Renesas 71T75902S75PFGI8

Overview

71T75902S75PFGI8 from IDT (now Renesas) is a 2.5V synchronous ZBT™ SRAM with 1M × 18-bit organization (18,874,368 bits), 7.5 ns clock-to-data access time, flow-through outputs, and integrated burst counter supporting 4-word linear or interleaved bursts. It enables zero-bus-turnaround operation in high-speed packet buffering and network switch fabric applications.

For engineers reviewing the 71T75902S75PFGI8 datasheet, 71T75902S75PFGI8 pinout, 71T75902S75PFGI8 application, or 71T75902S75PFGI8 equivalent, key selection criteria include its 100 MHz system timing capability, synchronous OE-free output control via internal buffer enable, triple chip enable architecture for depth expansion, and IEEE 1149.1 JTAG boundary scan support for production testability.

Technical Context

The 71T75902S75PFGI8 implements a synchronous, clock-driven interface where address/control latching occurs on the rising CLK edge, and data transfer occurs one cycle later. Its ZBT™ architecture eliminates dead cycles between read/write transitions using an advance/load (ADV/LD) signal to manage burst sequencing and address loading.

It features a synchronous 4-word burst counter with LBO-selectable linear/interleaved addressing, individual byte write enables (BW1/BW2), and three chip enables (CE1, CE2 active-low; CE2 active-high) enabling flexible memory depth expansion. Sleep mode (ZZ) and clock enable (CEN) provide dynamic power management without compromising data retention.

Key Specifications

Pinout & Package

Packaged in a JEDEC-standard 100-pin plastic thin quad flatpack (TQFP), 14 mm × 20 mm body, lead pitch 0.5 mm. Pinout validated per IDT document 5319 drw 02a (PKG100).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33 and AS7C31026B, the 71T75902S75PFGI8 uniquely delivers 2.5V ZBT™ operation with JTAG testability, 7.5 ns access, and selectable burst modes - making it optimal for new designs requiring low-latency, testable, and thermally robust packet memory.

Availability

71T75902S75PFGI8 is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, and industrial PLC data logging requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 71T75902S75PFGI8 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, specializes in high-performance timing, memory, and interface solutions for communications and computing infrastructure.

The 71T75902S75PFGI8 belongs to IDT's ZBT™ SRAM product line, engineered specifically for zero-latency, high-throughput data buffering in networking, telecom, and real-time embedded systems.

FAQ

What is the maximum operating frequency of the 71T75902S75PFGI8?

The 71T75902S75PFGI8 supports a maximum clock frequency of 100 MHz, corresponding to a minimum clock cycle time (tCYC) of 10 ns. This is validated under commercial and industrial temperature conditions with VDD and VDDQ at 2.5 V ±5%. The 7.5 ns clock-to-data access time (tCD) ensures deterministic timing for high-speed packet processing applications.

Does the 71T75902S75PFGI8 support both linear and interleaved burst modes?

Yes, the 71T75902S75PFGI8 supports both linear and interleaved 4-word burst sequences. The LBO (Linear/Interleaved Burst Order) pin selects the mode: LBO = LOW enables linear addressing (A0, A1, A2, A3), while LBO = HIGH enables interleaved addressing (A0, A1, A2, A3 in bit-reversed order). This flexibility accommodates different cache line and DMA engine requirements.

How does the ZBT™ architecture eliminate bus turnaround delays in the 71T75902S75PFGI8?

The 71T75902S75PFGI8 achieves zero bus turnaround by decoupling address loading from data transfer using the ADV/LD signal. When ADV/LD = LOW, a new external address is loaded; when ADV/LD = HIGH, the internal burst counter advances. This allows immediate transition between read and write cycles without inserting idle cycles - a key advantage over conventional pipelined SRAMs.

What power-saving modes are available on the 71T75902S75PFGI8?

The 71T75902S75PFGI8 offers four distinct power states: active operation (IDD ≤ 295 mA), deselected standby (ISB1 ≤ 60 mA), clock-running standby (ISB2 ≤ 125 mA), and full sleep mode (IZZ ≤ 60 mA). Sleep mode is entered synchronously via the ZZ pin and maintains full data retention while minimizing current draw - critical for energy-constrained deployments.

Is JTAG boundary scan supported on the 71T75902S75PFGI8, and which package includes TRST?

Yes, the 71T75902S75PFGI8 includes full IEEE 1149.1-compliant JTAG boundary scan with TMS, TDI, TCK, and TDO pins. The optional TRST (JTAG reset) pin is available only in the 119-ball BGA package (BG119/BGG119), not in the 100-pin TQFP variant. In TQFP, JTAG reset occurs automatically at power-up or via TMS/TCK sequences per IEEE 1149.1.