Texas Instruments SN74V263-10PZA

Overview

SN74V263-10PZA 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, video frame alignment, and telecom packet handling.

For engineers reviewing the SN74V263-10PZA datasheet, SN74V263-10PZA pinout, SN74V263-10PZA application, or SN74V263-10PZA equivalent, key selection criteria include FWFT vs. standard timing mode configuration, programmable almost-empty/full flag offsets, independent RCLK/WCLK domains, big/little-endian byte ordering, and 5-V-tolerant inputs for mixed-voltage system integration.

Technical Context

This FIFO implements dual-clock asynchronous architecture with fully independent read and write clock domains (RCLK/WCLK), supporting zero-latency retransmit via RT/RM control and fixed first-word latency optimized for deterministic data flow. Bus-matching logic enables runtime ×9/×18 port width selection through IW/OW pins during master reset.

Flag generation uses configurable synchronous/asynchronous timing (PFM pin), eight default offset presets (FSEL0/FSEL1/LD), and dual programming methods (serial via SEN/FWFT-SI or parallel via WEN/Dn). Big-endian/little-endian format (BE pin) and interspersed parity (IP pin) are set at initialization and retained across partial resets.

Key Specifications

Pinout & Package

SN74V263-10PZA is housed in an 80-pin Thin Quad Flat Pack (TQFP) package with exposed thermal pad (PZA suffix), compliant with JEDEC MO-153AC. Pin functions are validated per TI SCAS669D datasheet Rev. February 2003.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V263L10PFI and NB3N502DG, SN74V263-10PZA uniquely combines 5-V-tolerant inputs, FWFT timing, zero-latency retransmit, and full bus-width configurability - making it optimal for high-performance, mixed-voltage, multi-protocol embedded systems requiring deterministic latency and flexible data path adaptation.

Availability

SN74V263-10PZA is available at Aetrix Electronics and suitable for video frame buffering, DSP external memory interfacing, and telecom packet assembly requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for SN74V263-10PZA 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 DSP ecosystem components.

SN74V263-10PZA belongs to TI's high-speed FIFO memory product line, engineered specifically for deterministic, low-latency data buffering in clock-domain-crossing applications involving DSPs, video processors, and telecommunications infrastructure.

FAQ

What memory configurations does SN74V263-10PZA support?

SN74V263-10PZA supports two memory organizations: 8192 × 18 (147,456 bits) and 16384 × 9 (147,456 bits), selected at master reset via IW and OW pin states. Both configurations provide identical total bit capacity but differ in data bus width and addressing depth - enabling optimization for either wide-data throughput or deep-buffer latency requirements in the target system design.

How does SN74V263-10PZA handle clock domain crossing between write and read operations?

SN74V263-10PZA uses fully asynchronous dual-clock architecture: WCLK and RCLK operate independently at frequencies from 0 to 166 MHz with no phase or frequency constraints. Internal pointer logic and flag generation are synchronized to their respective clocks, eliminating metastability risk and enabling reliable data transfer across unrelated clock domains - a core requirement for SN74V263-10PZA in video, DSP, and networking applications.

What is the function of the FWFT/SI pin on SN74V263-10PZA?

The FWFT/SI pin serves two distinct roles: during master reset, its logic level selects First-Word Fall-Through (high) or standard timing mode (low); after reset, it functions as serial input (SI) for loading programmable flag offsets when serial programming is enabled. This dual functionality minimizes pin count while preserving full configuration flexibility - a defining feature of SN74V263-10PZA's architecture.

Can SN74V263-10PZA be used in systems with both 3.3-V and 5-V logic?

Yes - SN74V263-10PZA features 5-V-tolerant inputs (WCLK, RCLK, WEN, REN, MRS, etc.), allowing direct connection to 5-V signal sources without external level shifters. The device itself operates from a 3.3-V supply and drives 3.3-V outputs; this mixed-voltage compatibility simplifies integration in legacy upgrades and heterogeneous digital systems where SN74V263-10PZA bridges voltage domains.

How does partial reset (PRS) differ from master reset (MRS) on SN74V263-10PZA?

Master reset (MRS) initializes all internal state: read/write pointers, flags, output register, and configuration bits (FWFT, IW, OW, BE, RM, PFM, IP). Partial reset (PRS) only resets pointers and flags while preserving all configuration settings - including bus width, timing mode, flag offsets, and endianness. This allows SN74V263-10PZA to clear buffer contents mid-operation without reprogramming hardware setup, critical for real-time protocol gateways and streaming pipelines.