Texas Instruments SN74V273-10PZA

Overview

SN74V273-10PZA from Texas Instruments is a 16384 × 18 / 32768 × 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 6-ns read/write cycle time at 166 MHz and supports zero-latency retransmit for real-time data replay in telecom and video buffering applications.

For engineers reviewing the SN74V273-10PZA datasheet, SN74V273-10PZA pinout, SN74V273-10PZA application, or SN74V273-10PZA equivalent, key selection criteria include its dual-width port configuration (×18/×9), programmable almost-empty/almost-full flags with eight default offsets, big/little-endian byte ordering, and 5-V-tolerant inputs enabling direct interfacing with legacy logic.

Technical Context

This FIFO implements high-speed asynchronous dual-clock architecture: WCLK and RCLK operate fully independently (0–166 MHz), with no frequency ratio constraints. Read and write pointers are managed by dedicated control logic, supporting simultaneous read/write without arbitration overhead.

It features configurable flag timing (synchronous/asynchronous PAE/PAF), master/partial reset hierarchy, and dual-mode retransmit (zero-latency or normal) controlled by RM during MRS. Bus-matching is determined at power-up via IW/OW pins, and endianness is set by BE-both latched during master reset and retained through partial reset.

Key Specifications

Pinout & Package

SN74V273-10PZA is housed in an 80-pin Thin Quad Flat Pack (TQFP) package with exposed thermal pad (PZA suffix). Pin functions are defined during master reset and remain stable across partial resets.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V273 and NB3N502, SN74V273-10PZA uniquely combines 5-V-tolerant I/O, FWFT timing, zero-latency retransmit, and ×9/×18 bus matching-making it irreplaceable in mixed-voltage, high-throughput, and protocol-translation applications requiring field-programmable flag thresholds.

Availability

SN74V273-10PZA is available at Aetrix Electronics and suitable for telecom infrastructure, video processing, DSP interfacing, and industrial protocol gateway designs requiring stable component supply and long-term obsolescence management.

Supply support for SN74V273-10PZA 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 leadership in high-speed interface ICs and DSP ecosystem components.

SN74V273-10PZA belongs to TI's high-speed FIFO memory product line, engineered specifically for jitter absorption, bus-matching, and real-time data replay in network, video, and digital signal processing systems.

FAQ

What is the maximum operating frequency of SN74V273-10PZA?

The SN74V273-10PZA supports up to 166 MHz on both WCLK and RCLK inputs, enabling 6-ns read/write cycle times. This frequency is guaranteed across commercial temperature range (0°C to 70°C) and 3.3-V ± 0.3-V supply, as verified in the SCAS669D datasheet revision February 2003. Operation above 166 MHz is not characterized or supported.

Does SN74V273-10PZA support 5-V logic inputs?

Yes, SN74V273-10PZA features 5-V-tolerant inputs on all control and data pins (D0–D17, WEN, REN, MRS, PRS, etc.), allowing direct interface with 5-V microcontrollers, FPGAs, or legacy logic without level shifters. The core operates at 3.3 V, but input structures are designed to withstand 5.5-V absolute maximum ratings.

How does the First-Word Fall-Through (FWFT) mode work in SN74V273-10PZA?

In FWFT mode-selected by asserting FWFT/SI high during master reset-the first word written to an empty SN74V273-10PZA appears on Q0–Q17 after exactly three rising edges of RCLK, regardless of REN state. Subsequent words require REN = low. This eliminates initial read latency in streaming applications like video frame buffering.

Can SN74V273-10PZA be used for depth expansion by cascading multiple devices?

Yes, SN74V273-10PZA supports depth expansion in FWFT mode: the Q outputs of one device connect directly to the D inputs of the next, with shared RCLK/WCLK and synchronized MRS. No external logic is needed because FWFT ensures continuous data flow across the chain, preserving throughput and eliminating handshaking overhead.

What is the difference between master reset (MRS) and partial reset (PRS) in SN74V273-10PZA?

Master reset (MRS) initializes all internal state-including read/write pointers, flag registers, bus width (IW/OW), timing mode (FWFT/SI), endianness (BE), and retransmit latency (RM)-and forces output register to zero. Partial reset (PRS) resets only pointers and outputs while retaining all configuration settings, enabling mid-operation recovery without reprogramming.