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K25C81-POS-CFB PDF预览

K25C81-POS-CFB

更新时间： 2024-01-14 21:13:59
品牌 Logo 应用领域
商升特 - SEMTECH 编码器PC
页数 文件大小 规格书
12页 126K
描述
Microprocessor Circuit, CMOS, PQFP44

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K25C81-POS-CFB 技术参数

是否无铅：含铅是否Rohs认证：不符合
生命周期：Obsolete零件包装代码：DIP
包装说明：DIP,针数：40
Reach Compliance Code：unknownHTS代码：8542.31.00.01
风险等级：5.91Is Samacsys：N
JESD-30 代码：R-PDIP-T40JESD-609代码：e0
长度：52.07 mm端子数量：40
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：DIP
封装形状：RECTANGULAR封装形式：IN-LINE
峰值回流温度（摄氏度）：NOT SPECIFIED认证状态：Not Qualified
座面最大高度：5.08 mm最大供电电压：5.5 V
最小供电电压：4.5 V标称供电电压：5 V
表面贴装：NO技术：CMOS
温度等级：INDUSTRIAL端子面层：Tin/Lead (Sn/Pb)
端子形式：THROUGH-HOLE端子节距：2.54 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：15.24 mmuPs/uCs/外围集成电路类型：MICROPROCESSOR CIRCUIT
Base Number Matches：1

K25C81-POS-CFB 数据手册

 浏览型号K25C81-POS-CFB的Datasheet PDF文件第2页浏览型号K25C81-POS-CFB的Datasheet PDF文件第3页浏览型号K25C81-POS-CFB的Datasheet PDF文件第4页浏览型号K25C81-POS-CFB的Datasheet PDF文件第5页浏览型号K25C81-POS-CFB的Datasheet PDF文件第6页浏览型号K25C81-POS-CFB的Datasheet PDF文件第7页 
Fle x iCo d e rTM K2 5 C8 1  
Versatile PC/XC/AT/PS/2 Compatible  
Keyboard Encoder  
HID & S YS TEM MANAGEMENT P RODUCTS , KEYCODERTM FAMILY  
DESCRIPTION  
FEATURES  
The FlexiCoderTM is a versatile, low-  
power keyboard encoder. It offers  
two bi-directional channels for  
communicating with a  
• Directly interfaces a PC  
keyboard port  
• Encodes up to 144 custom keys  
on an 8 X 18 matrix  
• Enables custom keypad scan  
codes to remain unaffected by  
the Shift States of an external  
keyboard  
PC/XT/AT/PS2 system, and/or any  
optional keyboard-compatible  
devices, such as an 83 or 101/102  
standard desktop keyboard, OCR,  
barcode reader, etc. The K25C81  
directly interfaces a PC keyboard  
port, making custom keyboard to  
system communications fully  
transparent.  
• Buffers up to 122 keycodes  
• Interfaces to 83/101/102  
standard keyboard or other  
8042-compatible device  
• Includes jumper-selectable auto-  
repeat for designated keys  
• Offers two-key inhibit scanning  
mode  
APPLICATIONS  
• Custom keyboards/keypads  
• Control panels  
• Automatic teller machines  
• Embedded control systems  
• Public Information Kiosks  
• Instrumentation  
• Test and Measurement equipment  
• Point of Sales terminals  
• Industrial Controllers  
On an 8 x 18 matrix, the  
FlexiCoderTM will scan, debounce  
and encode up to 144 keys. Scan  
codes corresponding to single keys  
of the IBM 101 keyboard, or a  
combination of these keys when  
depressed with Shift, Ctrl, and Alt  
keys, are generated with each key  
press. Custom keypad input is not  
effected by the Shift States of an  
external keyboard.  
• Medical Instruments  
PIN ASSIGNMENTS  
1
2
3
4
5
6
7
8
9
40 Vcc  
39 OSCI  
38 OSCO  
37 EKC1  
36 R7  
_RESET  
_IRQ  
VX  
C17  
R6  
Users can conveniently define key  
assignments on the matrix as single  
or repeating actions. All keys must  
be released between key strokes or  
scanning is suspended. The  
RP  
35 NC  
34 R5  
1
6
40  
KD  
NC  
R6  
1
39  
R7  
NC  
R5  
R4  
R3  
7
RP  
KD  
KC  
EKC  
EKD  
R5  
RP  
KD  
KC  
KC  
33 R4  
R4  
EKC  
32 R3  
R3  
DIP  
R2  
EKC  
EKD  
C16  
C0  
EKD 10  
C16 11  
C0 12  
C1 13  
C2 14  
C3 15  
C4 16  
C5 17  
C6 18  
C7 19  
Vss 20  
31 R2  
34 R2  
R1  
C16 12  
C0  
P LCC  
R1  
QFP  
30 R1  
R0  
R0  
C8  
C9  
C10  
C1  
C2  
C3  
C4  
C8  
C9  
C10  
C11  
encoder can buffer up to 122  
29 R0  
C1  
28 C8  
27 C9  
26 C10  
25 C11  
keycodes, and control inputs and  
outputs are provided for interfacing  
with contact keyboards.  
29  
28  
C2  
17  
18  
23  
C3  
C12  
24  
The FlexiCoderTM is ideal for use  
with either BIOS-compatible chip  
sets or single-board computers for  
PC systems requiring a custom  
keyboard / keypad as an alternate  
or additional input device. Boards  
and evaluation kits are immediately  
obtainable and ready to connect.  
23 C13  
22 C14  
21 C15  
FlexiCoderTM is a trademark of Semtech Corp. All  
other trademarks belong to their respective  
companies.  
Copyright Semtech, 1997-2001  
DOC5-C81-DS-105  
www.semtech.com  
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