Renesas R1QDA7236ABG-22IB0

Overview

R1QDA7236ABG-22IB0 from Renesas Electronics is a 72-Mbit (2,097,152 × 36-bit) QDR™ II+ synchronous SRAM with on-die termination (ODT), 2.5-cycle read latency, and 450 MHz maximum operating frequency. It uses dual 1.8 V core (VDD) and 1.4–1.5 V I/O (VDDQ) supplies, features HSTL I/O, DLL-based timing control, and supports concurrent read/write operations via separate data ports. It is deployed in high-bandwidth network packet buffers and switch fabric memory subsystems.

For engineers reviewing the R1QDA7236ABG-22IB0 datasheet, R1QDA7236ABG-22IB0 pinout, R1QDA7236ABG-22IB0 application, or R1QDA7236ABG-22IB0 equivalent, key selection criteria include burst-of-4 DDR timing, ODT impedance programmability via ZQ, QVLD-valid-data indication, 165-pin FBGA (15 × 17 mm) package compatibility, and industrial temperature support (−40°C to +85°C).

Technical Context

This device implements a true quad-data-rate architecture with independent read and write data paths, using K and /K as primary input clocks and CQ and /CQ as echo clocks for precise data capture. Its internal burst counter and synchronous peripheral logic enable full bus utilization without turnaround cycles.

The R1QDA7236ABG-22IB0 integrates on-die termination (ODT) controlled by the ODT pin and calibrated against an external ZQ resistor, supporting Thevenin-equivalent termination ranges of 52–105 Ω (low range) or 105–150 Ω (high range). It also includes JTAG 1149.1 test access and DLL disable (/DOFF) for low-frequency operation.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 15 mm × 17 mm body, 0.8 mm ball pitch, RoHS-compliant Pb-free tray packaging.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C2663KV18-450BZXC and AS7C36S2048A-450BIN, the R1QDA7236ABG-22IB0 provides integrated ODT and QVLD - eliminating external components and simplifying high-speed timing closure - while maintaining identical density, speed, and industrial temperature compliance.

Availability

R1QDA7236ABG-22IB0 is available at Aetrix Electronics and suitable for high-speed networking equipment, telecom infrastructure, and industrial embedded systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for R1QDA7236ABG-22IB0 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 specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and communications markets.

The R1QDA72 series belongs to Renesas' QDR™ II+ SRAM product line, engineered specifically for ultra-high-bandwidth, low-latency buffering in network switching, routing, and packet processing systems.

FAQ

What is the maximum operating frequency and read latency of the R1QDA7236ABG-22IB0?

The R1QDA7236ABG-22IB0 operates at up to 450 MHz with a fixed 2.5-cycle read latency. This means valid output data appears 2.5 clock cycles after the read command is registered on the K clock edge. The part number suffix "-22" directly indicates the 450 MHz speed bin and 2.5-cycle latency per Renesas' ordering nomenclature.

Does the R1QDA7236ABG-22IB0 support on-die termination (ODT), and how is it configured?

Yes, the R1QDA7236ABG-22IB0 supports ODT via the ODT pin and ZQ calibration resistor. When ODT is enabled, its Thevenin-equivalent resistance is set to either 0.3×RQ (low range: 52–105 Ω) or 0.6×RQ (high range: 105–150 Ω), depending on the logic level applied to the ODT pin. The R1QDA7236ABG-22IB0 datasheet specifies exact RQ tolerance ranges for each mode.

What is the function of the QVLD pin on the R1QDA7236ABG-22IB0, and how does it improve system timing?

The QVLD pin on the R1QDA7236ABG-22IB0 asserts one-half clock cycle before the first valid read data and deasserts one-half cycle after the last, providing a precise, edge-aligned enable signal for data capture. This eliminates setup/hold uncertainty in FPGA or ASIC receivers, significantly easing timing closure at 450 MHz - a key advantage over SRAMs lacking QVLD.

What package type and dimensions does the R1QDA7236ABG-22IB0 use, and is it RoHS-compliant?

The R1QDA7236ABG-22IB0 uses a 165-ball FBGA package measuring 15 mm × 17 mm × 1.4 mm with 0.8 mm ball pitch. It is Pb-free and RoHS-compliant (level 6/6), marked with "PB-F" per Renesas' packaging standard. The "BG" in the part number explicitly denotes this BGA variant.

How does the R1QDA7236ABG-22IB0 handle power-up initialization and clock stability requirements?

The R1QDA7236ABG-22IB0 requires strict power sequencing: VSS → VDD → VDDQ/VREF → inputs. After power stabilization, it needs ≥20 μs of stable K and /K clocks (or ≥1024 cycles below 180 MHz) before issuing commands. The /DOFF pin allows DLL bypass for low-frequency operation, and the device enters high-Z state automatically during power-up.