Texas Instruments TPS3779DDRYR

Overview

TPS3779DDRYR from Texas Instruments is a dual-channel, low-power, high-accuracy voltage detector in a 1.45 mm × 1.00 mm µSON-6 package. It features push-pull outputs, 1% threshold accuracy, 2 µA typical quiescent current, and operates from 1.5 V to 6.5 V over –40°C to 125°C - enabling precise rail monitoring in space-constrained, battery-powered systems such as portable medical devices and SSDs.

For engineers reviewing the TPS3779DDRYR datasheet, TPS3779DDRYR pinout, TPS3779DDRYR application, or TPS3779DDRYR equivalent, this page delivers verified specifications, validated pin functions, confirmed dual-rail monitoring use cases, and two technically documented alternative parts - all aligned with TI's SBVS250 (April 2015) production data sheet.

Technical Context

The TPS3779DDRYR integrates two independent comparators with internal reference trimming for ±1% VIT+ accuracy and factory-set 1% hysteresis (TPS3779D variant). Each SENSE input accepts 0–6.5 V regardless of VDD, supporting flexible resistor-divider configurations for adjustable detection thresholds down to 1.2 V.

Its push-pull outputs drive high/low without external pull-ups, with VOH = 0.8×VDD (min) at ISOURCE = 2.5 mA and VOL = 0.3 V (max) at ISINK = 3.2 mA. Startup delay is fixed at 570 µs after VDD crosses VDD(min), and propagation delays are 5.5 µs (rising) and 10 µs (falling) under nominal conditions.

Key Specifications

Pinout & Package

TPS3779DDRYR uses a 6-pin µSON package (DRY), 1.45 mm × 1.00 mm, 0.5-mm pitch, wettable flank, RoHS-compliant. Thermal resistance RθJA = 306.7°C/W enables operation in compact, unventilated enclosures.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel voltage detector applications.

Compared with TPS3779DDRYR, the TPS3779DBVR trades miniaturization for thermal headroom, while the TPS3780DDBVR replaces push-pull drive with open-drain flexibility - neither is pin-compatible without layout revision, but both serve overlapping dual-supervision use cases with documented trade-offs.

Availability

TPS3779DDRYR is available at Aetrix Electronics and suitable for portable medical devices, solid-state drives, and building automation sensors requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TPS3779DDRYR 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 leader specializing in analog, embedded processing, and power management ICs, with decades of expertise in precision voltage supervision and low-power system monitoring.

The TPS37xx family was designed specifically for dual-rail, high-accuracy power sequencing in space- and energy-constrained applications - delivering factory-trimmed thresholds, ultra-low IDD, and robust operation across extended temperature ranges.

FAQ

What is the exact hysteresis value specified for TPS3779DDRYR?

The TPS3779DDRYR is the 'D' variant in the TPS3779 family and is factory-set to 1% hysteresis, meaning VHYS = 1% × VIT+. This value is trimmed and tested during production and remains stable across –40°C to 125°C, as confirmed in Section 5 (Device Comparison Table) and Section 7.5 (Electrical Characteristics) of the SBVS250 datasheet. The TPS3779DDRYR does not support user-adjustable hysteresis.

Can TPS3779DDRYR monitor a 1.2-V rail directly?

No - the TPS3779DDRYR SENSE inputs require an external resistor divider to scale higher voltages down to its internal reference range. Its minimum detectable threshold is 1.2 V *only* when configured with appropriate R1/R2 values (e.g., 1.2 V at SENSE1 corresponds to ~2.4 V at the monitored rail using a 1:1 divider). The device itself does not accept sub-1.2-V inputs directly, as VIT+ starts at 1.182 V (TPS3779D) per Section 7.5.

Is TPS3779DDRYR pin-compatible with TPS3780DDRYR?

No - although both share the DRY µSON-6 package and identical pin numbering (SENSE1, GND, SENSE2, OUT2, OUT1, VDD), the TPS3779DDRYR has push-pull outputs while the TPS3780DDRYR has open-drain outputs. Swapping them requires redesigning pull-up networks and verifying logic-level compatibility; they are functionally related but not pin-compatible replacements.

What is the maximum sink current capability of TPS3779DDRYR outputs?

The TPS3779DDRYR OUT1 and OUT2 pins each support a minimum sink current of 3.2 mA at VOL ≤ 0.3 V (VDD ≥ 4.5 V), per Section 7.5 Electrical Characteristics. This is sufficient to directly drive standard CMOS reset inputs (e.g., ARM Cortex-M series) without external buffers, and exceeds the 1.6-mA requirement of most microcontrollers' reset pins.

Does TPS3779DDRYR require a bypass capacitor on VDD?

Yes - a 0.1-µF ceramic capacitor is required between VDD and GND, placed as close as possible to the TPS3779DDRYR package per Section 11.1 Layout Guidelines and Section 7.3 Recommended Operating Conditions. This capacitor stabilizes the internal reference and prevents false triggering during VDD transients, especially critical below 1.5 V operation (though TPS3779DDRYR's minimum VDD is 1.5 V).