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IS61QDB251236C - 18Mb QUAD Synchronous SRAM

Download the IS61QDB251236C datasheet PDF. This datasheet also covers the IS61QDB21M18C variant, as both devices belong to the same 18mb quad synchronous sram family and are provided as variant models within a single manufacturer datasheet.

General Description

The 18Mb IS61QDB251236C and IS61QDB21M18C are synchronous, high-performance CMOS static random access memory (SRAM) devices.

These SRAMs have separate I/Os, eliminating the need for high-speed bus turnaround.

Key Features

  • 512Kx36 and 1Mx18 configuration available.
  • On-chip Delay-Locked Loop (DLL) for wide data valid window.
  • Separate independent read and write ports with concurrent read and write operations.
  • Synchronous pipeline read with EARLY write operation.
  • Double Data Rate (DDR) interface for read and write input ports.
  • Fixed 2-bit burst for read and write operations.
  • Clock stop support.
  • Two input clocks (K and K#) for address and control registering at rising ed.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (IS61QDB21M18C-ISSI.pdf) that lists specifications for multiple related part numbers.

Full PDF Text Transcription for IS61QDB251236C (Reference)

Note: Below is a high-fidelity text extraction (approx. 800 characters) for IS61QDB251236C. For precise diagrams, and layout, please refer to the original PDF.

IS61QDB21M18C IS61QDB251236C 1Mx18, 512Kx36 18Mb QUAD (Burst 2) Synchronous SRAM JANUARY 2021 FEATURES  512Kx36 and 1Mx18 configuration available.  On-chip Delay-Locked...

View more extracted text
ES  512Kx36 and 1Mx18 configuration available.  On-chip Delay-Locked Loop (DLL) for wide data valid window.  Separate independent read and write ports with concurrent read and write operations.  Synchronous pipeline read with EARLY write operation.  Double Data Rate (DDR) interface for read and write input ports.  Fixed 2-bit burst for read and write operations.  Clock stop support.  Two input clocks (K and K#) for address and control registering at rising edges only.  Two output clocks (C and C#) for data output control.  Two echo clocks (CQ and CQ#) that are delivered simultaneously with data.  +1.8V core powe

More Datasheets from ISSI (now Infineon)

Part Number Description
IS61QDB251236A 18Mb QUAD (Burst 2) Synchronous SRAM
IS61QDB21M18A 18Mb QUAD (Burst 2) Synchronous SRAM
IS61QDB21M18C 18Mb QUAD Synchronous SRAM
IS61QDB21M36 QUAD (Burst of 2) Synchronous SRAMs
IS61QDB21M36A 36Mb QUAD (Burst 2) Synchronous SRAM
IS61QDB21M36C 36Mb QUAD Synchronous SRAM
IS61QDB22M18 QUAD (Burst of 2) Synchronous SRAMs
IS61QDB22M18A 36Mb QUAD (Burst 2) Synchronous SRAM
IS61QDB22M18C 36Mb QUAD Synchronous SRAM
IS61QDB22M36 QUAD (Burst of 2) Synchronous SRAMs