K25C81-FB Datasheet, PDF (11/12 Pages) Semtech Corporation – Versatile PC/XC/AT/PS/2 Compatible Keyboard Encoder

ELECTRICAL SPECIFICATIONS
Absolute Maximum Ratings
Ratings
Supply Voltage
Input Voltage
Current Drain per Pin
(not including Vss or Vdd)
Operating Temperature
K25C81
Storage Temperature Range
Symbol
Vdd
Vin
I
Ta
Tstg
Value
-0.3 to +7.0
Vss -0.3 to Vdd +0.3
25
T low to T high
40 to +85
-65 to +150
Unit
V
V
mA
°C
°C
Thermal Characteristics
Characteristic
Symbol
Value
Unit
Thermal Resistence
Tja
° C per W
Plastic
60
DIP
-60
Plcc
70
DC Electrical Characteristics (Vdd=5.0 Vdc +/-10%, Vss=0 Vdc, Temperature range=T low to T high unless otherwise noted)
Characteristic
Symbol
Min
Typ
Max
Unit
Output Voltage (I load<10µA)
Vol
0.1
V
Voh
Vdd–0.1
Output High Voltage (I load=0.8mA) Voh
Vdd–0.8
V
Output Low Voltage (I load=1.6mA) Vol:
0.4
V
Input High Voltage
Vih
0.7xVdd
Vdd
V
Input Low Voltage
Vil
Vss
0.2xVdd
V
Supply Current
Idd
4.7
7.0
mA
I/O Ports Hi-Z Leakage Current
Iil
+/-10
µA
Input Current
Iin
+/- 1
µA
I/O Port Capacitance
Cio
8
12
pF
Control Timing (Vdd=5.0 Vdc +/-10%, Vss=0 Vdc, Temperature range=T low to T high unless otherwise noted)
Characteristic
Symbol
Min
Max
Frequency of Operation
fosc
Crystal Option
4.0
External Clock Option
dc
4.0
Unit
MHz
Copyright Semtech, 1997-2001
11
DOC5-C81-DS-105
www.semtech.com