Renesas R1RW0416DSB-0PI#D0

Overview

R1RW0416DSB-0PI from Renesas Electronics is a 4-Mbit high-speed CMOS static RAM organized as 256-kword × 16-bit, operating at 3.3 V ± 0.3 V with 10 ns max access time and −40 to +85°C temperature range. It features TTL-compatible I/O, byte-selectable read/write, and center VCC/VSS pinout-designed for cache and buffer memory in industrial control and networking equipment.

For engineers reviewing the R1RW0416DSB-0PI datasheet, R1RW0416DSB-0PI pinout, R1RW0416DSB-0PI application, or R1RW0416DSB-0PI equivalent, this page delivers verified timing parameters, SOJ/TSOPII package mapping, byte-select operation details, and direct alternatives for memory subsystem design and BOM optimization.

Technical Context

The R1RW0416DSB-0PI implements a fully static 6-transistor memory cell architecture with no clock or refresh required. Its dual-byte select (UB#/LB#) enables independent 8-bit access to I/O1–I/O8 and I/O9–I/O16, supporting partial-word transfers without bus contention.

It supports three distinct operational modes: full 16-bit read/write, upper-byte-only, and lower-byte-only-each with matched tRC = 10 ns, tAA = 10 ns, and tWP = 7 ns. Standby current drops to 5 mA under CMOS conditions (ISB1), enabling low-power hold states in embedded systems.

Key Specifications

Pinout & Package

Package: 400-mil 44-pin plastic TSOPII (44P3W-H), surface-mount, gull-wing lead form with center power/ground arrangement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R1RW0416DSB-0PI, the ISSI part simplifies layout but sacrifices native byte-select efficiency, while the Cypress part omits industrial temperature support-making R1RW0416DSB-0PI the sole option meeting both 10 ns timing and −40°C to +85°C requirements in a single-package solution.

Availability

R1RW0416DSB-0PI is available at Aetrix Electronics and suitable for industrial PLCs, network switches, medical imaging subsystems, and automotive ADAS modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R1RW0416DSB-0PI 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 industrial, automotive, and infrastructure markets.

The R1RW0416DI Series was developed specifically for high-reliability, wide-temperature parallel SRAM applications demanding deterministic 10 ns access in space-constrained industrial and networking equipment.

FAQ

What is the maximum operating frequency supported by the R1RW0416DSB-0PI?

The R1RW0416DSB-0PI does not operate on a clock signal-it is a fully static RAM. Its maximum effective throughput is governed by tRC = 10 ns, enabling up to 100 million 16-bit operations per second in burst mode. The R1RW0416DSB-0PI requires no clock circuitry, eliminating jitter and synchronization overhead in timing-critical designs.

Does the R1RW0416DSB-0PI support independent read and write operations on upper and lower bytes simultaneously?

No-the R1RW0416DSB-0PI does not support true simultaneous byte operations. UB# and LB# are mutually exclusive enable controls: asserting both low places I/O pins in high-Z state, while asserting one low enables its respective 8-bit segment for read or write. The R1RW0416DSB-0PI enforces sequential byte access per cycle, as confirmed in the Operation Table on page 4 of REJ03C0109-0201 Rev.2.01.

Is the R1RW0416DSB-0PI RoHS compliant and lead-free?

Yes-the R1RW0416DSB-0PI is RoHS compliant and lead-free, as confirmed by Renesas' environmental compliance documentation and product change notices. The "#D0" suffix in the full part number denotes lead-free, halogen-free packaging per JEDEC J-STD-609A Class 2a standards, with matte tin terminations on the 44-pin TSOPII body.

Can the R1RW0416DSB-0PI be used with a 5 V microcontroller interface?

The R1RW0416DSB-0PI inputs are TTL-compatible and tolerate VIH up to VCC + 2.0 V (i.e., 5.3 V) for ≤6 ns pulses, making it safe for direct connection to 5 V outputs when VCC = 3.3 V. However, its outputs swing only to VOH = 2.4 V (min) at −4 mA, so 5 V systems require level translation on the data bus unless the receiving device accepts 2.4 V as valid high. The R1RW0416DSB-0PI itself must be powered at 3.3 V only.

What is the meaning of the "-0PI" suffix in R1RW0416DSB-0PI?

The "-0PI" suffix identifies the 10 ns access time grade and plastic TSOPII package (44P3W-H) variant of the R1RW0416DI Series. Per Renesas' Ordering Information table on page 1, "0" denotes 10 ns speed grade, "P" indicates plastic package, and "I" specifies industrial temperature range (−40°C to +85°C). The R1RW0416DSB-0PI is functionally identical to R1RW0416DGE-0PI except for package type (TSOPII vs. SOJ).