Single-Chip Ethernet Controller with HP Auto-MDIX Support and PCI Interface

Datasheet

Chapter 5 Operational Characteristics

5.1Absolute Maximum Ratings*

Supply Voltage (VDD33A, VDD33BIAS, VDD33IO) (Note 5.1) . . . . . . . . . . . . . . . . . . . . . . 0V to +3.6V

Positive voltage on signal pins, with respect to ground (Note 5.2) . . . . . . . . . . . . . . . . . . . . . . . . . . +6V

Negative voltage on signal pins, with respect to ground (Note 5.3) . . . . . . . . . . . . . . . . . . . . . . . . -0.5V

Positive voltage on XI, with respect to ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +4.6V

Positive voltage on XO, with respect to ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +2.5V

Ambient Operating Temperature in Still Air (TA). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Note 5.4 Storage Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-55oC to +150oC

Lead Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Refer to JEDEC Spec. J-STD-020

HBM ESD Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..+/- 5kV

Note 5.1 When powering this device from laboratory or system power supplies, it is important that the absolute maximum ratings not be exceeded or device failure can result. Some power supplies exhibit voltage spikes on their outputs when AC power is switched on or off. In addition, voltage transients on the AC power line may appear on the DC output. If this possibility exists, it is suggested that a clamp circuit be used.

Note 5.2 This rating does not apply to the following pins: XI, XO, EXRES.

Note 5.3 This rating does not apply to the following pins: EXRES.

Note 5.4 0oC to +70oC for commercial version, -40oC to +85oC for industrial version.

*Stresses exceeding those listed in this section could cause permanent damage to the device. This is a stress rating only. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Functional operation of the device at any condition exceeding those indicated in Section 5.2, "Operating Conditions**", Section 5.4, "DC Specifications", or any other applicable section of this specification is not implied. Note, device signals are NOT 5 volt tolerant.

5.2Operating Conditions**

Supply Voltage (VDD33A, VDD33BIAS, VDD33IO). . . . . . . . . . . . . . . . . . . . . . . . . . . +3.3V +/- 300mV

Ambient Operating Temperature in Still Air (TA). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Note 5.4

**Proper operation of LAN9420/LAN9420i is guaranteed only within the ranges specified in this section.

SMSC LAN9420/LAN9420i

155

Revision 1.22 (09-25-08)

 

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