Renesas 71V3577S75BGI

Overview

71V3577S75BGI from Renesas Electronics is a 128K × 36-bit (4.608 Mb), 3.3V synchronous SRAM with flow-through output architecture, 7.5 ns access time at up to 117 MHz clock frequency, and industrial temperature range (–40°C to +85°C). It supports linear/interleaved burst modes via LBO input, features self-timed write with global and byte-level write enables, and is used in high-speed cache buffers and network packet memory subsystems.

For engineers reviewing the 71V3577S75BGI datasheet, 71V3577S75BGI pinout, 71V3577S75BGI application, or 71V3577S75BGI equivalent, key selection criteria include TQFP-100 package compatibility, 3.3V core/I/O supply, burst counter timing behavior, single-cycle deselect capability, and industrial-grade power-down current (ISB1 = 35 mA).

Technical Context

This SRAM implements a synchronous, register-based address/data path with no output register - enabling true flow-through read latency. The internal burst address counter advances on ADV=LOW and selects sequence order (linear or interleaved) based on static LBO state, with wraparound after four words.

Write control uses hierarchical enable logic: GW overrides BWE, and BWE gates BW1–BW4; all synchronous inputs (CE, CS0, CS1, ADSP, ADSC, ADV, GW, BWE, BWx) are sampled on CLK rising edge with defined setup/hold times. ZZ enables asynchronous sleep mode with guaranteed data retention and 35 µA ISB2 current at fMAX.

Key Specifications

Pinout & Package

71V3577S75BGI is packaged in a 100-pin thin quad flatpack (TQFP), JEDEC MO-140AC, 0.5 mm pitch, 14 mm × 20 mm body size. Pin 1 marked by corner notch; top-side marking includes "71V3577S75BGI" and date code.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1371DV33-7BBXC and AS7C3256P-10JCN, the 71V3577S75BGI uniquely delivers industrial-grade 7.5 ns performance in pin-compatible TQFP packaging with configurable burst sequencing - enabling direct upgrade paths in existing cache and buffer designs without layout change.

Availability

71V3577S75BGI is available at Aetrix Electronics and suitable for network packet buffering, real-time DSP caching, industrial PLC memory modules, and medical imaging frame stores requiring stable component supply across extended product lifecycles.

Supply support for 71V3577S75BGI 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 is a global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.

The 71V3577S series targets high-speed embedded memory subsystems demanding deterministic timing, low-power sleep, and industrial reliability - particularly in networking, test equipment, and real-time control.

FAQ

What is the maximum clock frequency supported by the 71V3577S75BGI at industrial temperature?

The 71V3577S75BGI supports up to 117 MHz clock frequency with 7.5 ns access time across the full industrial temperature range (–40°C to +85°C). This is validated per AC Electrical Characteristics Table 16 in the official Renesas datasheet (Rev. 6.42, Sep 2023), and applies to both 128K × 36 and 256K × 18 configurations in the TQFP package.

Does the 71V3577S75BGI support burst mode, and how is it configured?

Yes, the 71V3577S75BGI supports 4-word synchronous burst mode controlled by ADV and LBO pins. ADV=LOW initiates burst advance; LBO selects linear (LBO=LOW) or interleaved (LBO=HIGH) sequence per Tables 14–15. The burst counter is fully hardware-based and requires no software initialization - the 71V3577S75BGI executes burst reads/writes autonomously once triggered.

What is the function of the ZZ pin on the 71V3577S75BGI, and what power savings does it provide?

The ZZ pin on the 71V3577S75BGI enables asynchronous sleep mode: when driven HIGH, it gates the internal clock and reduces supply current to IZZ = 35 µA (industrial grade). Data retention is guaranteed during sleep. Unlike standby modes requiring chip deselect, ZZ operates independently - allowing the 71V3577S75BGI to enter ultra-low-power state even while selected, critical for energy-sensitive applications.

Can the 71V3577S75BGI operate with different core and I/O voltages?

No - the 71V3577S75BGI requires matched 3.3 V ±5% supplies on both VDD (core) and VDDQ (I/O). The datasheet specifies VDD and VDDQ must track within ±0.1 V (Table 04), and VIH/VIL thresholds are referenced separately to each rail. Operating VDD and VDDQ at different nominal values violates Absolute Maximum Ratings and may cause functional failure or accelerated wear.

Is the 71V3577S75BGI pin-compatible with other devices in the 71V3577/79 family?

Yes - the 71V3577S75BGI shares identical 100-pin TQFP pinout with all speed grades (e.g., 71V3577S85BGI) and configuration variants (128K×36 and 256K×18) in the same package. Pin functions, power/ground locations, and timing interfaces are fully consistent; only AC timing parameters and temperature grading differ. This enables drop-in speed upgrades without PCB modification.