Renesas UPD46365184BF1-E33-EQ1-A

Overview

UPD46365184BF1-E33-EQ1-A from Renesas Electronics is a 2,097,152-word × 18-bit synchronous quad data rate (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 operations, four-word burst access, and PLL-based output timing control for high-speed networking buffers and packet memory applications.

For engineers reviewing the UPD46365184BF1-E33-EQ1-A datasheet, UPD46365184BF1-E33-EQ1-A pinout, UPD46365184BF1-E33-EQ1-A application, or UPD46365184BF1-E33-EQ1-A equivalent, key selection criteria include burst-mode DDR timing compliance, HSTL Class I I/O compatibility, 18-bit wide data path for SerDes interface buffering, and 165-ball BGA footprint alignment with QDR-II layout guidelines.

Technical Context

This QDR II SRAM uses dual-clock architecture: K/K# registers address/control/data on rising edges, while C/C# governs output data timing with echo clocks CQ/CQ# tightly matched to data valid windows. Its internal burst counter and separate read/write ports enable true concurrent transactions without arbitration overhead.

The device integrates a PLL for jitter-tolerant operation down to 120 MHz, user-programmable output impedance (35–70 Ω via ZQ pin), and clock-stop capability with 20 μs recovery. All I/Os comply with JEDEC HSTL Class I standards, and JTAG 1149.1 test access supports boundary-scan validation.

Key Specifications

Pinout & Package

Package: 165-pin plastic BGA (13 × 15 mm), ball pitch 0.8 mm, lead-free finish. Thermal pad not present; mechanical mounting per JEDEC MO-270AB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C2665KV18 and AS7C3620018B, UPD46365184BF1-E33-EQ1-A delivers higher bandwidth (300 MHz vs. 250 MHz), programmable impedance for board-specific tuning, and PLL-based jitter tolerance-making it optimal for next-generation networking silicon interfacing.

Availability

UPD46365184BF1-E33-EQ1-A is available at Aetrix Electronics and suitable for high-speed network switch buffers, telecom line card packet memory, and FPGA-based protocol accelerators requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.

Supply support for UPD46365184BF1-E33-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 Corporation is a global semiconductor manufacturer specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and communications markets.

The UPD46365184BF1-E33-EQ1-A belongs to Renesas' QDR II SRAM product line, engineered specifically for high-bandwidth, low-latency packet buffering in networking infrastructure equipment operating at OC-192/STM-64 line rates and beyond.

FAQ

What is the maximum guaranteed clock frequency for UPD46365184BF1-E33-EQ1-A?

The UPD46365184BF1-E33-EQ1-A is rated for a 3.3 ns clock cycle time, supporting guaranteed operation at 300 MHz DDR (600 MT/s). This specification is validated across the full 0 °C to +70 °C operating temperature range with 1.8 V ±0.1 V supply. Operation above 300 MHz is not characterized and may violate setup/hold timing margins.

Does UPD46365184BF1-E33-EQ1-A support true concurrent read and write operations?

Yes, UPD46365184BF1-E33-EQ1-A implements physically separate read and write data ports with independent address latching. The device's internal architecture allows simultaneous read and write transactions to different addresses without arbitration delay, enabling full-duplex memory access essential for packet buffering applications.

How is output impedance calibrated on UPD46365184BF1-E33-EQ1-A?

Output impedance for Q, CQ, and CQ# drivers is calibrated using the ZQ pin. A precision resistor (175–350 Ω) connected from ZQ to ground sets nominal output impedance to 0.2 × RQ. Calibration occurs automatically every 20 μs after power-up and tracks supply/temperature drift. Direct connection to VDDQ minimizes impedance.

What is the function of DLL# on UPD46365184BF1-E33-EQ1-A?

DLL# is the PLL disable input. When pulled LOW, the internal PLL is bypassed, allowing operation at frequencies below the PLL's minimum lock range (120 MHz) for debug or low-speed validation. For normal 300 MHz operation, DLL# must be HIGH (tied to VDDQ via ≤10 kΩ resistor) to enable PLL-based timing margin.

Can UPD46365184BF1-E33-EQ1-A operate with C and C# tied HIGH?

Yes, tying C and C# HIGH forces output data synchronization to K and K# rising edges instead of C/C#. This mode eliminates need for external C/C# generation but forfeits flight-time compensation and clock skew matching benefits. Data valid window narrows, limiting maximum reliable frequency in this configuration.