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參數(shù)資料
| 型號(hào)： | SNJ54HC161W |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 計(jì)數(shù)器 |
| 英文描述： | HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT UP BINARY COUNTER, CDFP16 |
| 封裝： | CERAMIC, DFP-16 |
| 文件頁(yè)數(shù)： | 5/27頁(yè) |
| 文件大?。?/td> | 886K |
| 代理商： | SNJ54HC161W |
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SN54HC161, SN74HC161
4BIT SYNCHRONOUS BINARY COUNTERS
SCLS297D JANUARY 1996 REVISED SEPTEMBER 2003
13
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
timing requirements over recommended operating free-air temperature range (unless otherwise
noted)
VCC
TA = 25°C
SN54HC161
SN74HC161
UNIT
VCC
MIN
MAX
MIN
MAX
MIN
MAX
UNIT
2 V
3.6
2.5
2.9
fclock
Clock frequency
4.5 V
18
12
14
MHz
fclock
Clock frequency
6 V
21
14
17
MHz
2 V
140
200
170
tw
Pulse duration, CLK high or low
4.5 V
28
40
36
ns
tw
Pulse duration, CLK high or low
6 V
24
36
30
ns
switching characteristics over recommended operating free-air temperature range, CL = 50 pF
(unless otherwise noted) (see Note 4)
PARAMETER
FROM
TO
VCC
TA = 25°C
SN54HC161
SN74HC161
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC
MIN
MAX
MIN
MAX
MIN
MAX
UNIT
2 V
3.6
2.5
2.9
fmax
4.5 V
18
12
14
MHz
fmax
6 V
21
14
17
MHz
NOTE 4: These limits apply only to applications that use more than two ’HC161 devices cascaded together.
If the ’HC161 devices are used as a single unit, or only two cascaded together, then the maximum clock
frequency that the device can use is not limited because of the glitch. In these situations, the device can be
operated at the maximum specifications.
A glitch can appear on RCO of a single ’HC161 device, depending on the relationship of ENT to CLK. Any
application that uses RCO to drive any input except an ENT of another cascaded ’HC161 device must take this
into consideration.
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