Density 18M
Org 1Mx18
Burst 2
Status Prod
Speed Mhz 250, 300, 333
Comments Previous Revision
Configuration 1M18 = 1M x18
Speed 333 = 333MHz
Product Family 61 = QUAD/P DDR-2/P
Package Code M3 = 165-ball BGA (15 x 17 mm)
ROHS Version = Leaded
Burst Type B2 = Burst 2
Die Rev A = A
Read Latency (RL) blank = 1.5 clock cycles or 2.5 clock cycles
Product Type QD = QUAD
ODT Option blank = No ODT
Temperature Range I = Industrial (-40°C to +85°C)
Outpack Tape on Reel

IS61QDB21M18A-333M3I-TR 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 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 power supply and 1.5, 1.8V VDDQ, used with 0.75, 0.9V VREF.
  • HSTL input and output levels.
  • Registered addresses, write and read controls, byte writes, data in, and data outputs.
  • Full data coherency.
  • Boundary scan using limited set of JTAG 1149.1 functions.
  • Byte write capability.
  • Fine ball grid array (FBGA) package: 13mmx15mm and 15mmx17mm body size 165-ball (11 x 15) array
  • Read address
  • Read enable
  • Write enable
  • Byte writes
  • Data-in for early writes The following are registered on the rising edge of the K# clock:
  • Write address
  • Byte writes


The synchronous, high-performance CMOS static random access memory (SRAM) devices. These SRAMs have separate I/Os, eliminating the need for high-speed bus turnaround. The rising edge of K clock initiates the read/write operation, and all internal operations are self-timed. Refer to the.


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Description Stock Qty Available Qty Description Stock Qty Available Qty
IS61QDB21M18A-333M3I IS61QDB21M18A-300B4LI
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IS61QDB21M18A-250M3L-TR IS61QDB21M18A-333B4L-TR
IS61QDB21M18A-250M3LI 10,000 IS61QDB21M18A-333B4LI
IS61QDB21M18A-250M3LI-TR IS61QDB21M18A-333B4LI-TR
IS61QDB21M18A-300B4 IS61QDB21M18A-333M3
IS61QDB21M18A-300B4-TR IS61QDB21M18A-333M3-TR
IS61QDB21M18A-300B4I IS61QDB21M18A-333M3L 10,000
IS61QDB21M18A-300B4I-TR IS61QDB21M18A-333M3L-TR
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IS61QDB21M18A-300B4L-TR IS61QDB21M18A-333M3LI-TR