Renesas 71V3558S133PFG

Overview

71V3558S133PFG from IDT (now Renesas) is a 3.3V synchronous ZBT™ SRAM with 128K × 36-bit organization (4.5 Mbit), 133 MHz clock speed, 3.5 ns clock-to-data access time, zero bus turnaround architecture, and pipelined outputs in a 100-pin TQFP package. It serves as high-speed buffer/cache memory in network packet processors and telecom line cards requiring deterministic read/write interleaving without dead cycles.

For engineers reviewing the 71V3558S133PFG datasheet, 71V3558S133PFG pinout, 71V3558S133PFG application, or 71V3558S133PFG equivalent, key selection criteria include ZBT™ burst timing compliance, 4-word linear/interleaved burst mode support, individual byte write control (BW1–BW4), three-chip-enable depth expansion capability, and industrial temperature range (–40°C to +85°C) operation.

Technical Context

The 71V3558S133PFG implements a fully synchronous, positive-edge-triggered architecture with registered address, data, and control inputs. Its internal burst counter advances on ADV/LD = HIGH, enabling four-cycle data transfers per address load, with sequence order selected by static LBO pin (linear or interleaved).

It features internally synchronized output buffer enable (eliminating OE timing constraints), clock enable (CEN) for full pipeline suspension, and asynchronous OE for output tri-state control. The device supports 3.3V core (VDD) and I/O (VDDQ) supplies with ±5% tolerance and includes optional IEEE 1149.1 JTAG boundary scan (SA variant only).

Key Specifications

Pinout & Package

Packaged in a JEDEC-standard 100-pin plastic thin quad flatpack (TQFP), 14 mm × 20 mm body size, with 0.5 mm pitch. Pin 1 marked by corner notch; top-side marking includes "71V3558S133PFG" and date code.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1356BV133BXC and AS7C33128PFSIG, the 71V3558S133PFG uniquely delivers guaranteed zero bus turnaround, integrated burst counter with LBO-selectable sequencing, and industrial-grade sleep mode - making it optimal for telecom and embedded systems demanding strict timing predictability and power-aware operation.

Availability

71V3558S133PFG is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and network test equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for 71V3558S133PFG 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

IDT (Integrated Device Technology), now part of Renesas Electronics, is a fabless semiconductor company specializing in high-performance timing, memory interface, and RF solutions for communications and computing markets.

The 71V3558S133PFG belongs to IDT's ZBT™ SRAM product line, engineered specifically for zero-latency bus turnaround in high-speed packet processing, switching, and baseband subsystems where deterministic memory access timing is critical.

FAQ

What is the maximum supported clock frequency for the 71V3558S133PFG?

The 71V3558S133PFG is rated for a maximum clock frequency of 133 MHz, corresponding to a 7.5 ns clock period. This specification is validated across the full industrial temperature range (–40°C to +85°C) and under worst-case voltage conditions (VDD/VDDQ = 3.135 V). Operation beyond 133 MHz is not guaranteed and may violate setup/hold timing margins.

Does the 71V3558S133PFG support both linear and interleaved burst modes?

Yes, the 71V3558S133PFG supports both linear and interleaved 4-word burst sequences, selected by the static LBO pin: LBO = LOW configures linear order (A0, A0+1, A0+2, A0+3), while LBO = HIGH selects interleaved order (A0, A0+2, A0+1, A0+3). The LBO state must be stable before and during burst operation.

How does the ZBT™ feature eliminate dead cycles in the 71V3558S133PFG?

The ZBT™ feature in the 71V3558S133PFG removes bus turnaround delays by allowing immediate transition from write to read (or read to write) without idle cycles. This is achieved through internal pipeline staging and synchronized control logic that overlaps address latching and data transfer phases, ensuring continuous bus utilization at full clock rate.

Can the 71V3558S133PFG operate with different voltages on VDD and VDDQ?

Yes, the 71V3558S133PFG supports independent 3.3 V ±5% supplies: VDD powers the core logic and address/control registers, while VDDQ powers the I/O buffers and data path. This separation allows noise isolation between logic and I/O domains and supports mixed-voltage system integration, provided both rails ramp monotonically and stay within specified tolerances.

Is JTAG boundary scan available on the 71V3558S133PFG?

No, JTAG boundary scan (IEEE 1149.1) is only available on the "SA" variant (e.g., 71V3558SA), not on the "S" version like the 71V3558S133PFG. The 71V3558S133PFG omits TMS, TDI, TCK, TDO, and TRST pins; these are marked NC in its pinout and are not functional.