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LMC6953

Features: Compliant to PCI specifications revision 2.1.Under and over voltage detectors for 5V and 3.3VPower failure detection (5V falling under 3.3V by 300 mV max)Manual reset input pinGuaranteed RESET assertion at VDD = 1.5VIntegrated reset delay circuitryOpen drain outputAdjustable reset delay ...

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SeekIC No. : 004396555 Detail

LMC6953: Features: Compliant to PCI specifications revision 2.1.Under and over voltage detectors for 5V and 3.3VPower failure detection (5V falling under 3.3V by 300 mV max)Manual reset input pinGuaranteed R...

LMC6953 Data Sheet

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Part Number:
LMC6953
Supply Ability:
5000

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  • 1~5000
  • Unit Price
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  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

Compliant to PCI specifications revision 2.1.
Under and over voltage detectors for 5V and 3.3V
Power failure detection (5V falling under 3.3V by 300 mV max)
Manual reset input pin
Guaranteed RESET assertion at VDD = 1.5V
Integrated reset delay circuitry
Open drain output
Adjustable reset delay
Response time for over and under voltage detection: 490 ns Max
Power failure response time: 90 ns Max
Requires minimal external components




Application

Desktop PCs
PCI-Based Systems
Network servers




Pinout

Connection Diagram




Specifications

Power on Reset Yes
Watchdog No
Power Fail Input No
Manual Reset Yes
Reset Timeout Period 100 ms
On/Off Pin No
Error Flag Yes
Input Min Voltage 1.5 Volt
Input Max Voltage 6 Volt
Output Current 15 mA
RegType Supervisor
Temperature Max 70 deg C
View Using Catalog


ESD Tolerance (Note 2)
Human Body Model 2 kV
Machine Model 200V
Voltage at Input Pin 7V
Supply Voltage 7V
Current at Output Pin 15 mA
Current at Power Supply Pin (Note 3)10 mA
Lead Temp. (Soldering, 10 sec.) 260°C
Storage Temperature Range −65°C to +150°C
Junction Temperature 150°C




Description

The LMC6953 is a voltage supervisory chip designed to meet PCI (Peripheral Component Interconnect) Specifications Revision 2.1. It monitors 5V and 3.3V power supplies. In cases of power-up, power-down, brown-out, power failure and manual reset interrupt, the LMC6953 provides an active low reset. RESET# holds low for 100 ms after both 5V and 3.3V powers recover, or after manual reset signal returns to high state. The external capacitor on pin 8 adjusts the reset delay.

This part is ideal on PCI motherboards or add-in cards to ensure the integrity of the entire system when there is a fault condition. The active low reset sets the microprocessor or local device in a known state.

The LMC6953 has a built-in bandgap reference that accurately determines all the threshold voltages. The internal reset delay circuitry eliminates additional discrete components.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LMC6953CM CS100 1 13986 72 0 898000 4 254809951
LMC6953CMX CS100 1 13986 72 0 898000 4 254809951

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.


Application Notes

Title Size in Kbytes Date
AN-1077: Application Note 1077 Understanding The Power Supply Requirements of PCI Bus Standard-How to Protect The Digital Components 74 Kbytes 1-May-04 Download

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