Texas Instruments SN74V263-15GGM

Overview

SN74V263-15GGM from Texas Instruments is a 3.3-V CMOS first-in, first-out (FIFO) memory with 8192 × 18 or 16384 × 9 configurable depth/width, 166-MHz operation, 6-ns read/write cycle time, and user-selectable ×9/×18 bus sizing - deployed in high-speed data buffering for DSP interfacing and telecom line cards.

For engineers reviewing the SN74V263-15GGM datasheet, SN74V263-15GGM pinout, SN74V263-15GGM application, or SN74V263-15GGM equivalent, key selection criteria include FWFT vs. standard timing mode, programmable almost-empty/full flag offsets, independent RCLK/WCLK domains, big/little-endian byte ordering, and zero-latency retransmit capability.

Technical Context

This FIFO implements dual-clock asynchronous operation with fully independent read and write clock domains (RCLK/WCLK), supporting 0–166 MHz frequencies without inter-clock dependency. It integrates a flexible ×9/×18 bus-matching architecture controlled by IW/OW pins during master reset, enabling dynamic port width configuration.

The device features two selectable timing modes: First-Word Fall-Through (FWFT), where the first written word appears on Qn after three RCLK edges without REN assertion; and standard mode, requiring explicit REN + RCLK for all reads including the first word. Retransmit functionality supports zero-latency mode via RM pin configuration.

Key Specifications

Pinout & Package

SN74V263-15GGM is housed in a 100-pin Ball Grid Array (BGA) package designated GGM per TI SCAS669D datasheet. Pin functions are validated per official top-view pinout diagram and terminal description table.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V263, SN74V263-15GGM delivers 25% higher bandwidth and deterministic first-word latency; versus SN74V265, it offers identical core functionality at lower cost where JTAG is unnecessary.

Availability

SN74V263-15GGM is available at Aetrix Electronics and suitable for telecom infrastructure, DSP-based signal processing, and industrial protocol gateway applications requiring stable component supply across multi-year production cycles.

Supply support for SN74V263-15GGM 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 experience in high-speed interface and memory products.

The SN74V263-15GGM belongs to TI's high-speed FIFO family designed specifically for clock-domain isolation and data rate matching in DSP, telecom, and video systems - emphasizing low-latency, configurability, and robust flag signaling.

FAQ

What memory organization does SN74V263-15GGM support?

SN74V263-15GGM supports two memory configurations: 8192 × 18 (147,456 bits) or 16384 × 9 (147,456 bits), selected via IW and OW pin states during master reset. Both configurations deliver identical total bit capacity but differ in data path width - enabling optimization for either wide-bus throughput or narrow-bus compatibility.

Does SN74V263-15GGM support 5-V logic inputs?

Yes, SN74V263-15GGM features 5-V-tolerant inputs on all control and data pins (D0–D17, WEN, REN, MRS, etc.), allowing direct interfacing with 5-V microcontrollers or FPGAs without external level-shifting circuitry - a key advantage in mixed-voltage system designs.

How does the FWFT mode affect first-word latency in SN74V263-15GGM?

In FWFT mode, the first word written to an empty SN74V263-15GGM appears on Q0–Q17 outputs after exactly three RCLK rising edges - with no REN assertion required. This fixed, low-latency path is essential for real-time capture applications where minimizing initial data access delay is critical.

Can SN74V263-15GGM be used in systems with asynchronous read and write clocks?

Yes, SN74V263-15GGM explicitly supports fully asynchronous operation: RCLK and WCLK may run at any frequency from 0 to 166 MHz, with no phase, frequency, or duty-cycle constraints between them. This makes SN74V263-15GGM ideal for bridging disparate clock domains in complex SoC or FPGA-based systems.

What is the purpose of the RM pin on SN74V263-15GGM?

The RM (Retransmit Latency Mode) pin configures SN74V263-15GGM's retransmit behavior during master reset: a low level selects zero-latency mode, where the first retransmitted word appears on Qn synchronized to the same RCLK edge that triggers RT; a high level selects normal-latency mode with one-cycle delay.