COM20051I Datasheet, PDF (66/74 Pages) SMSC Corporation – Integrated Microcontroller and ARCNET (ANSI 878.1) Interface

OPERATIONAL DESCRIPTION
MAXIMUM GUARANTEED RATINGS*
Operating Temperature Range.............................................................................................................. -40oC to +85oC
Storage Temperature Range............................................................................................................... -55oC to +150oC
Lead Temperature (soldering, 10 seconds)........................................................................................................+325 ^oC
Positive Voltage on any pin, with respect to ground ...................................................................................... VCC+0.3V
Negative Voltage on any pin, with respect to ground...............................................................................................-0.3V
Maximum VCC ......................................................................................................................................................... +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
VCC= 5.0V ± 10%
COM20051: (TA=0# C to +70# C, COM20051I: (TA =-40# C to +85# C
PARAMETER
SYMBOL MIN
TYP MAX
Low Input Voltage 1 (All
V_IL1
0.8
inputs except A2,
XTAL1, nRESET, nRD,
nWR, and RXIN)
V
High Input Voltage 1
IH1
2.0
(All Inputs except A2,
XTAL1, nRESET, nRD,
nWR, and RXIN)
Low Input Voltage
V
1.0
IL2
(XTAL1)
UNIT
COMMENT
V TTL Levels
V TTL Levels
V TTL Clock Input
High Input Voltage
(XTAL1)
V_IH2
4.0
V TTL Clock Input
Low to High Threshold
V
ILH
Input Voltage
1.8
V Schmitt Trigger @ 5V
(nRESET,nRD, nWR,
RXIN)
High to Low Threshold
V_IHL
Input Voltage
1.2
V Schmitt Trigger @ 5V
(nRESET, nRD,nWR,
RXIN)
Low Output Voltage
V
OL
(Ports 1, 2 and 3,
ALE, PSEN)
0.3
V IOL = 100 " A
0.45
1.0
V
V
IOL = 1.6 mA
IOL = 3.5 mA
Low Output Voltage
(Port 0)
V
OL1
0.3
V IOL = 200 " A
0.45
1.0
V
V
IOL = 3.2 mA
IOL = 7.0 mA
High Output Voltage
(Ports 1, 2 and 3,
ALE, PSEN)
V
V -0.3
OH
CC
V_CC-0.7
V -1.5
CC
V IOH = -10 "A
V
V
IOH = -30 "A
IOH = -60 "A
SMSC DS – COM20051I
Page 66
Rev. 03/27/2000