Renesas 71T75802S166PFG

Overview

71T75802S166PFG from IDT (now Renesas) is a 2.5V synchronous ZBT™ SRAM with 512K × 36-bit or 1M × 18-bit configurable memory organization, 200 MHz operation (3.2 ns clock-to-data access), zero bus turnaround architecture, and pipelined burst outputs. 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 71T75802S166PFG datasheet, 71T75802S166PFG pinout, 71T75802S166PFG application, or 71T75802S166PFG equivalent, key selection criteria include ZBT™ burst sequencing (linear/interleaved), 4-word burst capability, JTAG IEEE 1149.1 compliance, 2.5V core/I/O supply, and industrial temperature support (–40°C to +85°C).

Technical Context

The 71T75802S166PFG implements a fully synchronous, clock-edge-triggered architecture with registered address, control, and data paths. Its ZBT™ logic eliminates dead cycles between consecutive reads and writes by overlapping bus turnaround with internal memory access.

Burst operations are managed by an on-chip counter controlled via ADV/LD and LBO pins, supporting both linear and interleaved sequences. The device integrates asynchronous OE for output tri-state control and synchronous CEN for clock gating, enabling precise power management without disrupting register states.

Key Specifications

Pinout & Package

Packaged in a JEDEC-standard 100-pin thin quad flatpack (TQFP), 14 mm × 20 mm body, lead pitch 0.5 mm. Pinout validated per IDT document 5313 drw 02ra for 1M × 18 configuration (71T75802 PKG100).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1315KV18 and AS7C33128PFSIG, the 71T75802S166PFG delivers unique ZBTTM bus efficiency and IEEE 1149.1 testability in a 2.5V industrial-grade package - making it optimal for deterministic, high-bandwidth buffering where timing control and production testability are critical.

Availability

71T75802S166PFG is available at Aetrix Electronics and suitable for packet buffering, network processor caching, and telecom line card applications requiring stable component supply, long-term lifecycle assurance, and industrial temperature qualification.

Supply support for 71T75802S166PFG 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 timing, memory interface, and high-performance logic solutions.

The 71T75802S166PFG belongs to IDT's ZBT™ SRAM product line, designed specifically for high-speed networking and communications infrastructure where deterministic latency, burst efficiency, and robust testability are essential.

FAQ

What memory configurations does the 71T75802S166PFG support?

The 71T75802S166PFG supports two pin-compatible memory configurations: 512K × 36 bits and 1M × 18 bits. Configuration is determined by address pin usage (A0–A18 for 512K × 36; A0–A19 for 1M × 18) and data bus connection - no internal mode register or software setting is required. Both modes operate at full 200 MHz speed with identical timing parameters.

How does the ZBTTM feature improve system performance in the 71T75802S166PFG?

The ZBTTM (Zero Bus Turnaround) feature in the 71T75802S166PFG eliminates idle cycles between consecutive read and write operations by overlapping bus direction control with memory access. This allows immediate back-to-back transactions without wait states, increasing effective bus utilization by up to 30% in burst-intensive applications like packet switching - a benefit confirmed in IDT's functional timing diagrams and truth tables.

What is the role of the ADV/LD and LBO pins in the 71T75802S166PFG?

In the 71T75802S166PFG, ADV/LD is a synchronous control pin that determines whether the internal burst counter loads a new external address (ADV/LD = LOW) or increments (ADV/LD = HIGH). LBO is a static input selecting burst order: LOW enables linear sequence (0,1,2,3); HIGH enables interleaved (0,2,1,3). Both are essential for configuring burst behavior without firmware intervention.

Does the 71T75802S166PFG support JTAG boundary scan, and how is it implemented?

Yes, the 71T75802S166PFG includes a fully IEEE 1149.1-compliant JTAG boundary scan interface with TMS, TDI, TCK, TDO, and optional TRST pins. Pins are located on the 100-pin TQFP package (pins 38–43), internally pulled to VDD (TMS/TDI/TCK/TRST) or VSS (ZZ). The TAP controller enables production test, interconnect verification, and in-system debugging without requiring additional test circuitry.

What power management features are available in the 71T75802S166PFG?

The 71T75802S166PFG offers two power management features: Clock Enable (CEN) and Sleep Mode (ZZ). CEN suspends all synchronous operation while holding register states; ZZ gates the internal clock and reduces current to data-retention levels. Both are synchronous inputs with defined setup/hold timing, and data integrity is guaranteed in both low-power states across the full industrial temperature range.