STMicroelectronics STPIC6D595B1R

Overview

STPIC6D595B1R 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, designed for LED driver and moderate-load switching applications in industrial control panels and display backlights.

For engineers reviewing the STPIC6D595B1R datasheet, STPIC6D595B1R pinout, STPIC6D595B1R application, or STPIC6D595B1R equivalent, key selection criteria include output current capability, thermal derating behavior, cascading support via SER OUT, and DIP-16 package compatibility with through-hole prototyping and legacy PCB layouts.

Technical Context

The device integrates two synchronous clock domains: SRCK controls serial data shifting into the 8-bit shift register, while RCK latches data from the shift register into the 8-bit D-type storage register. Output enable (G) acts as a global active-low output control, and CLR provides asynchronous reset of the shift register.

All eight outputs are independent low-side DMOS transistors with internal current limiting (250 mA peak), ESD protection (2.0 kV HBM), and thermal foldback-current limit decreases with rising junction temperature to prevent thermal runaway under sustained overload.

Key Specifications

Pinout & Package

DIP-16 package: 0.3-inch wide dual in-line package with through-hole mounting, compatible with standard 0.1-inch grid protoboards and legacy industrial PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC6C5912QPWR and TPIC6B595N, STPIC6D595B1R uniquely combines DIP-16 through-hole compatibility, 250 mA thermally adaptive current limiting, and 2.0 kV HBM ESD rating-making it optimal for cost-sensitive, serviceable industrial panels where reliability under variable load conditions is essential.

Availability

STPIC6D595B1R is available at Aetrix Electronics and suitable for LED backlighting, industrial I/O expansion, and appliance panel indicator driving requiring stable component supply across long-lifecycle manufacturing programs.

Supply support for STPIC6D595B1R 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, delivering intelligent power, analog, MEMS, and microcontroller solutions for industrial, automotive, and consumer markets.

The STPIC6D595 belongs to ST's Power Logic family-designed specifically for robust, low-cost, high-current digital output expansion in space-constrained and thermally demanding industrial control applications.

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 remains rated at 100 mA, but the 250 mA pulsed current limit begins to decrease due to thermal foldback. The datasheet specifies R_DS(on) increases to 4.8–6 Ω at this temperature, raising conduction loss-but no derating of the 100 mA DC rating is required unless ambient or layout limits thermal dissipation.

Can STPIC6D595B1R drive 12 V LEDs directly without external components?

Yes-each Q0–Q7 output can sink up to 100 mA continuously with 20 V V_DS rating, allowing direct connection to 12 V LED strings when the LED anode is tied to 12 V and cathode to the output pin. No series resistor is needed if LED forward current matches the 100 mA rating and V_F is ≤11.5 V.

How does the CLR pin interact with the storage register during operation?

The CLR pin asynchronously clears only the 8-bit shift register-not the storage register or output buffer. Data already latched into the storage register by RCK remains active at the outputs until overwritten by new data shifted in and latched. This allows safe reset of incoming data without disrupting currently driven loads.

Is the DIP-16 version (B1R) functionally identical to SO-16 and TSSOP16 variants?

Yes-STPIC6D595B1R shares identical electrical specifications, timing, thermal characteristics, and logic behavior with STPIC6D595MTR and STPIC6D595TTR. Only package type, thermal resistance (R_th(JA) = 85 °C/W for DIP-16), and mounting method differ; no performance or functional trade-offs exist between variants.