Renesas UPD44324362BF5-E33-FQ1-A

Overview

UPD44324362BF5-E33-FQ1-A from Renesas Electronics is a 1,048,576-word × 36-bit synchronous double data rate (DDR) SRAM with pipelined burst operation, HSTL interface, and 1.8 V core supply. It delivers 300 MHz clock frequency (3.3 ns cycle time), supports two-word linear burst reads/writes, and integrates PLL-based output timing control for precise flight-time matching. It is used in high-speed networking buffers and FPGA co-processor memory subsystems requiring low-latency, wide-data-width storage.

For engineers reviewing the UPD44324362BF5-E33-FQ1-A datasheet, UPD44324362BF5-E33-FQ1-A pinout, UPD44324362BF5-E33-FQ1-A application, or UPD44324362BF5-E33-FQ1-A equivalent, key selection criteria include DDR II SRAM timing compliance, HSTL Class I I/O compatibility, 165-pin plastic BGA (15 × 17 mm) mechanical fit, and support for user-programmable output impedance (35–70 Ω).

Technical Context

This device implements a synchronous DDR architecture with dual input clocks (K/K#) registering address/control on K's rising edge and data on both K and K# edges. Its internal burst counter advances A0 to generate consecutive addresses, enabling true 2-word burst transfers without external sequencing logic.

The integrated PLL generates tightly matched C/C# output clocks and CQ/CQ# echo clocks, ensuring deterministic output valid windows and enabling system-level clock skew compensation. Output impedance is calibrated via ZQ pin using an external resistor, supporting trace-matched signal integrity across high-speed parallel buses.

Key Specifications

Pinout & Package

Package: 165-pin plastic BGA (15 mm × 17 mm, 1.0 mm pitch), RoHS-compliant, lead-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar DDR II SRAM applications.

Compared with CY7C2663KV18 and IS45S32800J, the UPD44324362BF5-E33-FQ1-A uniquely combines 36-bit DDR II operation, programmable impedance, and echo-clock timing - making it irreplaceable in new designs demanding 300 MHz burst-aligned memory with deterministic output timing.

Availability

UPD44324362BF5-E33-FQ1-A is available at Aetrix Electronics and suitable for high-speed packet buffering, FPGA co-processor memory, video frame store, and industrial real-time controller applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for UPD44324362BF5-E33-FQ1-A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a global semiconductor manufacturer specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.

The μPD44324xxxB family was designed specifically for high-bandwidth, low-latency DDR II SRAM applications in networking, test equipment, and FPGA-based accelerators - emphasizing timing precision, signal integrity, and flexible burst-width scalability.

FAQ

What is the memory organization and total capacity of UPD44324362BF5-E33-FQ1-A?

The UPD44324362BF5-E33-FQ1-A is organized as 1,048,576 words × 36 bits, delivering a total capacity of 36 M-bit (4.5 M-byte). This configuration supports wide-data-path architectures such as 32-bit data buses with 4-bit parity or bit-sliced implementations. The part belongs to the μPD44324362B series, explicitly defined in Renesas datasheet R10DS0036EJ0200 as the 1M × 36 variant.

Does UPD44324362BF5-E33-FQ1-A support true DDR operation with separate input and output clocks?

Yes, UPD44324362BF5-E33-FQ1-A supports true DDR operation using dedicated input clocks (K/K#) for address/control/data registration and independent output clocks (C/C#) for data timing alignment. The C/C# pair allows precise flight-time tuning to match board trace delays, and CQ/CQ# echo clocks provide data-valid references tightly aligned to DQ outputs - all confirmed in the Pin Description and Burst Sequence sections of the official datasheet.

What is the purpose of the ZQ pin on UPD44324362BF5-E33-FQ1-A, and how is it used?

The ZQ pin on UPD44324362BF5-E33-FQ1-A is an input for output impedance calibration. It connects to an external resistor (175–350 Ω) tied to ground, enabling the device to adjust DQ, CQ, and CQ# driver strength to 0.2×RQ. This achieves 35–70 Ω programmable output impedance, eliminating discrete termination and improving signal integrity. The calibration occurs automatically every 20 μs after power-up, as specified in the Pin Description section of the datasheet.

Can UPD44324362BF5-E33-FQ1-A operate without its internal PLL enabled?

Yes, UPD44324362BF5-E33-FQ1-A can operate with the PLL disabled by pulling DLL# LOW. In this mode, the device functions at reduced clock frequencies (<120 MHz) with read latency reduced to 1.0 clock cycle. However, AC and DC electrical characteristics are not guaranteed, and timing margins degrade. For full-spec operation at 300 MHz, DLL# must be held HIGH - typically via a ≤10 kΩ resistor to VDDQ - as stated in the Pin Description and PLL Constraints sections.

What package type and dimensions does UPD44324362BF5-E33-FQ1-A use?

UPD44324362BF5-E33-FQ1-A uses a 165-pin plastic BGA package with 15 mm × 17 mm body size and 1.0 mm ball pitch. It is RoHS-compliant and lead-free, designated as "165-pin PLASTIC BGA (15 × 17)" in the Ordering Information and Pin Arrangement sections of the Renesas datasheet R10DS0036EJ0200. The package supports standard reflow profiles and is compatible with automated assembly processes.