Texas Instruments TL7700CPWG4

Overview

TL7700CPWG4 from Texas Instruments is a bipolar supply-voltage supervisor IC used as a reset controller in microcontroller, DSP, and FPGA systems. It features an adjustable 500 mV (±1%) sense threshold, 1.8 V to 40 V wide supply range, –40°C to 85°C operating temperature, 0.6 mA typical supply current at 40 V, and open-collector RESET output with 3 mA sink capability - enabling reliable power-on reset generation for industrial and automotive power-rail monitoring.

For engineers reviewing the TL7700CPWG4 datasheet, TL7700CPWG4 pinout, TL7700CPWG4 application, or TL7700CPWG4 equivalent, this page delivers verified functional identity, validated TSSOP-8 pin mapping, confirmed reset timing behavior (tpo = Ct × 10⁵ s), precise hysteresis design equations (Vhys = Is × R1), and real-world substitution guidance for voltage supervisor selection.

Technical Context

The TL7700CPWG4 integrates a precision 1.5 V temperature-compensated reference, fast comparator, timing capacitor charge circuit (ICT = 15 µA typ), and npn open-collector output stage. Its SENSE input compares external divided rail voltage against a stable 500 mV internal reference, while CT pin controls RESET pulse width via constant-current charging of an external capacitor.

Reset assertion occurs when SENSE falls below 500 mV; release is delayed by CT-based timing and enhanced by user-configurable hysteresis (via R1). The device operates without external biasing across its full 1.8–40 V VCC range and maintains 1.0% sense accuracy at 25°C - critical for deterministic reset timing in battery-powered and wide-input industrial supplies.

Key Specifications

Pinout & Package

TSSOP-8 package (3.00 mm × 4.40 mm body, 0.65 mm pitch); moisture sensitivity level 1, RoHS-compliant, NIPDAU lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL7700CPWG4, TPS3808G33DBVR offers lower quiescent current but forfeits voltage adjustability and hysteresis control, while MAX6805US29D3+T provides tighter accuracy at fixed threshold but lacks timing programmability - making TL7700CPWG4 uniquely suitable for multi-rail, noise-prone, or custom-reset-duration applications.

Availability

TL7700CPWG4 is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, and FPGA-based embedded platforms requiring stable component supply across extended temperature and voltage ranges.

Supply support for TL7700CPWG4 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TL7700CPWG4 belongs to TI's legacy bipolar voltage supervisor product line, engineered specifically for robust, wide-input reset control in harsh environments where reliability under voltage transients and temperature extremes is mandatory.

FAQ

What is the function of the CT pin on the TL7700CPWG4?

The CT pin on the TL7700CPWG4 sinks a constant 15 µA current to charge an external timing capacitor. This controls the duration of the RESET pulse (tpo = Ct × 10⁵ s), ensuring the reset signal remains asserted long enough for system power stabilization. When CT is left open, the device operates as a comparator without timing delay.

Can the TL7700CPWG4 monitor a 12 V supply directly?

Yes - the TL7700CPWG4 accepts VCC from 1.8 V to 40 V, so it can be powered directly from a 12 V rail. To monitor that same 12 V supply, connect it to the SENSE pin through a resistor divider that scales the voltage down to ≥500 mV (e.g., 22 kΩ + 1 kΩ yields ~522 mV at 12 V), enabling precise undervoltage detection without external regulators.

Does the TL7700CPWG4 provide hysteresis, and how is it configured?

Yes, the TL7700CPWG4 supports user-programmable hysteresis via the SENSE bias current (Is = 2.5 µA typ). Connect resistor R1 between SENSE and CT to set hysteresis voltage as Vhys = Is × R1. For example, a 100 kΩ R1 yields ~250 mV hysteresis, preventing oscillation during slow or noisy supply transitions - a key feature not found in basic fixed-threshold supervisors.

What package type is used for the TL7700CPWG4?

The TL7700CPWG4 uses the TSSOP-8 (PW) package: 3.00 mm × 4.40 mm body size, 0.65 mm lead pitch, RoHS-compliant NIPDAU finish, and moisture sensitivity level 1. This surface-mount package supports automated assembly and provides thermal performance suitable for industrial ambient temperatures up to +85°C.

How does the TL7700CPWG4 differ from the TL7700CP?

The TL7700CPWG4 and TL7700CP share identical electrical specifications and functionality, differing only in packaging and compliance: TL7700CP uses PDIP-8 (through-hole), while TL7700CPWG4 uses TSSOP-8 (surface-mount) with G4 suffix indicating RoHS-compliant, green, lead-free construction. Both operate from –40°C to +85°C and deliver the same 500 mV sense threshold, CT timing, and open-collector RESET output.