Renesas 71V3556SA150BGG8

Overview

71V3556SA150BGG8 from Renesas is a 128K × 36-bit, 4.5 Mbit, 3.3V synchronous ZBT™ SRAM with zero bus turnaround, 150 MHz clock speed (6.67 ns cycle time), pipelined outputs, and integrated burst counter. It supports interleaved/linear 4-word bursts, individual byte write control (BW1–BW4), and JTAG boundary scan (IEEE 1149.1). Used in high-speed networking line cards and packet buffer subsystems requiring deterministic latency and no dead cycles between read/write transitions.

For engineers reviewing the 71V3556SA150BGG8 datasheet, 71V3556SA150BGG8 pinout, 71V3556SA150BGG8 application, or 71V3556SA150BGG8 equivalent, key selection criteria include ZBT™ timing compliance, 100-pin TQFP or BGA package compatibility, industrial temperature support (–40°C to +85°C), 3.3V core/I/O supply tolerance, and JTAG-enabled testability for production validation.

Technical Context

The 71V3556SA150BGG8 implements a fully synchronous, positive-edge-triggered architecture with registered address, data, and control inputs. Its ZBT™ feature eliminates bus turnaround delay by enabling immediate read-after-write or write-after-read transitions without idle cycles.

It integrates an on-chip burst counter controlled by ADV/LD and LBO pins, supporting both linear and interleaved 4-word sequences. Output enable (OE) is asynchronous, while all other inputs-including R/W, CEN, CE1/CE2/CE2, and BW1–BW4-are synchronized to CLK's rising edge.

Key Specifications

Pinout & Package

71V3556SA150BGG8 is packaged in a 119-ball fine-pitch BGA (BGG119), JEDEC-compliant, 12 mm × 12 mm footprint with 0.8 mm ball pitch. Pinout includes dedicated I/O banks (I/O0–I/O31, I/OP1–I/OP4), three chip enables (CE1, CE2, CE2), and JTAG interface signals (TMS, TDI, TCK, TDO, TRST).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1373KV18 and IS61WV102436B, the 71V3556SA150BGG8 uniquely delivers 150 MHz performance at 36-bit width with full JTAG testability and industrial temperature support-making it the only option meeting combined high-speed, wide-bus, and production-test requirements.

Availability

71V3556SA150BGG8 is available at Aetrix Electronics and suitable for high-speed network line cards, telecom packet buffering systems, and industrial PLC backplanes requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for 71V3556SA150BGG8 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 71V3556SA150BGG8 belongs to Renesas' ZBT™ SRAM product line, engineered specifically for high-performance communications equipment requiring zero bus turnaround, deterministic latency, and robust testability in harsh thermal environments.

FAQ

What is the maximum operating frequency supported by the 71V3556SA150BGG8?

The 71V3556SA150BGG8 is rated for a maximum clock frequency of 150 MHz, corresponding to a 6.67 ns clock cycle time. This is validated across the full industrial temperature range (–40°C to +85°C) and 3.3 V ±5% supply conditions. The device achieves 3.5 ns clock-to-data access time (tCD), enabling tight timing margins in high-speed synchronous systems.

Does the 71V3556SA150BGG8 support JTAG boundary scan, and which pins are used?

Yes, the 71V3556SA150BGG8 supports IEEE 1149.1-compliant JTAG boundary scan. The required pins are TMS (Test Mode Select), TDI (Test Data Input), TCK (Test Clock), TDO (Test Data Output), and optional TRST (JTAG Reset). These signals are assigned to specific balls in the BGG119 package and are functional only in the "SA" variant, as confirmed in the pin configuration diagrams.

How does the ZBT™ feature eliminate dead cycles in the 71V3556SA150BGG8?

The ZBT™ (Zero Bus Turnaround) feature in the 71V3556SA150BGG8 removes idle cycles between successive read and write operations by overlapping bus control transitions. When a write completes, the next read begins immediately on the subsequent clock edge-no wait states or turnaround delays are inserted. This is achieved through internal synchronization of R/W, ADV/LD, and CE signals, ensuring deterministic 2-cycle latency regardless of access direction.

What burst modes does the 71V3556SA150BGG8 support, and how is burst order selected?

The 71V3556SA150BGG8 supports 4-word bursts in either linear or interleaved sequence, selected by the LBO (Linear Burst Order) pin. When LBO = LOW, linear addressing (A0, A1, A2, A3) is used; when LBO = HIGH, interleaved order (A0, A2, A1, A3) is applied. Burst initiation and advancement are controlled synchronously via ADV/LD, and the counter wraps automatically after the fourth word.

Is the 71V3556SA150BGG8 available in industrial temperature grade, and what is the specified range?

Yes, the 71V3556SA150BGG8 is qualified for industrial temperature operation from –40°C to +85°C. This rating is explicitly stated in the "Recommended Operating Temperature and Supply Voltage" table and verified across all DC and AC parameters, including access time, setup/hold timing, and JTAG functionality-ensuring reliability in base station, transportation, and factory automation environments.