 4-Mbit (256 K × 18) Pipelined Sync SRAM	11/21/2016
CY7C1352G: 4-Mbit (256 K × 18) Pipelined SRAM with NoBL™ Architecture	11/21/2016
CY7C1350G: 4-Mbit (128 K × 36) Pipelined SRAM with NoBL™ Architecture	05/13/2019
CY7C1345G: 4-Mbit (128 K × 36) Flow-Through Sync SRAM	11/21/2016
CY7C1338G: 4-Mbit (128 K × 32) Flow-Through Sync SRAM	11/21/2016
CY7C1325G: 4-Mbit (256 K × 18) Flow-Through Sync SRAM	11/21/2016
CY7C1360C, CY7C1362C: 9-Mbit (256 K × 36/512 K × 18) Pipelined SRAM	04/30/2019
CY7C1366C, CY7C1367C: 9-Mbit (256 K × 36/512 K × 18) Pipelined DCD Sync SRAM	04/30/2019
CY7C1354CV25, CY7C1356CV25: 9-Mbit (256 K × 36/512 K × 18) Pipelined SRAM with NoBL™ Architecture	05/13/2019
CY7C1355C, CY7C1357C: 9-Mbit (256 K × 36 / 512 K × 18) Flow-Through SRAM with NoBL™ Architecture	01/29/2018
CY7C1380D, CY7C1380F, CY7C1382D: 18-Mbit (512 K × 36/1 M × 18) Pipelined SRAM	03/30/2016
CY7C1381D, CY7C1383D, CY7C1383F: 18-Mbit (512 K × 36/1 M × 18) Flow-Through SRAM	06/19/2017
CY7C1302DV25: 9-Mbit Burst of Two Pipelined SRAMs with QDR™ Architecture	11/30/2017
CY7C1329H: 2-Mbit (64K x 32) Pipelined Sync SRAM	01/31/2018
CY7C1354C, CY7C1356C: 9-Mbit (256 K × 36/512 K × 18) Pipelined SRAM with NoBL Architecture	04/09/2018
CY7C1470BV25, CY7C1472BV25: 72-Mbit (2 M × 36/4 M × 18) Pipelined SRAM with NoBL™ Architecture	02/15/2018
CY7C1470BV33, CY7C1472BV33, CY7C1474BV33: 72-Mbit (2 M × 36/4 M × 18/1 M × 72) Pipelined SRAM with NoBL™ Architecture	02/15/2018
CY7C1471BV25: 72-Mbit (2 M × 36) Flow-Through SRAM with NoBL Architecture	05/19/2016
CY7C1480BV25: 72-Mbit (2 M × 36) Pipelined Sync SRAM	06/24/2016
CY7C1471BV33, CY7C1473BV33: 72-Mbit (2 M × 36/4 M × 18) Flow-Through SRAM with NoBL™ Architecture	01/29/2018
CY7C1361C, CY7C1363C: 9-Mbit (256 K × 36/512 K × 18) Flow-Through SRAM	04/30/2019
CY7C1339G: 4-Mbit (128 K × 32) Pipelined Sync SRAM	11/21/2016
CY7C1347G: 4-Mbit (128 K × 36) Pipelined Sync SRAM	04/22/2019
CY7C1526KV18, CY7C1513KV18, CY7C1515KV18: 72-Mbit QDR® II SRAM Four-Word Burst Architecture	11/20/2017
CY7C1518KV18, CY7C1520KV18: 72-Mbit DDR II SRAM Two-Word Burst Architecture	02/13/2018
CY7C1565KV18: 72-Mbit QDR® II+ SRAM Four-Word Burst Architecture (2.5 Cycle Read Latency)	11/30/2017
CY7C1525KV18, CY7C1512KV18, CY7C1514KV18: 72-Mbit QDR® II SRAM Two-Word Burst Architecture	01/29/2018
CY7C1480BV33, CY7C1482BV33: 72-Mbit (2 M × 36/4 M × 18) Pipelined Sync SRAM	03/07/2018
CY7C1568KV18, CY7C1570KV18: 72-Mbit DDR II+ SRAM Two-Word Burst Architecture (2.5 Cycle Read Latency)	03/15/2016
CY7C1310JV18, CY7C1910JV18, CY7C1312JV18, CY7C1314JV18: 18-Mbit QDR® II SRAM 2-Word Burst Architecture	05/28/2020
CY7C1548KV18, CY7C1550KV18: 72-Mbit DDR II+ SRAM Two-Word Burst Architecture (2.0 Cycle Read Latency)	01/29/2018
CY7C1543KV18, CY7C1545KV18: 72-Mbit QDR® II+ SRAM Four-Word Burst Architecture (2.0 Cycle Read Latency)	01/29/2018
CY7C15632KV18, 72-Mbit QDR(R) II+ SRAM Four-Word Burst Architecture (2.5 Cycle Read Latency)	05/28/2020
CY7C1523KV18: 72-Mbit DDR II SIO SRAM Two-Word Burst Architecture	01/29/2018
CY7C1521KV18, 72-Mbit DDR II SRAM Four-Word Burst Architecture	11/30/2017
CY7C1248KV18, CY7C1250KV18: 36-Mbit DDR II+ SRAM Two-Word Burst Architecture (2.0 Cycle Read Latency)	01/29/2018
CY7C1411KV18, CY7C1426KV18, CY7C1413KV18, CY7C1415KV18 : 36-Mbit QDR® II SRAM Four-Word Burst Architecture	11/28/2017
CY7C2263KV18, CY7C2265KV18: 36-Mbit QDR® II+ SRAM Four-Word Burst Architecture (2.5 Cycle Read Latency) with ODT	01/06/2016
CY7C2268KV18, CY7C2270KV18: 36-Mbit DDR II+ SRAM Two-Word Burst Architecture (2.5 Cycle Read Latency) with ODT	05/28/2020
CY7C1425KV18, CY7C1412KV18, CY7C1414KV18: 36-Mbit QDR® II SRAM Two-Word Burst Architecture	01/29/2018
CY7C1418KV18, CY7C1420KV18: 36-Mbit DDR II SRAM Two-Word Burst Architecture	01/29/2018
CY7C1268KV18, CY7C1270KV18: 36-Mbit DDR II+ SRAM Two-Word Burst Architecture (2.5 Cycle Read Latency)	11/29/2017
CY7C1423KV18/CY7C1424KV18, 36-Mbit DDR II SIO SRAM Two-Word Burst Architecture	01/29/2018
CY7C1243KV18/CY7C1245KV18, 36-Mbit QDR® II+ SRAM Four-Word Burst Architecture (2.0 Cycle Read Latency)	02/13/2018
CY7C1263KV18/CY7C1265KV18, 36-Mbit QDR® II+ SRAM Four-Word Burst Architecture (2.5 Cycle Read Latency)	01/29/2018
CY7C1312KV18, CY7C1314KV18 18-Mbit QDR® II SRAM Two-Word Burst Architecture	11/30/2017
CY7C1311KV18, CY7C1911KV18, CY7C1313KV18, CY7C1315KV18: 18-Mbit QDR® II SRAM Four-Word Burst Architecture	02/13/2018
CY7C1318KV18, CY7C1320KV18: 18-Mbit DDR II SRAM Two-Word Burst Architecture	01/29/2018
CY7C1319KV18, CY7C1321KV18: 18-Mbit DDR II SRAM Four-Word Burst Architecture	01/29/2018
CY7C1392KV18, CY7C1393KV18: 18-Mbit DDR II SIO SRAM Two-Word Burst Architecture	01/29/2018
CY7C1163KV18, CY7C1165KV18: 18-Mbit QDR® II+ SRAM Four-Word Burst Architecture (2.5 Cycle Read Latency)	01/29/2018
CY7C1143KV18, CY7C1145KV18: 18-Mbit QDR® II+ SRAM Four-Word Burst Architecture (2.0 Cycle Read Latency)	02/03/2016
CY7C2163KV18/CY7C2165KV18, 18-MBIT QDR(R) II+ SRAM FOUR-WORD BURST ARCHITECTURE (2.5 CYCLE READ LATENCY) WITH ODT	05/28/2020
CY7C1148KV18, CY7C1150KV18: 18-Mbit DDR II+ SRAM Two-Word Burst Architecture (2.0 Cycle Read Latency)	01/29/2018
CY7C1168KV18, CY7C1170KV18: 18-Mbit DDR II+ SRAM Two-Word Burst Architecture (2.5 Cycle Read Latency)	01/29/2018
CY7C2168KV18, CY7C2170KV18: 18-Mbit DDR II+ SRAM Two-Word Burst Architecture (2.5 Cycle Read Latency) with ODT	01/29/2018
CY7C25682KV18, CY7C25702KV18: 72-Mbit DDR II+ SRAM Two-Word Burst Architecture (2.5 Cycle Read Latency) with ODT	03/15/2016
CY7C25442KV18: 72-Mbit QDR® II+ SRAM Two-Word Burst Architecture (2.0 Cycle Read Latency) with ODT	11/28/2017
CY7C25632KV18, CY7C25652KV18: 72-Mbit QDR®II+ SRAM Four-Word Burst Architecture (2.5 Cycle Read Latency) with ODT	11/30/2017
CY7C1623KV18: 144-Mbit DDR-II SIO SRAM Two-Word Burst Architecture	05/28/2020
CY7C1643KV18/CY7C1645KV18, 144-Mbit QDR® II+ SRAM Four-Word Burst Architecture (2.0 Cycle Read Latency)	11/29/2017
CY7C1648KV18, CY7C1650KV18: 144-Mbit DDR II+ SRAM Two-Word Burst Architecture (2.0 Cycle Read Latency)	01/29/2018
CY7C1663KV18/CY7C1665KV18, 144-Mbit QDR® II+ SRAM Four-Word Burst Architecture (2.5 Cycle Read Latency)	01/29/2018
CY7C2663KV18, CY7C2665KV18: 144-Mbit QDR® II+ SRAM Four-Word Burst Architecture (2.5 Cycle Read Latency) with ODT	11/27/2017
CY7C2642KV18, CY7C2644KV18: 144-Mbit QDR® II+ SRAM Two-Word Burst Architecture (2.0 Cycle Read Latency) with ODT	01/08/2016
CY7C1613KV18/CY7C1615KV18, 144-MBIT QDR® II SRAM FOUR-WORD BURST ARCHITECTURE	01/29/2018
CY7C1618KV18, CY7C1620KV18: 144-Mbit DDR II SRAM Two-Word Burst Architecture	12/03/2017
CY7C2670KV18: 144-Mbit DDR II+ SRAM Two-Word Burst Architecture (2.5 Cycle Read Latency) with ODT	01/29/2018
CY7C1625KV18, CY7C1612KV18, CY7C1614KV18: 144-Mbit QDR® II SRAM Two-Word Burst Architecture	02/15/2018
CY7C1481BV33: 72-Mbit (2 M × 36) Flow-Through SRAM	05/26/2020
CY7C1364CV33: 9-Mbit (256 K × 32) Pipelined Sync SRAM	08/25/2015
CY7C1440AV25, CY7C1446AV25: 36-Mbit (1 M × 36/512 K × 72) Pipelined Sync SRAM	01/08/2016
CY7C1380DV33/CY7C1382DV33, 18-MBIT (512 K X 36/1 M X 18) PIPELINED SRAM	01/05/2016
CY7C1460BV25, CY7C1462BV25: 36-Mbit (1 M × 36/2 M × 18) Pipelined SRAM with NoBL™ Architecture	01/06/2016
CY7C1371DV33: 18-Mbit (512 K × 36) Flow-Through SRAM with NoBL™ Architecture	03/11/2016
CY7C1441AV25, CY7C1447AV25: 36-Mbit (1 M × 36/512 K × 72) Flow-Through SRAM	03/09/2016
CY7C1463BV33: 36-Mbit (2 M × 18) Flow-Through SRAM with NoBL™ Architecture	01/11/2016
CY7C2563XV18, CY7C2565XV18: 72-Mbit QDR® II+ Xtreme SRAM Four-Word Burst Architecture (2.5 Cycle Read Latency) with ODT	11/27/2017
CY7C1562XV18, CY7C1564XV18: 72-Mbit QDR® II+ Xtreme SRAM Two-Word Burst Architecture (2.5 Cycle Read Latency)	01/29/2018
CY7C1568XV18, CY7C1570XV18: 72-Mbit DDR II+ Xtreme SRAM Two-Word Burst Architecture (2.5 Cycle Read Latency)	01/29/2018
CY7C2562XV18, CY7C2564XV18: 72-Mbit QDR® II+ Xtreme SRAM Two-Word Burst Architecture (2.5 Cycle Read Latency) with ODT	09/03/2017
CY7C1563XV18, CY7C1565XV18: 72-Mbit QDR® II+ Xtreme SRAM Four-Word Burst Architecture (2.5 Cycle Read Latency)	01/29/2018
CY7C2568XV18, CY7C2570XV18: 72-Mbit DDR II+ Xtreme SRAM Two-Word Burst Architecture (2.5 Cycle Read Latency) with ODT	08/27/2015
CY7C1262XV18, CY7C1264XV18: 36-Mbit QDR® II+ Xtreme SRAM Two-Word Burst Architecture (2.5 Cycle Read Latency)	05/28/2020
CY7C1263XV18, CY7C1265XV18: 36-Mbit QDR® II+ Xtreme SRAM Four-Word Burst Architecture (2.5 Cycle Read Latency)	05/28/2020
CY7C1268XV18, CY7C1270XV18: 36-Mbit DDR II+ Xtreme SRAM Two-Word Burst Architecture (2.5 Cycle Read Latency)	05/28/2020
CY7C2262XV18/CY7C2264XV18, 36-Mbit QDR(R) II+ Xtreme SRAM Two-Word Burst Architecture (2.5 Cycle Read Latency) with ODT	05/28/2020
CY7C2263XV18, CY7C2265XV18: 36-Mbit QDR® II+ Xtreme SRAM Four-Word Burst Architecture (2.5 Cycle Read Latency) with ODT	05/28/2020
CY7C2268XV18/CY7C2270XV18, 36-MBIT DDR II+ XTREME SRAM TWO-WORD BURST ARCHITECTURE (2.5 CYCLE READ LATENCY) WITH ODT	05/28/2020
CY7C1668KV18, CY7C1670KV18: 144-Mbit DDR II+ SRAM Two-Word Burst Architecture (2.5 Cycle Read Latency)	12/03/2017
CY7C1384D: 18-Mbit (512 K × 32) Pipelined SRAM	01/08/2016
CY7C1385D, 18-MBIT (512 K X 32) FLOW-THROUGH SRAM	01/05/2016
CY7C1481BV25: 72-Mbit (2 M × 36) Flow-Through SRAM	05/28/2020
CY7C1484BV25: 72-Mbit (2 M × 36) Pipelined DCD Sync SRAM	01/08/2016
CYRS1542AV18, CYRS1544AV18: 72-Mbit QDR® II+ SRAM Two-Word Burst Architecture with RadStop™ Technology	05/28/2020
CYRS1543AV18, CYRS1545AV18: 72-Mbit QDR® II+ SRAM Four-Word Burst Architecture with RadStop™ Technology	05/28/2020
CY7C1325H: 4-Mbit (256 K × 18) Flow-Through Sync SRAM	07/17/2016
CY7C1363D: 9-Mbit (512 K × 18) Flow-Through SRAM	07/17/2016
CY7C2245KV18: 36-Mbit QDR® II+ SRAM Four-Word Burst Architecture (2.0 Cycle Read Latency) with ODT	05/30/2020
CY7C1354D: 9-Mbit (256 K × 36) Pipelined SRAM with NoBL™ Architecture	05/30/2020
CY7C4122KV13, CY7C4142KV13: 144-Mbit QDR-IV XP SRAM	05/03/2017
CY7C4121KV13, CY7C4141KV13: 144-Mbit QDR™-IV HP SRAM	08/15/2017
CY7C4022KV13/CY7C4042KV13, 72-Mbit QDR™-IV XP SRAM	08/15/2017
CY7C4021KV13, CY7C4041KV13: 72-Mbit QDR™-IV HP SRAM	08/15/2017
CY7C25422KV18: 72-Mbit QDR® II+ SRAM Two-Word Burst Architecture (2.0 Cycle Read Latency) with ODT	01/29/2018