Texas Instruments SN74V283-7PZA

Overview

SN74V283-7PZA from Texas Instruments is a 3.3-V CMOS, 32768 × 18 / 65536 × 9 first-in, first-out (FIFO) memory with independent read/write clocks, user-selectable ×9/×18 bus sizing, and FWFT/standard timing modes - deployed in high-throughput network buffering and DSP interfacing applications.

For engineers reviewing the SN74V283-7PZA datasheet, SN74V283-7PZA pinout, SN74V283-7PZA application, or SN74V283-7PZA equivalent, key selection criteria include its 166-MHz operation, 6-ns read/write cycle time, zero-latency retransmit capability, programmable almost-empty/almost-full flags, and 80-pin TQFP (PZA) package compatibility with TI 'C6x DSP glueless interfaces.

Technical Context

This FIFO implements dual-clock asynchronous architecture with fully independent RCLK and WCLK domains (0–166 MHz), enabling simultaneous read/write without arbitration. Its RAM array supports two configurable depths: 32768 × 18 (full-width) or 65536 × 9 (half-width), selected at master reset via IW/OW pins.

Flag logic includes EF/OR, FF/IR, HF, PAE, and PAF - with PAE/PAF programmable via serial or parallel loading and configurable for synchronous/asynchronous assertion timing via PFM. Retransmit is initiated by RT on RCLK edge and supports zero-latency mode when RM is low during MRS.

Key Specifications

Pinout & Package

SN74V283-7PZA is housed in an 80-pin Thin Quad Flat Pack (TQFP) package designated PZA, with 0.5-mm pitch and exposed thermal pad. Pin functions are validated per TI SCAS669D datasheet Figure 1 and Terminal Functions table (pages 7–8).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74V273-7PZA and SN74V293-7PZA, SN74V283-7PZA delivers optimal balance of depth, speed, and pin compatibility for mid-range telecom and video systems - avoiding overdesign cost while ensuring sufficient margin for burst traffic handling.

Availability

SN74V283-7PZA is available at Aetrix Electronics and suitable for telecom infrastructure, video processing, DSP interfacing, and industrial protocol bridging requiring stable component supply across extended production lifecycles.

Supply support for SN74V283-7PZA 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.

The SN74V2xx family was designed specifically for high-throughput, low-latency data buffering in TI DSP-based systems - emphasizing glueless EMIF/XBus compatibility, flexible bus sizing, and deterministic retransmit behavior.

FAQ

What memory organization does SN74V283-7PZA support?

SN74V283-7PZA supports two memory organizations selected at master reset: 32768 × 18 (full 18-bit width) or 65536 × 9 (half-width). The choice depends on IW and OW pin states during MRS and determines effective depth and bus-matching capability - critical for matching unequal system data paths without external logic.

Does SN74V283-7PZA support 5-V logic inputs?

Yes, SN74V283-7PZA features 5-V-tolerant inputs across all control and data pins (WEN, REN, WCLK, RCLK, D0–D17, etc.), allowing direct connection to 5-V microcontrollers or FPGAs while operating from a 3.3-V supply - eliminating level-shifter components in mixed-voltage systems.

How is FWFT mode configured on SN74V283-7PZA?

FWFT mode is selected by holding FWFT/SI high during master reset (MRS low). In this mode, the first word written to an empty FIFO appears on Q0–Q17 after three RCLK rising edges without requiring REN assertion - reducing initial latency in streaming applications. Subsequent reads still require REN.

Can SN74V283-7PZA be used for zero-latency retransmit?

Yes, SN74V283-7PZA supports zero-latency retransmit when RM is held low during master reset. In this configuration, asserting RT low on a rising RCLK edge causes the first retransmitted word to appear on Q outputs synchronized to that same RCLK edge - essential for real-time replay in test equipment and loopback diagnostics.

What package type is SN74V283-7PZA supplied in?

SN74V283-7PZA is supplied in an 80-pin Thin Quad Flat Pack (TQFP) package with designation PZA, featuring 0.5-mm lead pitch and RoHS-compliant finish. This package is mechanically and thermally optimized for high-density PCB layouts and supports standard reflow soldering profiles.