Texas Instruments TL7759CPWR

Overview

TL7759CPWR from Texas Instruments is a supply-voltage supervisor IC designed for microcomputer and microprocessor system reset control. It monitors VCC for undervoltage conditions, provides true and complementary reset outputs (RESET and RESET), features a precision 4.55 V ±120 mV input threshold, operates across 1 V to 7 V supply range, and delivers low standby current of 20 µA. It ensures reliable power-on and brownout reset in embedded controllers.

For engineers reviewing the TL7759CPWR datasheet, TL7759CPWR pinout, TL7759CPWR application, or TL7759CPWR equivalent, key selection criteria include its dual active-high/active-low reset outputs, 5 µs propagation delay, 50 mV typical hysteresis, and TSSOP-8 package compatibility with space-constrained industrial control and legacy MCU designs.

Technical Context

The TL7759CPWR implements a precision bandgap reference-based comparator architecture to detect VCC crossing the 4.55 V threshold during power-up and brownout events. Its internal hysteresis (30–70 mV) prevents output oscillation near the trip point, and reset outputs are guaranteed defined when VCC exceeds 1 V.

It features open-drain RESET and push-pull RESET outputs capable of sinking 24 mA and sourcing –8 mA respectively at VCC = 4.3 V. The device requires no external components for basic operation and supports direct connection to microcontroller reset inputs with pull-up resistors.

Key Specifications

Pinout & Package

TSSOP-8 package (PW), 3.0 mm × 4.4 mm body, 0.65 mm lead pitch, 1.2 mm max height, RoHS-compliant NIPDAU finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL7759CPWR, the TPS3808G33DBVR offers superior power efficiency but sacrifices dual-output flexibility and fixed 4.55 V accuracy for 3.3 V systems, while the MAX809SEUR+T reduces size and cost at the expense of hysteresis control and complementary signaling capability.

Availability

TL7759CPWR is available at Aetrix Electronics and suitable for industrial automation, automotive ECU, and medical device applications requiring stable component supply, long-lifecycle support, and RoHS-compliant TSSOP packaging.

Supply support for TL7759CPWR 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, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.

The TL77xx family was engineered specifically for reliable, low-cost power-supply monitoring in microcontroller-based systems - emphasizing precision threshold accuracy, dual-output flexibility, and wide-VCC operability without external components.

FAQ

What is the exact input threshold voltage specification for TL7759CPWR?

The TL7759CPWR has a nominal input threshold voltage of 4.55 V with a tolerance of ±120 mV over the full operating temperature range (0°C to 70°C). The negative-going threshold (VIT–) is specified from 4.4 V to 4.7 V, and hysteresis ranges from 30 mV to 70 mV. These values are measured under recommended operating conditions and are confirmed in the SLVS042D datasheet revision July 1999.

Does TL7759CPWR require external components to function?

No, TL7759CPWR operates autonomously with no external components required for basic reset generation. Its internal precision reference and comparator eliminate the need for external resistors or capacitors. However, an external pull-up resistor is necessary for the open-drain RESET output, and decoupling capacitance (e.g., 0.1 µF) on VCC is recommended per standard analog design practice.

What is the maximum propagation delay of TL7759CPWR reset outputs?

The TL7759CPWR guarantees a maximum propagation delay of 5 µs for both tPLH (low-to-high on RESET) and tPHL (high-to-low on RESET), measured under TA = 25°C with VCC slew rate ≤5 V/µs. This timing is consistent across the full 0°C to 70°C operating range and ensures deterministic reset response in time-critical microcontroller applications.

Can TL7759CPWR be used in 3.3 V systems?

Yes, TL7759CPWR supports supply voltages from 1 V to 7 V, making it fully compatible with 3.3 V systems. While its 4.55 V threshold is optimized for 5 V rails, it remains functional in 3.3 V environments where monitoring of higher auxiliary supplies (e.g., 5 V I/O rails) or cascaded reset sequencing is required. For dedicated 3.3 V supply supervision, a device with lower threshold (e.g., 3.08 V) would be more appropriate.

What does the "PW" in TL7759CPWR indicate about its package?

The "PW" suffix in TL7759CPWR denotes the TSSOP (Thin Shrink Small Outline Package) variant - an 8-pin, surface-mount package with 0.65 mm lead pitch, 3.0 mm × 4.4 mm body size, and 1.2 mm maximum height. It is RoHS-compliant with NIPDAU lead finish, MSL Level-1 rating, and supplied in tape-and-reel format (2000 units per reel), optimized for automated PCB assembly.