STMicroelectronics TS615IPWT

Overview

TS615IPWT from STMicroelectronics is a dual current-feedback operational amplifier designed for high-speed, high-output-current line driving in xDSL systems. It delivers 420 mA output source/sink current, 410 V/µs slew rate, 40 MHz −3 dB bandwidth at gain = 12 dB into 25 Ω, and 2.5 nV/√Hz input voltage noise - enabling robust differential signaling on twisted-pair telecom lines.

For engineers reviewing the TS615IPWT datasheet, TS615IPWT pinout, TS615IPWT application, or TS615IPWT equivalent, key selection criteria include its power-down function with matched-line impedance preservation, differential 21.2 V_p-p swing on 50 Ω, low harmonic distortion (−87 dBc HD2), and compatibility with ±2.5 V to ±6 V or +12 V supplies in TSSOP-14 exposed-pad packaging.

Technical Context

The TS615IPWT implements a current-feedback architecture optimized for wideband, high-output-drive applications. Its transimpedance gain structure enables stable operation at gains ≥ +2 with minimal phase shift, supporting flat frequency response up to 40 MHz under 25 Ω load conditions and maintaining ≤ 0.1 dB gain flatness over 7 MHz.

It integrates a dedicated PowerDown pin (Pin 6) that places outputs in high-impedance short-circuit state (15–23 Ω typical) to preserve line impedance matching during sleep mode, while drawing only 69–180 µA total supply current depending on rail voltage - critical for energy-sensitive xDSL CPE designs.

Key Specifications

Pinout & Package

The TS615IPWT is housed in a TSSOP-14 exposed-pad plastic package (JEDEC MO-153AC) with thermal pad connected to −V_CC1 for optimal heat dissipation (R_thJC = 4 °C/W). The exposed die pad must be soldered to a PCB copper area tied to −V_CC1 to ensure safe operation at full output power.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-output-current, wideband line driver applications.

Compared with THS3091D and LMH6723MA, the TS615IPWT uniquely combines dual-channel operation, ±420 mA drive into 25 Ω, integrated power-down with matched termination, and 40 MHz bandwidth - making it the only direct fit for xDSL line driver reference designs requiring both performance and power-state integrity.

Availability

TS615IPWT is available at Aetrix Electronics and suitable for xDSL line driver modules, video distribution systems, high-speed data acquisition front-ends, and active telecom filtering circuits requiring stable component supply and long-term industrial availability.

Supply support for TS615IPWT 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in analog, power, microcontroller, and automotive ICs with vertical manufacturing and broad industrial qualification.

The TS615 belongs to ST's high-speed precision amplifier product line, engineered specifically for broadband communications infrastructure - emphasizing low distortion, high output drive, and power-state-aware interface integrity in DSL, CATV, and test equipment.

FAQ

What is the maximum safe continuous output current for TS615IPWT into a 25 Ω load?

The TS615IPWT delivers ±420 mA output current into 25 Ω loads at ±6 V supply, verified across temperature (−40°C to +85°C) with thermal derating applied above 25°C ambient. Absolute maximum ratings specify 530 mA sink and 470 mA source under transient conditions, but sustained operation above ±420 mA risks exceeding P_max = 3.1 W and triggering thermal shutdown unless PCB copper area and airflow meet R_thJA ≤ 40 °C/W.

Can TS615IPWT operate from a single +12 V supply instead of dual ±6 V rails?

Yes - the TS615IPWT supports single +12 V operation with ground referenced at −V_CC1/−V_CC2. In this configuration, outputs swing symmetrically around 6 V, delivering 21.2 V_p-p differential across 50 Ω. Input common-mode range shifts to 1.5 V to 10.5 V, requiring level-shifting for AC-coupled sources; gain-setting resistors must be recalculated for proper bias point.

How does the PowerDown function affect signal integrity on the transmission line?

During PowerDown (Pin 6 low), TS615IPWT actively shorts both outputs to −V_CC through a 15–23 Ω on-resistance, matching standard 25–50 Ω line impedances. This prevents open-circuit reflections and maintains return loss > 20 dB across 0–30 MHz, ensuring seamless transition between active and sleep modes without disrupting upstream DSLAM synchronization or causing echo path anomalies.

Is the exposed thermal pad on TS615IPWT electrically connected to any internal node?

Yes - the exposed pad is internally bonded to −V_CC1 and must be soldered to a PCB copper pour tied to the −V_CC1 net. This connection provides the primary thermal conduction path (R_thJC = 4 °C/W) and ensures electrical stability; floating or grounding the pad to system GND violates absolute maximum ratings and may cause latch-up or parametric shift.