XR68C681CJ EXAR [Exar Corporation], XR68C681CJ Datasheet - Page 35
![no-image](/images/no-image-200.jpg)
XR68C681CJ
Manufacturer Part Number
XR68C681CJ
Description
CMOS Dual Channel UART (DUART)
Manufacturer
EXAR [Exar Corporation]
Datasheet
1.XR68C681CJ.pdf
(75 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
XR68C681CJ
Manufacturer:
EXAR
Quantity:
5 510
Company:
Part Number:
XR68C681CJ
Manufacturer:
ALTERA
Quantity:
5 510
Part Number:
XR68C681CJ
Manufacturer:
XR
Quantity:
20 000
Company:
Part Number:
XR68C681CJ-F
Manufacturer:
EXAR
Quantity:
1 150
Company:
Part Number:
XR68C681CJ-F
Manufacturer:
Exar Corporation
Quantity:
10 000
Part Number:
XR68C681CJ-F
Manufacturer:
EXAR/艾科嘉
Quantity:
20 000
Company:
Part Number:
XR68C681CJTR-F
Manufacturer:
RENESAS
Quantity:
1 001
Company:
Part Number:
XR68C681CJTR-F
Manufacturer:
Exar Corporation
Quantity:
10 000
D.8 Explanation of Clock Timing Signals
t
t
Time - IP2 Input
CLK
CTC
f
CLK
- X1/CLK (External) High or Low Time
- Counter/Timer External Clock High or Low
Symbol
- X1/CLK Crystal High or Low Time
Table 11. The XR68C681 Data Sheet presents the following parameter specifications, in the
Parameter
“AC ELECTRICAL CHARACTERISTICS”
f
Input
t
via IP2, IP3, IP4 and IP5
CTC
RTX
- RXC and TXC (External) High or Low Time -
- Counter/Timer External Clock Frequency - IP2
Min.
Limits
Typ.
XR68C681
Max.
Units