Renesas R1Q3A7236ABA-33IB0

Overview

R1Q3A7236ABA-33IB0 from Renesas Electronics is a 72-Mbit QDR™ II SRAM with 2,097,152-word × 36-bit organization, fabricated in advanced CMOS using full six-transistor memory cells. It operates at 333 MHz (3.0 ns cycle time), supports 1.8 V core and 1.4–1.5 V I/O supply, features synchronous quad data rate burst-of-4 operation, and is packaged in a 165-pin 13×15 mm FBGA. It serves as high-bandwidth buffer memory in network packet processors and telecom line cards.

For engineers reviewing the R1Q3A7236ABA-33IB0 datasheet, R1Q3A7236ABA-33IB0 pinout, R1Q3A7236ABA-33IB0 application, or R1Q3A7236ABA-33IB0 equivalent, key selection criteria include its 333 MHz max frequency, 1.5-cycle read latency, HSTL I/O compatibility, burst-of-4 DDR interface, and industrial temperature range (−40°C to +85°C).

Technical Context

This device implements a true synchronous dual-port architecture with independent read and write data paths, controlled by differential clock pairs K/̅K for address/control registration and C/̅C (or K/̅K when C/̅C tied high) for output timing. Its internal burst counter and self-timed write control eliminate external address sequencing logic.

The R1Q3A7236ABA-33IB0 integrates DLL/PLL circuitry for data valid window extension and supports programmable output impedance via ZQ calibration. It includes JTAG 1149.1 test access and clock-stop capability with microsecond restart - critical for power-managed systems requiring rapid resumption of high-speed memory access.

Key Specifications

Pinout & Package

Package: 165-pin plastic FBGA (13 × 15 × 1.4 mm), RoHS-compliant, industrial-grade marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C2665KV18-333BZC and IDT72T36130L5PF, the R1Q3A7236ABA-33IB0 uniquely combines industrial temperature rating, pin-compatible 165-pin FBGA packaging, and proven reliability in deployed telecom infrastructure - making it the preferred choice for field-deployed systems requiring long-term availability and extended environmental tolerance.

Availability

R1Q3A7236ABA-33IB0 is available at Aetrix Electronics and suitable for network packet processors, telecom line cards, and high-performance test equipment requiring stable component supply across extended product lifecycles.

Supply support for R1Q3A7236ABA-33IB0 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 R1Q3A7236ABA-33IB0 belongs to Renesas' QDR II SRAM product line, engineered specifically for high-bandwidth, low-latency buffering in networking and communications equipment where deterministic timing and industrial reliability are essential.

FAQ

What is the maximum operating frequency of the R1Q3A7236ABA-33IB0?

The R1Q3A7236ABA-33IB0 is rated for a maximum clock frequency of 333 MHz, corresponding to a minimum cycle time of 3.0 ns. This speed is guaranteed across the full industrial temperature range (−40°C to +85°C) and under specified voltage conditions (VDD = 1.8 V ±0.1 V, VDDQ = 1.5 V). The device achieves this performance using differential clock inputs (K/̅K and C/̅C) and internal DLL/PLL timing compensation.

Does the R1Q3A7236ABA-33IB0 support on-die termination (ODT)?

No, the R1Q3A7236ABA-33IB0 does not support on-die termination. It belongs to the QDR II generation (not QDR II+), and the ODT pin is absent from its pinout. Instead, the device relies on external termination and ZQ-calibrated output drivers for impedance matching. This is confirmed by the absence of the ODT pin in the official pin arrangement diagram and the "No" entry under "ODT" in the product lineup table on page 15 of the datasheet.

What is the read latency of the R1Q3A7236ABA-33IB0 and how does it affect system timing?

The R1Q3A7236ABA-33IB0 has a fixed read latency of 1.5 clock cycles. This means that valid output data appears 1.5 cycles after the /R signal is asserted on the rising edge of K. In practical terms, for a 333 MHz clock (3.0 ns period), this translates to a 4.5 ns delay from command to first data word - enabling tight pipeline integration in ASIC/FPGA-based datapaths without added wait states.

Can the R1Q3A7236ABA-33IB0 operate with only the K/̅K clocks, or are C/̅C required?

The R1Q3A7236ABA-33IB0 can operate using only the K/̅K clocks: C and /C pins may be tied high (to VDDQ) to force the device to use K/̅K as the output timing reference. This simplifies clock distribution in systems lacking dedicated output clocks. When C/̅C are tied high, output data remains synchronized to K/̅K rising edges, preserving full functionality including echo clocks CQ/̅CQ.

What package type and dimensions does the R1Q3A7236ABA-33IB0 use?

The R1Q3A7236ABA-33IB0 uses a 165-pin plastic FBGA package measuring 13 mm × 15 mm × 1.4 mm (body size), with ball pitch of 0.8 mm. The "BB" suffix in the part number explicitly denotes the 13×15 mm FBGA variant, and the "I" in "33IB0" confirms industrial temperature grade. This package is RoHS-compliant and designed for standard reflow soldering processes.