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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Renesas R1QAA7236ABB-20IA0

Name: R1QAA7236ABB-20IA0
Brand: Renesas
SKU: R1QAA7236ABB-20IA0
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: R1QAA7236ABB-20IA0

Manufacturer:: Renesas

Category:: Memory

Package:: -

Datasheet:: R1QAA7236ABB-20IA0.pdf

Description:: STANDARD SRAM, 2MX36, 0.45NS

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Product details

Overview

R1QAA7236ABB-20IA0 from Renesas Electronics is a 72-Mbit (2,097,152 × 36) QDR™ II+ synchronous SRAM with 2.5-cycle read latency, 1.8 V core / 1.4–1.5 V I/O supply, and 165-pin FBGA (13 × 15 mm) packaging. It supports 500 MHz clock frequency (2 ns cycle time), burst-of-4 DDR operation, and separate read/write data ports - deployed in high-bandwidth network packet buffers and telecom line-card memory subsystems.

For engineers reviewing the R1QAA7236ABB-20IA0 datasheet, R1QAA7236ABB-20IA0 pinout, R1QAA7236ABB-20IA0 application, or R1QAA7236ABB-20IA0 equivalent, key selection criteria include verified QDR-II+ timing compliance, on-die termination (ODT) support per R1QD-series specification, HSTL I/O compatibility, DLL/PLL-enabled output timing margin, and industrial temperature range (−40°C to +85°C) operation.

Technical Context

This device implements a true quad-data-rate architecture using dual-edge-triggered K and /K clocks for address/control latching and data transfer, with echo clocks CQ and /CQ edge-aligned to output data for precise capture. Its internal burst counter and synchronous peripheral logic eliminate external address sequencing logic.

The R1QAA7236ABB-20IA0 belongs to the R1QD-series variant (denoted by 'D' in position 3 of part number), confirming ODT enablement, 2.5-cycle read latency, and absence of C/C pins - relying solely on K and /K as output reference clocks. It uses full-CMOS six-transistor memory cells and supports programmable output impedance via ZQ calibration resistor.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Density	72 Mbit (2,097,152 words × 36 bits) - enables single-chip replacement for two ×36 x 36-Mbit legacy SRAMs in packet buffer designs.
Max Clock Frequency	500 MHz (2 ns cycle time) - supports 2 Gbps per data pin in burst-of-4 DDR mode, delivering 36 Gbps aggregate bandwidth.
Read Latency	2.5 clock cycles - fixed latency ensures deterministic timing for pipeline-synchronized network processors.
Supply Voltages	VDD = 1.7–1.9 V (core); VDDQ = 1.4–1.5 V (I/O) - enables low-power operation while maintaining HSTL-compliant signal integrity.
Package	165-pin FBGA, 13 × 15 × 1.4 mm - RoHS-compliant, industrial-grade package with validated thermal performance up to 85°C ambient.
Operating Temperature	−40°C to +85°C - qualified for carrier-grade infrastructure equipment requiring extended thermal reliability.
On-Die Termination	Enabled (R1QD-series) - provides selectable Thevenin termination (52–150 Ω) via ODT pin and ZQ resistor, eliminating external termination components.

Pinout & Package

Package: 165-ball plastic FBGA (13 mm × 15 mm, 0.8 mm pitch), ball grid layout per Renesas datasheet R10DS0169EJ0011, page 4 (R1QD(K)A7236 bottom variant).

Pin/Terminal	Circuit Role	Design Meaning
K, /K	Input clock pair	Registers all address, control, and write data on rising edges; defines timing reference for all synchronous operations.
/R, /W	Synchronous command inputs	/R initiates burst read; /W initiates burst write; both sampled on K rising edge with setup/hold timing constraints.
/BW0–/BW3	Byte write enable inputs	Independently mask four 9-bit byte lanes during write; supports partial writes without read-modify-write overhead.
D0–D35	Input data bus	36-bit wide synchronous input port; data registered on K and /K rising edges (two edges per write cycle).
Q0–Q35	Output data bus	36-bit wide synchronous output port; data valid aligned to CQ and /CQ edges; QVLD indicates active window.
CQ, /CQ	Output echo clocks	Edge-aligned to output data; used for receiver clocking; continue running during tri-state; no stop capability.
QVLD	Valid data indicator	Asserts half-cycle before first read data and deasserts half-cycle before last - simplifies high-speed data capture logic.
ODT	On-die termination control	High = high-range mode (105–150 Ω); low = low-range mode (52–105 Ω); floating = high-range mode (R1QD-series default).
ZQ	Impedance calibration input	Connected to precision resistor to ground (RQ = 250 Ω typical); sets output driver and ODT impedance to 0.2×RQ or 0.3/0.6×RQ.
/DOFF	DLL/PLL disable	Low disables DLL/PLL for stable sub-120 MHz operation; high enables DLL/PLL for full-frequency timing margin.
TMS, TDI, TCK, TDO	JTAG test interface	IEEE 1149.1 compliant; supports boundary scan and device-level diagnostics; operates at 1.8 V I/O level.

Key Features

Feature	Design Value
Quad Data Rate (QDR-II+) Architecture	Enables concurrent read and write operations on independent buses - eliminates arbitration delay in real-time buffering applications.
Burst-of-4 Access	Reduces address bus frequency by 4× versus single-word access - lowers controller complexity and PCB routing congestion.
HSTL Class I I/O Interface	Guarantees signal integrity at 500 MHz with controlled slew rate and on-die termination - compatible with FPGA and ASIC memory controllers.
Programmable Output Impedance	Calibrated via external ZQ resistor (250 Ω typical) - matches system trace impedance without board-level resistors or tuning.
Industrial Temperature Range	Qualified from −40°C to +85°C - meets GR-1089-CORE and Telcordia requirements for outdoor and central-office deployment.
Integrated JTAG Boundary Scan	Supports IEEE 1149.1 testing without external debug hardware - accelerates production test and field failure analysis.

Applications

Network Packet Buffer	Telecom Line Card Memory
Use Scenario: Storing ingress/egress packets in multi-gigabit Ethernet switches and routers with strict latency budgets. IC Role / Device Role / Timing Role: High-bandwidth, low-latency shared memory buffer interfacing directly to network processor memory controller via QDR-II+ bus. Use Value: 36 Gbps sustained bandwidth and deterministic 2.5-cycle read latency enable line-rate packet processing at 10 Gbps and beyond.	Use Scenario: Buffering voice, video, and control data in carrier-class DSLAMs, OLTs, and base station controllers. IC Role / Device Role / Timing Role: Dual-port SRAM serving as frame buffer and statistics accumulator in time-division multiplexed (TDM) and packet-switched hybrid systems. Use Value: Separate read/write ports and ODT support reduce signal reflections on dense backplane traces, improving BER in noisy telecom environments.
Wireless Baseband Processing	Test Equipment Memory Subsystem
Use Scenario: Real-time buffering of IQ samples between RF front-end ADC/DAC and FPGA-based digital pre-distortion (DPD) engines. IC Role / Device Role / Timing Role: Low-jitter, burst-access memory synchronized to FPGA fabric clocks for deterministic sample alignment. Use Value: DLL/PLL circuitry delivers >100 ps output data valid window - critical for sub-nanosecond timing closure in 5G NR baseband chains.	Use Scenario: High-speed pattern memory in automated test equipment (ATE) for semiconductor wafer probing and IC functional validation. IC Role / Device Role / Timing Role: Deterministic, jitter-tolerant memory delivering stimulus/response vectors at 500 MHz to parallel DUT interfaces. Use Value: QVLD signal and echo clocks eliminate need for external strobe generation - reduces ATE channel count and improves test repeatability.

Network Packet Buffer

Telecom Line Card Memory

Use Scenario: Storing ingress/egress packets in multi-gigabit Ethernet switches and routers with strict latency budgets.

IC Role / Device Role / Timing Role: High-bandwidth, low-latency shared memory buffer interfacing directly to network processor memory controller via QDR-II+ bus.

Use Value: 36 Gbps sustained bandwidth and deterministic 2.5-cycle read latency enable line-rate packet processing at 10 Gbps and beyond.

Use Scenario: Buffering voice, video, and control data in carrier-class DSLAMs, OLTs, and base station controllers.

IC Role / Device Role / Timing Role: Dual-port SRAM serving as frame buffer and statistics accumulator in time-division multiplexed (TDM) and packet-switched hybrid systems.

Use Value: Separate read/write ports and ODT support reduce signal reflections on dense backplane traces, improving BER in noisy telecom environments.

Wireless Baseband Processing

Test Equipment Memory Subsystem

Use Scenario: Real-time buffering of IQ samples between RF front-end ADC/DAC and FPGA-based digital pre-distortion (DPD) engines.

IC Role / Device Role / Timing Role: Low-jitter, burst-access memory synchronized to FPGA fabric clocks for deterministic sample alignment.

Use Value: DLL/PLL circuitry delivers >100 ps output data valid window - critical for sub-nanosecond timing closure in 5G NR baseband chains.

Use Scenario: High-speed pattern memory in automated test equipment (ATE) for semiconductor wafer probing and IC functional validation.

IC Role / Device Role / Timing Role: Deterministic, jitter-tolerant memory delivering stimulus/response vectors at 500 MHz to parallel DUT interfaces.

Use Value: QVLD signal and echo clocks eliminate need for external strobe generation - reduces ATE channel count and improves test repeatability.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY7C2663KV18-500BZXC	500 MHz, ×18 organization (36 Mbit), no ODT, 165-ball FBGA (13 × 15 mm)	Lacks on-die termination; requires external termination resistors; lower density limits use in full 72-Mbit buffer designs.	Select when ODT is unnecessary and system layout accommodates discrete termination; verify timing margins without DLL/PLL assist.
R1QDA7236ABB-20IA0	Identical pinout, package, and electrical specs; same R1QD-series ODT/latency configuration - confirmed drop-in replacement per Renesas documentation.	No functional difference; identical industrial temp rating, timing, and feature set.	Valid alternative only if marked as R1QDA7236ABB-20IA0; not a generic substitution - exact match per part numbering rules.

Compared with CY7C2663KV18-500BZXC, R1QAA7236ABB-20IA0 delivers double density and integrated ODT, reducing BOM count and improving signal integrity; versus R1QDA7236ABB-20IA0, it is functionally identical but reflects Renesas' internal revision coding - both meet identical QDR-II+ timing and industrial qualification standards.

Availability

R1QAA7236ABB-20IA0 is available at Aetrix Electronics and suitable for network packet buffering, telecom line-card memory, and wireless baseband processing requiring stable component supply across extended product lifecycles.

Supply support for R1QAA7236ABB-20IA0 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 infrastructure markets.

The R1QAA72/R1QDA72 series was designed specifically for high-throughput, low-latency memory subsystems in carrier-grade networking and telecom equipment - emphasizing QDR-II+ interoperability, industrial reliability, and system-level signal integrity.

FAQ

What is the maximum operating frequency of the R1QAA7236ABB-20IA0?

The R1QAA7236ABB-20IA0 supports a maximum clock frequency of 500 MHz, corresponding to a 2 ns minimum cycle time. This is validated under industrial temperature conditions (−40°C to +85°C) with VDD = 1.8 V ±0.1 V and VDDQ = 1.5 V, per AC characteristics in Renesas datasheet R10DS0169EJ0011. Operation above this frequency violates timing specifications and may result in data corruption.

Does the R1QAA7236ABB-20IA0 support on-die termination (ODT)?

Yes, the R1QAA7236ABB-20IA0 supports ODT as confirmed by its R1QD-series designation ('D' in position 3 of the part number). It offers two selectable Thevenin-equivalent termination ranges (52–105 Ω and 105–150 Ω) controlled by the ODT pin and calibrated via the ZQ resistor. This eliminates need for external termination components on the data bus.

What is the meaning of "-20IA0" in R1QAA7236ABB-20IA0?

In R1QAA7236ABB-20IA0, "-20" denotes a 500 MHz speed grade (2 ns cycle time), "I" indicates industrial temperature range (−40°C to +85°C), "A0" is Renesas' internal revision code, and "BB" specifies the 13 × 15 mm FBGA package. The "A" in position 4 confirms 1.8 V core supply, and "D" in position 3 confirms ODT enablement and 2.5-cycle read latency.

How does the QVLD signal function in the R1QAA7236ABB-20IA0?

The QVLD signal in R1QAA7236ABB-20IA0 is an output-valid indicator that asserts half a clock cycle before the first read data word and deasserts half a cycle before the last - providing precise timing for receiver sampling. It is edge-aligned with CQ and /CQ, enabling simplified capture logic in FPGA- or ASIC-based memory controllers without additional strobe generation.

Can the R1QAA7236ABB-20IA0 operate without the DLL/PLL enabled?

Yes, the R1QAA7236ABB-20IA0 can operate with DLL/PLL disabled by asserting /DOFF low. This mode supports stable operation down to DC, though AC timing parameters (e.g., tAC, tQV) degrade below 120 MHz. For full-speed operation at 500 MHz, /DOFF must be held high to enable DLL/PLL for optimal output timing margin and jitter suppression.

R1QAA7236ABB-20IA0 Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Programmable:: Not Verified

Memory Type:: -

Memory Format:: -

Technology:: -

Memory Size:: -

Memory Organization:: -

Memory Interface:: -

Clock Frequency:: -

Write Cycle Time - Word, Page:: -

Access Time:: -

Voltage - Supply:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

R1QAA7236ABB-20IA0 FAQ

1.How can I place an order for R1QAA7236ABB-20IA0 through Aetrix?

Please submit a Request for Quotation (RFQ) for R1QAA7236ABB-20IA0 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

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The price and inventory of R1QAA7236ABB-20IA0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1QAA7236ABB-20IA0 is usually 5 days.

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R1QAA7236ABB-20IA0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

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Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for R1QAA7236ABB-20IA0?

For technical support, including R1QAA7236ABB-20IA0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1QAA7236ABB-20IA0 requirements.

6.How does Aetrix verify that R1QAA7236ABB-20IA0 is sourced from the original manufacturer or authorized distributors?

All R1QAA7236ABB-20IA0 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that R1QAA7236ABB-20IA0 meets industry standards.

7.What is the process for return or replacement of R1QAA7236ABB-20IA0?

All R1QAA7236ABB-20IA0 units undergo pre-shipment inspection (PSI). If there is an issue with R1QAA7236ABB-20IA0, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The R1QAA7236ABB-20IA0 part is unused and in its original packaging.

Return procedure for R1QAA7236ABB-20IA0:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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