Renesas UPD46365362BF1-E50-EQ1-A

Overview

UPD46365362BF1-E50-EQ1-A from Renesas Electronics is a 1,048,576-word × 36-bit synchronous Quad Data Rate II (QDR-II) SRAM with 1.8 V core supply, 3.3 ns clock cycle time (300 MHz), HSTL interface, and 165-pin plastic BGA (13 × 15) packaging. It supports concurrent read/write ports, burst-2 operation, and PLL-based output timing for high-speed networking buffer applications.

For engineers reviewing the UPD46365362BF1-E50-EQ1-A datasheet, UPD46365362BF1-E50-EQ1-A pinout, UPD46365362BF1-E50-EQ1-A application, or UPD46365362BF1-E50-EQ1-A equivalent, key selection considerations include its 36-bit wide data bus, dual-clock (K/K# and C/C#) DDR timing architecture, user-programmable output impedance (35–70 Ω), JTAG 1149.1 test port, and clock-stop capability with 20 μs recovery.

Technical Context

The UPD46365362BF1-E50-EQ1-A implements a true dual-port QDR-II architecture with physically separate read and write data paths, enabling simultaneous transactions without arbitration. Its internal PLL locks to the K clock input to generate precise C/C# output clocks and tightly matched CQ/CQ# echo clocks-critical for deterministic flight-time compensation in high-speed SerDes and packet buffer systems.

It uses full-CMOS six-transistor memory cells and integrates burst counters, address registers latched on K/K# rising edges, and HSTL Class I-compliant I/Os referenced to VREF = VDDQ/2. Byte write control (BW0#–BW3#) enables selective 9-bit sub-word writes within the 36-bit data width, supporting fine-grained memory updates in telecom line cards and FPGA co-processor buffers.

Key Specifications

Pinout & Package

UPD46365362BF1-E50-EQ1-A is housed in a 165-pin plastic BGA (13 × 15 mm, 0.8 mm pitch), with balls arranged in a grid indexed A–R (11 columns) × 1–11 (11 rows), excluding corner and center voids. The package supports automated optical inspection and high-density PCB routing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C2663KV18-333BZC and AS7C362000B-333BIN, the UPD46365362BF1-E50-EQ1-A offers tighter setup/hold timing (0.3 ns), integrated ZQ impedance tuning, and explicit clock-stop recovery (20 μs), making it preferable for latency-critical telecom and test equipment designs.

Availability

UPD46365362BF1-E50-EQ1-A is available at Aetrix Electronics and suitable for high-speed networking equipment, FPGA-accelerated compute platforms, and real-time industrial control systems requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for UPD46365362BF1-E50-EQ1-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 is a global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.

The UPD46365362BF1-E50-EQ1-A belongs to Renesas' QDR-II SRAM product line, engineered specifically for ultra-low-latency, high-bandwidth buffering in networking ASICs, FPGA co-processors, and baseband subsystems demanding deterministic DDR timing and robust signal integrity.

FAQ

What is the maximum operating frequency of the UPD46365362BF1-E50-EQ1-A?

The UPD46365362BF1-E50-EQ1-A supports a maximum clock frequency of 300 MHz, corresponding to a 3.3 ns clock cycle time. This is specified under commercial temperature conditions (0 °C to +70 °C) with VDD = 1.8 ± 0.1 V and VDDQ = 1.4–1.8 V. At this speed, it achieves 600 million transfers per second (MT/s) on each of its 36 data lines in DDR mode. The device also supports 250 MHz operation (4.0 ns cycle) for lower-power or thermally constrained deployments.

Does the UPD46365362BF1-E50-EQ1-A support independent read and write operations?

Yes, the UPD46365362BF1-E50-EQ1-A implements a true dual-port QDR-II architecture with physically separate read and write data paths (Q0–Q35 and D0–D35), allowing fully concurrent READ and WRITE transactions without arbitration or contention. This enables 100% bus utilization-critical for applications like packet buffering where ingress and egress traffic must be handled simultaneously at line rate.

How does the ZQ pin function on the UPD46365362BF1-E50-EQ1-A?

The ZQ pin on the UPD46365362BF1-E50-EQ1-A is an input used to calibrate output driver impedance for Q, CQ, and CQ# signals. It connects to an external precision resistor (typically 240 Ω) to ground, setting output impedance to 0.2 × RQ (e.g., 48 Ω). Calibration occurs automatically every 20 μs after power-up. Direct connection to VDDQ minimizes impedance; grounding or leaving ZQ floating is prohibited and will cause undefined behavior.

What is the role of the DLL# pin on the UPD46365362BF1-E50-EQ1-A?

The DLL# pin on the UPD46365362BF1-E50-EQ1-A disables the internal PLL when pulled LOW, allowing the device to operate at clock frequencies below the minimum PLL lock range (120 MHz) for board-level debugging or low-speed validation. During DLL# = LOW operation, read latency changes to 1.0 clock cycle, but AC/DC characteristics are not guaranteed. For normal operation, DLL# must be tied HIGH (e.g., to VDDQ via ≤10 kΩ resistor).

Can the UPD46365362BF1-E50-EQ1-A be used in industrial temperature applications?

No-the UPD46365362BF1-E50-EQ1-A is rated for commercial temperature range only (0 °C to +70 °C), as indicated by the "E" prefix (not "EY") in its ordering code. For extended temperature operation (−40 °C to +85 °C), Renesas offers the UPD46365362BF1-E50Y-EQ1-A variant. Using the -E50-EQ1-A outside its specified ambient range may result in timing violations, increased leakage current, or functional failure.