K25C81-FB Semtech, K25C81-FB Datasheet - Page 2

• Manufacturer Part Number: K25C81-FB
• Description: Versatile PC/XC/AT/PS/2 Compatible Keyboard Encoder
• Manufacturer: Semtech

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