Texas Instruments TP13057AN

Overview

TP13057AN from Texas Instruments is an A-law compatible monolithic PCM codec and filter IC designed for full-duplex voice telephony interface in TDM systems. It integrates transmit A/D conversion, receive D/A conversion, transmit high-pass/low-pass filtering, receive low-pass filtering with (sin x)/x correction, active RC noise filters, and internal precision voltage reference. It operates at ±5 V, consumes 50 mW typical active power, supports –40°C to 85°C industrial temperature range, and targets line interface cards in T1/PABX/central office systems.

For engineers reviewing the TP13057AN datasheet, TP13057AN pinout, TP13057AN application, or TP13057AN equivalent, key selection considerations include A-law encoding compliance, –40°C to 85°C extended temperature rating, psophometric-weighted receive noise of –86 dBm0p, 16-pin N-package pinout, and compatibility with 1.536/1.544/2.048 MHz master clocks and 64 kHz–2.048 MHz bit clocks.

Technical Context

The TP13057AN implements a complete analog-to-digital and digital-to-analog signal path for voice-band PCM systems, with dedicated transmit and receive filtering blocks including switched-capacitor band-pass and low-pass filters plus RC active noise suppression. Its timing architecture supports both synchronous and asynchronous operation modes using separate or shared master clocks (MCLKX/MCLKR) and frame-sync pulses (FSX/FSR) aligned to 8-kHz TDM frames.

It features TTL/CMOS-compatible digital I/O, automatic power-down via MCLKR/PDN pin, internal autozero circuitry for offset stability, and dual-supply ±5 V operation with independent analog ground (ANLG GND). The device uses A-law companding per CCITT G.711 and achieves <±0.15 dB absolute transmit/receive filter gain flatness across 300–3000 Hz.

Key Specifications

Pinout & Package

TP13057AN is supplied in a 16-pin plastic DIP (N) package with through-hole mounting and standard 0.3-inch body width.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PCM codec and filter applications.

Compared with TP3057A and TP13054AN, the TP13057AN uniquely combines A-law compliance with –40°C to 85°C operation-enabling drop-in deployment in global carrier infrastructure where both regional coding standards and environmental ruggedness are mandatory.

Availability

TP13057AN is available at Aetrix Electronics and suitable for T1 carrier line interface cards, PABX subscriber concentrators, and digital encryption system interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TP13057AN 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 decades of telecom IC heritage.

The TP13057AN belongs to TI's legacy telephony codec family, engineered specifically for carrier-grade voice digitization in TDM-based switching and transmission systems requiring A-law compliance and industrial reliability.

FAQ

What is the operating temperature range of the TP13057AN?

The TP13057AN is specified for operation from –40°C to 85°C, making it suitable for industrial and outdoor telecom applications where ambient conditions exceed commercial-grade limits. This extended range distinguishes it from the TP3057A (0°C to 70°C) and enables deployment in remote DSLAMs, base station line cards, and uncontrolled cabinet environments without thermal derating.

Does the TP13057AN support both synchronous and asynchronous clocking modes?

Yes, the TP13057AN supports both modes. In synchronous mode, MCLKX serves as the master clock for transmit and receive paths while MCLKR/PDN acts as a power-down control. In asynchronous mode, independent MCLKX and MCLKR clocks (1.536/1.544 MHz for µ-law variants, 2.048 MHz for A-law) may be used-though best performance is achieved when they are synchronized. The BCLKR/CLKSEL pin configures master clock selection in sync mode.

What is the significance of the –86 dBm0p receive noise specification for TP13057AN?

The –86 dBm0p psophometric-weighted receive noise is a critical voice quality metric meeting ITU-T P.51 and P.53 standards for carrier-class telephony. It reflects the device's ability to suppress quantization and circuit noise in the 300–3400 Hz band, ensuring high intelligibility in PABX, central office, and encryption system applications where low-noise analog reconstruction is essential.

How does the TP13057AN handle power-down sequencing?

The TP13057AN enters power-down when MCLKR/PDN is held high. To avoid latch-up, TI specifies a strict power-up sequence: ground first, then VBB (–5 V), then VCC (+5 V), then assert power-down, then apply clocks, then release power-down, then apply frame sync, then apply analog signals. Reversing this order during power-down is equally critical to prevent CMOS latch-up events.

Is the TP13057AN pin-compatible with earlier National Semiconductor codecs?

Yes, the TP13057AN is pin-for-pin compatible with the National Semiconductor TP3057A, allowing direct replacement in existing designs. It retains identical 16-pin N-package layout, terminal functions, and electrical timing-while adding improved noise performance, extended temperature range, and enhanced ESD protection consistent with TI's manufacturing process upgrades.