Renesas UPD46185094BF1-E33-EQ1-A

Overview

UPD46185094BF1-E33-EQ1-A from Renesas Electronics is a 2,097,152-word × 9-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 4-word burst reads/writes, separate read/write ports, and concurrent transactions for high-bandwidth networking buffers.

For engineers reviewing the UPD46185094BF1-E33-EQ1-A datasheet, UPD46185094BF1-E33-EQ1-A pinout, UPD46185094BF1-E33-EQ1-A application, or UPD46185094BF1-E33-EQ1-A equivalent, key selection criteria include DDR timing compliance, HSTL I/O voltage tolerance, burst-addressing behavior, output impedance programmability (35–70 Ω), and PLL-enabled clock skew matching via C/C# and CQ/CQ#.

Technical Context

This QDR-II SRAM uses dual-clock architecture: K/K# registers address/control/data on rising edges, while C/C# control output data timing with precise flight-time alignment. Its internal burst counter and synchronous peripheral logic enable full bus utilization during both READ and WRITE operations without turnaround cycles.

The device integrates a PLL for jitter-tolerant operation down to 120 MHz, user-programmable output impedance via ZQ calibration, and independent read/write data paths supporting simultaneous access. Clock-stop mode suspends operation with 20 μs recovery, and JTAG 1149.1 test access enables boundary-scan verification.

Key Specifications

Pinout & Package

UPD46185094BF1-E33-EQ1-A is housed in a 165-pin plastic BGA (13 × 15 mm grid, 0.8 mm pitch) with exposed thermal pad. Pin functions are defined per top-view layout in Renesas datasheet R10DS0113EJ0200 Rev.2.00 Page 4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C2665KV18-333BZXC and AS7C3256B-33PCN, UPD46185094BF1-E33-EQ1-A delivers optimal balance of 9-bit data width, 300 MHz QDR-II timing, and BGA packaging for high-speed packet buffering-avoiding over-provisioned width or under-specified asynchronous performance.

Availability

UPD46185094BF1-E33-EQ1-A is available at Aetrix Electronics and suitable for packet buffering in network switches, line card memory in 10G/25G Ethernet systems, and real-time baseband processing requiring stable component supply and long-term lifecycle support.

Supply support for UPD46185094BF1-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 UPD46185094BF1-E33-EQ1-A belongs to Renesas' QDR-II SRAM product line, engineered specifically for high-bandwidth, low-latency buffering in networking infrastructure and wireless base stations where deterministic burst access and HSTL compatibility are critical.

FAQ

What is the exact memory organization and total capacity of UPD46185094BF1-E33-EQ1-A?

UPD46185094BF1-E33-EQ1-A is organized as 2,097,152 words × 9 bits, delivering 18,874,368 bits (18 Mbit) of total storage. The 9-bit width supports 8-bit data plus 1-bit parity or metadata, making it suitable for applications requiring error detection or extended control signaling without padding overhead.

Does UPD46185094BF1-E33-EQ1-A support true concurrent read and write operations?

Yes, UPD46185094BF1-E33-EQ1-A features physically separate read and write data ports (Q0–Q8 and D0–D8), enabling simultaneous read and write transactions without bus arbitration or turnaround cycles. This architecture sustains full 300 MHz throughput on both ports, essential for full-duplex packet buffering.

How does the ZQ pin function in UPD46185094BF1-E33-EQ1-A, and what external component is required?

The ZQ pin on UPD46185094BF1-E33-EQ1-A connects to an external precision resistor (typically 100 Ω) to ground, enabling automatic calibration of output driver impedance between 35 Ω and 70 Ω. This eliminates the need for discrete series termination resistors and adapts to voltage/temperature drift every 20 μs after power-up.

What clocking scheme does UPD46185094BF1-E33-EQ1-A use to ensure timing reliability at 300 MHz?

UPD46185094BF1-E33-EQ1-A employs a dual-clock architecture: K/K# registers inputs, while C/C# govern output data timing. Its integrated PLL locks to K and generates tightly matched C/C# and echo clocks CQ/CQ#, minimizing skew and ensuring robust data capture at 300 MHz-even under voltage/temperature variation.

Is UPD46185094BF1-E33-EQ1-A compatible with standard HSTL Class I interfaces?

Yes, UPD46185094BF1-E33-EQ1-A fully complies with JEDEC HSTL Class I specifications. Its VREF input is internally referenced to VDDQ/2 (~0.75 V), and its VOH/VOL levels meet HSTL thresholds across temperature and voltage ranges, ensuring interoperability with Xilinx Virtex, Intel Stratix, and other HSTL-capable FPGAs and ASICs.