
SMSC DS – LPC47M14X 
Page 172 
Rev. 03/19/2001 
9 
OPERATIONAL DESCRIPTION 
9.1 
Operating Temperature Range...........................................................................................................................0
o
C to +70
o
C 
Storage Temperature Range............................................................................................................................-55
o
 to +150
o
C 
Lead Temperature Range ............................................................................................... Refer to JEDEC Spec. J-STD-020 
Positive Voltage on any pin, with respect to Ground.................................................................................................V
cc
+0.3V 
Negative Voltage on any pin, with respect to Ground.....................................................................................................-0.3V 
Maximum V
cc
...................................................................................................................................................................+5.5V 
Note:
  Stresses above those listed above could cause permanent damage to the device.  This is a stress rating only and 
functional operation of the device at any other condition above those indicated in the operation 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 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. 
MAXIMUM GUARANTEED RATINGS 
9.2 
 (T
A
 = 0
°
C - 70
°
C, V
cc
 = +3.3 V ± 10%) 
PARAMETER
I Type Input Buffer
Low Input Level 
High Input Level   
IS Type Input Buffer 
Low Input Level 
High Input Level 
Schmitt Trigger Hysteresis 
Input Leakage, I and IS 
Buffers
Low Input Leakage 
High Input Leakage 
DC ELECTRICAL CHARACTERISTICS 
SYMBOL
V
ILI
V
IHI
V
ILIS
V
IHIS
V
HYS
I
IL
I
IH
V
OL
V
OH
MIN 
2.0 
2.2 
TYP 
MAX 
0.8 
UNITS 
V 
V 
V 
V 
mV 
μA 
μA 
V 
V 
COMMENTS
TTL Levels 
100 
0.8 
Schmitt Trigger 
Schmitt Trigger 
-10 
-10 
+10 
+10 
V
IN
 = 0 
V
IN
 = V
CC
I
OL
 =  6mA 
I
OH
 = -3mA 
O6 Type Buffer 
Low Output Level 
High Output Level   
2.4 
0.4