Renesas UPD44325094BF5-E33-FQ1-A

Overview

UPD44325094BF5-E33-FQ1-A from Renesas Electronics is a 4,194,304-word × 9-bit synchronous quad data rate (QDR II) SRAM with 3.3 ns clock cycle time (300 MHz), 1.8 V core supply, HSTL interface, and 165-pin plastic BGA (15 × 17) package. It delivers concurrent read/write operations and supports burst-4 DDR transfers for high-bandwidth networking buffers and packet memory applications.

For engineers reviewing the UPD44325094BF5-E33-FQ1-A datasheet, UPD44325094BF5-E33-FQ1-A pinout, UPD44325094BF5-E33-FQ1-A application, or UPD44325094BF5-E33-FQ1-A equivalent, key selection considerations include its 9-bit organization, 300 MHz QDR timing, HSTL I/O compliance, DLL-enabled output timing control, and byte-write capability via BW0#.

Technical Context

This QDR II SRAM uses dual-clock architecture: K/K# registers address/control on rising edges and latches input data across both edges, while C/C# provide programmable output timing references for precise flight-time matching. Its internal burst counter and separate read/write data ports enable true concurrent transactions without arbitration delay.

The device integrates a PLL for jitter-tolerant clock scaling and user-programmable output impedance (35–70 Ω) via ZQ calibration. Clock-stop mode suspends operation with full state retention and restores normal function within 20 μs upon clock resumption - critical for power-gated systems.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C2665KV18-333BZC and AS7C33618B-333BIN, UPD44325094BF5-E33-FQ1-A provides native 9-bit organization, ZQ-based impedance tuning, and guaranteed 300 MHz operation in commercial temperature range - making it optimal for parity-aware, space-constrained networking buffers.

Availability

UPD44325094BF5-E33-FQ1-A is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, and high-speed test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for UPD44325094BF5-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 leader delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.

The UPD44325094BF5-E33-FQ1-A belongs to Renesas' QDR II SRAM product line, engineered specifically for high-throughput, low-latency packet memory in networking and communications equipment.

FAQ

What is the memory organization of the UPD44325094BF5-E33-FQ1-A?

The UPD44325094BF5-E33-FQ1-A is organized as 4,194,304 words × 9 bits, totaling 36 Mbit. This 9-bit configuration supports 8-bit data plus 1-bit parity, making it suitable for error-detecting applications in telecom and industrial systems. The device uses synchronous burst-4 addressing and operates exclusively in QDR II mode.

Does the UPD44325094BF5-E33-FQ1-A support concurrent read and write operations?

Yes, the UPD44325094BF5-E33-FQ1-A features physically separate read and write data ports, enabling true concurrent read and write transactions without arbitration delay. This is implemented via independent input (D0–D8) and output (Q0–Q8) buses, each synchronized to dedicated clock domains (K/K# for writes, C/C# for reads), which is critical for real-time packet buffering.

What is the role of the ZQ pin on the UPD44325094BF5-E33-FQ1-A?

The ZQ pin on the UPD44325094BF5-E33-FQ1-A is an input used for dynamic output impedance calibration. When connected to a precision resistor to ground, it sets the drive strength of Q0–Q8, CQ/CQ#, and other outputs to 35–70 Ω. Calibration occurs automatically every 20 μs after power-up to compensate for voltage and temperature drift - ensuring consistent signal integrity at 300 MHz.

Can the UPD44325094BF5-E33-FQ1-A operate without its PLL enabled?

Yes, the UPD44325094BF5-E33-FQ1-A can operate with the PLL disabled by asserting DLL# = LOW, allowing use at frequencies below the PLL's minimum lock range (120 MHz). However, AC/DC characteristics are not guaranteed in this mode. For full-spec 300 MHz operation, DLL# must be held HIGH (typically tied to VDDQ via ≤10 kΩ resistor) to enable the PLL and widen the output data valid window.

Is the UPD44325094BF5-E33-FQ1-A pin-compatible with other devices in the μPD44325xxx family?

No, the UPD44325094BF5-E33-FQ1-A is not pin-compatible with other members of the μPD44325xxx family (e.g., μPD44325084B or μPD44325184B) due to differing data-width signaling: the x9 variant uses BW0# for byte write, while x8 uses NW0#/NW1# and x18 uses BW0#/BW1#. Pin assignments for D/Q signals and control lines vary across organizations - PCB layout must match the exact 9-bit variant.