Renesas UPD44165182BF5-E33-EQ3

Overview

UPD44165182BF5-E33-EQ3 from Renesas Electronics is a 1,048,576-word × 18-bit synchronous Quad Data Rate II (QDR II) SRAM with 300 MHz clock frequency, 3.3 ns cycle time, and HSTL interface. It features dual independent read/write ports, burst-2 operation, and PLL-based output timing control. It is used in high-bandwidth networking buffers and packet-forwarding ASIC/FPGA interfaces.

For engineers reviewing the UPD44165182BF5-E33-EQ3 datasheet, UPD44165182BF5-E33-EQ3 pinout, UPD44165182BF5-E33-EQ3 application, or UPD44165182BF5-E33-EQ3 equivalent, key selection considerations include its 165-pin plastic BGA (13×15) package, 1.8 V core supply with 1.4–1.8 V I/O supply, JTAG 1149.1 test port, and user-programmable output impedance (35–70 Ω).

Technical Context

This QDR II SRAM implements separate synchronous read and write data paths with concurrent transaction capability, using K/K# for address/control registration and C/C# for output data timing reference. Its internal burst counter and echo clocks (CQ/CQ#) enable precise DDR data valid windows aligned to system flight time.

The device integrates a PLL for jitter-tolerant clock scaling and supports clock-stop mode with 20 μs recovery. Input registers are edge-triggered on K (read) and K# (write); outputs are synchronized to C/C# rising edges - with fallback to K/K# if C/C# are held high.

Key Specifications

Pinout & Package

UPD44165182BF5-E33-EQ3 is housed in a 165-pin plastic BGA (13 × 15 mm) with 0.8 mm ball pitch. The package supports HSTL I/O signaling, includes dedicated echo clocks (CQ/CQ#), output impedance tuning (ZQ), and IEEE 1149.1 JTAG test access.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C2663KV18 and AS7C3318B, UPD44165182BF5-E33-EQ3 delivers higher bandwidth (300 MHz vs. 250 MHz) and tighter output timing control via integrated PLL, but requires stricter clock jitter compliance (0.2 ns TKC var) and careful ZQ calibration for impedance matching.

Availability

UPD44165182BF5-E33-EQ3 is available at Aetrix Electronics and suitable for network packet buffering, FPGA co-processor caching, and telecom baseband processing requiring stable component supply across multi-year production cycles.

Supply support for UPD44165182BF5-E33-EQ3 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.

UPD44165182BF5-E33-EQ3 belongs to Renesas' QDR II SRAM product line, engineered for ultra-high-bandwidth, low-latency memory interfacing in networking and communications equipment.

FAQ

What is the maximum guaranteed clock frequency for UPD44165182BF5-E33-EQ3?

The UPD44165182BF5-E33-EQ3 is rated for 300 MHz operation with a 3.3 ns clock cycle time. This is validated across the full commercial temperature range (0 °C to +70 °C) and requires input clock phase jitter ≤ 0.2 ns (TKC var). Operation above 300 MHz is not guaranteed and may violate setup/hold timing margins.

Does UPD44165182BF5-E33-EQ3 support true dual-port concurrent read/write operations?

Yes, UPD44165182BF5-E33-EQ3 supports fully concurrent read and write transactions on independent data buses. The read port uses Q0–Q17 and C/C# timing; the write port uses D0–D17 and K/K# timing. The block diagram confirms separate address registries, data registries, and output drivers enabling simultaneous access without arbitration delay.

How is output impedance calibrated on UPD44165182BF5-E33-EQ3?

Output impedance is calibrated via the ZQ pin: connect an external resistor RQ from ZQ to ground, where Q, CQ, and CQ# output impedance is set to 0.2 × RQ. Typical RQ values yield 35–70 Ω. Calibration occurs automatically every 20 μs after power-up. Direct connection to VDDQ minimizes impedance; grounding or leaving ZQ floating is prohibited.

Can UPD44165182BF5-E33-EQ3 operate without the PLL enabled?

Yes - pulling DLL# LOW disables the PLL, allowing operation at frequencies below the PLL's 120 MHz minimum lock range. However, AC/DC characteristics are not guaranteed in this mode, and timing margins degrade. For production use at 300 MHz, DLL# must be HIGH (tied to VDDQ via ≤10 kΩ resistor) to ensure full specification compliance.

What is the function of the CQ and CQ# pins on UPD44165182BF5-E33-EQ3?

CQ and CQ# are synchronous echo clock outputs tightly matched to data output timing. Their rising edges indicate valid data windows for Q0–Q17: CQ# aligns with the first burst word, CQ with the second. They remain active even when outputs are tristated and stop only when K/K# clocks halt - providing robust data-valid signaling for high-speed capture logic.