ISL8702IBZ-T

Supervisors Overview

The ISL8702IBZ-T is an obsolete adjustable quad sequencer IC from the ISL870X family, manufactured by Renesas Electronics Corporation. It provides four delay-adjustable sequenced outputs while monitoring a single input voltage within the +2.5V to +12V range. The device supports auto-start mode with user-adjustable time delays for undervoltage/overvoltage compliance and sequencing start via an external capacitor. Subsequent ENABLE output signal delays are adjustable via external resistors. It includes dedicated inputs for sequencing on/off operation (SEQ_EN) and voltage window compliance reporting (FAULT). The component operates over a temperature range of -40°C to +85°C and is housed in a 14-pin SOICN package.

Supervisors Feature Summary

• Provides four independently delay-adjustable sequenced outputs for power-up management
• Monitors input voltage for overvoltage and undervoltage compliance within specified limits
• Supports daisy-chaining capability to expand sequencing beyond four signals
• Includes dedicated pins for sequencing control and fault reporting

Supervisors Applications

• Power sequencing for high-performance DSP systems
• Input power sequencing for FPGA subsystems
• Voltage sequencing for microprocessor (µP) initial power-up
• Monitoring distributed voltage compliance in electronic subsystems

Supervisors Procurement Notes

The ISL8702IBZ-T is scheduled for obsolescence and has been discontinued by the manufacturer. No new production units are available through official channels. Designers must verify current stock status with authorized distributors carefully, as availability is limited to existing inventory only. Replacement strategies should be initiated immediately to avoid supply chain disruptions for active products relying on this component.

Supervisors Selection Notes

Select this component only if legacy compatibility is required, as it is no longer in production. Ensure the input voltage range of +2.5V to +12V matches the system requirements, distinguishing it from the ISL8700/ISL8701 which support up to +24V. Verify that the 14-SOIC package fits the PCB layout constraints. Consider the need for external capacitors and resistors for timing adjustments when finalizing the bill of materials.

Supervisors Part Context

This part belongs to the ISL870X family of adjustable quad sequencers, which also includes the ISL8700 and ISL8701 models. While the ISL8700 and ISL8701 operate over a wider voltage range (+2.5V to +24V), the ISL8702 is specifically rated for +2.5V to +12V applications. All variants share similar functionality regarding adjustable delays and monitoring capabilities but differ in voltage tolerance and specific pin configurations for features like SEQ_EN and FAULT.

Supervisors Replacement Considerations

Public confirmed substitute part numbers are not provided in the source documentation due to the component's obsolete status. Designers should consult Renesas or Intersil technical support for validated alternatives compatible with the ISL8702 specifications.