LMC6953CM/NOPB

Supervisors Overview

The LMC6953CM/NOPB is a dual-channel voltage supervisor designed for PCI Local Bus applications. It monitors two input voltages with thresholds of 2.65 V and 4.4 V. The device features an active low, open-drain output and manual reset capability. It operates within a supply voltage range up to 6 V and functions between 0°C and +70°C. Packaged in an 8-SOIC surface-mount format, this component provides essential power supervision for compliant systems.

Supervisors Feature Summary

• Dual-channel voltage monitoring for PCI Local Bus compliance
• Active low open-drain output configuration
• Manual reset functionality included

Supervisors Applications

• PCI Local Bus power supervision
• Voltage monitoring for peripheral components
• System reset circuitry design

Supervisors Procurement Notes

This component is officially discontinued by Texas Instruments. Verify availability through secondary market channels or obsolete inventory suppliers. Confirm RoHS compliance status and original manufacturer documentation before integration into new designs due to end-of-life status.

Supervisors Selection Notes

Select this part only for legacy PCI Local Bus maintenance or replacement scenarios. Ensure the 2.65 V and 4.4 V threshold requirements match the target system rails. Consider modern equivalents if new production is required, as this specific package and revision are no longer manufactured by the primary vendor.

Supervisors Part Context

Originally developed by National Semiconductor and later acquired by Texas Instruments, the LMC6953 series was engineered to meet PCI Specification Revision 2.1 standards. The device serves as a specialized power supervisor for computer peripherals requiring precise voltage tracking and reliable reset signaling under standard operating conditions.

Supervisors Replacement Considerations

No direct public substitute part numbers are confirmed for this discontinued component. Engineers should evaluate current-generation voltage supervisors with compatible threshold voltages and SOIC-8 packaging for functional equivalence in updated designs.

Supervisors FAQ

What are the specific voltage thresholds monitored by the LMC6953CM/NOPB?

The device monitors two inputs with fixed thresholds of 2.65 V and 4.4 V.

Does the LMC6953 include a watchdog timer function?

No, the LMC6953 does not include a watchdog timer; it provides basic voltage supervision and manual reset capabilities.