Texas Instruments TPIC6B596DWG4

Overview

TPIC6B596DWG4 from Texas Instruments is a monolithic 8-bit serial-in, parallel-out power shift register with low-side open-drain DMOS transistor outputs. It delivers 150 mA continuous sink current per channel, 50 V output clamp voltage, and 5 Ω typical rDS(on) at 100 mA, enabling direct driving of automotive relays, solenoids, and LED arrays in instrument clusters and tell-tale lamp systems.

For engineers reviewing the TPIC6B596DWG4 datasheet, TPIC6B596DWG4 pinout, TPIC6B596DWG4 application, or TPIC6B596DWG4 equivalent, key selection criteria include its −40°C to 125°C operating case temperature range, cascaded SEROUT timing on SRCK falling edge, global output enable (G) for PWM dimming, and integrated avalanche energy rating of 30 mJ for inductive load robustness.

Technical Context

The TPIC6B596DWG4 integrates an 8-bit shift register cascaded to an 8-bit D-type storage register, with independent clocking: data shifts on SRCK rising edge and latches to outputs on RCK rising edge. All registers clear synchronously via active-low SRCLR, and output buffers are enabled only when G is low.

Each of the eight low-side DMOS outputs provides 50 V breakdown voltage, 150 mA continuous sink current, and 500 mA typical current limiting at TC = 25°C - with thermal derating to protect against junction overheating during sustained loads or multiple-output conduction.

Key Specifications

Pinout & Package

TPIC6B596DWG4 uses a 20-pin SOIC (DW) package with 12.80 mm × 7.50 mm body size and 2.65 mm maximum height. Pin 1 is marked by a beveled corner; pins 10, 11, and 19 are internally connected to GND for thermal and noise performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPIC6B595DW and ULN2803ADW, the TPIC6B596DWG4 uniquely combines serial-in/parallel-out logic, synchronous register clear, per-channel current limiting, and avalanche ruggedness - making it the only option among the three qualified for automotive-grade daisy-chained power control without supplemental circuitry.

Availability

TPIC6B596DWG4 is available at Aetrix Electronics and suitable for automotive instrumentation clusters, tell-tale lamp systems, LED illumination arrays, and relay/solenoid driver modules requiring stable component supply across extended temperature and lifecycle requirements.

Supply support for TPIC6B596DWG4 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

Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and power management technologies, with decades of leadership in automotive and industrial IC design.

The TPIC6B596DWG4 belongs to TI's Power Logic family-designed specifically for high-reliability, medium-current switching in automotive and industrial control systems where integration, ruggedness, and thermal resilience are mandatory.

FAQ

What is the maximum continuous current per output of the TPIC6B596DWG4?

The TPIC6B596DWG4 supports 150 mA continuous sink current per output at TC = 25°C. This rating decreases with increasing case temperature due to thermal derating-down to approximately 90 mA at TC = 85°C per Figure 6-5. The device also provides 500 mA typical current limiting per output at 25°C, which further reduces as junction temperature rises to prevent thermal damage.

Does the TPIC6B596DWG4 require external clamping diodes when driving relays?

No, the TPIC6B596DWG4 does not require external clamping diodes. It features an integrated 50 V output clamp and 30 mJ single-pulse avalanche energy rating, explicitly designed to absorb inductive flyback from automotive relays and solenoids. This eliminates the need for external TVS diodes or freewheeling diodes in most standard 12 V/24 V applications.

Can the TPIC6B596DWG4 be used in daisy-chain configurations?

Yes, the TPIC6B596DWG4 supports robust daisy-chaining via its SEROUT pin, which clocks data out on the falling edge of SRCK. This timing provides additional hold time for cascaded stages, improving tolerance to clock skew, trace-length mismatches, and electromagnetic interference-enabling reliable operation across multi-device chains at up to 10 MHz serial clock frequency.

What is the function of the G (output enable) pin on the TPIC6B596DWG4?

The G pin on the TPIC6B596DWG4 is an active-low output enable that globally controls all eight DMOS outputs. When G is high, all outputs are forced low and disabled; when G is low, data from the storage register passes transparently to the output buffers. This pin also supports global PWM dimming when driven with a variable-duty-cycle signal, enabling synchronized brightness control across all channels.

Is the TPIC6B596DWG4 pin-compatible with other devices in the TPIC6x596 family?

Yes, the TPIC6B596DWG4 shares identical pinout and package (SOIC-20 DW) with TPIC6B596DWR and TPIC6B596N, and is functionally compatible with TPIC6A595 variants in non-clear and non-current-limited use cases. However, it is not pin-compatible with TPIC6B595DW due to the absence of SRCLR and different internal current-limit architecture-requiring schematic and firmware review before substitution.