AN4011 - Choosing The Right Cypress Synchronous SRAM | Cypress Semiconductor

AN4011 - Choosing The Right Cypress Synchronous SRAM

Last Updated:

Mar 02, 2021

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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

Dear valued customer,

Thank you for choosing our products. They come with all the know-how and passion that our engineers have put into it. As you probably already know, Cypress is now Infineon. This is a major step for our company, but also for the good of you.

Reliability and business continuity are of utmost importance for us. Hence, we remain fully committed to honoring existing customer and distributor relationships. This includes offering the legacy Cypress product portfolio. We thank you very much for your trusting support.

For the full version of this message, please download the PDF version.

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	681.36 KB	03/02/2021
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	06/09/2020
CY7C1471V25: 72-Mbit (2 M × 36) Flow-Through SRAM with NoBL™ Architecture	11/21/2016
CY7C1480V33: 72-Mbit (2M x 36) Pipelined Sync SRAM	01/06/2021
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	06/09/2020
CY7C1441AV33: 36-Mbit (1 M x 36) Flow-Through SRAM	06/09/2020
CY7C1461AV33, CY7C1463AV33: 36-Mbit (1 M × 36/2 M × 18) Flow-Through SRAM with NoBL™ Architecture	06/09/2020
CY7C1351G: 4-Mbit (128 K × 36) Flow-through SRAM with NoBL™ Architecture	06/09/2020
CY7C1353G: 4-Mbit (256 K × 18) Flow-Through SRAM with NoBL™ Architecture	06/09/2020
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	06/08/2020
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 (256K X 36/512K X 18) PIPELINED SRAM	06/08/2020
CY7C1366C, CY7C1367C: 9-Mbit (256 K × 36/512 K × 18) Pipelined DCD Sync SRAM	06/09/2020
CY7C1354CV25, CY7C1356CV25: 9-Mbit (256 K × 36/512 K × 18) Pipelined SRAM with NoBL™ Architecture	06/08/2020
CY7C1355C, CY7C1357C: 9-Mbit (256 K × 36 / 512 K × 18) Flow-Through SRAM with NoBL™ Architecture	06/08/2020
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	05/30/2021
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	06/08/2020
CY7C1339G: 4-Mbit (128 K × 32) Pipelined Sync SRAM	11/21/2016
CY7C1347G: 4-Mbit (128 K × 36) Pipelined Sync SRAM	06/09/2020
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	05/30/2021
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	05/30/2021
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	05/30/2021
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	01/06/2021
CY7C1481BV33: 72-Mbit (2 M × 36) Flow-Through SRAM	05/26/2020
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)	05/30/2021
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	11/04/2020
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