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| 型号： | 11C91DM |
| 英文描述： | Prescaler/Frequency Divider |
| 中文描述： | 分频器/分频器 |
| 文件页数： | 8/10页 |
| 文件大小： | 156K |
| 代理商： | 11C91DM |
Functional Description (Continued)
The ECL outputs have no pull-down resistors and can drive
series or parallel terminated transmission lines For short
interconnections that do not require impedance matching a
270X to 510X resistor to VEE can be used to establish the
VOL level Both VCC pins must always be used and should
be connected together as close to the package as possible
Pin 12 must always be connected to the VEE side of the
supply while pin 13 is required only if the TTL output is
used Low impedance VCC and VEE distribution and RF by-
pass capacitors are recommended to prevent crosstalk
Logic Diagram 11C90
TLF9892 – 6
Note
This diagram is provided for understanding of logic operation only It should not be used for evaluation of propagation delays as many internal functions are
achieved more efficiently than shown
Count Sequence Table 11C90
TLF9892 – 7
Note
A HIGH on MS forces all Qs HIGH
Operating Mode Table 11C90
Inputs
Output
MS
CE
M1
M2
Response
H
X
Set HIGH
L
H
X
Hold
LLLL
d
11
LL
H
X
d
10
LL
X
H
d
10
H e HIGH Voltage Level
L e LOW Voltage Level
X e Don’t Care
7
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