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

FUNCTIONAL DIAGRAM
ORDERING CODE
Package options
40-pin, Plastic DIP
44-pin, Plastic PLCC
44-pin, Plastic QFP
Pitch In mm’s
2.54 mm
1.27 mm
0.8 mm
TA = -40°C to +85°C
K25C81-XX-P
K25C81-XX-FN
K25C81-XX-FB
Data Buffer
Keyboard Encoder
EKC1
Interrupt Control
Row Data Inputs
Column Select Ouputs
R0-R7
8
C0-C17
18
KC
PC
Communication
KD
Channel
EKC
EKD
8042 Emulation
(Standard Keyboard)
Communication Channel
Mode Control
RP
Copyright Semtech, 1997-2001
2
DOC5-C81-DS-105
www.semtech.com