Texas Instruments TMS320C542PGE2-40

Overview

TMS320C542PGE2-40 from Texas Instruments is a 5-V, fixed-point digital signal processor (DSP) with 10K × 16-bit on-chip dual-access RAM, 2K × 16-bit on-chip ROM, and 25-ns single-cycle instruction execution (40 MIPS). It integrates a TDM serial port, buffered serial port (BSP), 8-bit HPI, one 16-bit timer, and on-chip PLL clock generator - deployed in real-time voice coding, telephony channel banks, and embedded audio preprocessing systems.

For engineers reviewing the TMS320C542PGE2-40 datasheet, TMS320C542PGE2-40 pinout, TMS320C542PGE2-40 application, or TMS320C542PGE2-40 equivalent, key selection criteria include its 144-pin TQFP package, 5-V core/I/O supply, 25-ns cycle time, dual serial port architecture (TDM + BSP), and HPI interface for host co-processing - all critical for legacy telecom DSP board upgrades and industrial voice analytics platforms.

Technical Context

The TMS320C542PGE2-40 implements an advanced modified Harvard architecture with three independent 16-bit data memory buses and one program memory bus, enabling simultaneous instruction fetch and dual-data read/write operations per cycle. Its 40-bit ALU includes a barrel shifter and two accumulators, supporting non-pipelined MAC in one cycle via a 17×17-bit multiplier and dedicated 40-bit adder.

On-chip peripherals include software-programmable wait-state generation, PLL-based clock synthesis (with internal oscillator or external CLKIN), full-duplex TDM/BSP serial ports, 8-bit HPI, and IEEE 1149.1 JTAG boundary scan. Power management features IDLE1–IDLE3 instructions and CLKOUT disable control for low-power operation in burst-mode voice processing.

Key Specifications

Pinout & Package

Package: 144-pin Thin Quad Flatpack (TQFP), PGE suffix, 20 mm × 20 mm body, 0.5 mm pitch, exposed thermal pad (non-electrical).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-point DSP applications.

Compared with TMS320C542PGE2-40, the LC542 offers lower power at same speed but mandates voltage translation, while the C549 provides scalable memory and optional higher speed - making the TMS320C542PGE2-40 optimal for cost-constrained, drop-in replacements in fielded 5-V telecom hardware.

Availability

TMS320C542PGE2-40 is available at Aetrix Electronics and suitable for voice channel banks, industrial voice analytics systems, and legacy telephony gateways requiring stable component supply and long-term obsolescence mitigation.

Supply support for TMS320C542PGE2-40 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 connectivity technologies, with over 50 years of DSP innovation history.

The TMS320C54x family was engineered for cost-sensitive, real-time signal processing in telecommunications infrastructure - emphasizing deterministic timing, on-chip memory efficiency, and robust peripheral integration for voice and audio applications.

FAQ

What is the maximum external memory address space supported by the TMS320C542PGE2-40?

The TMS320C542PGE2-40 supports up to 192K × 16-bit total addressable memory space: 64K words program, 64K words data, and 64K words I/O space. It does not support the extended 8M-word program space - that capability is exclusive to '548/'549 variants per the SPRS039C datasheet.

Does the TMS320C542PGE2-40 include an on-chip phase-locked loop (PLL)?

Yes, the TMS320C542PGE2-40 includes an on-chip PLL clock generator with internal oscillator support. CLKMD1–CLKMD3 pins configure multiplication factors (e.g., ×1, ×2, ×4), and X2/CLKIN + X1 pins accept crystal or external clock input - enabling flexible clock synthesis from 10 MHz to 40 MHz system clocks.

Can the TMS320C542PGE2-40 operate with a 3.3-V supply?

No, the TMS320C542PGE2-40 is a 5-V-only device. Its absolute maximum ratings, DC characteristics, and recommended operating conditions specify 4.75 V to 5.25 V for both CVDD (core) and DVDD (I/O). For 3.3-V operation, the TMS320LC542PGE-25 is the functionally equivalent low-voltage variant.

What serial port types are integrated into the TMS320C542PGE2-40?

The TMS320C542PGE2-40 integrates two distinct serial interfaces: one time-division multiplexed (TDM) serial port and one buffered serial port (BSP), as confirmed in Table 1 of SPRS039C. It does not include standard (general-purpose) serial ports - those are present only on 'C541/'LC541 devices.

Is the TMS320C542PGE2-40 pin-compatible with other TMS320C54x family members?

The TMS320C542PGE2-40 shares the 144-pin PGE TQFP package footprint with TMS320LC542PGE and TMS320LC548PGE, but pin functions differ across variants - especially for serial port signals (e.g., TDM vs. BSP naming conventions) and power pins (CVDD/DVDD voltage requirements). Direct PCB replacement requires verification of signal mapping and voltage compliance.