Renesas R1LP0408CSB-5UC#D0

Overview

R1LP0408CSB-5UC#D0 from Renesas Electronics is a 4-Mbit CMOS static RAM organized as 512-kword × 8-bit, operating from a single 5 V ±10% supply. It delivers 55 ns max access time, 4 µW typical standby current, and TTL-compatible I/O - enabling low-power, battery-backed data retention in embedded controllers and industrial instrumentation.

For engineers reviewing the R1LP0408CSB-5UC#D0 datasheet, R1LP0408CSB-5UC#D0 pinout, R1LP0408CSB-5UC#D0 application, or R1LP0408CSB-5UC#D0 equivalent, key selection criteria include its 32-pin TSOP II package, 55 ns read/write cycle timing, active current of ≤3 mA at 5 V, and guaranteed operation from −20°C to +70°C.

Technical Context

This SRAM uses a 6-transistor memory cell architecture with fully static operation - no clocks, refresh cycles, or timing strobes required. Its timing is governed by asynchronous control signals (CS#, OE#, WE#), supporting equal address-access and cycle times for deterministic bus interfacing.

The device implements a common I/O bus with three-state output drivers, direct TTL-level compatibility on all pins, and dual power modes: active operation with 1.5 mA typical ICC and ultra-low standby with 0.1 mA typical ISB (at +25°C) or 8 µA typical ISB1 (at +40°C).

Key Specifications

Pinout & Package

Package: 400-mil 32-pin plastic TSOP II (32P3Y-H), surface-mount, 0.5 mm pitch, JEDEC MO-141 compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SRAM applications.

Compared with CY62148EV30LL-55ZSXI and IS61LV25616AL-10TLI, the R1LP0408CSB-5UC#D0 uniquely supports 5 V operation with TTL compatibility and 55 ns timing in a compact 32-pin TSOP II - making it the only viable choice for retrofitting legacy 5 V industrial controllers without board rework.

Availability

R1LP0408CSB-5UC#D0 is available at Aetrix Electronics and suitable for industrial data loggers, medical diagnostic monitors, and programmable logic controller I/O modules requiring stable component supply and long-term lifecycle support.

Supply support for R1LP0408CSB-5UC#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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and memory solutions for industrial, automotive, and infrastructure markets.

The R1LP0408C-C Series was designed specifically for low-power, battery-backed SRAM applications in space-constrained industrial and medical equipment - emphasizing reliability, static operation, and 5 V compatibility over high-speed or multi-voltage flexibility.

FAQ

What is the maximum operating frequency supported by the R1LP0408CSB-5UC#D0?

The R1LP0408CSB-5UC#D0 does not use a clock; its performance is defined by timing parameters, not frequency. With 55 ns max access time and 55 ns read/write cycle time, it supports effective bus rates up to ~18 MHz in ideal conditions. Actual throughput depends on controller timing margins and bus protocol overhead - the R1LP0408CSB-5UC#D0 itself imposes no clock requirement.

Does the R1LP0408CSB-5UC#D0 support battery backup operation, and what is the minimum VCC for data retention?

Yes, the R1LP0408CSB-5UC#D0 supports battery backup operation. Data retention is guaranteed down to VCC = 2 V when CS# is held high, with typical retention current ≤8 µA at +40°C. This allows integration with coin-cell batteries or supercapacitors for extended hold-up time without external power switches - a core design feature confirmed in the R1LP0408CSB-5UC#D0 datasheet Section 12.

Is the R1LP0408CSB-5UC#D0 pin-compatible with other devices in the R1LP0408C-C Series?

Yes, the R1LP0408CSB-5UC#D0 shares identical pinout and footprint with all 32-pin TSOP II variants in the R1LP0408C-C Series, including R1LP0408CSB-7LC and R1LP0408CSC-5SC. Pin assignments for A0–A18, I/O0–I/O7, CS#, OE#, WE#, VCC, and VSS are fully consistent across these variants - enabling drop-in replacement for different speed grades or orientation options.

What are the DC input voltage thresholds for the R1LP0408CSB-5UC#D0 control pins?

Per the R1LP0408CSB-5UC#D0 datasheet Section 5, input high voltage (VIH) is 2.2 V minimum and VCC + 0.3 V maximum; input low voltage (VIL) is −0.3 V minimum and 0.8 V maximum. These thresholds ensure robust TTL compatibility - meaning standard 5 V microcontroller GPIOs and 74LS logic outputs interface directly without level shifters.

How does the R1LP0408CSB-5UC#D0 handle bus contention during write cycles?

The R1LP0408CSB-5UC#D0 avoids bus contention through strict three-state control: I/O pins enter high-impedance immediately upon OE# high or CS# high, regardless of WE# state. During writes, data is latched only when both CS# and WE# are low - and outputs remain disabled unless OE# is also asserted low. This behavior is explicitly defined in the R1LP0408CSB-5UC#D0 Operation Table and timing waveforms.