UR5HC418 Datasheet, PDF (2/14 Pages) Semtech Corporation – AT / PS/2 - Compatible Keyboard Encoder

FUNCTIONAL DIAGRAM
Data Buffer
ORDERING CODE
Package options
40-pin, Plastic DIP
44-pin, Plastic PLCC
44-pin, Plastic QFP
Pitch in mm’s
2.54
1.27
0.8
TA = -40°C to +85°C
UR5HC418-P
UR5HC418-FN
UR5HC418-FB
NL/CL/SL
3
Status LEDs
EKC1
Interrupt Control
KC
PC
Communication
KD
Channel
EKC
EKD
8042 Emulation
(External Keyboard)
Communication
Channel
Row Data Inputs
Column Select
Ouputs
Keyboard Encoder
16-Bit Timer
R0-R7
8
C0-C15
16
Mode Control
KT
DRV
Copyright ©1997-2001 Semtech Corporation
2
DOC5-418-DS-109
www.semtech.com