Texas Instruments SN74V273PZAEP

Overview

SN74V273PZAEP from Texas Instruments is a radiation-tolerant, high-speed 3.3-V CMOS FIFO memory with 16384 × 18 or 32768 × 9 configurable depth/width, 133-MHz operation, 7.5-ns read/write cycle time, and independent synchronous read/write clocks - deployed in aerospace telemetry buffering and DSP interface applications.

For engineers reviewing the SN74V273PZAEP datasheet, SN74V273PZAEP pinout, SN74V273PZAEP application, or SN74V273PZAEP equivalent, key selection criteria include bus-matching flexibility (×9/×18 in/out), FWFT vs. standard timing mode, programmable almost-empty/full flag offsets, zero-latency retransmit capability, and extended temperature support (–55°C to 125°C).

Technical Context

This FIFO implements dual-clock architecture with fully asynchronous RCLK/WCLK domains, enabling simultaneous read/write at up to 133 MHz without clock domain crossing logic. It supports user-selectable input/output bus sizing (×9 or ×18) via IW/OW pins during master reset, and big-endian/little-endian word ordering via BE pin.

Flag logic includes EF/OR, FF/IR, HF, PAE, and PAF outputs with programmable thresholds; PAE/PAF timing can be configured as synchronous (edge-triggered on RCLK/WCLK) or asynchronous (level-sensitive) via PFM pin. Retransmit function resets read pointer on RT assertion, with zero-latency mode selectable via RM pin during MRS.

Key Specifications

Pinout & Package

SN74V273PZAEP is housed in an 80-pin Thin Quad Flat Pack (TQFP) package with 0.5-mm pitch, thermally enhanced for sustained high-speed operation in conduction-cooled avionics enclosures.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74V273PZAEP, SN74V263PZAEP offers identical functionality at half the memory depth - ideal for cost-sensitive, bandwidth-constrained designs - while SN74V283PZAEP extends depth by 2× without changing interface timing or thermal profile, supporting higher-resolution signal processing workloads.

Availability

SN74V273PZAEP is available at Aetrix Electronics and suitable for aerospace telemetry systems, DSP interface modules, satellite command replay units, and avionics sensor aggregation nodes requiring stable component supply across extended temperature and radiation-hardened environments.

Supply support for SN74V273PZAEP 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 high-reliability components, with decades of heritage in space-qualified logic and memory solutions.

The SN74V2xx-EP family was engineered specifically for radiation-tolerant, extended-temperature FIFO applications in defense, aerospace, and industrial control - emphasizing deterministic timing, bus-matching flexibility, and long-term supply assurance.

FAQ

What is the maximum operating frequency of the SN74V273PZAEP?

The SN74V273PZAEP supports up to 133 MHz for both read and write operations, with guaranteed 7.5-ns read/write cycle time under full industrial temperature range (–55°C to 125°C). This performance is validated across process corners and voltage extremes per SCAS695A datasheet specifications.

Does the SN74V273PZAEP support ×9 to ×18 bus expansion?

Yes, the SN74V273PZAEP supports bidirectional bus-matching configurations including ×9 in to ×18 out, enabled by setting IW = high and OW = low during master reset. This allows direct connection to 9-bit peripherals and 18-bit processors without external logic.

How does the zero-latency retransmit function work in SN74V273PZAEP?

In SN74V273PZAEP, zero-latency retransmit places the first retransmitted word on Q outputs on the same RCLK edge that samples RT low, provided RM is held low during master reset. This eliminates read-pointer reset delay, enabling immediate frame replay in telemetry recovery sequences.

Can SN74V273PZAEP operate with different read and write clock frequencies?

Yes, SN74V273PZAEP fully supports independent RCLK and WCLK domains with no frequency or phase constraints. Clocks may run at 0 Hz to 133 MHz each, enabling asynchronous buffering between disparate subsystems such as Ethernet MAC and DSP core.

What packaging and thermal characteristics apply to SN74V273PZAEP?

SN74V273PZAEP uses an 80-pin TQFP (PZA) package with 0.5-mm pitch and exposed thermal pad. It is rated for –55°C to 125°C operation and qualified per JEDEC JESD22-A108 for HAST, temperature cycling, and electromigration - meeting MIL-PRF-38535 Class V reliability requirements.