COM20019 Datasheet, PDF (51/81 Pages) SMSC Corporation – Low Cost ARCNET (ANSI 878.1) Controller with 2K x 8 On-Board RAM

OPERATIONAL DESCRIPTION
MAXIMUM GUARANTEED RATINGS*
Operating Temperature Range.....................................................................................................0^oC to +70^oC
Storage Temperature Range.................................................................................................. -55^oC to +150^oC
Lead Temperature (soldering, 10 seconds) ......................................................................................... +325 ^oC
Positive Voltage on any pin, with respect to ground ........................................................................ V_DD+0.3V
Negative Voltage on any pin, with respect to ground............................................................................... -0.3V
Maximum V_DD ............................................................................................................................................. +7V
*Stresses above those listed may cause permanent damage to the device. This is a stress rating only and
functional operation of the device at these or any other condition above those indicated in the operational
sections of this specification is not implied.
Note: 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 or "glitches" on their outputs when the 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.
DC ELECTRICAL CHARACTERISTICS
V_DD=5.0V±10%
COM20019: T_A=0^oC to +70^oC, COM20019I: T_A=-40^oC to +85^oC
PARAMETER
SYMBOL
MIN TYP
Low Input Voltage 1
V_IL1
(All inputs except A2,
XTAL1, nRESET, nRD,
nWR, and RXIN)
High Input Voltage 1
(All inputs except A2,
V_IH1
2.0
XTAL1, nRESET, nRD,
nWR, and RXIN)
Low Input Voltage 2
V_IL2
(XTAL1)
High Input Voltage 2
(XTAL1)
V_IH2
4.0
Low to High Threshold
V_ILH
1.8
Input Voltage
(A2, nRESET, nRD, nWR,
and RXIN)
High to Low Threshold
V_IHL
1.2
Input Voltage
(A2, nRESET, nRD, nWR,
and RXIN)
MAX
0.8
1.0
UNIT
COMMENT
V TTL Levels
V TTL Levels
V TTL Clock Input
V
V Schmitt Trigger,
All Values at V_DD =
5V
V
51
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