Texas Instruments SN74V3670-10PEU

Overview

SN74V3670-10PEU from Texas Instruments is a 8192 × 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 SN74V3670-10PEU datasheet, SN74V3670-10PEU pinout, SN74V3670-10PEU application, or SN74V3670-10PEU equivalent, key selection criteria include its 8192-word depth, 36-bit configurable I/O width, dual-clock domain operation, FWFT latency behavior, and 128-pin TQFP package compatibility with industrial backplane and telecom interface designs.

Technical Context

This FIFO implements a dual-port, clock-domain-crossing buffer with fully independent WCLK and RCLK inputs supporting 0–166 MHz operation. Its RAM array is paired with programmable flag logic, offset registers, and bus-matching control logic that interprets BM/IW/OW states during master reset to configure input/output widths.

The device supports two distinct timing architectures: standard mode (EF/FF flags, REN-gated first-word access) and FWFT mode (OR/IR flags, automatic first-word output after three RCLK edges). Retransmit functionality resets the read pointer with either normal or zero-latency response, selected via RM during MRS.

Key Specifications

Pinout & Package

SN74V3670-10PEU 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 ambient operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V3680L15PF and NB3N502DG, SN74V3670-10PEU uniquely delivers FWFT timing, zero-latency retransmit, and full ×36/×18/×9 bus-matching in a single 128-pin TQFP - making it irreplaceable in latency-sensitive, multi-width interface designs requiring >4k-word depth.

Availability

SN74V3670-10PEU is available at Aetrix Electronics and suitable for network packet buffering, video frame synchronization, and telecom line card interface applications requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.

Supply support for SN74V3670-10PEU 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.

The SN74V3670-10PEU belongs to TI's high-speed synchronous FIFO product line, engineered specifically for clock-domain bridging in telecommunications, networking, and digital video infrastructure where deterministic latency and flexible bus sizing are mandatory.

FAQ

What is the memory organization of the SN74V3670-10PEU?

The SN74V3670-10PEU implements an 8192 × 36-bit first-in, first-out memory array, delivering 294,912 bits of total storage. This configuration is fixed per device variant and confirmed in TI's SCAS668A datasheet. The SN74V3670-10PEU does not support dynamic reconfiguration of depth; width adaptation occurs only via bus-matching control pins (BM/IW/OW) during master reset.

Does the SN74V3670-10PEU support 5-V logic inputs?

Yes, the SN74V3670-10PEU features 5-V-tolerant inputs on all control and data pins (WEN, REN, OE, D0–D35, etc.), allowing direct interfacing with 5-V CMOS or TTL logic while operating from a 3.3-V supply. This tolerance is explicitly specified in the Absolute Maximum Ratings and DC Characteristics sections of the official datasheet for SN74V3670-10PEU.

How does the FWFT mode affect first-word latency in the SN74V3670-10PEU?

In FWFT mode, the first word written to an empty SN74V3670-10PEU appears on Q0–Q35 after exactly three rising edges of RCLK - no REN assertion required. This fixed, low-latency path is hardware-implemented and independent of clock frequency. Subsequent words still require REN activation, preserving deterministic behavior for streaming applications.

Can the SN74V3670-10PEU be expanded in depth using multiple devices?

Yes, the SN74V3670-10PEU supports depth expansion in FWFT mode by chaining outputs to inputs of another identical FIFO. The first-word fall-through behavior enables transparent cascading without external handshaking logic. Standard mode requires additional control logic for depth expansion, as EF/FF flags do not auto-propagate across devices.

What package type is used for the SN74V3670-10PEU?

The SN74V3670-10PEU is supplied in a 128-pin Thin Quad Flat Pack (TQFP) package, designated "PEU" in TI's packaging nomenclature. This RoHS-compliant package has 0.4-mm lead pitch, body size of 14 mm × 14 mm, and is characterized for operation from 0°C to 70°C - consistent across all SN74V36xx family members including SN74V3670-10PEU.