TMS320P15NL25 - 25.6 MHz 16-Bit Fixed-Point DSP | Texas Instruments
MPN: TMS320P15NL25 ✓ ActiveTMS320P15NL25 Overview
An LQ DSP, or fixed-point digital signal processor, is designed to execute multiply-accumulate operations efficiently on integer data rather than relying on floating-point arithmetic. The TMS320P15NL25 is positioned for audio, control, communications, and industrial signal-processing designs where predictable instruction throughput and a 16-bit word length are more useful than general-purpose CPU flexibility. Its processor implementation is associated with object-code compatibility across the TMS320C1x device family, according to the supplied distributor and technical-search data.
The listed operating frequency is 25.6 MHz, with a specified performance of 6.25 MIPS and a data-sheet description indicating performance up to 8.77 MIPS for the related TMS320P15 family. The processor provides fixed-point digital signal processing, with a 16-bit word length suitable for audio and control-loop implementations. The part is identified as a 40-pin PDIP device, making it appropriate for through-hole prototype and legacy-system boards rather than compact surface-mount designs.
Typical application areas include low-rate audio decoding, tone generation, speech-processing front ends, industrial motor and process control, communications modulation, and instrumentation. The 16-bit fixed-point datapath simplifies implementation where sampled data can be represented with integer scaling and where deterministic execution timing is valuable. The DIP package also facilitates socketed or through-hole assembly and provides generous spacing for inspection and manual rework.
For new designs, verify the clock, memory-interface, and pin-level requirements against the manufacturer datasheet before layout release. The older large-outline PDIP package is mechanically different from modern surface-mount DSP packages, so a footprint substitution is not automatically a drop-in replacement. This page combines verified distributor pricing, package information, technical context, sourcing links, and engineering guidance rather than repeating a single distributor listing.
Drop-in alternatives for TMS320P15NL25 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TMS320P15NL25 (same form factor and footprint) — differing in Clock Frequency, Mounting Type, Package, Architecture.
TMS320P15NL
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TMS320P15NA
✅ Drop-In ⚠️ Specs UnverifiedContact for price
View Datasheet →TMS320C10FNLR
✅ Drop-In ⚠️ Specs UnverifiedContact for price
View Datasheet →TMS320P15NL25 Specifications
| Device Type | Fixed-Point Digital Signal Processor (DSP) |
| Manufacturer | Texas Instruments |
| Clock Frequency | 25.6 MHz |
| Word Length | 16 bit |
| Performance | 6.25 MIPS |
| Family Performance Reference | Performance to 8.77 MIPs |
| Package | 40-pin PDIP |
| Package Type | Through-hole PDIP |
| Mounting Type | Through-hole |
| Processor Category | Digital Signal Processor |
| Arithmetic Type | Fixed-point |
| On-Chip Data RAM | 144/256-word on-chip data RAM family reference |
| Instruction Compatibility | All TMS320C1x devices are object code compatible |
| Datasheet File Size | 18269 KB |
| Datasheet Page Count | 146 pages |
| Datasheet Publication Date | 1997-10-03 |
TMS320P15NL25 through-hole pdip Pin Configuration Guide
Pin configuration for TMS320P15NL25 (through-hole pdip package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for TMS320P15NL25.
Refer to the datasheet for full pin configuration.
Typical Applications
TMS320P15NL25 is suitable for 6 applications: Fixed-Point Audio Signal Processing, Industrial Process Control, Communications and Modulation, Speech and Instrumentation Control, Legacy Audio and Control Board Refresh, Motor Drive and Embedded Signal Control.
Fixed-Point Audio Signal Processing
The TMS320P15NL25 suits audio applications that require deterministic 16-bit integer processing at a 25.6 MHz clock. Its fixed-point DSP architecture is appropriate for digital filters, mixing, equalization, and tone generation when sampled signals can be scaled into the processor's word length. The 6.25 MIPS listed performance provides a defined execution budget for repetitive sample-rate operations. The 40-pin PDIP package also makes the device convenient for through-hole prototypes, although a modern surface-mount DSP is usually preferable when board area is constrained.
Recommended
Industrial Process Control
The TMS320P15NL25 can implement digital control loops where predictable fixed-point execution is valuable, including PID-style calculations, filtering, and actuator-command generation. Its 16-bit arithmetic and 25.6 MHz clock support sampled control algorithms with a repeatable instruction budget. Designers should scale sensor and actuator values carefully to avoid overflow or excessive quantization. The through-hole PDIP package is useful for laboratory controller boards and legacy industrial test equipment, but its large footprint should be considered for compact control modules.
Recommended
Communications and Modulation
The TMS320P15NL25 is appropriate for communications front ends and modulation functions that benefit from multiply-accumute throughput and fixed-point arithmetic. The listed 25.6 MHz clock and 6.25 MIPS performance can support sampled filtering, symbol generation, and supervisory routines in a dedicated controller architecture. The family documentation states that TMS320C1x devices are object-code compatible, which may assist software migration within the family. Actual channel-rate capacity depends on the complete algorithm, memory configuration, and verified datasheet limits.
Recommended
Speech and Instrumentation Control
The TMS320P15NL25 can serve as the real-time processing engine in speech-processing prototypes and laboratory instruments where integer filtering, analysis, and user-interface coordination must share a single controller platform. Its 16-bit fixed-point format matches many sampled signal-processing chains and avoids floating-point overhead. Engineers should budget instruction cycles for acquisition, filtering, and host communication because the listed performance is a device-level figure rather than an application throughput guarantee. Its PDIP format is particularly convenient for breadboard-based instrument development.
Recommended
Legacy Audio and Control Board Refresh
The TMS320P15NL25 is useful when restoring or maintaining an older through-hole audio or control board that used the TMS320P15NL25 configuration. The 40-pin PDIP package and 25.6 MHz clock identify it as a leaded legacy-format device, making it more appropriate for socketed repair, prototype replication, or board redesign than for new high-density products. Verify pin functions and supply rails from the manufacturer data before fitting the part, because no complete pinout is included in the verified search data supplied for this page.
Recommended
Motor Drive and Embedded Signal Control
The TMS320P15NL25 can be evaluated for embedded motor-drive signal generation, current-loop sampling, and control filtering where fixed-point execution and deterministic timing are central requirements. The 16-bit datapath can represent scaled current, position, and duty-cycle values, while the 25.6 MHz clock supports tightly scheduled interrupt service. Safety-critical designs require additional checks for numerical headroom, watchdog behavior, and fault handling. The PDIP package favors serviceable low- and medium-volume laboratory controllers.
Recommended
Recommended Products Summary
Engineering reference data for TMS320P15NL25 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TMS320P15NL | TMS320P15 | TMS320C10FNLR |
|---|---|---|---|---|
| Package | 40-pin PDIP | 40-pin PDIP | 40-pin PDIP | 40-pin PDIP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Device Type | Fixed-Point DSP | Fixed-Point DSP | Fixed-Point DSP | Fixed-Point DSP |
Key Differentiators
- Specific 25.6 MHz configuration (vs TMS320P15NL)
- Explicitly verified 16-bit fixed-point DSP identity (vs TMS320C10FNLR)
- Identifiable 40-pin PDIP assembly format (vs TMS320P15)
Design Notes
Treat the 40-pin PDIP footprint as a mechanical commitment. The verified listings identify a 40-pin PDIP package, so a replacement must match lead pitch, body width, drill pattern, and every signal assignment rather than only sharing the generic package description. Keep analog, clock, and digital return paths separate where the application board mixes converter noise with DSP inputs.
Route the DSP clock as a short, continuous signal and keep the return path beneath the driver where possible. The supplied data confirms a 25.6 MHz clock but does not provide the complete pinout or board-layout example, so clock-source placement, decoupling values, and trace geometry must be checked against the manufacturer datasheet and application guidance before fabrication.
Do not substitute a similar-sounding TMS320P15 or TMS320C10 designation without checking the suffix and pin-level meaning. The verified data does not establish a drop-in cross-brand equivalent, and the three listed same-manufacturer alternatives require datasheet validation. In particular, verify clock limits, supply rails, memory organization, interrupt mapping, and no-connect pins before substituting any part.
Compliance Information
The supplied verified web data does not state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is marked not applicable because this is a legacy DSP rather than an identified automotive-qualified device.
