Texas Instruments TLC7703IP

Overview

TLC7703IP from Texas Instruments is a micropower supply voltage supervisor IC designed for reset control in microcomputer and microprocessor systems. It features a fixed 2.63 V negative-going input threshold voltage at SENSE, programmable delay time via external capacitor (td = 2.1 × 10⁴ × CT), defined RESET output down to VDD ≥ 1 V, and maximum supply current of 16 µA over –40°C to 85°C operation.

For engineers reviewing the TLC7703IP datasheet, TLC7703IP pinout, TLC7703IP application, or TLC7703IP equivalent, this device is selected for low-power, precision undervoltage monitoring with battery-backed SRAM power-down support in medical imaging, industrial controllers, and embedded instrumentation where stable reset assertion during brownout is critical.

Technical Context

The TLC7703IP integrates a precision temperature-compensated voltage reference and internal timer to generate a controlled reset pulse after VDD stabilizes above 2 V and SENSE drops below 2.63 V. Its dual-output architecture (RESET and RESET) supports active-high and active-low logic families simultaneously.

It implements power-on reset generation when VDD reaches 1 V, automatic reset recovery with hysteresis (70 mV), and CONTROL pin logic enabling SRAM chip-select disable during power failure-requiring battery-supplied VDD for memory retention functionality.

Key Specifications

Pinout & Package

Package: PDIP-8 (Plastic Dual In-line Package, 0.300-inch width). RoHS-compliant, through-hole mountable, NIPDAU lead finish, no moisture sensitivity level (MSL) restriction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC7703IPWR, the TLC7703IP offers through-hole assembly flexibility and legacy board compatibility; versus TPS3808G33DBVR, it provides configurable timing and dedicated SRAM retention logic-making it superior for systems requiring field-serviceable reset tuning or battery-backed memory preservation.

Availability

TLC7703IP is available at Aetrix Electronics and suitable for medical imaging subsystems, industrial PLC controllers, and battery-backed data loggers requiring stable component supply with long-term manufacturability assurance.

Supply support for TLC7703IP 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 emphasis on reliability, precision, and energy efficiency.

The TLC77xx family was engineered specifically for micropower supply supervision in safety-critical and battery-operated systems, emphasizing robust reset generation, temperature-stable thresholds, and SRAM retention support.

FAQ

What is the exact threshold voltage of the TLC7703IP and how is it specified?

The TLC7703IP has a fixed negative-going input threshold voltage of 2.63 V at the SENSE pin, with a tolerance of ±0.07 V (2.56 V to 2.70 V) across the full operating temperature and supply range. This value is guaranteed in the Electrical Characteristics table of the SLVS087M datasheet and applies specifically to the TLC7703IP variant-not other members of the TLC77xx family. The threshold is internally trimmed and temperature-compensated.

Can the TLC7703IP be used to monitor a 5 V rail, and what is its behavior at that voltage?

Yes, the TLC7703IP supports supply voltages up to 6 V, making it fully compatible with 5 V rails. At VDD = 5 V, its SENSE threshold remains 2.63 V, allowing undervoltage detection well below nominal rail level. Output drive capability is maintained at ±2 mA, and supply current stays within 9–16 µA. The device operates reliably across the full –40°C to 85°C range under these conditions.

How does the CONTROL pin function in the TLC7703IP, and what is its role in SRAM applications?

In the TLC7703IP, the CONTROL pin configures the polarity of the RESET output: when tied to GND, RESET becomes active-high, enabling direct interface with SRAM chip-select logic. When combined with battery-backed VDD, this allows automatic disabling of memory access during main power failure-preserving data integrity. The CONTROL pin must not be left floating and requires a solid ground connection for this mode.

What is the minimum required capacitor value for achieving a 100 ms delay with the TLC7703IP?

Using the formula td = 2.1 × 10⁴ × CT, a 100 ms (0.1 s) delay requires CT = 0.1 / 21000 ≈ 4.76 nF. A standard 4.7 nF ceramic capacitor meets this requirement. The datasheet specifies performance with CT ≥ 100 pF, and stability is improved with X7R dielectric and proper PCB layout (short traces, local ground plane).

Is the TLC7703IP pin-compatible with other devices in the TLC77xx family, such as the TLC7725IP or TLC7705IP?

Yes, all PDIP-8 variants in the TLC77xx family-including TLC7703IP, TLC7725IP, and TLC7705IP-share identical pinouts and package dimensions. They differ only in fixed SENSE threshold voltage (2.63 V, 2.25 V, and 4.55 V respectively) and part marking. This allows direct substitution in existing layouts when threshold requirements change, provided the new threshold aligns with the monitored rail.