Renesas UPD44165184BF5-E33-EQ3

Overview

UPD44165184BF5-E33-EQ3 from Renesas Electronics is a 1,048,576-word × 18-bit synchronous quad data rate (QDR II) SRAM with 3.3 ns clock cycle time (300 MHz), HSTL interface, 1.8 V core supply, and 165-pin plastic BGA (13 × 15 mm) packaging. It supports concurrent read/write ports, four-word burst operation, and clock-stop capability for low-power idle states - deployed in high-speed network packet buffers and FPGA co-processor memory subsystems.

For engineers reviewing the UPD44165184BF5-E33-EQ3 datasheet, UPD44165184BF5-E33-EQ3 pinout, UPD44165184BF5-E33-EQ3 application, or UPD44165184BF5-E33-EQ3 equivalent, key selection considerations include its 1M × 18 organization, dual-clock (K/K# and C/C#) timing architecture, user-programmable output impedance (35–70 Ω), JTAG 1149.1 test access, and HSTL-compatible I/O voltage levels referenced to VREF = VDDQ/2.

Technical Context

This QDR II SRAM implements separate synchronous read and write data paths with independent address latching on K/K# rising edges. Its internal burst counter delivers four consecutive words per transaction, achieving 100% bus utilization in both DDR read and write modes without turnaround cycles.

The device integrates a PLL for output data valid window extension and frequency scalability, uses echo clocks (CQ/CQ#) tightly matched to data outputs for precise flight-time compensation, and supports clock-stop mode with full functional recovery within 20 μs upon clock resumption.

Key Specifications

Pinout & Package

Package: 165-pin plastic BGA (13 mm × 15 mm, 0.8 mm pitch), RoHS-compliant lead-free construction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C2665KV18-333BZI and AS7C32096A-333BIN, UPD44165184BF5-E33-EQ3 provides unique ZQ-based output impedance tuning and DLL# pin for PLL bypass during system bring-up - enabling faster validation and tighter signal integrity control in high-density routing environments.

Availability

UPD44165184BF5-E33-EQ3 is available at Aetrix Electronics and suitable for network packet buffering, FPGA co-processor memory, telecom baseband processing, and high-speed test equipment requiring stable component supply across extended production lifecycles.

Supply support for UPD44165184BF5-E33-EQ3 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and communications markets.

The UPD44165184BF5-E33-EQ3 belongs to Renesas' QDR II SRAM product line, designed specifically for high-throughput, low-latency memory applications in networking infrastructure and real-time signal processing systems.

FAQ

What is the memory organization and total density of UPD44165184BF5-E33-EQ3?

UPD44165184BF5-E33-EQ3 is organized as 1,048,576 words × 18 bits, delivering 18 Mbit (2.25 Mbyte) of synchronous static RAM. This configuration supports high-bandwidth data paths common in packet-switching and DSP applications while maintaining compatibility with standard 18-bit bus widths.

Does UPD44165184BF5-E33-EQ3 support concurrent read and write operations?

Yes, UPD44165184BF5-E33-EQ3 features fully independent read and write data ports with separate address latching. It allows simultaneous read and write transactions - provided they are initiated on non-overlapping clock edges - enabling true dual-port functionality without arbitration latency in the UPD44165184BF5-E33-EQ3.

What is the role of the ZQ pin on UPD44165184BF5-E33-EQ3?

The ZQ pin on UPD44165184BF5-E33-EQ3 serves as the output impedance calibration input. When connected to an external resistor to ground (RQ = 175–350 Ω), it sets the output driver impedance to 0.2 × RQ (35–70 Ω), allowing precise matching to PCB trace impedance without external termination resistors in the UPD44165184BF5-E33-EQ3.

Can UPD44165184BF5-E33-EQ3 operate with only the K/K# clocks, or are C/C# mandatory?

UPD44165184BF5-E33-EQ3 can operate using only K/K# clocks if C/C# are fixed HIGH; in that mode, data outputs align to K/K# rising edges. However, for optimal timing margin and flight-time matching - especially at 300 MHz - C/C# must be actively driven, as they define the precise output data valid window in the UPD44165184BF5-E33-EQ3.

What is the function of the DLL# pin on UPD44165184BF5-E33-EQ3?

The DLL# pin on UPD44165184BF5-E33-EQ3 disables the internal PLL when pulled LOW. This allows system-level debugging at reduced clock frequencies without PLL lock requirements, though AC/DC specifications are not guaranteed in this mode. For normal operation, DLL# must be tied HIGH (e.g., to VDDQ) in the UPD44165184BF5-E33-EQ3.