Texas Instruments SN74V283-7GGM

Overview

SN74V283-7GGM 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. It delivers 166-MHz operation, 6-ns read/write cycle time, and zero-latency retransmit for high-throughput buffering in DSP interfacing and telecom data pipelines.

For engineers reviewing the SN74V283-7GGM datasheet, SN74V283-7GGM pinout, SN74V283-7GGM application, or SN74V283-7GGM equivalent, key selection criteria include its dual-depth memory organization, programmable almost-empty/almost-full flags with eight default offsets, big/little-endian byte formatting, and 5-V-tolerant inputs for mixed-voltage system integration.

Technical Context

The SN74V283-7GGM implements a synchronous dual-clock FIFO architecture with fully independent RCLK and WCLK domains-each supporting 0–166 MHz operation without inter-clock frequency constraints. Its RAM array supports two configurable depths: 32768 words × 18 bits or 65536 words × 9 bits, selected at master reset via IW/OW pins.

Flag logic includes EF/OR, FF/IR, HF, PAE, and PAF outputs, with PAE/PAF programmable via serial or parallel loading and configurable for synchronous/asynchronous assertion timing using the PFM pin. Retransmit functionality resets the read pointer on RT assertion, with zero-latency mode selectable via RM during master reset.

Key Specifications

Pinout & Package

SN74V283-7GGM is packaged in a 100-pin Ball Grid Array (BGA), GGM package, with 1.0-mm ball pitch and 12 mm × 12 mm body size. Pin functions are defined during master reset and support full configuration of timing mode, endianness, flag defaults, and retransmit behavior.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74V273-7GGM and SN74V293-7GGM, the SN74V283-7GGM provides optimal balance of depth, speed, and footprint for mid-range telecom and video applications-delivering 32k×18 capacity without over-provisioning or under-specifying buffer headroom.

Availability

SN74V283-7GGM is available at Aetrix Electronics and suitable for network packet buffering, DSP data acquisition, video frame synchronization, and telecom line card buffering requiring stable component supply and long-term production continuity.

Supply support for SN74V283-7GGM 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 digital signal technologies, with decades of leadership in high-speed interface and memory solutions.

The SN74V283-7GGM belongs to TI's high-speed FIFO memory family designed specifically for glueless interfacing with C6x DSPs and demanding real-time data buffering in telecom, video, and networking infrastructure.

FAQ

What memory depth configurations does the SN74V283-7GGM support?

The SN74V283-7GGM supports two memory organizations selected at master reset: 32768 words × 18 bits or 65536 words × 9 bits. This dual-depth capability enables flexible bus-matching-for example, writing 18-bit wide data from a DSP and reading 9-bit chunks for downstream processing. The configuration is controlled by the IW (input width) and OW (output width) pins during MRS assertion, and both modes retain full 166-MHz performance and identical flag behavior.

How does the zero-latency retransmit function work in the SN74V283-7GGM?

In the SN74V283-7GGM, zero-latency retransmit is enabled by setting RM low during master reset. When RT is asserted low on a rising RCLK edge, the read pointer resets to address zero and the first retransmitted word appears on Q outputs *on that same RCLK edge*. This eliminates pipeline stalls during protocol retries or debug trace replay. Unlike normal-latency mode-which requires an additional RCLK cycle-the zero-latency path is hardware-accelerated and fully deterministic, making it ideal for time-critical recovery sequences in telecom and avionics systems.

Can the SN74V283-7GGM interface directly with 5-V logic components?

Yes, the SN74V283-7GGM features 5-V-tolerant inputs-including WCLK, RCLK, WEN, REN, MRS, and all control pins-allowing direct connection to legacy 5-V microcontrollers, FPGAs, or peripheral ICs without external level shifters. This tolerance applies regardless of VCC = 3.3 V operation. However, outputs (Q0–Q17) are not 5-V tolerant and must interface only with 3.3-V–compatible receivers. OE control maintains high-impedance state during voltage domain transitions to prevent contention.

What is the difference between master reset (MRS) and partial reset (PRS) in the SN74V283-7GGM?

Master reset (MRS) in the SN74V283-7GGM fully reinitializes the device: resetting read/write pointers to zero, clearing all flags (EF/OR, FF/IR, HF, PAE, PAF), setting output register to zero, and reloading all configuration settings (FWFT mode, bus width, endianness, retransmit latency, flag timing) from pin states. Partial reset (PRS) only resets pointers and output register while preserving all configuration registers and programmed flag offsets-enabling safe mid-operation buffer clearing without losing custom timing or sizing setup. Both are asynchronous active-low signals.

How are the programmable almost-empty (PAE) and almost-full (PAF) flags configured in the SN74V283-7GGM?

The SN74V283-7GGM supports PAE and PAF configuration via serial or parallel programming of offset registers. During master reset, FSEL0/FSEL1/LD select one of eight factory-default offsets (e.g., PAE = 8 words, PAF = 64 free locations). After reset, offsets can be updated: serially using SEN + FWFT/SI + WCLK, or in parallel using WEN + D0–D8 + WCLK. PFM pin selects synchronous (edge-triggered) or asynchronous (level-sensitive) flag assertion timing. All settings persist through PRS and power-cycle if retained in nonvolatile context (external controller-managed).