Renesas R1RW0416DSB-2PI#D1

Overview

R1RW0416DSB-2PI#D1 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 serves as cache or buffer memory in real-time embedded systems requiring wide data bus width and deterministic zero-clock-cycle read/write timing.

For engineers reviewing the R1RW0416DSB-2PI#D1 datasheet, R1RW0416DSB-2PI#D1 pinout, R1RW0416DSB-2PI#D1 application, or R1RW0416DSB-2PI#D1 equivalent, key selection criteria include byte-selectable I/O (UB#/LB#), TTL-compatible interface levels, 44-pin TSOPII package footprint, and dual standby current modes (40mA TTL / 5mA CMOS).

Technical Context

The R1RW0416DSB-2PI#D1 implements a fully static 6-transistor memory cell architecture with no clock or refresh required. Its control logic supports independent upper- and lower-byte write/read via dedicated UB# and LB# inputs, enabling partial-word transfers without external gating.

It features center VCC/VSS pinout for low-noise power distribution and operates under strict DC conditions: VIH ≥2.0V, VIL ≤0.8V, and output drive capability of VOH ≥2.4V at −4mA and VOL ≤0.4V at 8mA - ensuring robust interfacing with legacy TTL and mixed-voltage 3.3V systems.

Key Specifications

Pinout & Package

Package: 400-mil 44-pin plastic Thin Small Outline Package II (TSOPII), surface-mount, lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY62148EV30LL-45ZSXI and IS61WV25616EDBLL-10MLI, the R1RW0416DSB-2PI#D1 uniquely balances 12ns performance, 44-pin TSOPII compactness, and industrial temperature support - making it optimal for space-constrained, thermally demanding embedded systems where timing and footprint are co-constrained.

Availability

R1RW0416DSB-2PI#D1 is available at Aetrix Electronics and suitable for industrial PLCs, automotive ADAS modules, and medical imaging subsystems requiring stable component supply across extended product lifecycles.

Supply support for R1RW0416DSB-2PI#D1 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 embedded systems needing fast, wide-bus, non-refreshing memory - emphasizing industrial temperature resilience, byte-granular control, and drop-in compatibility with legacy 16-bit bus architectures.

FAQ

What is the maximum access time specification for R1RW0416DSB-2PI#D1?

The R1RW0416DSB-2PI#D1 has a maximum access time of 12 ns under industrial temperature conditions (−40°C to +85°C) and 3.3V ±0.3V supply. This value is measured from address valid to data valid (tAA) and applies to all operating conditions specified in the Renesas datasheet R10DS0283EJ0100 Rev.1.00. The R1RW0416DSB-2PI#D1 achieves this timing using optimized CMOS circuit design without requiring external clocks or timing constraints beyond standard control signal setup/hold windows.

Does R1RW0416DSB-2PI#D1 support partial-word writes?

Yes, the R1RW0416DSB-2PI#D1 supports true 8-bit partial-word writes via dedicated UB# (upper byte) and LB# (lower byte) control inputs. When LB# is asserted low and UB# remains high, only I/O1–I/O8 accept data; conversely, asserting UB# low while LB# stays high writes only to I/O9–I/O16. This functionality is confirmed in the Operation Table and AC Characteristics section of the R1RW0416DSB-2PI#D1 datasheet and requires no external logic or bus arbitration.

What is the standby current consumption of R1RW0416DSB-2PI#D1?

The R1RW0416DSB-2PI#D1 offers two standby current modes: 40 mA maximum in TTL-compatible standby (ISB) and 5 mA maximum in CMOS standby (ISB1). The 5 mA mode activates under specific input bias conditions - CS# held high while all other inputs are either at VSS or within 0.2V of VCC - enabling ultra-low-power retention in battery-backed or energy-sensitive applications. Both values are tested per the DC Characteristics table in the official R1RW0416DSB-2PI#D1 datasheet.

Is R1RW0416DSB-2PI#D1 pin-compatible with other members of the R1RW0416DI Series?

Yes, the R1RW0416DSB-2PI#D1 shares identical 44-pin TSOPII pinout and signal definitions with all R1RW0416DI Series variants, including R1RW0416DGE-2PI and R1RW0416DSB-0PI. Pin functions - A0–A17, I/O1–I/O16, CS#, OE#, WE#, UB#, LB#, VCC, VSS, and NC - are electrically and physically consistent across the family. This allows direct substitution based on access time requirements without PCB modification, provided the target application tolerates the selected timing grade.

What package type does R1RW0416DSB-2PI#D1 use?

The R1RW0416DSB-2PI#D1 uses a 400-mil 44-pin plastic Thin Small Outline Package II (TSOPII), a surface-mount package with gull-wing leads and standardized JEDEC MO-118AC dimensions. This package is explicitly listed in the Ordering Information table of the R1RW0416DSB-2PI#D1 datasheet and differs from the SOJ variant used by R1RW0416DGE-2PI. The TSOPII footprint supports high-density routing and reflow soldering in automated assembly lines.