Texas Instruments SN74V293-6GGM

Overview

SN74V293-6GGM from Texas Instruments is a 65536 × 18/131072 × 9, 3.3-V CMOS first-in, first-out (FIFO) memory with independent read/write clocks, user-selectable ×9/×18 bus sizing, and FWFT/standard timing modes. It delivers 166-MHz operation, 6-ns read/write cycle time, and zero-latency retransmit for high-throughput buffering in DSP interfacing and telecom data pipelines.

For engineers reviewing the SN74V293-6GGM datasheet, SN74V293-6GGM pinout, SN74V293-6GGM application, or SN74V293-6GGM equivalent, key selection criteria include its 80-pin TQFP package, 5-V-tolerant inputs, programmable almost-empty/almost-full flags with eight default offsets, big/little-endian byte formatting, and glueless interface capability with TI 'C6x DSPs.

Technical Context

The SN74V293-6GGM implements dual-clock asynchronous FIFO architecture with fully independent RCLK and WCLK domains-each operable from DC to 166 MHz-with no frequency ratio constraints. Its RAM array is sized at 65536 × 18 (or 131072 × 9), supporting flexible bus-matching via IW/OW control pins during master reset.

It integrates configurable flag logic including EF/OR, FF/IR, HF, PAE, and PAF; all programmable via serial (FWFT/SI + SEN) or parallel (Dn + WEN) methods. Retransmit is initiated by RT on RCLK edge with zero-latency mode selectable via RM pin, and byte ordering is set by BE pin during MRS.

Key Specifications

Pinout & Package

SN74V293-6GGM is packaged in an 80-pin Thin Quad Flat Pack (TQFP), GGM suffix, with 0.5-mm pitch and exposed thermal pad. Pin functions are validated per TI SCAS669D datasheet Figure 1 and Table 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V2105L15PF and NB3N502MNG, SN74V293-6GGM provides the deepest buffer (65536 × 18), fastest timing (6 ns), and richest configurability-including FWFT, zero-latency retransmit, 5-V tolerance, and endian control-making it optimal for demanding DSP, telecom, and video systems requiring deterministic, expandable buffering.

Availability

SN74V293-6GGM is available at Aetrix Electronics and suitable for telecom infrastructure, DSP-based signal processing, high-definition video equipment, and industrial protocol gateways requiring stable component supply and long-term manufacturability.

Supply support for SN74V293-6GGM 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 experience in high-speed interface and memory products.

The SN74V293-6GGM belongs to TI's high-speed FIFO family designed specifically for glueless, low-latency data buffering between mismatched buses in DSP, networking, and video systems-emphasizing configurability, clock independence, and robust flag signaling.

FAQ

What is the maximum operating frequency of the SN74V293-6GGM?

The SN74V293-6GGM supports up to 166 MHz on both read and write clocks, enabling high-throughput data transfer in real-time systems. This frequency rating is guaranteed across commercial temperature range and 3.3-V supply, with 6-ns read/write cycle time verified under worst-case conditions per TI SCAS669D datasheet.

Does the SN74V293-6GGM support 5-V logic inputs?

Yes, the SN74V293-6GGM features 5-V-tolerant inputs on all control and data pins (D0–D17, WEN, REN, MRS, etc.), allowing direct interface with 5-V microcontrollers, FPGAs, or legacy logic without external level shifters-while maintaining 3.3-V internal core operation.

How does the FWFT mode function in the SN74V293-6GGM?

In FWFT mode, enabled by high FWFT/SI during master reset, the first word written to an empty SN74V293-6GGM appears on Q0–Q17 outputs after exactly three RCLK rising edges-even if REN remains high. Subsequent words require REN assertion, making FWFT ideal for minimizing initial read latency in streaming applications.

Can the SN74V293-6GGM be used to expand FIFO depth beyond 65536 words?

Yes, the SN74V293-6GGM supports depth expansion via FWFT-mode chaining: connect Q outputs of one device directly to D inputs of the next. No external logic is needed, as the OR/IR flags and automatic handshaking enable seamless cascading of multiple SN74V293-6GGM units for >65536-word buffering.

What is the purpose of the BE (Big Endian/Little Endian) pin on the SN74V293-6GGM?

The BE pin configures byte ordering during ×18-to-×9 read operations: low selects big-endian (MSB-first), high selects little-endian (LSB-first). This setting is latched during master reset and ensures correct word reconstruction when splitting 18-bit data into two 9-bit transfers-critical for protocol-compliant data handling.