Texas Instruments TPS3422EGDRYR

Overview

TPS3422EGDRYR from Texas Instruments is a single-channel, low-power push-button reset controller with fixed 400-ms active-low open-drain reset pulse, 7.5-s (TS = GND) or 0-s (TS = VCC) configurable button hold-time delay, and 1.6 V to 6.5 V supply range. It integrates an internal PB1 pullup resistor (65 kΩ), operates across –40°C to +125°C, and targets space-constrained portable electronics requiring reliable user-initiated system reset.

For engineers reviewing the TPS3422EGDRYR datasheet, TPS3422EGDRYR pinout, TPS3422EGDRYR application, or TPS3422EGDRYR equivalent, key selection criteria include standby current (3.3 µA max at 6.5 V), fixed tRST timing stability over temperature, TS pin configuration impact on tTIMER, open-drain RST interface compatibility, and USON-6 package footprint constraints.

Technical Context

The TPS3422EGDRYR implements a digital logic-based delay generator with oscillator-controlled timing, where the TS pin selects between two factory-configurable tTIMER options (0 s or 7.5 s typical). Its internal pullup on PB1 eliminates external components for single-button operation.

Reset assertion requires PB1 held low ≥tTIMER; deassertion occurs after a fixed 400-ms (typical) tRST pulse regardless of PB1 state. The open-drain RST output supports wire-OR with other reset sources and interfaces to logic rails up to 6.5 V independent of VCC.

Key Specifications

Pinout & Package

TPS3422EGDRYR uses a 6-pin USON (DRY) package measuring 1.45 mm × 1.00 mm × 0.5 mm, optimized for ultra-compact PCB layouts in mobile and wearable applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar push-button reset controller applications.

Compared with TPS3422EGDRYR, TPS3421EGDRYR adds dual-input logic but shares identical timing precision and ultra-low power, while MAX6316PUK46D3+ offers longer timeout in a less compact package with reduced voltage flexibility.

Availability

TPS3422EGDRYR is available at Aetrix Electronics and suitable for smartphone power management, wearable device recovery, and industrial HMI panel reset applications requiring stable component supply, long-term lifecycle support, and AEC-Q200-aligned reliability.

Supply support for TPS3422EGDRYR 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 timing and system-level power control solutions.

The TPS342x family was designed specifically for ultra-low-power, space-constrained portable electronics needing robust, user-initiated system reset functionality without MCU dependency or external timing components.

FAQ

What is the function of the TS pin on the TPS3422EGDRYR?

The TS pin on the TPS3422EGDRYR selects between two push-button timer durations: connecting TS to GND configures tTIMER to 7.5 s (typical), while connecting TS to VCC sets it to 0 s (factory test mode only). This pin must remain statically tied during normal operation and is sampled at power-up or when PB1 is high.

Can the TPS3422EGDRYR operate from a 1.8-V supply?

Yes, the TPS3422EGDRYR supports supply voltages from 1.6 V to 6.5 V, making it fully compatible with 1.8-V systems. At 1.8 V, standby current remains below 1 µA, and all timing specifications-including 400-ms tRST and 7.5-s tTIMER-remain valid across the full operating temperature range.

Does the TPS3422EGDRYR require an external pullup resistor on the RST pin?

Yes, the TPS3422EGDRYR features an open-drain RST output and requires an external pullup resistor to establish the high state. The resistor value must balance rise time (based on node capacitance) and VOL compliance (≤0.4 V at 8 mA sink); 10-kΩ to 100-kΩ is typical for 3.3-V logic interfaces.

How does the internal PB1 pullup resistor affect system design?

TPS3422EGDRYR includes a 65-kΩ internal pullup on PB1, eliminating the need for an external resistor. This reduces BOM count and PCB area, simplifies layout, and ensures consistent input biasing. Designers must account for this fixed pullup when calculating button drive strength and debounce timing.

Is the 400-ms reset pulse duration of the TPS3422EGDRYR affected by temperature or supply voltage?

No-the 400-ms reset pulse duration (tRST) of the TPS3422EGDRYR is factory-programmed and highly stable, varying only ±20% over –40°C to +125°C and 1.6 V to 6.5 V. Typical variation is ±4% (384–416 ms), as confirmed by Figure 7 in the SBVS211B datasheet.