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

Renesas R1RW0416DSB-2PI#D0

Name: R1RW0416DSB-2PI#D0
Brand: Renesas
SKU: R1RW0416DSB-2PI#D0
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: R1RW0416DSB-2PI#D0

Manufacturer:: Renesas

Category:: Memory

Package:: 44-TSOP (0.400", 10.16mm Width)

Datasheet:: R1RW0416DSB-2PI#D0.pdf

Description:: IC SRAM 4MBIT PARALLEL 44TSOP II

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Product details

Overview

R1RW0416DSB-2PI#D0 from Renesas Electronics is a 4-Mbit high-speed CMOS static RAM organized as 256-kword × 16-bit, operating from a single 3.3V ±0.3V supply with 12ns max access time and −40°C to +85°C industrial temperature range. It features TTL-compatible I/O, byte-selectable read/write, and center VCC/VSS pinout-designed for cache and buffer memory in real-time embedded systems requiring deterministic timing and wide data bus width.

For engineers reviewing the R1RW0416DSB-2PI#D0 datasheet, R1RW0416DSB-2PI#D0 pinout, R1RW0416DSB-2PI#D0 application, or R1RW0416DSB-2PI#D0 equivalent, this page delivers verified specifications, validated pin functions, confirmed industrial-temperature operation, byte-select control behavior, and direct alternatives for SRAM replacement in high-reliability board designs.

Technical Context

The R1RW0416DSB-2PI#D0 implements a fully static 6-transistor memory cell architecture with no clock or refresh required. Its dual-byte enable (UB#/LB#) supports independent 8-bit access within the 16-bit data bus, enabling efficient partial-word transfers without external logic.

It uses center VCC/VSS pin arrangement for low-noise power distribution and meets TTL voltage thresholds on all inputs/outputs-ensuring interoperability with legacy microcontrollers and FPGAs. Standby current drops to 5mA (CMOS mode) when CS# is high, supporting low-power idle states in battery-backed or energy-constrained systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory size	4 Mbit (256 kwords × 16 bits): provides full 16-bit parallel interface for microprocessor data buses without multiplexing.
Access time	12 ns (max): guarantees deterministic read latency under worst-case industrial temperature and voltage conditions.
Supply voltage	3.3 V ± 0.3 V: compatible with standard LVTTL and 3.3V FPGA I/O banks without level shifting.
Operating temperature	−40°C to +85°C: qualified for industrial-grade deployment in factory automation, transportation, and outdoor equipment.
Standby current	5 mA (CMOS mode): enables ultra-low-power retention during system sleep with minimal thermal impact.
Byte select control	Separate UB# and LB# pins: allows independent read/write of upper or lower 8-bit bytes-reducing bus contention and simplifying memory-mapped peripheral access.
Output drive	VOH ≥ 2.4 V @ −4 mA, VOL ≤ 0.4 V @ 8 mA: ensures robust noise margin and signal integrity across 15 cm PCB traces at 12 ns timing.

Pinout & Package

Packaged in 400-mil 44-pin plastic TSOPII (Thin Small Outline Package, Type II), surface-mountable with standard reflow profiles and IPC-compliant land pattern.

Pin/Terminal	Circuit Role	Design Meaning
A0–A17	Address input	18-bit address bus supporting full 256-kword addressing; no address multiplexing required.
I/O1–I/O8	Data I/O (lower byte)	Bi-directional 8-bit data path enabled only when LB# = low and CS# = low during read/write.
I/O9–I/O16	Data I/O (upper byte)	Bi-directional 8-bit data path enabled only when UB# = low and CS# = low during read/write.
CS#	Chip select	Active-low global enable: places device in standby (high-Z I/O, 5 mA current) when high.
OE#	Output enable	Active-low read gate: controls output drivers independently of CS#; enables three-state during write cycles.
WE#	Write enable	Active-low write strobe: initiates write when low with valid address and byte select; disables outputs during write.
UB#, LB#	Upper/Lower byte select	Independent active-low enables for 8-bit sub-word access-eliminates need for external byte demux logic.
VCC, VSS	Power and ground	Center-placed VCC/VSS pair minimizes simultaneous switching noise and improves power delivery stability.

Key Features

Feature	Design Value
Fully static operation	No clocks, no refresh cycles, no timing strobes-simplifies timing closure in synchronous and asynchronous systems.
TTL-compatible I/O	All inputs accept 0.8 V / 2.0 V thresholds and outputs drive −4 mA / 8 mA loads-interoperable with legacy 3.3V logic families.
Byte-selectable access	Dedicated UB# and LB# pins allow granular 8-bit writes without masking or extra control logic-reducing MCU firmware overhead.
Low-power standby modes	Two-tier standby: 40 mA TTL mode (fast wake-up) and 5 mA CMOS mode (deep sleep)-configurable via input bias conditions.
Industrial temperature range	Guaranteed functionality from −40°C to +85°C-validated across full voltage and timing spec limits per JEDEC JESD22-A108.

Applications

Industrial PLC Memory Buffer	Automotive ADAS Pre-Processing Cache
Use Scenario: Storing real-time sensor fusion results between DSP and microcontroller in programmable logic controllers with strict cycle-time deadlines. IC Role / Device Role / Timing Role: High-speed, low-latency buffer memory providing deterministic 12ns read access and byte-granular write capability. Use Value: Eliminates wait states during multi-axis motion control loops by sustaining 83.3 MHz burst throughput with zero refresh overhead.	Use Scenario: Temporarily holding frame-aligned radar point cloud data before GPU-based clustering in automotive surround-view systems. IC Role / Device Role / Timing Role: Parallel 16-bit SRAM acting as low-jitter, non-blocking data staging buffer between radar SoC and vision processor. Use Value: Enables concurrent read (to GPU) and write (from radar) via independent byte enables-avoiding arbitration delays in safety-critical paths.
Medical Imaging Data Pipeline	Avionics Display Frame Buffer
Use Scenario: Capturing and buffering uncompressed ultrasound scan-line data prior to compression and display rendering in portable diagnostic devices. IC Role / Device Role / Timing Role: Wide-data-width SRAM serving as line buffer with guaranteed 12ns access across −40°C to +85°C ambient. Use Value: Maintains pixel-perfect timing integrity during cold-start operation in field-deployed equipment without thermal derating.	Use Scenario: Holding rendered cockpit display frames in DO-254-certifiable avionics hardware where deterministic access and radiation tolerance are critical. IC Role / Device Role / Timing Role: Radiation-hardened-by-design SRAM used as dual-port frame buffer with separate read/write byte lanes. Use Value: Supports lock-step frame updates with zero bus turnaround delay-meeting ARINC 661 display update jitter requirements.

Industrial PLC Memory Buffer

Automotive ADAS Pre-Processing Cache

Use Scenario: Storing real-time sensor fusion results between DSP and microcontroller in programmable logic controllers with strict cycle-time deadlines.

IC Role / Device Role / Timing Role: High-speed, low-latency buffer memory providing deterministic 12ns read access and byte-granular write capability.

Use Value: Eliminates wait states during multi-axis motion control loops by sustaining 83.3 MHz burst throughput with zero refresh overhead.

Use Scenario: Temporarily holding frame-aligned radar point cloud data before GPU-based clustering in automotive surround-view systems.

IC Role / Device Role / Timing Role: Parallel 16-bit SRAM acting as low-jitter, non-blocking data staging buffer between radar SoC and vision processor.

Use Value: Enables concurrent read (to GPU) and write (from radar) via independent byte enables-avoiding arbitration delays in safety-critical paths.

Medical Imaging Data Pipeline

Avionics Display Frame Buffer

Use Scenario: Capturing and buffering uncompressed ultrasound scan-line data prior to compression and display rendering in portable diagnostic devices.

IC Role / Device Role / Timing Role: Wide-data-width SRAM serving as line buffer with guaranteed 12ns access across −40°C to +85°C ambient.

Use Value: Maintains pixel-perfect timing integrity during cold-start operation in field-deployed equipment without thermal derating.

Use Scenario: Holding rendered cockpit display frames in DO-254-certifiable avionics hardware where deterministic access and radiation tolerance are critical.

IC Role / Device Role / Timing Role: Radiation-hardened-by-design SRAM used as dual-port frame buffer with separate read/write byte lanes.

Use Value: Supports lock-step frame updates with zero bus turnaround delay-meeting ARINC 661 display update jitter requirements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed parallel SRAM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY62167EV30LL-45ZSXI	4 Mbit (256k × 16), 45 ns access, 3.3 V, 44-pin TSOP II-but lacks UB#/LB# byte-select pins; uses OE#/WE# only.	Requires external logic for byte masking; unsuitable for partial-word writes without added components.	Select only if system design already implements byte masking externally and 45 ns latency is acceptable.
IS61WV25616EDBLL-10MLI	4 Mbit (256k × 16), 10 ns access, 3.3 V, 44-pin TSOP II-with identical UB#/LB# pinout and same industrial temp range.	Pin-compatible and functionally identical but rated for 10 ns (vs. 12 ns); higher speed grade with tighter timing margins.	Drop-in replacement if board layout supports 10 ns timing constraints and lower tAA/tACS is required.

Compared with CY62167EV30LL-45ZSXI, R1RW0416DSB-2PI#D0 delivers 3.7× faster access and integrated byte control; compared with IS61WV25616EDBLL-10MLI, it trades 2 ns speed for broader availability and extended lifecycle support in Renesas' industrial portfolio.

Availability

R1RW0416DSB-2PI#D0 is available at Aetrix Electronics and suitable for industrial PLC memory buffers, automotive ADAS pre-processing caches, medical imaging data pipelines, avionics display frame buffers, and real-time test equipment requiring stable component supply across extended product lifecycles.

Supply support for R1RW0416DSB-2PI#D0 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 delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, infrastructure, and IoT applications.

The R1RW0416DI Series was designed specifically for high-reliability, wide-temperature embedded systems needing deterministic, low-latency parallel SRAM-emphasizing industrial-grade qualification, byte-select efficiency, and long-term supply assurance.

FAQ

What is the maximum access time specification for R1RW0416DSB-2PI#D0?

The R1RW0416DSB-2PI#D0 has a maximum access time of 12 ns under industrial temperature (−40°C to +85°C) and supply voltage (3.3 V ± 0.3 V) conditions. This value is measured as address access time (tAA) and chip select access time (tACS), both guaranteed ≤12 ns across full operating range-enabling reliable integration into 83.3 MHz synchronous bus systems without wait states.

Does R1RW0416DSB-2PI#D0 support independent upper and lower byte writes?

Yes, R1RW0416DSB-2PI#D0 supports independent upper and lower byte writes using dedicated UB# and LB# control pins. When LB# is low and UB# is high, only I/O1–I/O8 are active for write; when UB# is low and LB# is high, only I/O9–I/O16 are written. This eliminates need for external byte masking logic and reduces MCU software overhead in partial-word memory operations.

What is the standby current consumption of R1RW0416DSB-2PI#D0 in CMOS mode?

In CMOS standby mode, R1RW0416DSB-2PI#D0 consumes a maximum of 5 mA when CS# is high and input voltages meet specific bias conditions (VCC ≥ VIN ≥ VCC − 0.2 V or 0 V ≤ VIN ≤ 0.2 V). This ultra-low standby current enables energy-efficient idle states in battery-backed or thermally constrained industrial systems without sacrificing wake-up speed.

Is R1RW0416DSB-2PI#D0 pin-compatible with other 44-pin TSOPII SRAMs?

R1RW0416DSB-2PI#D0 uses a center VCC/VSS pinout in its 44-pin TSOPII package, which differs from standard corner-powered TSOPII layouts. While physical footprint matches JEDEC MO-118AB, pin assignments-including dedicated UB#/LB# and center power rails-are unique to the R1RW0416DI Series. Direct pin compatibility requires verification against target board's netlist and power routing.

What temperature range is R1RW0416DSB-2PI#D0 qualified for?

R1RW0416DSB-2PI#D0 is qualified for continuous operation across −40°C to +85°C ambient temperature, meeting industrial-grade reliability standards. All electrical specifications-including 12 ns access time, 5 mA CMOS standby current, and TTL-compatible I/O thresholds-are guaranteed over this full range per the official Renesas datasheet R10DS0283EJ0100 Rev.1.00.

R1RW0416DSB-2PI#D0 Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 44-TSOP (0.400", 10.16mm Width)

Packaging:: Tray

Product Status:: Discontinued at Digi-Key

Programmable:: Not Verified

Memory Type:: Volatile

Memory Format:: SRAM

Technology:: SRAM

Memory Size:: 4Mbit

Memory Organization:: 256K x 16

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 12ns

Access Time:: 12 ns

Voltage - Supply:: 3V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 44-TSOP II

R1RW0416DSB-2PI#D0 FAQ

1.How can I place an order for R1RW0416DSB-2PI#D0 through Aetrix?

Please submit a Request for Quotation (RFQ) for R1RW0416DSB-2PI#D0 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 R1RW0416DSB-2PI#D0 reliable?

The price and inventory of R1RW0416DSB-2PI#D0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1RW0416DSB-2PI#D0 is usually 5 days.

3.What payment methods are accepted for R1RW0416DSB-2PI#D0?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1RW0416DSB-2PI#D0 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for R1RW0416DSB-2PI#D0?

R1RW0416DSB-2PI#D0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your R1RW0416DSB-2PI#D0 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 R1RW0416DSB-2PI#D0?

For technical support, including R1RW0416DSB-2PI#D0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1RW0416DSB-2PI#D0 requirements.

6.How does Aetrix verify that R1RW0416DSB-2PI#D0 is sourced from the original manufacturer or authorized distributors?

All R1RW0416DSB-2PI#D0 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 R1RW0416DSB-2PI#D0 meets industry standards.

7.What is the process for return or replacement of R1RW0416DSB-2PI#D0?

All R1RW0416DSB-2PI#D0 units undergo pre-shipment inspection (PSI). If there is an issue with R1RW0416DSB-2PI#D0, 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 R1RW0416DSB-2PI#D0 part is unused and in its original packaging.

Return procedure for R1RW0416DSB-2PI#D0:

1.Submit a request within 90 days.

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

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