Overview

The 71V3556 3.3V CMOS synchronous SRAM, organized as 128K x 36, is designed to eliminate dead bus cycles when turning the bus around between reads and writes or writes and reads. Thus, it has been given the name ZBT™, or Zero Bus Turnaround. The 71V3556 contains data I/O, address, and control signal registers.

71V3556 - Block Diagram
71V3556 - Block Diagram
  • High-performance system speed 200MHz (x18) (3.2ns Clock-to-Data access)
  • ZBT feature - No dead cycles between write and read cycles
  • Internally synchronized output buffer enable eliminates the need to control OE
  • Single R/W (Read/Write) control pin
  • Positive clock-edge triggered address, data, and control signal registers for fully pipelined applications
  • 4-word burst capability (interleaved or linear)
  • Individual byte write (BW1 - BW4) control (May tie active)
  • Three chip enables for simple depth expansion
  • 3.3V power supply (±5%), 3.3V I/O supply (VDDQ)
  • Optional- Boundary Scan JTAG interface (IEEE 1149.1 compliant)
  • Available in 100-pin TQFP, 119-pin BGA, and 165 fpBGA packages

Documentation

Design & Development

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

Explore ECAD Models
Diagram of ECAD Models

Product Options

    Processing table
    Pkg. Type
    Lead Count (#)
    Temp. Grade
    Pb (Lead) Free
    Carrier Type
    Moisture Sensitivity Level (MSL)
    Price (USD) | 1ku
    Buy / Sample
    Part Number
    71V3556SA100BQI
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    Samples Available
    		 CABGA 165 I No Tray 3 8.048 Get Samples,
    71V3556SA133BQG
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    Samples Available
    		 CABGA 165 C Yes Tray 3 9.344 Get Samples,
    71V3556SA166BGI
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    Samples Available
    		 PBGA 119 I No Tray 3 9.994 Get Samples,
    71V3556SA166BQG8
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    		CABGA 165 C Yes Reel 3
    71V3556SA166BQGI
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    		CABGA 165 I Yes Tray 3 10.18
    71V3556SA166BQGI8
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    		CABGA 165 I Yes Reel 3
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