Renesas 71T75802S133PFG8

Overview

71T75802S133PFG8 from IDT (now Renesas) is a 2.5V synchronous ZBT™ SRAM with 512K × 36-bit organization (18 Mbit), supporting 200 MHz operation (3.2 ns clock-to-data access), zero bus turnaround (ZBT), pipelined outputs, and 4-word burst capability. It serves as high-speed buffer/cache in network packet processors and telecom line cards requiring deterministic latency and seamless read/write transitions.

For engineers reviewing the 71T75802S133PFG8 datasheet, 71T75802S133PFG8 pinout, 71T75802S133PFG8 application, or 71T75802S133PFG8 equivalent, key selection criteria include ZBT timing compliance, TQFP-100 package compatibility, 2.5V I/O supply (VDDQ), industrial temperature support (–40°C to +85°C), and JTAG IEEE 1149.1 test interface integration.

Technical Context

The 71T75802S133PFG8 implements a fully synchronous, clock-edge-triggered architecture with registered address, data, and control inputs. Its internal burst counter supports linear or interleaved 4-word sequences controlled by the LBO pin, while ADV/LD determines whether external addresses are loaded or the counter advances.

ZBT functionality eliminates dead cycles between read and write operations via internally synchronized output buffer enable-removing need for external OE timing control. The device uses three chip enables (CE1, CE2, CE2) for depth expansion and includes a synchronous ZZ sleep mode for low-power retention.

Key Specifications

Pinout & Package

71T75802S133PFG8 is packaged in a JEDEC-standard 100-pin thin quad flatpack (TQFP), 14 mm × 20 mm body, 0.5 mm pitch. Pinout conforms to PKG100 configuration for 512K × 36-bit mode per datasheet revision 6.42.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 71T75802S133PFG8, the 71T75602S133PFG8 trades peak bandwidth for lower static/dynamic power, while the CY7C1371BV33-167BAXI offers QDR's dual-data-rate advantage but lacks ZBT's seamless read/write transition-requiring additional control logic.

Availability

71T75802S133PFG8 is available at Aetrix Electronics and suitable for network infrastructure, telecom line cards, and industrial PLCs requiring stable component supply, long-term lifecycle support, and industrial-temperature-grade reliability.

Supply support for 71T75802S133PFG8 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, designs high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.

The 71T75802S133PFG8 belongs to IDT's ZBT™ SRAM product line, engineered specifically for zero-turnaround, burst-capable buffering in high-speed packet processing and real-time control systems.

FAQ

What is the maximum operating frequency of the 71T75802S133PFG8?

The 71T75802S133PFG8 is rated for 200 MHz operation, delivering a 3.2 ns clock-to-data access time. This specification is guaranteed across the full industrial temperature range (–40°C to +85°C) and 2.5 V ±5% supply conditions. The "S133" in the part number denotes speed grade, but the actual validated maximum is 200 MHz per datasheet revision 6.42.

Does the 71T75802S133PFG8 support both 512K×36 and 1M×18 configurations?

Yes, the 71T75802S133PFG8 supports both configurations via pin strapping and address mapping. In 512K×36 mode (default for this variant), A0–A18 are used and A19 is unused. In 1M×18 mode, A0–A19 address 1M words, and data I/O is reconfigured to 18 bits plus two parity bits (I/OP1–I/OP2). Configuration is determined by board-level connections-not firmware.

How does the ZBTTM feature eliminate dead cycles in the 71T75802S133PFG8?

ZBTTM in the 71T75802S133PFG8 removes bus turnaround delays by synchronizing output buffer enable internally-so reads and writes can alternate every clock cycle without tri-state gaps. Unlike conventional SRAMs requiring OE deassertion/reassertion, the 71T75802S133PFG8 uses pipelined outputs and burst counter logic to maintain continuous data flow, enabling true 200 MHz bus utilization.

What is the function of the ADV/LD and LBO pins on the 71T75802S133PFG8?

ADV/LD controls whether the internal burst counter loads a new external address (ADV/LD = LOW) or increments (ADV/LD = HIGH). LBO selects burst order: LOW = linear (0,1,2,3), HIGH = interleaved (0,2,1,3). Both are synchronous inputs sampled on the rising CLK edge and must remain stable during burst sequences to prevent address misalignment in the 71T75802S133PFG8.

Is JTAG boundary scan supported on the 71T75802S133PFG8 in TQFP packaging?

Yes, the 71T75802S133PFG8 includes full IEEE 1149.1-compliant JTAG boundary scan in its TQFP-100 package. Pins TMS, TDI, TCK, and TDO are assigned to pins 38, 39, 43, and 42 respectively (per datasheet drawing 5313 drw 02r). TRST is not implemented in TQFP; it is BGA-only. All JTAG pins have internal pull-ups and require no external biasing.