Renesas UPD46365092BF1-E40Y-EQ1-A

Overview

UPD46365092BF1-E40Y-EQ1-A from Renesas Electronics is a 4,194,304-word × 9-bit synchronous Quad Data Rate II (QDR-II) SRAM with HSTL interface, 1.8 V core supply, 4.0 ns clock cycle time (250 MHz), and 165-pin plastic BGA (13 × 15) packaging. It supports concurrent read/write ports, burst-2 operation, and clock-stop capability for low-power system states in high-speed networking buffers.

For engineers reviewing the UPD46365092BF1-E40Y-EQ1-A datasheet, UPD46365092BF1-E40Y-EQ1-A pinout, UPD46365092BF1-E40Y-EQ1-A application, or UPD46365092BF1-E40Y-EQ1-A equivalent, key selection considerations include its -40°C to +85°C industrial temperature rating, user-programmable output impedance (35–70 Ω), JTAG 1149.1 test access, and dual-clock timing architecture using K/K# inputs and C/C# outputs for precise flight-time matching.

Technical Context

The UPD46365092BF1-E40Y-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 synchronizes output timing to C/C# rising edges, delivering tightly matched echo clocks (CQ/CQ#) with ±0.1 ns variation relative to data valid/hold windows.

Control logic uses K and K# as complementary input clocks-address and control signals latch on K's rising edge, while write data latches on K#'s rising edge. Output data is referenced to C/C# rising edges (first word on C#↑, second on C↑), or falls back to K/K# if C/C# are held HIGH. DLL# disables the PLL for debug-mode operation at sub-250 MHz frequencies.

Key Specifications

Pinout & Package

Package: 165-pin plastic BGA (13 × 15, 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 CY7C2665KV18-400BZI and AS7C33680B-20JIN, the UPD46365092BF1-E40Y-EQ1-A uniquely balances industrial temperature range, burst-2 QDR-II timing, and 9-bit native width-making it optimal for space-constrained, thermally demanding telecom and networking buffers where pin count and timing predictability are critical.

Availability

UPD46365092BF1-E40Y-EQ1-A is available at Aetrix Electronics and suitable for packet buffering, baseband processing, and real-time video frame storage requiring stable component supply across extended temperature ranges and high-reliability manufacturing programs.

Supply support for UPD46365092BF1-E40Y-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 UPD46365092BF1-E40Y-EQ1-A belongs to Renesas' QDR-II SRAM product line, engineered specifically for high-speed, low-latency data buffering in networking ASICs, telecom line cards, and real-time signal processing systems requiring deterministic dual-port access.

FAQ

What is the operating temperature range for UPD46365092BF1-E40Y-EQ1-A?

The UPD46365092BF1-E40Y-EQ1-A is rated for industrial operation from -40°C to +85°C. This is confirmed in the Ordering Information table (Page 2) and DC Characteristics 2 section (Page 15) of the datasheet, where parameters like IDD and ISB1 are explicitly specified for TA = −40 to 85°C. The "Y" suffix in the part number denotes this extended temperature grade.

Does UPD46365092BF1-E40Y-EQ1-A support JTAG boundary-scan testing?

Yes, the UPD46365092BF1-E40Y-EQ1-A integrates a IEEE 1149.1-compliant test access port with dedicated TMS, TDI, TCK, and TDO pins (Page 3 pin map and Page 6–7 pin description). All JTAG signals operate at 1.8 V I/O level, and the device supports full boundary-scan functionality for production test and in-system debug.

How does the UPD46365092BF1-E40Y-EQ1-A achieve precise output timing alignment?

The UPD46365092BF1-E40Y-EQ1-A achieves precise output timing alignment through its integrated PLL and dual-output-clock architecture. C and C# provide user-controlled timing references for data output, while CQ and CQ# echo clocks are designed to track data valid/hold windows with ±0.1 ns variation-guaranteed by design and verified in AC Characteristics (Page 18, Note 6).

Can UPD46365092BF1-E40Y-EQ1-A operate without its PLL enabled?

Yes, the UPD46365092BF1-E40Y-EQ1-A can operate with the PLL disabled by asserting DLL# LOW. In this mode, it functions at reduced clock frequencies (<250 MHz) with read latency reduced to 1.0 clock cycle. However, the datasheet explicitly states that AC/DC characteristics are not guaranteed under DLL#-disabled operation (Page 6, Pin Description; Page 9, PLL Constraints).

What is the purpose of the ZQ pin on UPD46365092BF1-E40Y-EQ1-A?

The ZQ pin on UPD46365092BF1-E40Y-EQ1-A serves as the output impedance calibration input. When connected to an external resistor to ground, it sets the output driver impedance to 0.2 × RQ (typically 35–70 Ω). Calibration occurs automatically every 20 μs after power-up to compensate for voltage and temperature drift, ensuring consistent signal integrity across operating conditions.