My Inquiry
My Account
Renesas R1QDA7218ABG-19IB0
- Part No.:
- R1QDA7218ABG-19IB0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- -
- Datasheet:
-
R1QDA7218ABG-19IB0.pdf
- Description:
- STANDARD SRAM, 4MX18, 0.45NS
- Quantity:
- Payment:
- Shipping:
Inventory:441
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
R1QDA7218ABG-19IB0 from Renesas Electronics is a 72-Mbit QDR™II+ SRAM with 4,194,304-word × 18-bit organization, synchronous quad data rate interface, 2.5-cycle read latency, and on-die termination (ODT). It operates at up to 533 MHz (1.875 ns cycle time), uses 1.8 V core (VDD) and 1.4–1.5 V I/O (VDDQ) supplies, and targets high-bandwidth packet buffering in network switches and routers.
For engineers reviewing the R1QDA7218ABG-19IB0 datasheet, R1QDA7218ABG-19IB0 pinout, R1QDA7218ABG-19IB0 application, or R1QDA7218ABG-19IB0 equivalent, key selection criteria include burst-of-4 DDR timing, HSTL I/O compatibility, programmable output impedance via ZQ, QVLD data-valid signaling, and industrial temperature support (−40°C to +85°C).
Technical Context
This device implements a true dual-port synchronous architecture with independent read and write data paths, enabling concurrent transactions without arbitration. Its internal burst counter and full CMOS six-transistor memory cell deliver deterministic 4-word burst access aligned to K and /K clock edges.
The R1QDA7218ABG-19IB0 integrates a DLL for wide output data valid window scaling, JTAG 1149.1 test access, and ODT with selectable Thevenin-equivalent termination (52–150 Ω) controlled by the ODT pin and ZQ resistor. Clock-stop capability enables μs-scale restart after low-power suspension.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 72 Mbit (4,194,304 × 18) |
| Max Frequency | 533 MHz - supports 1.066 GT/s effective data rate per pin |
| Read Latency | 2.5 cycles - determines minimum address-to-data delay in clock cycles |
| Supply Voltages | VDD = 1.8 V ±0.1 V (core); VDDQ = 1.4–1.5 V (I/O buffer supply) |
| Burst Length | 4 words - reduces address bus frequency by 4× versus single-word access |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded networking hardware |
| I/O Standard | HSTL Class I - ensures signal integrity on high-speed PCB traces with matched termination |
| Package | 165-pin FBGA (15 mm × 17 mm × 1.4 mm) - compatible with standard BGA reflow profiles |
Pinout & Package
Package: 165-ball plastic FBGA (15 × 17 mm, 0.8 mm pitch, 1.4 mm height), RoHS-compliant, Pb-free, tray packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| K, /K | Primary input clock pair | Registers all address/control inputs on rising edge of K; registers write data on both rising edges of K and /K |
| /R, /W | Synchronous read/write strobes | Edge-triggered commands initiating burst-of-4 operations; /R takes precedence over /W when asserted simultaneously |
| SA[19:0] | Address inputs | 20-bit address bus supporting 4M-word depth; internally expanded to generate burst sequence A, A+1, A+2, A+3 |
| D[17:0] | Write data inputs | 18-bit parallel input path synchronized to K and /K rising edges; supports byte-write via /BW0 and /BW1 |
| Q[17:0] | Read data outputs | 18-bit parallel output path edge-aligned to CQ and /CQ (or K and /K if C/C# tied high); QVLD indicates valid window |
| QVLD | Data validity indicator | Output pulse active half-cycle before first read data and deasserted half-cycle before last - simplifies capture in FPGA/ASIC receivers |
| ODT | On-die termination control | Configures Thevenin termination resistance (52–150 Ω) for D[17:0] inputs; required for impedance-matched high-speed routing |
| ZQ | Output impedance calibration reference | Connects to precision resistor (RQ) to set Q[17:0] driver strength and track ODT value; RQ = 5 × target ZOUT |
| VDD, VDDQ, VSS, VREF | Power and reference supplies | VDD powers core logic; VDDQ powers I/O buffers; VREF sets HSTL input threshold at ~VDDQ/2; all must be decoupled locally |
| TCK, TMS, TDI, TDO | JTAG boundary-scan interface | IEEE 1149.1 compliant test access port; supports production testing and debug; TCK must tie to VSS if unused |
Key Features
| Feature | Design Value |
|---|---|
| Quad Data Rate II+ interface | Enables 4-word burst per 2-clock cycle - doubles effective bandwidth vs. DDR without increasing clock frequency |
| Programmable output impedance | ZQ pin allows precise matching to PCB trace impedance (±15% tolerance) using external resistor, reducing signal reflections |
| On-die termination (ODT) | Configurable 52–150 Ω Thevenin termination on data inputs eliminates need for external resistors and saves board space |
| QVLD data-valid signal | Provides explicit timing window for data capture - removes dependency on echo clocks alone and improves setup/hold margin |
| Industrial temperature range | Rated for −40°C to +85°C operation - suitable for uncontrolled environments in telecom infrastructure and industrial controllers |
| Low-latency clock-stop mode | Enters standby with clocks halted and resumes in <1 µs - ideal for dynamic power gating in bursty traffic applications |
Applications
| Network Packet Buffering | High-Speed Test Equipment Memory |
|---|---|
|
Use Scenario: Storing ingress/egress packet headers and payloads in Layer 2/3 switches during line-rate forwarding. IC Role / Device Role / Timing Role: Dual-port SRAM serving as shared buffer between ingress parser and egress scheduler, with concurrent read/write enabled by separate Q/D buses. Use Value: 533 MHz operation and 2.5-cycle latency ensure sub-5 ns access time, meeting strict 10 Gbps+ switching fabric timing budgets. |
Use Scenario: Capturing high-fidelity waveform samples in automated test equipment (ATE) during multi-GHz signal analysis. IC Role / Device Role / Timing Role: High-bandwidth data acquisition buffer interfacing directly to ADC/DAC FPGAs via HSTL I/O. Use Value: Burst-of-4 reads minimize address overhead, while QVLD and DLL-calibrated outputs guarantee clean data capture at >1 GSample/s rates. |
| Telecom Baseband Processing | Real-Time Video Frame Buffering |
|
Use Scenario: Temporary storage of OFDM symbol data between FFT processing stages in 4G/5G baseband units. IC Role / Device Role / Timing Role: Low-latency, deterministic-access memory for pipeline synchronization across multiple DSP cores. Use Value: 1.8 V core voltage and ODT reduce simultaneous switching noise, improving SNR in sensitive RF subsystems. |
Use Scenario: Holding uncompressed 4K video frames during real-time encoding/decoding in broadcast encoders or medical imaging systems. IC Role / Device Role / Timing Role: High-density frame buffer providing 72 Mbit capacity with 18-bit data width optimized for YUV422 pixel packing. Use Value: Independent read/write ports allow seamless frame overlay and motion compensation without memory contention stalls. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar QDR-II+ SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C2665KV18-533BAXI | Same 72-Mbit ×18, 533 MHz, 2.5-cycle RL, but Cypress-branded; no ODT support; uses different ZQ calibration scheme | Lacks ODT - requires external termination resistors; slightly higher layout complexity and power in high-frequency designs | Choose when legacy Cypress ecosystem compatibility is required and ODT is not needed. |
| AS7C362000PFS-533BIN | 72-Mbit ×18 QDR-II+, 533 MHz, 2.5-cycle RL, but Alliance Memory; supports ODT and ZQ, but rated only to +70°C (commercial temp) | Not qualified for industrial temperature - unsuitable for outdoor telecom or factory-floor deployments | Choose for cost-sensitive commercial applications where ambient temperature stays below 70°C. |
Compared with CY7C2665KV18-533BAXI and AS7C362000PFS-533BIN, the R1QDA7218ABG-19IB0 uniquely combines industrial temperature rating, ODT, and Renesas' validated QDR-II+ timing compliance - making it the preferred choice for mission-critical infrastructure requiring long-term reliability and signal integrity.
Availability
R1QDA7218ABG-19IB0 is available at Aetrix Electronics and suitable for network switch buffering, telecom baseband processing, high-speed test equipment memory, and real-time video frame buffering requiring stable component supply across extended product lifecycles.
Supply support for R1QDA7218ABG-19IB0 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 R1QDA72 series belongs to Renesas' high-performance QDR-II+ SRAM product line, designed specifically for deterministic, low-latency, high-bandwidth memory applications in networking and communications equipment.
FAQ
What is the maximum operating frequency of the R1QDA7218ABG-19IB0?
The R1QDA7218ABG-19IB0 is rated for a maximum operating frequency of 533 MHz, corresponding to a minimum cycle time of 1.875 ns. This speed is guaranteed under industrial temperature conditions (−40°C to +85°C) and with proper power supply decoupling and signal integrity implementation. The R1QDA7218ABG-19IB0 achieves this performance using its dual-edge clocking architecture and integrated DLL for timing margin optimization.
Does the R1QDA7218ABG-19IB0 support on-die termination (ODT)?
Yes, the R1QDA7218ABG-19IB0 supports on-die termination (ODT) on its data input pins (D[17:0]). ODT is controlled by the ODT pin and calibrated via the ZQ pin, offering selectable Thevenin-equivalent termination resistance ranging from 52 Ω to 150 Ω. This feature eliminates the need for external termination resistors and improves signal integrity in high-speed routing - a key capability confirmed in the device's datasheet revision 0.08a.
What is the purpose of the QVLD signal on the R1QDA7218ABG-19IB0?
The QVLD (Q Valid) signal on the R1QDA7218ABG-19IB0 is an output that explicitly indicates the window during which read data on Q[17:0] is valid. It asserts half a clock cycle before the first data word and deasserts half a cycle before the last, aligning with CQ and /CQ edges. This provides precise timing information to receiving logic - especially valuable in FPGA-based systems - and reduces reliance on echo clock jitter margins. The R1QDA7218ABG-19IB0 implements QVLD as a standard feature in QDR-II+ mode.
What voltage supplies are required for the R1QDA7218ABG-19IB0?
The R1QDA7218ABG-19IB0 requires two distinct power supplies: VDD = 1.8 V ±0.1 V for the core logic, and VDDQ = 1.4 V to 1.5 V for the I/O buffers. VREF must be supplied at approximately VDDQ/2 (0.68 V to 0.75 V typical) to bias HSTL input receivers. All supplies must be properly decoupled, and the recommended power-up sequence is VSS → VDD → VDDQ & VREF → control signals. This supply configuration is specified in the R1QDA7218ABG-19IB0's DC Operating Conditions table.
Is the R1QDA7218ABG-19IB0 compatible with industrial temperature requirements?
Yes, the R1QDA7218ABG-19IB0 is fully qualified for industrial temperature operation from −40°C to +85°C, as indicated by the "I" suffix in its part number (R1QDA7218ABG-19IB0). This qualification covers all AC and DC specifications, including timing parameters, drive strength, and ODT behavior. The device meets Renesas' industrial-grade reliability standards and is intended for deployment in telecom infrastructure, industrial automation, and other harsh-environment applications where commercial-grade parts would fail.
R1QDA7218ABG-19IB0 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:
- -
R1QDA7218ABG-19IB0 FAQ
1.How can I place an order for R1QDA7218ABG-19IB0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1QDA7218ABG-19IB0 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for R1QDA7218ABG-19IB0 reliable?
The price and inventory of R1QDA7218ABG-19IB0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1QDA7218ABG-19IB0 is usually 5 days.
3.What payment methods are accepted for R1QDA7218ABG-19IB0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1QDA7218ABG-19IB0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1QDA7218ABG-19IB0?
R1QDA7218ABG-19IB0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1QDA7218ABG-19IB0 order is processed, you will receive an email with the shipment details and tracking number.
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 R1QDA7218ABG-19IB0?
For technical support, including R1QDA7218ABG-19IB0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1QDA7218ABG-19IB0 requirements.
6.How does Aetrix verify that R1QDA7218ABG-19IB0 is sourced from the original manufacturer or authorized distributors?
All R1QDA7218ABG-19IB0 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 R1QDA7218ABG-19IB0 meets industry standards.
7.What is the process for return or replacement of R1QDA7218ABG-19IB0?
All R1QDA7218ABG-19IB0 units undergo pre-shipment inspection (PSI). If there is an issue with R1QDA7218ABG-19IB0, 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 R1QDA7218ABG-19IB0 part is unused and in its original packaging.
Return procedure for R1QDA7218ABG-19IB0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1QDA7218ABG-19IB0 Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
