M12L64322A-7BG2S

The M12L64322A-7BG2S is a synchronous DRAM organized as 4 × 524,288 words by 32 bits (67,108,864 bits / 67.11 Mbit). It implements a four-bank SDRAM architecture with JEDEC-standard 3.3V power supply and LVTTL-compatible inputs sampled on the positive edge of the system clock.

Designed for high-bandwidth, high-performance memory system applications, this device provides programmable burst length and latencies, selectable CAS latency, and a range of operating characteristics that support precise cycle control and predictable transaction timing at up to 143 MHz.

Key Features

• Memory Organization — 512K × 32 organization presented as 4 banks (4 × 524,288 × 32) for parallel bank operation and higher throughput potential.
• Performance — Rated for 143 MHz operation with an access time of 6 ns and a write cycle time (word/page) of 14 ns to support synchronous, clocked memory transactions.
• Programmable Timing and Burst — Supports CAS latency options of 2 and 3, and programmable burst lengths (1, 2, 4, 8 and full page) with sequential and interleave burst types.
• Interface and Control — LVTTL compatible inputs with all inputs sampled on the positive-going clock edge; supports MRS cycle programming, bank address (BA0/BA1), and standard SDRAM command signals (CLK, CKE, CS, RAS, CAS).
• Data Mask and Refresh — DQM masking for byte/bit masking, auto and self-refresh capability, and a 64 ms refresh period (4K cycle) for data integrity in volatile memory.
• Power and Voltage — JEDEC-standard 3.3V operation with a supply range of 3.0 V to 3.6 V.
• Package and Mounting — 90-ball BGA package (surface mount) suitable for compact board designs; commercial temperature grade with operating range 0 °C to 70 °C.
• Compliance — JEDEC-qualified device and RoHS compliant.

Typical Applications

• High-bandwidth memory subsystems — Useful in designs that require synchronous DRAM with programmable latencies and burst control for predictable, clocked data transfers.
• Performance-focused embedded systems — Suited to embedded designs that need a 3.3V JEDEC SDRAM with four-bank operation and DQM masking.
• System designs requiring standard-compliant SDRAM — Applicable where JEDEC qualification and standard SDRAM feature set (auto/self refresh, MRS programming) are required.

Unique Advantages

• JEDEC-standard 3.3V compatibility — Simplifies integration into systems designed around the JEDEC SDRAM power standard (3.0 V–3.6 V).
• Flexible performance tuning — Programmable CAS latency and selectable burst lengths let designers trade latency vs. throughput to match system requirements.
• Four-bank architecture — Enables concurrent bank operation and improved effective bandwidth for burst-oriented access patterns.
• Compact BGA package — 90-ball BGA surface-mount package supports space-constrained PCB layouts while maintaining standard SDRAM pinout options.
• Built-in refresh and masking — Auto/self-refresh and DQM masking provide practical features for maintaining data integrity and selective data operations.
• Regulatory and supplier alignment — JEDEC qualification and RoHS compliance support interoperability and environmental requirements.

Why Choose M12L64322A-7BG2S?

The M12L64322A-7BG2S positions itself as a JEDEC-standard synchronous DRAM option for designs that require predictable, clock-synchronous memory behavior with flexible timing control. Its combination of four-bank organization, programmable burst and latency options, and support for standard SDRAM commands makes it suitable for high-bandwidth, high-performance memory subsystems operating at up to 143 MHz.

With a 90-ball BGA surface-mount package, 3.0–3.6 V supply range, and commercial temperature rating (0 °C to 70 °C), this SDRAM is targeted at engineers and procurement teams building systems that need standardized performance, refresh control, and regulatory compliance from a JEDEC-qualified memory device.

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