STMicroelectronics STPIC6D595TTR

Overview

STPIC6D595TTR 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 20 V drain-source voltage rating. It operates from 4.5–5.5 V logic supply and supports cascading for LED driver expansion in industrial signage and display systems.

For engineers reviewing the STPIC6D595TTR datasheet, STPIC6D595TTR pinout, STPIC6D595TTR application, or STPIC6D595TTR equivalent, key selection criteria include output current limit (250 mA peak), thermal derating behavior, ESD robustness (2.0 kV HBM), and TSSOP16 footprint compatibility with legacy STPIC6C595 designs.

Technical Context

The device integrates two synchronous clock domains: SRCK controls serial data shifting into the 8-bit shift register, while RCK latches data into the 8-bit D-type storage register. SER OUT enables daisy-chaining by propagating shifted data on the rising edge of SRCK.

Output enable (G) and shift register clear (CLR) provide independent control over output state transparency and shift register initialization. All eight DMOS outputs are low-side, ground-referenced, with internal current limiting that reduces trip threshold as junction temperature rises-ensuring safe operation up to 125 °C case temperature.

Key Specifications

Pinout & Package

TSSOP16 package: 5 mm × 4.4 mm body, 0.65 mm pitch, 1.2 mm max height, lead-free and RoHS-compliant per ECOPACK® specifications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPIC6B595N and NCV7608BDR2G, the STPIC6D595TTR offers optimal balance of thermal protection, compact TSSOP16 packaging, and cost efficiency for non-diagnostic LED and industrial load control-without sacrificing robustness or timing precision.

Availability

STPIC6D595TTR is available at Aetrix Electronics and suitable for LED display driver, industrial I/O expander, and automotive interior lighting applications requiring stable component supply and long-term manufacturability.

Supply support for STPIC6D595TTR 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 microcontrollers, power ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The STPIC6D595 belongs to ST's Power Logic family-engineered specifically for robust, high-current serial-to-parallel interfacing in space-constrained, thermally demanding applications such as LED signage and programmable logic controllers.

FAQ

What is the maximum clock frequency supported on SRCK and RCK?

The STPIC6D595TTR supports SRCK and RCK frequencies up to 5 MHz under recommended operating conditions (V_CC = 4.5–5.5 V, T_C = −40 to +125 °C). At 5 MHz, logic supply current increases to 250 μA, and propagation delays remain within 13–90 ns. Higher frequencies may cause timing violations or increased jitter due to internal gate delays.

Can STPIC6D595TTR drive 12 V LED strings directly?

No-it cannot drive 12 V LED strings directly because its DMOS outputs are low-side open-drain with 20 V V_DS rating but require external pull-up to the LED string's positive rail. The IC sinks current from the LED cathode; the anode must connect to 12 V via current-limiting resistor or constant-current source.

How does the current limit behave across temperature?

The 250 mA peak current limit decreases linearly as junction temperature rises above 25 °C, providing inherent thermal foldback. At T_J = 125 °C, the trip threshold drops to approximately 125 mA-protecting the device during sustained overload or poor PCB thermal design without external circuitry.

Is STPIC6D595TTR pin-compatible with STPIC6C595?

Yes-STPIC6D595TTR is footprint-compatible with STPIC6C595 in TSSOP16, sharing identical pinout and logic interface. However, STPIC6D595 adds DMOS power outputs (100 mA/channel, 20 V), whereas STPIC6C595 uses bipolar Darlington outputs (100 mA, 50 V) with higher V_CE(sat) and no thermal current limiting.