Texas Instruments TPS3899DL13DSER

Overview

TPS3899DL13DSER from Texas Instruments is a nano-power, precision voltage supervisor with push-button monitoring capability, ±0.5% threshold accuracy, 125nA typical quiescent current, and programmable sense/reset delay via external capacitors on CTS/CTR pins - used in battery-powered industrial and computing systems to ensure reliable power-on reset and fault recovery.

For engineers reviewing the TPS3899DL13DSER datasheet, TPS3899DL13DSER pinout, TPS3899DL13DSER application, or TPS3899DL13DSER equivalent, key selection considerations include its open-drain active-low RESET output, 0.505V adjustable threshold, 1.5mm × 1.5mm WSON-6 package, –40°C to +125°C operation, and dual-delay programmability for glitch-immune rail and push-button monitoring.

Technical Context

The TPS3899DL13DSER implements a precision comparator with built-in 5% hysteresis and independent capacitor-programmable timing paths: CTS sets sense delay (assertion) from 30µs to ~6.5s, while CTR sets reset delay (deassertion) over the same range. Its SENSE pin operates independently of VDD (0–6V input range), enabling rail redundancy and push-button debouncing.

It features functional safety support documentation, dual internal pull-up resistors (500kΩ on CTS/CTR), and glitch immunity up to 10µs at 5% VIT– overdrive. The DL variant uses open-drain RESET requiring external pull-up, supporting interface-level flexibility up to 6V regardless of VDD (0.85–6V).

Key Specifications

Pinout & Package

Package: 1.5mm × 1.5mm WSON-6 (DSE), thermally enhanced, exposed pad (no thermal pad connection required in standard layout).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Compared with TPS3899DL13DSER, the PL variant simplifies BOM by eliminating the pull-up resistor but sacrifices interface voltage flexibility; the TPS3897DL13DSER reduces IQ by 60% but removes adjustable threshold and push-button functionality - trade-offs require matching to specific system timing, power, and configurability needs.

Availability

TPS3899DL13DSER is available at Aetrix Electronics and suitable for electricity meters, building automation controllers, body control modules, and portable SSDs requiring stable component supply, long-lifecycle assurance, and automotive-grade temperature performance.

Supply support for TPS3899DL13DSER 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 delivering analog and embedded processing solutions, with over 90 years of innovation in power management, signal chain, and real-time control ICs.

The TPS3899 product line delivers ultra-low-power, precision supervisors for mission-critical power sequencing and fault monitoring in battery-constrained and high-reliability systems - designed specifically for industrial, automotive, and computing applications demanding accuracy, configurability, and extended temperature operation.

FAQ

What is the function of the CTS pin on the TPS3899DL13DSER?

The CTS pin on the TPS3899DL13DSER sets the sense delay - the time between SENSE voltage crossing below V_IT– and RESET assertion. Connected to a ground-referenced capacitor, it provides programmable delay from 30µs to ~6.5s; left floating, it defaults to ~50µs. It also serves as a hardware debouncer for push-button inputs, ignoring transients shorter than its configured delay. This behavior is intrinsic to the TPS3899DL13DSER's architecture and documented in Section 6.3.2 of its datasheet.

Does the TPS3899DL13DSER require an external pull-up resistor on the RESET pin?

Yes, the TPS3899DL13DSER uses an open-drain active-low RESET output and requires an external pull-up resistor to the desired logic rail (up to 6V). The resistor value (typically 10kΩ–100kΩ) balances rise time and power consumption. Unlike push-pull variants (e.g., TPS3899PL13DSER), the TPS3899DL13DSER cannot drive high actively - this design enables voltage-level translation and wired-OR reset bus configurations, a key feature of the TPS3899DL13DSER.

Can the TPS3899DL13DSER monitor a voltage rail higher than its VDD supply?

Yes, the TPS3899DL13DSER's SENSE pin accepts 0–6V independent of VDD (0.85–6V), enabling monitoring of higher-voltage rails - for example, supervising a 5V system rail while powered from a 1.8V domain. This separation supports redundant power monitoring architectures and eliminates level-shifters. The TPS3899DL13DSER datasheet explicitly specifies this capability in Section 6.3.4 and Table 5-1, confirming true rail independence.

What is the minimum VDD voltage required for the TPS3899DL13DSER to assert a valid RESET signal?

TPS3899DL13DSER requires VDD ≥ 0.85V to operate, but a controlled RESET assertion requires VDD ≥ V_POR = 700mV (for DL variants). Below 700mV, RESET state is undefined per Section 5.5. Once VDD exceeds 700mV, the device enters normal operation after startup delay (t_STRT ≤ 300µs), and RESET responds predictably to SENSE transitions. This POR threshold is a defined specification of the TPS3899DL13DSER, not a recommendation.

How does the TPS3899DL13DSER achieve glitch immunity on the SENSE pin?

The TPS3899DL13DSER achieves glitch immunity through two mechanisms: built-in 5% hysteresis (V_HYS) preventing chatter near threshold, and CTS-programmable sense delay that inherently filters transients shorter than the configured delay. For example, with CTS = 10nF, minimum detectable glitch is ~6.2ms. Section 5.6 specifies t_{GI_VIT–} = 10µs at 5% overdrive - a hard limit validated in characterization. This dual-layer immunity is a core architectural feature of the TPS3899DL13DSER.