Texas Instruments TMS320C10FNL

Overview

TMS320C10FNL from Texas Instruments is a 16-bit fixed-point digital signal processor (DSP) with a 200-ns instruction cycle time, 144-word on-chip data RAM, 1.5K-word on-chip program ROM, 32-bit ALU/accumulator, and 16×16-bit hardware multiplier-designed for real-time signal processing in telecom and industrial control systems.

For engineers reviewing the TMS320C10FNL datasheet, TMS320C10FNL pinout, TMS320C10FNL application, or TMS320C10FNL equivalent, key selection criteria include its 5-V single-supply operation, microcomputer/microprocessor mode flexibility via MC/MP pin, 4K-word external memory expansion capability at full speed, and compatibility with legacy TMS32010 object code.

Technical Context

The TMS320C10FNL implements a modified Harvard architecture enabling simultaneous instruction fetch and data access while permitting program/data space transfers-critical for coefficient loading from ROM into RAM. Its 32-bit accumulator supports double-precision arithmetic, and the 0–16-bit barrel shifter enables efficient scaling during filtering operations.

It features a dedicated 16×16-bit two's-complement multiplier delivering 32-bit products in one cycle, essential for convolution and correlation. The device uses a four-level hardware stack for interrupt and subroutine handling and supports both maskable interrupts and polling via the BIO pin.

Key Specifications

Pinout & Package

Package: 40-pin plastic DIP (N package), lead pitch 0.1 inch, body width 0.6 inch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital signal processing applications.

Compared with TMS320C10FNL, the TMS320C10-25 delivers 25% higher instruction throughput within identical packaging and power constraints, while the TMS320C15 provides 78% more on-chip RAM for complex multi-stage algorithms-both maintain binary compatibility and require no PCB redesign.

Availability

TMS320C10FNL is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motor control, and test equipment requiring stable component supply and long-term obsolescence management.

Supply support for TMS320C10FNL 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 U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and digital signal processing technologies.

The TMS320C1x family was designed as cost-effective, single-chip alternatives to multichip bit-slice processors-targeting real-time signal processing in telecommunications, computer peripherals, and industrial automation.

FAQ

What is the instruction cycle time of the TMS320C10FNL?

The TMS320C10FNL has a 200-ns instruction cycle time, yielding a sustained throughput of 5 million instructions per second (MIPS). This timing is confirmed in the SPRS009C datasheet revision July 1991 and applies specifically to the TMS320C10 variant in 40-pin DIP packaging. The TMS320C10FNL executes all single-cycle instructions-including MPY, ADD, and LAC-in this fixed latency, enabling predictable real-time behavior in control loops.

Does the TMS320C10FNL support external program memory expansion?

Yes, the TMS320C10FNL supports up to 4K words of external program memory accessed at full speed-without wait states-when operating in microprocessor mode (MC/MP = 0). This capability is documented in the "program memory expansion" section of SPRS009C and distinguishes it from later C17-family devices that lack external memory support. External memory is addressed via the A11–A0 bus and controlled by MEN, DEN, and WE signals.

What package type is used for the TMS320C10FNL?

The TMS320C10FNL uses a 40-pin plastic dual in-line package (DIP), designated as the "N" package in TI documentation. This is explicitly listed in Table 1 of SPRS009C under "TMS320C10" with "DIP" and "40" entries, and confirmed in the mechanical drawing on page 10 showing the "N/JD Package" top view. It is not offered in PLCC or ceramic packages-those apply to other variants like TMS320C14.

Is the TMS320C10FNL pin-compatible with other TMS320C1x devices?

No, the TMS320C10FNL is not pin-compatible with most other TMS320C1x devices. Its 40-pin DIP layout differs from the 44-pin PLCC (e.g., TMS320C14) and 68-pin packages (e.g., TMS320C17). Even functionally similar parts like TMS320C15 use the same 40-pin DIP but differ in pin assignments-for example, TMS320C15 adds A12–A15 address lines not present on TMS320C10FNL. Pin compatibility is limited to same-package variants such as TMS320C10-14 and TMS320C10-25.

What is the role of the MC/MP pin on the TMS320C10FNL?

The MC/MP pin on the TMS320C10FNL selects between microcomputer mode (MC/MP = high) and microprocessor mode (MC/MP = low). In microcomputer mode, the on-chip 1.5K-word ROM is mapped into program memory space for self-contained execution. In microprocessor mode, all program memory is external, allowing flexible code updates via EPROM or RAM. This dual-mode capability is defined in the "microcomputer/microprocessor operating modes" section of SPRS009C and applies identically to the TMS320C10FNL.