Texas Instruments SN74V273-15GGM

Overview

SN74V273-15GGM from Texas Instruments is a 16384 × 18 / 32768 × 9, 3.3-V CMOS first-in, first-out (FIFO) memory with independent read/write clocks, 166-MHz operation, 6-ns read/write cycle time, and user-selectable ×9/×18 bus sizing - deployed in high-throughput DSP interfacing and telecom data buffering.

For engineers reviewing the SN74V273-15GGM datasheet, SN74V273-15GGM pinout, SN74V273-15GGM application, or SN74V273-15GGM equivalent, key selection criteria include FWFT vs. standard timing mode configuration, programmable almost-empty/full flag offsets, big/little-endian byte ordering, zero-latency retransmit capability, and 5-V-tolerant input compatibility with legacy logic interfaces.

Technical Context

This FIFO implements dual-clock asynchronous architecture with fully independent RCLK and WCLK domains operating up to 166 MHz, enabling simultaneous read/write without arbitration. Its flexible ×9/×18 port sizing is controlled at master reset via IW and OW pins, supporting mismatched bus widths between upstream and downstream systems.

The device supports two distinct timing modes: First-Word Fall-Through (FWFT), where the first written word appears on Q outputs after three RCLK edges without REN assertion; and standard mode, requiring explicit REN activation for all reads including the first word. Retransmit functionality resets the read pointer to address zero with configurable zero-latency behavior via RM pin.

Key Specifications

Pinout & Package

SN74V273-15GGM is packaged in a 100-pin Ball Grid Array (BGA), GGM package, with 18-bit bidirectional data ports (D0–D17, Q0–Q17), dual clock inputs (WCLK, RCLK), and dedicated flag/control pins including EF/OR, FF/IR, HF, PAE, PAF, MRS, PRS, RT, OE, IW, OW, BE, PFM, RM, and FWFT/SI.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V2105L15PF and NB3N502MNG, SN74V273-15GGM uniquely combines 166-MHz operation, FWFT timing, zero-latency retransmit, and full ×9/×18 bus configurability - making it optimal for high-performance DSP and telecom systems demanding minimal latency and maximum interface adaptability.

Availability

SN74V273-15GGM is available at Aetrix Electronics and suitable for telecom infrastructure, DSP-based signal processing, industrial protocol gateways, video synchronization systems, and high-speed data acquisition requiring stable component supply and long-term lifecycle support.

Supply support for SN74V273-15GGM 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 expertise in high-speed interface ICs and memory products.

The SN74V273-15GGM belongs to TI's high-speed FIFO memory family designed specifically for decoupling asynchronous data domains in network, video, and DSP applications - emphasizing low-latency, flexible bus sizing, and robust flag-driven flow control.

FAQ

What is the memory organization of SN74V273-15GGM?

The SN74V273-15GGM offers dual memory configurations: 16384 × 18 (294,912 bits) or 32768 × 9 (294,912 bits), selected at master reset via IW and OW pin states. This allows system designers to optimize for either data width or depth depending on bus architecture - for example, using ×18 mode to match a wide peripheral interface or ×9 mode to conserve PCB routing layers in space-constrained designs. Both configurations provide identical total bit capacity.

Does SN74V273-15GGM support 5-V logic inputs?

Yes, SN74V273-15GGM features 5-V-tolerant inputs on all control and data pins (D0–D17, WEN, REN, MRS, PRS, RT, OE, IW, OW, BE, PFM, RM, FWFT/SI, FSEL0, FSEL1, LD, SEN), allowing direct interfacing with legacy 5-V TTL or CMOS logic without level shifters. This tolerance applies regardless of VCC = 3.3 V operation and is specified across commercial temperature range. Outputs remain 3.3-V LVTTL compatible.

How does the FWFT mode affect read timing in SN74V273-15GGM?

In FWFT mode, enabled by asserting FWFT/SI high during master reset, the first word written to an empty SN74V273-15GGM appears on Q0–Q17 outputs after exactly three rising edges of RCLK - with no REN assertion required. Subsequent words still require REN = low to be clocked out. This eliminates initial read setup latency, which is critical in pipeline-sensitive applications like real-time video frame capture or DSP bootloading sequences.

Can SN74V273-15GGM be used for depth expansion in cascaded configurations?

Yes, SN74V273-15GGM supports seamless depth expansion via FWFT-mode chaining: the Q outputs of one device connect directly to the D inputs of the next, with shared RCLK and WCLK. No external logic is needed because FWFT ensures the first word from the upstream FIFO appears immediately at the downstream input, maintaining continuous data flow. Standard mode does not support this transparent chaining due to REN dependency.

What is the function of the RM pin on SN74V273-15GGM?

The RM (Retransmit Latency Mode) pin configures retransmit behavior during master reset: a low level selects zero-latency retransmit, causing the first retransmitted word to appear on Q outputs synchronized to the same RCLK edge that sampled RT = low; a high level selects normal-latency retransmit, introducing one additional RCLK cycle delay. This setting persists until next master reset and directly impacts recovery time in packet retransmission or frame replay scenarios.