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Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface
Datasheet
Revision 1.4 (08-19-08) 442 SMSC LAN9311/LAN9311i
DATASHEET
Chapter 15 Operational Characteristics
15.1 Absolute Maximum Ratings*
Supply Voltage (VDD33A1, VDD33A2, VDD33BIAS, VDD33IO) (Note 15.1) . . . . . . . . . . . 0V to +3.6V
Positive voltage on signal pins, with respect to ground (Note 15.2) . . . . . . . . . . . . . . . . . . . . . . . . .+6V
Negative voltage on signal pins, with respect to ground (Note 15.3) . . . . . . . . . . . . . . . . . . . . . . .-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 (T
A
). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Note 15.4
Storage Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-55
o
C to +150
o
C
Lead Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Refer to JEDEC Spec. J-STD-020
HBM ESD Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..+/- 5kV
Note 15.1 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 15.2 This rating does not apply to the following pins: XI, XO, EXRES.
Note 15.3 This rating does not apply to the following pins: EXRES.
Note 15.4 0
o
C to +70
o
C for commercial version (LAN9311), -40
o
C to +85
o
C for industrial version
(LAN9311I)
*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 15.2, "Operating Conditions**", Section 15.4, "DC Specifications", or any other applicable
section of this specification is not implied. Note, device signals are
NOT 5 volt tolerant.
15.2 Operating Conditions**
Supply Voltage (VDD33A1, VDD33A2, VDD33BIAS, VDD33IO). . . . . . . . . . . . . . . . . +3.3V +/- 300mV
Ambient Operating Temperature in Still Air (T
A
). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Note 15.4
**Proper operation of the LAN9311/LAN9311i is guaranteed only within the ranges specified in this
section.