Texas Instruments TLC7701IP

Overview

TLC7701IP from Texas Instruments is a micropower supply voltage supervisor IC designed for reset control in microcomputer and microprocessor systems. It features a 1.1 V precision sense threshold, programmable delay time via external capacitor (td = 2.1 × 10⁴ × CT), defined RESET output down to VDD ≥ 1 V, and operates across 2 V to 6 V supply range with ≤16 µA quiescent current - ideal for battery-backed static RAM power-down control in medical imaging equipment.

For engineers reviewing the TLC7701IP datasheet, TLC7701IP pinout, TLC7701IP application, or TLC7701IP equivalent, this page delivers verified technical context, exact DRB/PDIP-8 package mapping, confirmed 1.1 V threshold behavior, and real-world design implications for undervoltage monitoring and power-on reset generation in low-power embedded systems.

Technical Context

The TLC7701IP implements a precision voltage sensor with temperature-compensated internal reference and hysteresis (70 mV typical) to prevent chatter during threshold crossing. Its dual-output architecture (RESET and RESET̅) supports both active-high and active-low reset signaling depending on CONTROL pin state.

Unlike fixed-threshold variants in the TLC77xx family, the TLC7701IP allows customization of its sense threshold using two external resistors - a unique capability among TLC77xx members - while retaining automatic reset generation after voltage drop and power-on reset initiation at VDD ≥ 1 V.

Key Specifications

Pinout & Package

Package: PDIP-8 (Plastic Dual In-line Package, 0.300-inch width). RoHS-compliant, through-hole mountable, rated for –40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC7701IPWR, the TLC7701IP offers through-hole manufacturability and legacy compatibility; versus TPS3808G12DBVR, it provides full configurability (threshold scaling, delay tuning, polarity control) essential for legacy system upgrades and battery-retention designs.

Availability

TLC7701IP is available at Aetrix Electronics and suitable for medical imaging subsystems, industrial PLCs, battery-backed memory modules, and low-power IoT sensor nodes requiring stable component supply with long-lifecycle support.

Supply support for TLC7701IP 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TLC77xx product line was engineered specifically for micropower supply voltage supervision in microcomputer systems, emphasizing precision threshold stability, programmable timing, and power-fail control for static RAM retention.

FAQ

What is the exact sense threshold voltage of the TLC7701IP, and how is it specified?

The TLC7701IP has a nominal sense threshold voltage of 1.1 V, with a tolerance of ±60 mV (1.04 V to 1.16 V) over the full operating temperature range. This value is measured at the SENSE pin under recommended conditions (VDD = 2 V to 6 V) and reflects the negative-going input threshold voltage (VIT–) where RESET activates. Unlike other TLC77xx variants with fixed internal dividers, the TLC7701IP supports external resistor customization of this threshold.

How does the CONTROL pin affect reset behavior in the TLC7701IP?

The CONTROL pin in the TLC7701IP determines reset polarity and enables SRAM power-down functionality. When CONTROL is tied to GND, RESET becomes active-high - allowing direct interface with microcontrollers requiring high-asserted reset. When driven by a memory bank select signal, it disables chip select during power failure, preserving data in battery-backed static RAM. This dual-mode operation is unique to the TLC7701IP within the family.

Can the TLC7701IP be used with a 1.8 V supply rail, and what are the limitations?

Yes, the TLC7701IP supports supply voltages as low as 2 V per datasheet specifications, so 1.8 V is outside its guaranteed operating range. At VDD < 2 V, RESET assertion at power-up (Vres = 1 V) remains functional, but electrical characteristics like VOH, VOL, and threshold accuracy are not assured. For 1.8 V systems, consider TI's TPS3808 series or similar 1.6 V–6 V supervisors with validated low-voltage performance.

What is the maximum recommended value for the external timing capacitor (CT) used with the TLC7701IP?

The TLC7701IP datasheet specifies delay time as td = 2.1 × 10⁴ × CT, with test conditions using CT = 100 nF (yielding td ≈ 2.1 ms). While no absolute maximum CT is stated, practical limits arise from leakage current, parasitic capacitance, and board area. Capacitors above 10 µF risk excessive delay (>210 s), poor temperature stability, and increased susceptibility to noise. For delays beyond 100 ms, TI recommends verifying stability with actual layout and temperature cycling.

Does the TLC7701IP provide hysteresis, and how does it impact system reliability?

Yes, the TLC7701IP includes built-in hysteresis of 70 mV (typical) on the SENSE input. This prevents oscillatory reset behavior during slow-rising or noisy supply ramps near the 1.1 V threshold - for example, when VDD recovers from a brownout. The hysteresis ensures RESET remains asserted until SENSE rises to ~1.17 V, then stays inactive until SENSE falls below ~1.10 V, providing clean, chatter-free reset signaling critical for deterministic microcontroller startup.