STMicroelectronics STPIC6D595MTR

Overview

STPIC6D595MTR from STMicroelectronics is an 8-bit serial-in, parallel-out power shift register with eight low-side open-drain DMOS outputs, 4 Ω typical R_DS(on), 100 mA continuous sink current per channel, and 250 mA pulsed current limit at T_C = 25 °C. It operates from 4.5–5.5 V logic supply and supports cascading via SER OUT for LED driver arrays and industrial I/O expansion.

For engineers reviewing the STPIC6D595MTR datasheet, STPIC6D595MTR pinout, STPIC6D595MTR application, or STPIC6D595MTR equivalent, key selection criteria include output current capability, thermal derating behavior, ESD robustness (2.0 kV HBM), SO-16 package footprint compatibility with STPIC6C595, and low-power operation down to -40 °C.

Technical Context

The device integrates a dual-register architecture: an 8-bit shift register clocked by SRCK and an 8-bit D-type storage register clocked by RCK. Data propagates from SER IN to SER OUT on rising SRCK edges, then transfers to output buffers only when RCK rises and CLR is high.

Outputs are low-side, open-drain DMOS transistors with internal current limiting that decreases with junction temperature-ensuring safe operation under overload. Output enable (G) controls buffer transparency: G = low enables output drive; G = high forces all outputs low and disables sinking.

Key Specifications

Pinout & Package

STPIC6D595MTR is housed in a 16-pin SOIC (SO-16) package with 1.27 mm pitch, RoHS-compliant, tape-and-reel format (2500 units/reel). The package meets ECOPACK® environmental standards and offers 107 °C/W junction-to-ambient thermal resistance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit power shift register applications.

Compared with STPIC6C595MTR, STPIC6D595MTR adds DMOS ruggedness, current limiting, and ESD protection-critical for industrial noise environments. Versus TPL9201PWR, it trades programmability for simpler SPI-like control and seamless daisy-chaining scalability.

Availability

STPIC6D595MTR is available at Aetrix Electronics and suitable for LED display systems, industrial PLC I/O modules, and automotive interior lighting requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STPIC6D595MTR 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The STPIC6x series targets medium-voltage, moderate-current digital power interfacing-specifically engineered to replace discrete transistor arrays in LED, relay, and solenoid driver applications with integrated protection and simplified layout.

FAQ

What is the maximum safe continuous current per output at 85 °C case temperature?

At T_C = 85 °C, the continuous current per output is derated to approximately 120 mA nominal (based on 0.5 V V_DS(on) definition), with R_DS(on) increasing to 4.8 Ω typical. Full 100 mA operation remains valid, but thermal design must ensure junction temperature stays within -40 °C to +150 °C limits using the SO-16 R_th(JA) of 107 °C/W.

Can STPIC6D595MTR drive 12 V relays directly without external components?

Yes-it supports V_DS up to 20 V and delivers 100 mA continuous per channel, sufficient for most 12 V, 100–500 Ω coil relays (drawing 24–120 mA). No external flyback diode is required since the DMOS includes an integrated body diode, though adding an external diode improves longevity under frequent switching.

How does the current limit behave during sustained overload conditions?

The 250 mA current limit is thermally modulated: as junction temperature rises, the trip threshold decreases progressively to prevent thermal runaway. At T_J = 125 °C, the limit drops to ~150 mA. This foldback behavior is inherent to the DMOS structure and requires no external circuitry.

Is the SER OUT pin compatible with standard 5 V TTL logic inputs?

Yes-SER OUT is a buffered CMOS output with VOH ≥ 4.4 V and VOL ≤ 300 mV at V_CC = 4.5 V and I_O = ±4 mA, meeting standard TTL and CMOS input thresholds. It drives one standard CMOS input directly or up to 10 LVTTL loads with appropriate trace routing and termination.