STMicroelectronics STPIC6A259MTR

Overview

STPIC6A259MTR from STMicroelectronics is an 8-bit addressable latch with open-drain DMOS power outputs, functioning as either eight independent latches or an 8-line demultiplexer. It delivers 350mA per channel, 50V switching capability, 1Ω typical R_DS(on), short-circuit protection, and avalanche energy rating of 75mJ. Used in industrial I/O expansion and relay driver modules where robust load switching and fault resilience are required.

For engineers reviewing the STPIC6A259MTR datasheet, STPIC6A259MTR pinout, STPIC6A259MTR application, or STPIC6A259MTR equivalent, this page provides verified functional modes, thermal derating data, current-limiting behavior, and SO-24 package layout for direct integration into high-reliability digital power interface designs.

Technical Context

The device implements four distinct operational modes-addressable latch, demultiplexer, memory hold, and clear-selected via synchronous control of CLR and G inputs. Address decoding uses three binary inputs (S0–S2) to select one of eight DMOS outputs, each with independent current-limiting circuitry that activates at 600–1100mA.

It features separate logic ground (LGND) and power ground (PGND) terminals, with internal PGND bonding and mandatory external single-point grounding to minimize crosstalk. Thermal resistance is 10°C/W junction-to-case, supporting continuous operation up to 125°C case temperature with appropriate PCB copper area.

Key Specifications

Pinout & Package

STPIC6A259MTR is housed in a thermally enhanced SO-24 package (batwing lead form) with exposed thermal pad on underside. Pin count: 24. Package dimensions: 15.6 × 10.65 mm, 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-channel addressable power latch applications.

Compared with TPL7407LPWR and ULN2803ADWR, STPIC6A259MTR uniquely combines addressable control, per-channel current limiting, 75mJ avalanche ruggedness, and fast 30 ns turn-off - making it optimal for space-constrained, fault-aware industrial I/O where flexibility and resilience are critical.

Availability

STPIC6A259MTR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, smart building relay controllers, and automated test equipment requiring stable component supply and long-term lifecycle support.

Supply support for STPIC6A259MTR 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, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

STPIC6A259 belongs to ST's Power Logic family, engineered specifically for high-voltage, high-current digital interface applications where integrated protection, thermal resilience, and flexible control modes replace discrete power stage designs.

FAQ

What are the four functional modes of STPIC6A259MTR and how are they selected?

The four modes-addressable latch, 8-line demultiplexer, memory hold, and clear-are selected solely by the logic states of CLR and G inputs. For example, CLR = L and G = L enables demux mode; CLR = L and G = H enables latch mode. The function table in the datasheet defines exact combinations, and no clock or additional control signals are required.

Does STPIC6A259MTR require external current-sense or protection components?

No. Each DMOS output integrates a dedicated current-limiting circuit that activates at 600–1100 mA, preventing thermal damage during short circuits. Combined with 75 mJ avalanche energy rating and internal clamp structures, it operates safely without external sense resistors, fuses, or TVS diodes in typical 24V/48V load applications.

How should LGND and PGND be connected in a PCB layout?

LGND and PGND must be connected at a single point only-typically near the device or at the system power entry point-to avoid ground loops. All PGND pins must be routed to the main power ground plane with low-inductance traces, while LGND connects to the digital logic ground. Separation preserves signal integrity and prevents load-switching noise from disrupting MCU operation.

Can STPIC6A259MTR drive inductive loads like relays without external flyback diodes?

Yes. Its 75 mJ single-pulse avalanche energy rating allows safe dissipation of inductive kickback from typical 24V relay coils (e.g., 100–500 mH, 350 mA). This eliminates the need for external flyback diodes in most cases, though designers should verify peak energy per application using E = ½ × L × I² and confirm within the 75 mJ limit.