Texas Instruments SN74V3660-10PEU

Overview

SN74V3660-10PEU from Texas Instruments is a 4096 × 36-bit, 3.3-V CMOS synchronous FIFO memory with independent read/write clocks, user-selectable ×36/×18/×9 bus matching, and 166-MHz operation (6-ns read/write cycle time). It supports FWFT or standard timing modes, zero-latency retransmit, and programmable almost-empty/almost-full flags - deployed in high-throughput network buffering and video data alignment systems.

For engineers reviewing the SN74V3660-10PEU datasheet, SN74V3660-10PEU pinout, SN74V3660-10PEU application, or SN74V3660-10PEU equivalent, key selection considerations include bus-width flexibility (×36 in to ×9 out), big-/little-endian byte ordering, 5-V-tolerant inputs, fixed first-word latency, and dual-mode flag timing (synchronous/asynchronous).

Technical Context

This FIFO implements a dual-clock architecture with fully asynchronous WCLK and RCLK domains, enabling simultaneous read/write at up to 166 MHz. Its RAM array is organized as 4096 words × 36 bits, with dedicated input/output registers, pointer logic, and flag generation circuitry supporting both FWFT and standard timing modes.

Bus-matching configuration is determined at master reset via BM, IW, and OW pins - enabling five combinations including ×36→×36, ×36→×18, ×36→×9, ×18→×36, and ×9→×36. Flag behavior (EF/OR, FF/IR, HF, PAE, PAF) is mode-dependent, with PAE/PAF programmable via serial or parallel loading using LD, SEN, WEN, and REN controls.

Key Specifications

Pinout & Package

SN74V3660-10PEU is housed in a 128-pin Thin Quad Flat Pack (TQFP) package with 0.4-mm lead pitch, RoHS-compliant, and rated for 0°C to 70°C industrial operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FIFO memory applications.

Compared with IDT72V3680L15PF and NB3N502FG, SN74V3660-10PEU uniquely combines mid-density buffering (4096 × 36), full bus-matching flexibility, 5-V-tolerant I/O, and zero-latency retransmit - making it optimal for adaptable, mixed-voltage, real-time data path designs where feature completeness matters more than raw depth or lowest cost.

Availability

SN74V3660-10PEU is available at Aetrix Electronics and suitable for network packet buffering, video frame alignment, telecom line card interface, DSP data streaming, and real-time protocol analysis requiring stable component supply and long-term industrial availability.

Supply support for SN74V3660-10PEU 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with decades of leadership in high-performance memory and interface ICs.

SN74V3660-10PEU belongs to TI's high-speed synchronous FIFO product line, engineered specifically for deterministic data buffering in telecom, video, and networking infrastructure where clock domain crossing, bus width conversion, and low-latency retransmission are critical.

FAQ

What is the maximum operating frequency of the SN74V3660-10PEU?

The SN74V3660-10PEU supports up to 166 MHz operation, corresponding to a 6-ns read/write cycle time. This specification is validated across the full industrial temperature range (0°C to 70°C) and applies to both read and write operations under recommended supply conditions (3.3 V ± 0.3 V). The SN74V3660-10PEU achieves this performance using high-speed submicron CMOS technology and optimized internal timing paths.

Does the SN74V3660-10PEU support 5-V logic inputs?

Yes, the SN74V3660-10PEU features 5-V-tolerant inputs on all control and data pins (D0–D35, WEN, REN, MRS, PRS, etc.), allowing direct connection to 5-V TTL or CMOS logic without external level shifters. This tolerance is maintained regardless of VCC level (3.3 V), and applies to both static and dynamic signal conditions per the SCAS668A datasheet.

How does the SN74V3660-10PEU handle bus-width conversion?

The SN74V3660-10PEU supports five bus-matching configurations - including ×36 in to ×36 out, ×36 in to ×18 out, ×36 in to ×9 out, ×18 in to ×36 out, and ×9 in to ×36 out - selected at master reset via BM, IW, and OW pins. This hardware-configured flexibility eliminates external data-width logic and preserves timing integrity across conversions, and the SN74V3660-10PEU maintains full 4096-word depth in all modes.

Can the SN74V3660-10PEU operate in First-Word Fall-Through (FWFT) mode?

Yes, the SN74V3660-10PEU supports FWFT mode, enabled by asserting FWFT/SI high during master reset. In FWFT mode, the first word written to an empty FIFO appears at Q0–Q35 after exactly three RCLK rising edges - without requiring REN assertion. Subsequent reads still require REN, and the SN74V3660-10PEU retains full flag functionality (OR, IR, HF, PAE, PAF) in this mode.

What is the purpose of the Partial Reset (PRS) function in the SN74V3660-10PEU?

The Partial Reset (PRS) input resets the internal read and write pointers to zero and clears the output register, but preserves all programmable settings - including FWFT/standard mode, bus-width configuration, flag offsets, and timing mode selections. This allows safe mid-operation buffer restart in real-time systems without reinitializing configuration, and the SN74V3660-10PEU continues operation with identical functional behavior post-PRS.