Texas Instruments SN74V215-10PAG

Overview

SN74V215-10PAG from Texas Instruments is a 512 × 18-bit synchronous FIFO memory IC with 7.5-ns read/write cycle time, 3.3-V V_CC supply, and 5-V input-tolerant I/O. It supports both first-word fall-through (FWFT) and standard timing modes, features programmable almost-empty/almost-full flags, and is optimized for DSP-to-processor and DSP-to-analog front-end buffering in high-speed digital signal processing systems.

For engineers reviewing the SN74V215-10PAG datasheet, SN74V215-10PAG pinout, SN74V215-10PAG application, or SN74V215-10PAG equivalent, key selection considerations include its 512-word depth, 18-bit bus width, dual-clock asynchronous/synchronous operation, FWFT mode latency behavior, and 64-pin TQFP package compatibility with TI TMS320 DSP glueless interfacing requirements.

Technical Context

This synchronous FIFO employs independent read and write clocks (RCLK/WCLK), each gated by enable signals (REN/WEN), enabling flexible interface timing between mismatched clock domains. Its internal RAM array is paired with dedicated read/write pointers, offset registers, and flag logic supporting both FWFT and standard modes selected at reset via FL/RXI/WXI pin states.

The device implements dual-purpose pins including WXO/HF (half-full flag or write expansion output), RXO (read expansion output), and FF/IR or EF/OR status outputs that dynamically reconfigure function based on timing mode. Programmable flag offsets are loaded via LD-controlled register access using D0–D11, with default empty/full offsets of 63 words for SN74V215-10PAG.

Key Specifications

Pinout & Package

Packaged in a 64-pin thin quad flat package (TQFP), SN74V215-10PAG uses a standard surface-mount footprint with 0.5-mm lead pitch and exposed thermal pad. Pin functions are validated per TI SCAS636E datasheet revision September 2002.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V215L10PFI and NB3N502M, SN74V215-10PAG uniquely combines 5-V input tolerance, FWFT latency optimization, and user-programmable flag offsets-making it the only option among the three qualified for glueless TMS320 DSP interfacing with adaptive buffer management.

Availability

SN74V215-10PAG is available at Aetrix Electronics and suitable for DSP subsystem design, real-time signal processing hardware, and industrial embedded communications requiring stable component supply across extended production lifecycles.

Supply support for SN74V215-10PAG 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 processing technologies, with decades of heritage in high-performance data-path components.

SN74V215-10PAG belongs to the DSP-SYNC™ family of synchronous FIFOs, engineered specifically to eliminate glue logic between TMS320 DSPs and peripherals while delivering deterministic latency and scalable buffering for real-time signal chains.

FAQ

What is the memory organization and maximum operating frequency of SN74V215-10PAG?

SN74V215-10PAG provides a fixed 512 × 18-bit synchronous FIFO memory array. Its 7.5-ns read/write cycle time supports guaranteed operation up to 133 MHz, with timing validated across 0°C to +70°C ambient temperature. This performance enables sustained high-throughput data transfer in DSP interface applications without violating setup/hold margins.

How does first-word fall-through (FWFT) mode differ from standard mode in SN74V215-10PAG?

In FWFT mode, the first word written to an empty SN74V215-10PAG appears on Q0–Q17 after three valid RCLK transitions-no REN assertion required. In standard mode, the first word remains internal until REN is asserted with RCLK. This distinction reduces initial read latency by up to one clock cycle, critical for real-time DSP response.

Does SN74V215-10PAG support mixed-voltage interfacing?

Yes. SN74V215-10PAG operates from a 3.3-V V_CC supply but features 5-V tolerant inputs on all control and data pins (D0–D17, WEN, REN, etc.). This eliminates need for external level shifters when connecting to legacy 5-V logic, simplifying board design in hybrid-signal systems.

What are the default programmable flag offsets for SN74V215-10PAG?

At power-on reset, SN74V215-10PAG loads default offsets of 63 words for both programmable almost-empty (PAE) and almost-full (PAF) flags. These values are stored in internal 12-bit offset registers and can be reprogrammed via LD-controlled writes to D0–D11 during normal operation.

Can multiple SN74V215-10PAG devices be cascaded for greater depth?

Yes. SN74V215-10PAG supports daisy-chain depth expansion using WXI/WXO and RXI/RXO pins. In this configuration, FL is grounded on the first device and pulled high on subsequent units. The chain maintains synchronized flag propagation and preserves FWFT behavior across the expanded buffer.