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參數(shù)資料
| 型號(hào)： | SN54AHCT161 |
| 廠商： | Texas Instruments, Inc. |
| 元件分類(lèi)： | 通用總線功能 |
| 英文描述： | 4-Bit Synchronous Binary Counters(4位二進(jìn)制同步計(jì)數(shù)器) |
| 中文描述： | 4位同步二進(jìn)制計(jì)數(shù)器（4位二進(jìn)制同步計(jì)數(shù)器） |
| 文件頁(yè)數(shù)： | 7/10頁(yè) |
| 文件大?。?/td> | 224K |
| 代理商： | SN54AHCT161 |
SN54AHCT161, SN74AHCT161
4-BIT SYNCHRONOUS BINARY COUNTERS
SCLS368A – MAY 1997 – REVISED JUNE 1997
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
timing requirements over recommended operating free-air temperature range,
V
CC
= 5 V
±
0.5 V (unless otherwise noted) (see Figure 1)
TA = 25
°
C
MIN
5
SN54AHCT161
MIN
5
SN74AHCT161
MIN
5
UNIT
MAX
MAX
MAX
tw
Pulse duration
CLK high or low
ns
CLR low
5
5
5
CLR
1.5
1.5
1.5
tsu
Setup time before CLK
↑
Data (A, B, C, and D)
4.5
4.5
4.5
ns
ENP, ENT
5
6
6
LOAD low
5
6
6
th
Hold time, all synchronous inputs after CLK
↑
1
1
1
ns
switching characteristics over recommended operating free-air temperature range,
V
CC
= 5 V
±
0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
LOAD
SN54AHCT161
TA = 25
°
C
TYP
185
UNIT
(OUTPUT)
CAPACITANCE
MIN
MAX
MIN
MAX
135
fmax
CL = 15 pF*
CL = 50 pF
115
MHz
125
95
85
tPLH*
tPHL*
tPLH*
tPHL*
tPLH*
tPHL*
tPLH*
tPHL*
CLK
Q
CL= 15 pF
CL = 15 pF
4.9
8.1
1
9.5
ns
4.9
8.1
1
9.5
CLK
RCO
CL= 15 pF
CL = 15 pF
4.9
8.1
1
9.5
ns
(count mode)
4.9
8.1
1
9.5
CLK
RCO
CL= 15 pF
CL = 15 pF
6.2
10.3
1
12
ns
(preset mode)
6.2
10.3
1
12
ENT
RCO
CL= 15 pF
CL = 15 pF
4.9
8.1
1
9.5
ns
4.9
8.1
1
9.5
tPHL*
CLR
Q
CL= 15 pF
CL = 15 pF
5.5
9
1
10.5
ns
RCO
5
8.6
1
10
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
CLK
Q
CL= 50 pF
CL = 50 pF
6.4
10.1
1
11.5
ns
6.4
10.1
1
11.5
CLK
RCO
CL= 50 pF
CL = 50 pF
6.4
6.4
10.1
10.1
1
1
11.5
11.5
ns
(count mode)
CLK
RCO
CL= 50 pF
7.7
7.7
12.3
12.3
1
1
14
14
ns
(preset mode)
ENT
RCO
CL= 50 pF
CL = 50 pF
6.4
10.1
1
11.5
ns
6.4
10.1
1
11.5
tPHL
CLR
Q
CL= 50 pF
CL = 50 pF
7
11
1
12.5
ns
RCO
6.5
10.6
1
12
* On products compliant to MIL-PRF-38535, this parameter is ensured but not production tested.
P
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