Texas Instruments TL7759CPW

Overview

TL7759CPW from Texas Instruments is a supply-voltage supervisor IC designed for power-on reset generation and undervoltage monitoring in microcomputer systems. It 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, draws only 20 µA standby current, and guarantees defined reset states when VCC exceeds 1 V.

For engineers reviewing the TL7759CPW datasheet, TL7759CPW pinout, TL7759CPW application, or TL7759CPW equivalent, this device serves as a critical reset controller where reliable power sequencing, brownout detection, and deterministic system initialization are required in industrial and embedded control applications.

Technical Context

The TL7759CPW integrates a precision voltage reference, comparator with hysteresis (30–70 mV), and dual open-collector output drivers. Its internal circuitry ensures automatic reset assertion during power-up when VCC rises above ~1 V and reassertion upon VCC dropping below the negative-going threshold (VIT– = 4.4–4.7 V).

It delivers 24 mA sink capability on RESET and supports high-level output up to VCC–1 V on RESET, with propagation delays under 5 µs and rise/fall times ≤1 µs at 25°C. The device is characterized for 0°C to 70°C operation and uses a fixed internal threshold-no external resistor network required.

Key Specifications

Pinout & Package

TSSOP-8 (PW) package: 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 supervision applications.

Compared with TPS3808G01DBVR and MAX691CPA+, the TL7759CPW delivers simpler, lower-cost reset control with guaranteed sub-5 µs response and complementary outputs in a space-efficient TSSOP-8 package-ideal for cost-sensitive, timing-critical 5 V embedded systems without need for programmability or watchdog functionality.

Availability

TL7759CPW is available at Aetrix Electronics and suitable for industrial PLC controllers, embedded data acquisition units, medical handheld diagnostics, automotive body control modules, and other applications requiring stable component supply with consistent parametric performance across production batches.

Supply support for TL7759CPW 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 founded in 1930, specializing in analog, embedded processing, and power management technologies with broad industrial and automotive design expertise.

The TL7759CPW belongs to TI's legacy supply-voltage supervisor product line, engineered specifically for deterministic power-on reset generation and undervoltage lockout in microcontroller-based systems operating from 1 V to 7 V rails.

FAQ

What is the exact input voltage threshold specification for TL7759CPW?

The TL7759CPW has a negative-going input threshold voltage (VIT–) of 4.4 V minimum to 4.7 V maximum over its full operating temperature range (0°C to 70°C). At 25°C, the typical value is 4.55 V ±120 mV. This threshold determines the supply voltage level at which the device asserts reset during a brownout condition, and it is factory-trimmed-not adjustable externally.

Does TL7759CPW require external components to function as a reset generator?

No, the TL7759CPW operates autonomously with only VCC and GND connections. Its 4.55 V threshold is internal and fixed. External pull-up resistors are required on the open-collector RESET output, and optional pull-down may be used on RESET depending on load interface, but no timing capacitors, dividers, or bias networks are needed for basic reset generation.

What is the meaning of "NC" pins on the TL7759CPW TSSOP-8 package?

The TL7759CPW has four NC (No Connection) pins - pins 2, 3, 4, and 7 - which have no internal bonding or electrical function. These pins must remain unconnected in the schematic and layout. They may be grounded for mechanical stability or EMI reduction, but must never be driven or loaded, as they are electrically isolated from the die.

Can TL7759CPW be used with a 3.3 V supply rail?

Yes, the TL7759CPW supports supply voltages from 1 V to 7 V, making it fully compatible with 3.3 V systems. However, its 4.4–4.7 V threshold means it will assert reset whenever VCC drops below that range - so it is typically used to monitor a higher auxiliary rail (e.g., 5 V) that powers the 3.3 V regulator, rather than supervising the 3.3 V rail directly.

Is TL7759CPW pin-compatible with other members of the TL77xx family?

Yes, the TL7759CPW shares identical pinout and footprint with other TL77xx devices in TSSOP-8 (PW) packaging, including TL7705CPW and TL7709CPW. However, threshold voltages differ: TL7705CPW is 4.5 V, TL7709CPW is 4.63 V. Electrical substitution requires verification of threshold match for the target application's supply margin.